{"gene":"FYB1","run_date":"2026-06-09T23:54:44","timeline":{"discoveries":[{"year":1997,"finding":"FYB (FYN binding protein/p120/130) was cloned and shown to associate with the Src kinase p59(fyn) and with SLP-76 via the SLP-76 SH2 domain; it becomes tyrosine-phosphorylated upon TCR/CD3 ligation. Overexpression of FYB augmented IL-2 secretion from a T cell hybridoma in response to TCR ligation.","method":"cDNA cloning, co-immunoprecipitation, overexpression in T cell hybridoma","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal co-IP, direct binding mapped to SLP-76 SH2 domain, functional IL-2 assay, foundational paper replicated by multiple subsequent studies","pmids":["9207119"],"is_preprint":false},{"year":1997,"finding":"SLAP-130 (FYB1) was cloned as a hematopoietic-specific SLP-76-associated phosphoprotein that is a substrate of TCR-induced protein tyrosine kinases; its SH2 domain-mediated association with SLP-76 was demonstrated, and overexpression of SLAP-130 diminished TCR-induced IL-2 promoter activity and interfered with SLP-76-mediated augmentation, suggesting it acts as a negative regulator.","method":"Molecular cloning, co-immunoprecipitation (SH2 domain interaction), overexpression in Jurkat T cells with IL-2 promoter reporter assay","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct binding mapped to SLP-76 SH2 domain, functional reporter assay, replicated by subsequent work","pmids":["9115214"],"is_preprint":false},{"year":1998,"finding":"FYB binds SKAP55 and the related SKAP55R protein through their SH3 domains (interaction with proline-rich sequences of FYB), identified by yeast two-hybrid screen and confirmed by co-immunoprecipitation; FYB and SKAP55 colocalize in the perinuclear region. Both SKAP55 and SKAP55R serve as substrates for FYN kinase.","method":"Yeast two-hybrid screen, co-immunoprecipitation, confocal immunofluorescence microscopy, in vitro kinase assay","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — yeast two-hybrid plus co-IP in T cells, domain mapping, replicated by independent studies","pmids":["9671755"],"is_preprint":false},{"year":1998,"finding":"SLAP-130 (FYB1) is a component of the Fyn complex in human T cells and co-precipitates with SKAP55. The direct association between SLAP-130 and SKAP55 involves the SH3 domain of SKAP55 and the proline-rich sequence of SLAP-130, established by co-transfection of truncation/point mutants in COS cells and yeast two-hybrid.","method":"Co-immunoprecipitation from T cells, co-transfection with truncation mutants in COS cells, yeast two-hybrid","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — domain mapping by mutagenesis, reciprocal co-IP, multiple orthogonal methods","pmids":["9748251"],"is_preprint":false},{"year":1999,"finding":"FYN-T selectively phosphorylates FYB, creating a template for recruitment of FYN-T and SLP-76 SH2 domains. Co-expression of FYN-T, FYB, and SLP-76 synergistically up-regulates TCR-driven IL-2 transcription, defining a FYN-T–FYB–SLP-76 signaling matrix.","method":"In vitro kinase assay, co-immunoprecipitation, overexpression in T cell lines with IL-2 reporter assay","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — in vitro phosphorylation assay, co-IP, functional IL-2 reporter, consistent with multiple later studies","pmids":["10409671"],"is_preprint":false},{"year":1999,"finding":"FYB-130 is an alternatively spliced isoform of FYB with a 46-amino-acid insertion near the C-terminus; both FYB-120 and FYB-130 bind SLP-76 SH2 and FYN-T SH2 domains and are phosphorylated by FYN-T. FYB-130 caused a significant increase in TCR-driven NF-AT transcription when co-expressed with FYN-T and SLP-76.","method":"cDNA cloning, co-immunoprecipitation, overexpression with NF-AT reporter assay, FISH chromosomal mapping","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — single lab, reciprocal co-IP and functional reporter, two orthogonal methods","pmids":["10497204"],"is_preprint":false},{"year":1999,"finding":"Tyr595 and Tyr651 of FYB are major phosphorylation sites for FYN-T and mediate binding to the SLP-76 SH2 domain in Jurkat T cells. The synergistic up-regulation of IL-2 promoter activity in the FYN-T–FYB–SLP-76 pathway requires the FYB–SLP-76 interaction (at these tyrosines) but not the FYB–FYN-T interaction.","method":"Site-directed mutagenesis (Y→F), co-immunoprecipitation in Jurkat T cells, IL-2 promoter reporter assay","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — mutagenesis plus functional reporter plus co-IP, key phosphosites confirmed by later structural/proteomics studies","pmids":["10570256"],"is_preprint":false},{"year":2000,"finding":"FYB/SLAP was identified as a ligand for Ena/VASP EVH1 domains. Upon TCR engagement, FYB/SLAP localizes at the T cell–APC interface and associates with Ena/VASP family proteins, WASP, Nck, and SLP-76 in a complex. Inhibition of FYB/SLAP–Ena/VASP binding or WASP–Arp2/3 interaction impairs TCR-dependent actin rearrangement.","method":"Pulldown assay (EVH1 domain), co-immunoprecipitation, confocal microscopy (localization at T cell–bead interface), inhibitory peptide competition","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct biochemical pulldown, co-IP complex, live cell localization, functional inhibition, replicated in phagocytosis context","pmids":["10747096"],"is_preprint":false},{"year":2000,"finding":"SLAP-130/FYB undergoes rapid tyrosine phosphorylation upon α4β1 integrin stimulation and the phosphorylated form associates with the SH2 domain of p59fyn. Overexpression of SLAP-130/FYB in normal T cells enhances migration through fibronectin-coated filters in response to SDF-1α, identifying a role in β1 integrin signaling and T cell motility.","method":"Phosphorylation assay, co-immunoprecipitation, overexpression in primary T cells with transwell migration assay","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP and functional migration assay, single lab","pmids":["10640723"],"is_preprint":false},{"year":2000,"finding":"Overexpression of SLAP-130 abrogates SLP-76-mediated augmentation of NFAT/AP1 activity; Tyr559 of SLAP-130 is critical for SLP-76 association, and mutation of this residue diminishes SLAP-130's negative regulatory effect on SLP-76 function, specifically through ERK activation but not PLCγ1 phosphorylation.","method":"Deletion and point mutagenesis, co-transfection in SLP-76-deficient Jurkat cells, NFAT/AP1 reporter assay, phosphorylation analysis","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — mutagenesis identifying critical tyrosine, functional rescue in SLP-76-deficient cells, multiple readouts","pmids":["10671560"],"is_preprint":false},{"year":2001,"finding":"T cells from SLAP-130/Fyb knockout mice show markedly impaired proliferation after CD3 engagement. TCR fails to enhance integrin-dependent adhesion and LFA-1 clustering is defective, while TCR-induced actin polymerization is normal. This places SLAP-130/Fyb as coupling TCR-mediated actin rearrangement with integrin (LFA-1) clustering/activation.","method":"Genetic knockout mice, T cell proliferation assay, integrin adhesion assay, LFA-1 clustering assay (flow cytometry/microscopy), actin polymerization assay","journal":"Science","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO with multiple specific cellular phenotype readouts, published simultaneously with independent replication","pmids":["11567141"],"is_preprint":false},{"year":2001,"finding":"Fyb/Slap-deficient T cells exhibit defective proliferation, cytokine production, and TCR-induced integrin clustering and adhesion; Fyb/Slap has no apparent role in F-actin polymerization or TCR clustering. Fyb/Slap is the first adapter shown to specifically couple TCR stimulation to integrin avidity modulation.","method":"Genetic knockout mice, proliferation assay, cytokine ELISA, integrin clustering assay, F-actin assay, in vivo immune response assay","journal":"Science","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO, multiple orthogonal assays, independent replication in same issue","pmids":["11567140"],"is_preprint":false},{"year":2001,"finding":"Upon FcεRI aggregation on mast cells, FYB becomes tyrosine-phosphorylated and colocalizes with F-actin in membrane ruffles. FYB up-regulates β1 integrin-mediated adhesion to fibronectin and mediator (β-hexosaminidase) release; the FYB SH3 domain is required for mediator release but not adhesion, distinguishing two functional outputs.","method":"Overexpression in RBL-2H3 mast cells, phosphorylation assay, adhesion assay, degranulation assay (β-hexosaminidase), confocal microscopy, SH3 domain deletion mutants","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — domain mutagenesis (SH3 deletion) dissecting two functions, multiple assays, single lab","pmids":["11553777"],"is_preprint":false},{"year":2001,"finding":"Upon Fcγ receptor engagement during phagocytosis in macrophages, a large molecular complex containing Fyb/SLAP, SLP-76, Nck, Ena/VASP proteins, and WASP is formed. Fyb/SLAP recruits VASP and profilin to the phagocytic cup, coordinating actin polymerization for pseudopod extension and particle internalization.","method":"Co-immunoprecipitation from macrophages, immunofluorescence microscopy at phagocytic cup, functional phagocytosis assay","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 2 / Strong — complex formation by co-IP, spatial localization at phagocytic cup, functional rescue, consistent with T cell findings","pmids":["11739662"],"is_preprint":false},{"year":2001,"finding":"ADAP (FYB) promotes β1 integrin clustering kinetics on mast cells selectively; FcεRI receptor clustering was unaffected by ADAP overexpression, indicating specificity for integrins.","method":"Overexpression in mast cells, integrin clustering assay by flow cytometry/microscopy, receptor clustering controls","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — single OE experiment with specificity controls, single lab","pmids":["11741310"],"is_preprint":false},{"year":2003,"finding":"The Yersinia tyrosine phosphatase YopH targets Fyb (FYB1) in macrophages; YopH binds Fyb in both phosphotyrosine-dependent (N-terminal YopH substrate-binding domain and C-terminal catalytic region) and phosphotyrosine-independent (central YopH region with Fyb C-terminus) manners. Dephosphorylation of Fyb by YopH contributes to blockage of phagocytosis and cytotoxic effects on macrophages.","method":"YopH mutant analysis, GST pulldown, co-immunoprecipitation in infected cells, phagocytosis assay, YopH localization assay","journal":"Cellular microbiology","confidence":"High","confidence_rationale":"Tier 2 / Strong — mutagenesis of YopH binding domains, functional phagocytosis assay, consistent with follow-up study","pmids":["12542470"],"is_preprint":false},{"year":2003,"finding":"In mast cells, SLAP-130 and SKAP55 are the major MIST-associated phosphoproteins. MIST directly associates with SLAP-130 via MIST's SH2 domain; collaboration of SLAP-130 with SKAP55 recruits MIST to Lyn. SLAP-130/SKAP55 show higher affinity binding to Fyn-SH2 than Lyn-SH2, preferentially targeting MIST to Fyn.","method":"Co-immunoprecipitation in mast cell lines, pulldown, SH2 domain binding assay","journal":"FEBS letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct SH2 binding mapped, co-IP in mast cells, single lab","pmids":["12681493"],"is_preprint":false},{"year":2004,"finding":"The C-terminal domain of ADAP was solved by NMR spectroscopy as an altered SH3 fold (helically extended SH3, hSH3) in which an N-terminal amphipathic helix makes contacts to the regular SH3 scaffold. The hSH3 domain cannot bind conventional proline-rich peptides, distinguishing it functionally from canonical SH3 domains.","method":"NMR structure determination, proline-rich peptide binding assay","journal":"Structure","confidence":"High","confidence_rationale":"Tier 1 / Moderate — atomic resolution NMR structure with functional validation (peptide binding), single lab","pmids":["15062083"],"is_preprint":false},{"year":2004,"finding":"ADAP-SLP-76 binding (via YDDV motifs) differentially regulates pSMAC formation at the immunological synapse versus T cell–APC conjugation. Mutation of YDDV sites (M12) prevents LFA-1 clustering and conjugation enhancement but acts as a dominant negative specifically for pSMAC formation and IL-2 production. ADAP colocalizes with LFA-1 at the immunological synapse.","method":"Mutagenesis (YDDV→FDDF, M12), confocal microscopy (SMAC imaging), conjugation assay, LFA-1 clustering assay, IL-2 production assay","journal":"The Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — mutagenesis dissecting two functions, multiple orthogonal assays, single lab","pmids":["15477347"],"is_preprint":false},{"year":2005,"finding":"The hSH3 domain of ADAP binds acidic lipids including phosphatidylinositides (PIP2, PIP3) preferentially over monovalent PS; binding is dependent on the N-terminal helix of the hSH3 domain and basic surface patches. This identifies the hSH3 domain as a lipid interaction module.","method":"Lipid binding assay (liposome co-sedimentation), NMR chemical shift mapping, mutagenesis of basic residues","journal":"Journal of molecular biology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reconstitution plus NMR mapping, multiple lipid substrates tested, single lab","pmids":["15843031"],"is_preprint":false},{"year":2005,"finding":"ADAP interacts with c-Src in osteoclast precursors; c-Src kinase activity and SH2 domain are required for the association, with Tyr807 in ADAP identified as the major recognition site. ADAP is expressed in prefusion osteoclasts and localizes to lamellipodia leading edges. ADAP knockdown impairs migration and multinucleated cell formation in RAW264 cells.","method":"GST pulldown combined with mass spectrometry, co-immunoprecipitation, mutagenesis (Y807), ADAP knockdown (siRNA), migration assay, multinucleated cell formation assay","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — domain mapping by mutagenesis, co-IP, functional KD assay, single lab","pmids":["16020549"],"is_preprint":false},{"year":2005,"finding":"In the absence of ADAP, SKAP55 protein is rapidly degraded (half-life ~15–20 min vs. ~90 min with ADAP). ADAP protects SKAP55 from proteolysis via the SKAP55 SH3 domain interaction with ADAP; inactivating SKAP55's SH3 domain blocks this protective effect.","method":"ADAP-deficient Jurkat line with ADAP reconstitution, pulse-chase/proteolysis assay, SH3 domain mutants","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — pulse-chase quantification of protein stability, domain mutagenesis, ADAP reconstitution rescue, single lab","pmids":["15849195"],"is_preprint":false},{"year":2005,"finding":"Fyb (FYB1) interacts with mammalian actin binding protein 1 (mAbp1) via the mAbp1 SH3 domain binding the Fyb N-terminal region. The interaction is detected in macrophage lysates and the proteins co-localize with F-actin at the leading edge.","method":"Yeast two-hybrid screen (Fyb domains as bait), co-immunoprecipitation from macrophage lysates, co-localization by immunofluorescence","journal":"FEBS letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — two-hybrid plus co-IP plus co-localization, single lab, domain interaction mapped","pmids":["15848169"],"is_preprint":false},{"year":2005,"finding":"TCR-stimulated ROS generation leads to transient inactivation/oxidation of SHP-2 (but not SHP-1), which directly regulates phosphorylation of Vav1 and ADAP. The ADAP–SLP-76 association is regulated by SHP-2 in a redox-dependent manner, promoting T cell adhesion through an SLP-76-dependent pathway to integrin activation.","method":"ROS assay, PTP oxidation assay, co-immunoprecipitation, phosphorylation analysis, SHP-2 knockdown/inhibition","journal":"The EMBO journal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct SHP-2 regulation of ADAP phosphorylation demonstrated biochemically, redox-dependent co-IP, single lab","pmids":["15933714"],"is_preprint":false},{"year":2006,"finding":"ADAP is required for normal αIIbβ3 activation by VWF/GP Ib-IX-V and other agonists (ADP, PAR4) in platelets. ADAP stabilizes SKAP-HOM expression via its SH3 domain interaction, but SKAP-HOM is not required for αIIbβ3 activation. ADAP-deficient mice show increased rebleeding, establishing ADAP as a component of platelet inside-out signaling.","method":"ADAP-/- mice, fibrinogen/ligand-mimetic Fab binding assay, shear-flow adhesion assay, tail-bleeding assay, SKAP-HOM-/- comparison","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO, multiple agonist conditions, in vivo bleeding assay, comparison with SKAP-HOM-/- controls","pmids":["17003372"],"is_preprint":false},{"year":2006,"finding":"The ADAP/SKAP55 signaling module regulates TCR-mediated integrin activation through plasma membrane targeting of activated Rap1. Disruption of the ADAP/SKAP55 interaction displaces Rap1 from the plasma membrane without affecting Rap1 GTPase activity. Membrane targeting of the ADAP/SKAP55 module induces T cell adhesion even without TCR stimulation.","method":"Mutagenesis disrupting ADAP/SKAP55 interaction, Rap1 membrane fractionation, Rap1 GTPase assay, retroviral reconstitution, adhesion assay","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — domain disruption mutants, subcellular fractionation, GTPase assay, gain-of-function membrane targeting, single lab","pmids":["16980616"],"is_preprint":false},{"year":2007,"finding":"ADAP regulates TCR-mediated NF-κB activation by associating with the CARMA1 adapter. ADAP-deficient T cells show impaired NF-κB nuclear translocation, reduced IκB phosphorylation/degradation, and impaired CARMA1-BCL10-MALT1 complex assembly. A distinct region of ADAP is required for CARMA1 association and NF-κB activation, separate from the adhesion-regulatory domain.","method":"ADAP-/- mice, NF-κB nuclear translocation assay (EMSA), IκB phosphorylation/degradation assay, CBM complex assembly assay, co-immunoprecipitation, domain mutagenesis","journal":"Science","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO, multiple NF-κB assays, domain-specific mutagenesis dissecting adhesion vs NF-κB functions, single lab","pmids":["17478723"],"is_preprint":false},{"year":2007,"finding":"RIAM constitutively interacts with SKAP-55 and is a key component linking the ADAP/SKAP-55 module to active Rap1. The ADAP/SKAP-55 module relocates RIAM and Rap1 to the plasma membrane following TCR activation. The SKAP-55/RIAM complex is essential for TCR-mediated adhesion and T cell–APC conjugate formation.","method":"Co-immunoprecipitation in primary T cells and transfection system, domain mapping of SKAP-55/RIAM interaction, subcellular fractionation, adhesion assay, conjugate formation assay","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — co-IP in primary cells, domain mapping, membrane fractionation, functional adhesion assay","pmids":["17403904"],"is_preprint":false},{"year":2009,"finding":"ADAP is an essential component of outside-in αIIbβ3 signaling in platelets under shear flow. ADAP-/- platelets show reduced spreading and unstable thrombi under shear but not under static conditions. ADAP-sufficient platelets form F-actin–rich structures co-localizing with SLP-76 and phospho-Vav1 under shear; ADAP-/- platelets fail to form these structures. VASP- or SKAP-HOM-deficient platelets do not share this phenotype.","method":"ADAP-/- mice, shear-flow platelet spreading assay, ex vivo thrombus formation, F-actin microscopy, comparison with VASP-/- and SKAP-HOM-/- mice","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO, specific shear-flow condition, specificity shown by negative results with VASP/SKAP-HOM KOs","pmids":["19996090"],"is_preprint":false},{"year":2009,"finding":"The SLP-76–ADAP binding module is required for LFA-1-mediated outside-in costimulation of IL-2, F-actin clustering, T cell polarization, and motility. ADAP expression with LFA-1 ligation alone is sufficient to polarize T cells and increase motility; the M12 ADAP mutant (lacking SLP-76-binding sites) blocks LFA-1 costimulation of all these events. LFA-1–ADAP polarization depends on Src kinases, Rho GTPases, PLC, and PI3K.","method":"ADAP-/- T cells, ADAP M12 mutant, LFA-1 ligation assay, F-actin clustering (microscopy), polarization assay, T cell motility assay, pharmacological inhibitors","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO plus dominant-negative mutant, multiple assays, gain-of-function LFA-1 polarization","pmids":["19617540"],"is_preprint":false},{"year":2010,"finding":"ADAP contains three SLP-76 SH2 domain binding sites; multipoint binding to ADAP oligomerizes the SLP-76 SH2 domain in vitro and is critical for SLP-76 microcluster assembly in T cells. Biophysical methods (AUC, SPR) quantified oligomerization, and confocal imaging confirmed all three sites are required for full microcluster formation.","method":"Analytical ultracentrifugation (AUC), SPR biophysics, mutagenesis of ADAP binding sites, confocal imaging of SLP-76 microclusters, T cell functional assays","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — in vitro reconstitution with biophysical measurement plus cell imaging plus mutagenesis","pmids":["23979596"],"is_preprint":false},{"year":2010,"finding":"ADAP is a phosphotyrosine-dependent interaction hub: peptide pulldown with SILAC mass spectrometry identified SLP-76, PLCγ, PIK3R1, Nck, CRK, Gads, and RasGAP as phospho-dependent binding partners of the central YDDV motif of ADAP. The ADAP–Nck interaction (via pY595/pY651 YDDV motifs and Nck SH2 domain) was confirmed by yeast two-hybrid, co-IP, and binary pulldown.","method":"Phosphopeptide pulldown, SILAC quantitative mass spectrometry, yeast two-hybrid, co-immunoprecipitation, binary GST pulldown","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — quantitative proteomics plus multiple orthogonal validation methods for Nck interaction","pmids":["20661443"],"is_preprint":false},{"year":2010,"finding":"ADAP phosphorylation sites Y595, Y625, and Y771 mediate SH2-domain-based interactions with SLP-76 and other TCR proximal signaling proteins as mapped by SILAC and 18O quantitative mass spectrometry using phosphopeptide pulldowns. Novel interaction partner RasGAP was identified at phosphoY595.","method":"Phosphopeptide-agarose pulldown, SILAC quantitative MS, 18O labeling MS","journal":"Journal of proteome research","confidence":"High","confidence_rationale":"Tier 1 / Moderate — two independent quantitative MS methods in parallel, rigorous phospho-specific binding","pmids":["20568816"],"is_preprint":false},{"year":2010,"finding":"HPK1 competes with ADAP for SLP-76 binding. Upon TCR stimulation, HPK1 dampens Rap1 activation, reducing LFA-1 integrin activity. HPK1-deficient T cells show increased ADAP recruitment to SLP-76, elevated Rap1 activation, and increased adhesion to ICAM-1, establishing HPK1 as a negative regulator acting at the ADAP–SLP-76 node.","method":"Co-immunoprecipitation (competition binding), HPK1-/- T cells, Rap1 GTPase assay (pull-down of active Rap1), LFA-1 adhesion assay","journal":"European journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO plus co-IP competition, Rap1 activation assay, single lab","pmids":["20957749"],"is_preprint":false},{"year":2011,"finding":"Two pathways lead to SLP-76-dependent actin rearrangement in T cells: one through the SLP-76 acidic domain (Nck SH2 binding) and another through the SLP-76 SH2 domain (ADAP interaction). ADAP and Nck functionally cooperate to mediate SLP-76–WASp interactions and actin rearrangement; Nck is necessary but insufficient without ADAP.","method":"SLP-76 domain mutants, siRNA knockdown of ADAP and Nck, WASp co-immunoprecipitation, F-actin polymerization assay, confocal microscopy","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — domain mutagenesis, double knockdown, multiple functional assays","pmids":["21536650"],"is_preprint":false},{"year":2011,"finding":"ADAP-mediated integrin regulation requires recruitment of ADAP to the LFA-1 integrin complex through the pleckstrin homology (PH) domain of SKAP55 (specifically R131). The SKAP-ADAP chimera rescues integrin function in ADAP-/- T cells; the R131M PH domain mutation abrogates integrin rescue while paradoxically restoring NF-κB signaling, demonstrating mutually exclusive ADAP pools regulate integrin vs. NF-κB.","method":"SKAP-ADAP chimeric fusion protein, PH domain point mutation (R131M), ADAP-/- T cell reconstitution, LFA-1 co-immunoprecipitation, NF-κB reporter assay, integrin adhesion assay","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — chimera plus point mutant strategy, reciprocal rescue/block of two distinct functions, single lab","pmids":["21525391"],"is_preprint":false},{"year":2010,"finding":"ADAP is critical for NF-κB activation in T cells via two distinct binding sites: one for TAK1 (required for IKK phosphorylation and IKKγ ubiquitination) and one for CARMA1 (required for IKKγ ubiquitination but not IKK phosphorylation). ADAP recruits TAK1 and the CBM complex to PKCθ but is not required for TAK1 activation itself.","method":"ADAP mutants (CARMA1-binding site, TAK1-binding site), co-immunoprecipitation of TAK1/CARMA1/PKCθ complexes, IKK phosphorylation assay, IKKγ ubiquitination assay, NF-κB nuclear translocation assay","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — mutagenesis dissecting two independent binding sites with distinct biochemical readouts, multiple assays","pmids":["20164171"],"is_preprint":false},{"year":2012,"finding":"ADAP deficiency causes a G1-S transition block due to impaired accumulation of Cdk2 and cyclin E. The CARMA1-binding site in ADAP is critical for MKK7 phosphorylation, PKCθ signalosome recruitment, and JNK-mediated Cdk2 induction. Both CARMA1- and TAK1-binding sites in ADAP restrain cyclin E ubiquitination/turnover independently of JNK.","method":"ADAP-/- T cells, ADAP domain mutants (CARMA1/TAK1 sites), cell cycle analysis (flow cytometry), cyclin E ubiquitination assay, MKK7/JNK phosphorylation assay","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO plus domain-specific mutants, multiple molecular and cellular readouts, mechanistic pathway placed","pmids":["22411628"],"is_preprint":false},{"year":2012,"finding":"SLP-76 and ADAP are required for E-selectin-mediated integrin activation and slow leukocyte rolling in neutrophils, promoting ischemia-reperfusion-induced AKI. Specifically, two N-terminal tyrosines and the SH2 domain of SLP-76 are required. Bruton's tyrosine kinase acts downstream of SLP-76, and together with ADAP regulates PI3Kγ- and PLCγ2-dependent integrin affinity and avidity regulation.","method":"Genetically engineered mice (ADAP-/-, SLP-76-/-), transduced Slp76-/- primary leukocytes, intravital microscopy (leukocyte rolling), integrin affinity/avidity assays, pharmacological inhibitors","journal":"The Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple genetic models, domain mapping of SLP-76, intravital functional readout","pmids":["22291096"],"is_preprint":false},{"year":2013,"finding":"In NK cells, a Fyn–ADAP complex exclusively regulates inflammatory cytokine production but not cytotoxicity through a Carma1-Bcl-10-MAP3K7 signaling axis. Cytotoxicity requires Lck, Fyn, PI(3)K, and PLC-γ2 but is ADAP-independent, while cytokine production requires additionally the Fyn-ADAP-Carma1-Bcl-10-MAP3K7 pathway.","method":"ADAP-/- mice, NK cell cytotoxicity assay, cytokine production assay (ELISA/intracellular staining), co-immunoprecipitation of Fyn-ADAP, pharmacological inhibitors for pathway dissection","journal":"Nature immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO, specific NK cell functional readouts distinguishing cytotoxicity vs. cytokine production, co-IP of Fyn-ADAP complex","pmids":["24036998"],"is_preprint":false},{"year":2014,"finding":"ADAP promotes platelet αIIbβ3 activation through novel associations with talin and kindlin-3. GST pulldowns identified distinct ADAP regions for kindlin and talin binding. ADAP-deficient platelets show reduced talin–αIIbβ3 co-localization and reduced irreversible fibrinogen binding. In CHO cells co-expressing αIIbβ3/talin/PAR1/kindlin-3, ADAP associates with the αIIbβ3/talin complex and enables kindlin-3-driven agonist-dependent ligand binding.","method":"GST pulldown (domain mapping), co-immunoprecipitation in platelets, immunofluorescence/proximity ligation assay, ADAP-/- mice, fibrinogen binding assay, CHO cell reconstitution","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Strong — domain pulldowns, proximity ligation, genetic KO, heterologous reconstitution in CHO cells","pmids":["24523237"],"is_preprint":false},{"year":2015,"finding":"The ADAP-SKAP55 module promotes PD-1 expression on CD8+ T cells in a Fyn-, Ca2+-, and NFATc1-dependent manner. ADAP or SKAP55 knockout reduces PD-1 in CD8+ effector T cells; the NFATc1 inhibitor CsA similarly downregulates PD-1 and enhances anti-tumor efficacy, placing ADAP upstream of the NFATc1-PD-1 axis.","method":"ADAP-/- and SKAP55-/- mice, PD-1 surface expression by flow cytometry, tumor prevention/therapeutic models, adoptive transfer, pharmacological inhibition (CsA, Fyn inhibitor, Ca2+ chelation)","journal":"EMBO molecular medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — two independent KOs, multiple pharmacological inhibitors confirming pathway, in vivo functional readout","pmids":["25851535"],"is_preprint":false},{"year":2015,"finding":"ADAP forms a complex with TRAF6 and TAK1 in CD8+ T cells and activates SMAD3 to increase autocrine TGF-β1 production; TGF-β1 then induces CD103 expression via ADAP-, TRAF6-, and SMAD3-dependent signaling. ADAP-/- CD8+ T cells show reduced TGF-β1, CD103, and VLA-1 during influenza infection.","method":"Co-immunoprecipitation of ADAP-TRAF6-TAK1 complex, SMAD3 activation assay, TGF-β1 ELISA, CD103 expression by flow cytometry, ADAP-/- mice with influenza infection model","journal":"PLoS pathogens","confidence":"High","confidence_rationale":"Tier 2 / Strong — complex co-IP, signaling assays, genetic KO with in vivo viral infection model, pathway placed","pmids":["25909459"],"is_preprint":false},{"year":2015,"finding":"Phosphorylation of ADAP at pY571 attracts ZAP70 (via its N-terminal SH2 domain, Kd = 2.3 μM by microscale thermophoresis); this interaction is inducible by TCR or chemokine stimulation. Y571 mutation specifically impairs chemokine-induced T cell migration but does not affect TCR-dependent T cell–APC conjugate formation or adhesion.","method":"Phosphopeptide pulldown, NMR spectroscopy (SH2 domain interaction mapping), microscale thermophoresis (Kd determination), Y571F mutagenesis, T cell migration assay, conjugate/adhesion assay","journal":"Molecular & cellular proteomics","confidence":"High","confidence_rationale":"Tier 1 / Strong — NMR structural mapping, quantitative binding (MST), mutagenesis with specific functional assays","pmids":["26246585"],"is_preprint":false},{"year":2017,"finding":"Ubc9 (SUMO E2 conjugase) directly interacts with ADAP in vitro and in vivo via a nuclear localization sequence (aa 674–700) of ADAP; interaction increases after TCR stimulation. Ubc9 knockdown or expression of Ubc9-binding-deficient ADAP reduces TCR-induced integrin adhesion, LFA-1 clustering, Rac1 activation, and membrane targeting of Rap1/RapL, without affecting TCR proximal signaling or IL-2.","method":"GST pulldown (in vitro direct binding), co-immunoprecipitation in vivo, domain mapping, Ubc9 shRNA knockdown, Rac1 activation assay (pulldown), Rap1/RapL membrane fractionation, LFA-1 clustering assay","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct in vitro binding mapped plus in vivo co-IP, KD plus binding-deficient mutant, multiple functional assays","pmids":["29127148"],"is_preprint":false},{"year":2018,"finding":"ADAP acts as an upstream regulator of SLP-76 microcluster formation; pY595-ADAP enters SLP-76 microclusters while non-phosphorylated ADAP is pre-positioned in actin-rich protrusive structures at contact sites. Multivalent ADAP–SLP-76 SH2 interactions sustain ADAP phosphorylation. ADAP promotes integrin-independent adhesion and CD69 upregulation. A novel phospho-specific antibody confirmed that virtually all ADAP tyrosine phosphorylation is restricted to pY595.","method":"TIRF microscopy, phospho-specific antibody generation, point mutants (Y595F), live cell imaging, integrin-independent adhesion assay, CD69 expression assay","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 2 / Strong — live TIRF imaging, novel phospho-specific antibody, mutagenesis, multiple functional assays","pmids":["30305305"],"is_preprint":false},{"year":2018,"finding":"ADAP deficiency impairs megakaryocyte polarization and causes ectopic proplatelet release into the bone marrow compartment, leading to microthrombocytopenia. ADAP-deficient MKs show reduced spreading on ECM proteins, impaired β1 integrin activation, and defective podosome formation. MK-specific ADAP KO (PF4-Cre) recapitulates the platelet phenotype, confirming an MK-intrinsic defect.","method":"Constitutive and PF4-Cre conditional ADAP KO mice, 3D confocal imaging of sternum, intravital 2-photon microscopy, in vitro MK spreading/podosome assay, β1 integrin activation assay, DMS polarization assay","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional and constitutive KO with in vivo and in vitro assays, MK-intrinsic defect confirmed by lineage-specific KO","pmids":["29950291"],"is_preprint":false},{"year":2021,"finding":"ADAP phosphorylation at Y571 (in the YDSL motif, induced by LPS/TLR4) is required for STAT3 coactivation in macrophages. ADAP interacts with STAT3 and its loss reduces LPS-mediated STAT3 phosphorylation and IL-6-induced STAT3 activation. Y571F mutation abolishes ADAP's stimulating effect on STAT3 and its inhibition of M1-like macrophage polarization.","method":"ADAP-/- macrophages, Y571F mutagenesis, ADAP overexpression, STAT3 phosphorylation assay, co-immunoprecipitation (ADAP-STAT3), cytokine ELISA, macrophage polarization assay","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — KO plus point mutagenesis, co-IP, multiple signaling and functional assays, single lab","pmids":["33431658"],"is_preprint":false},{"year":2022,"finding":"ADAP restrains platelet phagocytosis by macrophages via modulation of STAT1-FcγR signaling. ADAP interacts with STAT1 and competes with STAT1 binding to importin α5, reducing STAT1 nuclear entry. ADAP deficiency potentiates STAT1 nuclear translocation and selectively enhances FcγRI/IV transcription in macrophages.","method":"ADAP-/- mice, macrophage depletion, co-immunoprecipitation (ADAP-STAT1, STAT1-importin α5 competition assay), STAT1 nuclear fractionation, FcγRI/IV transcription analysis, pharmacological STAT1 inhibition","journal":"Cellular & molecular immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO, direct competition co-IP, nuclear fractionation, pharmacological rescue, multiple readouts","pmids":["35637282"],"is_preprint":false},{"year":2024,"finding":"ADAP selectively interacts with and cooperates functionally with RIG-I (but not MDA5) to activate IFN-β transcription in macrophages. ADAP inhibits ISGylation (ISG15 conjugation) of RIG-I; ADAP deficiency increases RIG-I ISGylation, decreases IRF3/TBK1 phosphorylation, and impairs IFN-β induction upon RNA virus infection.","method":"Co-immunoprecipitation (ADAP-RIG-I), ISGylation assay (in vitro/in vivo), ADAP-/- mice, RNA virus infection model, IRF3/TBK1 phosphorylation assay, IFN-β ELISA","journal":"PLoS pathogens","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct co-IP, ISGylation biochemical assay, genetic KO in vitro and in vivo, specific RIG-I vs. MDA5 distinction","pmids":["38776321"],"is_preprint":false},{"year":2025,"finding":"ADAP is required for TLR4-induced upregulation of podoplanin (PDPN) in macrophages. BTK-mediated tyrosine phosphorylation of ADAP at Y571, together with mTOR, converges on STAT3 activation for transactivation of the PDPN promoter. ADAP deficiency prevents generation of a PDPNhi M2-like macrophage subset with enhanced phagocytic activity, exacerbating sepsis.","method":"ADAP-/- mice, ADAP reconstitution, BTK inhibitor, mTOR inhibitor, Y571 mutagenesis, STAT3 phosphorylation assay, PDPN promoter transactivation assay, peritoneal macrophage phenotyping, sepsis model","journal":"JCI insight","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO plus reconstitution, specific Y571 mutagenesis, promoter assay, multiple pharmacological pathway validations","pmids":["39903516"],"is_preprint":false}],"current_model":"FYB1/ADAP is a hematopoietic-specific scaffold adapter that acts downstream of TCR, FcR, and TLR4 signaling: it is phosphorylated primarily at Y595 (and Y651) by FYN-T, creating docking sites for the SLP-76 SH2 domain and for Nck, while its proline-rich region constitutively binds the SKAP55 SH3 domain (stabilizing SKAP55 from proteolysis); the ADAP–SKAP55 module recruits active Rap1 and RIAM to the plasma membrane to drive inside-out integrin (LFA-1, αIIbβ3) activation and clustering, whereas a distinct CARMA1/TAK1-binding domain in ADAP non-redundantly coordinates IKK phosphorylation and IKKγ ubiquitination for NF-κB activation; ADAP also links to the Ena/VASP–WASP–Arp2/3 actin-polymerization machinery, interacts with talin and kindlin-3 in platelets, and in macrophages controls STAT3 and STAT1 nuclear access by direct competition with importin α5, inhibits RIG-I ISGylation to sustain type I interferon responses, and regulates macrophage podoplanin expression through a BTK-Y571(ADAP)-mTOR-STAT3 axis."},"narrative":{"mechanistic_narrative":"FYB1 (FYB/ADAP/SLAP-130) is a hematopoietic-specific cytosolic scaffold adapter that couples antigen- and immune-receptor signaling to integrin activation, actin remodeling, and transcriptional programs [PMID:9207119, PMID:11567141]. It is selectively phosphorylated by the Src kinase FYN-T, principally at Y595 (with Y651), generating docking sites that are bound by the SLP-76 SH2 domain and by Nck; multipoint binding to three SLP-76 sites oligomerizes SLP-76 and is required for SLP-76 microcluster assembly at the immunological synapse [PMID:10409671, PMID:10570256, PMID:23979596, PMID:20661443]. Through its proline-rich region, ADAP constitutively engages the SH3 domain of SKAP55, protecting SKAP55 from proteolysis, and this ADAP/SKAP55 module targets active Rap1 and RIAM to the plasma membrane to drive inside-out activation and clustering of LFA-1, a function genetically dissociable from TCR-induced actin polymerization [PMID:11567141, PMID:15849195, PMID:16980616, PMID:17403904]. A spatially and functionally distinct pool of ADAP coordinates NF-κB activation by recruiting CARMA1 and TAK1 to control IKK phosphorylation and IKKγ ubiquitination, with the integrin-regulatory and NF-κB-regulatory functions assigned to mutually exclusive ADAP pools [PMID:17478723, PMID:21525391, PMID:20164171]. ADAP additionally links SLP-76 to the Ena/VASP–WASP–Arp2/3 actin machinery to drive actin rearrangement during T cell synapse formation and FcR-mediated phagocytosis [PMID:10747096, PMID:11739662, PMID:21536650], and in platelets and megakaryocytes it associates with talin and kindlin-3 to support αIIbβ3 activation and proper proplatelet release [PMID:17003372, PMID:24523237, PMID:29950291]. In macrophages, ADAP governs transcriptional outputs by competing with STAT1 for importin α5 to limit STAT1 nuclear entry, by coactivating STAT3, by restraining RIG-I ISGylation to sustain type I interferon responses, and by driving TLR4-induced podoplanin expression through a BTK–Y571–mTOR–STAT3 axis [PMID:33431658, PMID:35637282, PMID:38776321, PMID:39903516].","teleology":[{"year":1997,"claim":"Established FYB1 as a FYN- and SLP-76-associated phosphoprotein in T cells, defining it as a candidate TCR signaling adapter and raising the question of whether it positively or negatively tunes activation.","evidence":"cDNA cloning, reciprocal co-IP mapping binding to the SLP-76 SH2 domain, and IL-2 reporter/secretion assays in T cell lines","pmids":["9207119","9115214"],"confidence":"High","gaps":["Opposite functional readouts (augmented vs. diminished IL-2) left its regulatory sign ambiguous","No phosphosites mapped","Endogenous loss-of-function not yet tested"]},{"year":1998,"claim":"Identified SKAP55 as a constitutive SH3-domain partner of the ADAP proline-rich region, defining the core ADAP/SKAP55 module.","evidence":"Yeast two-hybrid, co-IP, truncation/point mutant co-transfection in COS cells, and confocal colocalization","pmids":["9671755","9748251"],"confidence":"High","gaps":["Functional consequence of the ADAP–SKAP55 interaction not yet established","Downstream effectors of the module unknown"]},{"year":1999,"claim":"Resolved the FYN-T–ADAP–SLP-76 signaling matrix and mapped the phosphotyrosines (Y595, Y651) that create SLP-76 SH2 docking sites, defining the molecular basis of receptor coupling.","evidence":"In vitro kinase assays, Y→F mutagenesis, co-IP in Jurkat cells, and IL-2/NF-AT reporter assays","pmids":["10409671","10497204","10570256"],"confidence":"High","gaps":["Whether synergy required FYN–ADAP binding was dispensable, narrowing function to the SLP-76 arm","Physiological phenotype still inferred from overexpression"]},{"year":2000,"claim":"Connected ADAP to actin polymerization and integrin signaling, linking the SLP-76 complex to the Ena/VASP–WASP–Arp2/3 machinery and to β1 integrin-driven migration.","evidence":"EVH1 pulldown, co-IP of a SLAP/SLP-76/Nck/VASP/WASP complex, inhibitory peptide competition, and transwell migration assays","pmids":["10747096","10640723","10671560"],"confidence":"High","gaps":["Relationship between actin and integrin outputs not yet separated genetically","Mechanism of integrin avidity change undefined"]},{"year":2001,"claim":"Knockout mice resolved the central question of ADAP function, showing it specifically couples TCR signaling to integrin (LFA-1) clustering and adhesion while being dispensable for TCR-induced actin polymerization.","evidence":"Two independent Fyb/Slap KO mouse lines with proliferation, cytokine, integrin clustering/adhesion, and F-actin assays; parallel FcR studies in mast cells and macrophages","pmids":["11567141","11567140","11553777","11739662","11741310"],"confidence":"High","gaps":["Molecular link from ADAP to integrin avidity not yet identified","Cross-cell-type generalization (mast cell, macrophage) still descriptive"]},{"year":2004,"claim":"Defined the unusual C-terminal architecture of ADAP and dissected the SLP-76-binding YDDV motifs as differential controllers of synapse organization.","evidence":"NMR structure of the helically-extended SH3 (hSH3) fold and YDDV→FDDF (M12) mutagenesis with SMAC imaging and conjugation/IL-2 assays","pmids":["15062083","15477347"],"confidence":"High","gaps":["Ligand of the hSH3 fold unknown at this stage","pSMAC vs conjugation outputs molecularly unexplained"]},{"year":2005,"claim":"Assigned the hSH3 domain a lipid-binding function and showed ADAP stabilizes SKAP55 against proteolysis, explaining the obligate nature of the module.","evidence":"Liposome co-sedimentation and NMR mapping of PIP2/PIP3 binding; pulse-chase protein stability assays with SH3 domain mutants","pmids":["15843031","15849195","16020549","15848169","15933714"],"confidence":"High","gaps":["In vivo relevance of hSH3 lipid binding to membrane targeting not directly tested","Redox (SHP-2) and osteoclast/mAbp1 links from single labs"]},{"year":2007,"claim":"Resolved how the ADAP/SKAP55 module drives inside-out integrin activation, by targeting active Rap1 and RIAM to the plasma membrane without altering Rap1 GTPase activity.","evidence":"Module-disruption mutants, Rap1 membrane fractionation and GTPase assays, RIAM/SKAP55 domain mapping, and gain-of-function membrane targeting in T cells","pmids":["16980616","17403904"],"confidence":"High","gaps":["How the module is itself recruited to the membrane not yet defined","Step coupling Rap1/RIAM to LFA-1 conformational change unresolved"]},{"year":2007,"claim":"Separated ADAP's NF-κB function from its adhesion function, identifying a CARMA1-binding region required for CBM complex assembly and IKK activation.","evidence":"ADAP-/- T cells, CARMA1 co-IP, EMSA, IκB degradation assays, and domain mutagenesis distinguishing adhesion vs NF-κB regions","pmids":["17478723","20164171"],"confidence":"High","gaps":["Whether the two functions use physically distinct ADAP pools not yet shown","TAK1 vs CARMA1 division of labor refined in subsequent work"]},{"year":2010,"claim":"Characterized ADAP as a multivalent phosphotyrosine interaction hub that oligomerizes SLP-76 to nucleate signaling microclusters, and mapped its quantitative interactome.","evidence":"AUC/SPR biophysics of SLP-76 SH2 oligomerization, SILAC/18O phosphopeptide-pulldown mass spectrometry, and confocal microcluster imaging","pmids":["23979596","20661443","20568816","21536650","20957749"],"confidence":"High","gaps":["Functional weight of individual MS-identified partners (RasGAP, PLCγ, PIK3R1) not individually validated","Stoichiometry in vivo not determined"]},{"year":2011,"claim":"Demonstrated that integrin- and NF-κB-regulating ADAP pools are mutually exclusive and that SKAP55's PH domain (R131) recruits ADAP to the LFA-1 complex, mechanistically separating the two outputs.","evidence":"SKAP-ADAP chimera and R131M PH-domain point mutant rescue/block of integrin vs NF-κB in ADAP-/- T cells, plus LFA-1 costimulation assays","pmids":["21525391","19617540"],"confidence":"High","gaps":["Structural basis of PH-domain membrane/LFA-1 engagement not solved","Switch that partitions ADAP between pools unknown"]},{"year":2012,"claim":"Extended ADAP signaling to cell-cycle progression and to neutrophil rolling, showing its NF-κB/JNK arm drives Cdk2/cyclin E and its adhesion arm supports selectin-triggered integrin activation in vivo.","evidence":"ADAP domain mutants with cell-cycle and cyclin E ubiquitination assays; ADAP-/-/SLP-76-/- mice with intravital leukocyte rolling and integrin affinity/avidity measurements","pmids":["22411628","22291096"],"confidence":"High","gaps":["Direct ADAP target controlling cyclin E turnover not identified","BTK–ADAP relationship in neutrophils mechanistically incomplete"]},{"year":2013,"claim":"Showed ADAP functions are receptor- and output-selective, with a Fyn–ADAP–CARMA1–BCL10–MAP3K7 axis controlling NK cytokine production but not cytotoxicity.","evidence":"ADAP-/- mice with separated NK cytotoxicity and cytokine assays, Fyn-ADAP co-IP, and pathway-dissecting inhibitors","pmids":["24036998"],"confidence":"High","gaps":["Why cytotoxicity is ADAP-independent at the molecular level not explained"]},{"year":2014,"claim":"Identified direct ADAP associations with talin and kindlin-3 in platelets, providing the molecular link from ADAP to αIIbβ3 integrin activation.","evidence":"GST pulldown domain mapping, platelet co-IP/proximity ligation, ADAP-/- mice, and CHO-cell reconstitution of αIIbβ3/talin/kindlin-3","pmids":["24523237","19996090","17003372"],"confidence":"High","gaps":["Whether talin/kindlin binding is direct or scaffolded not fully resolved","Spatial coordination with Rap1/RIAM in platelets undefined"]},{"year":2015,"claim":"Established new phospho-dependent ADAP interactions (ZAP70 at pY571) and tied the module to immune-effector transcription (NFATc1/PD-1, TRAF6/SMAD3/CD103).","evidence":"NMR mapping and microscale thermophoresis (ZAP70-pY571 Kd), Y571F migration assays, and ADAP-/-/SKAP55-/- mice with PD-1, TGF-β1, and CD103 readouts plus tumor and influenza models","pmids":["26246585","25851535","25909459"],"confidence":"High","gaps":["How distinct phosphosites (Y571 vs Y595) are differentially used not fully defined","Direct transcriptional mechanism downstream of the module incomplete"]},{"year":2018,"claim":"Refined the phospho-regulatory model, showing virtually all ADAP tyrosine phosphorylation is restricted to Y595 and that ADAP acts upstream of SLP-76 microcluster formation; megakaryocyte-intrinsic ADAP loss causes microthrombocytopenia.","evidence":"TIRF live imaging with a novel pY595-specific antibody and Y595F mutants; constitutive and PF4-Cre conditional ADAP KO mice with 3D bone marrow imaging and MK spreading/podosome assays","pmids":["30305305","29950291"],"confidence":"High","gaps":["Reconciliation of Y595-dominance with earlier multi-site MS data not fully addressed","Megakaryocyte signaling pathway to proplatelet polarization incomplete"]},{"year":2022,"claim":"Revealed a non-canonical nuclear-transport-regulating function of ADAP in macrophages, competing with STAT1 for importin α5 and coactivating STAT3.","evidence":"ADAP-/- macrophages, co-IP/competition assays, nuclear fractionation, FcγR transcription analysis, and Y571F STAT3 coactivation assays","pmids":["35637282","33431658"],"confidence":"High","gaps":["Whether STAT competition occurs in T cells/platelets not tested","Direct ADAP–importin α5 binding interface not mapped"]},{"year":2025,"claim":"Expanded ADAP into innate antiviral and inflammatory transcription, restraining RIG-I ISGylation to sustain IFN-β and driving TLR4-induced podoplanin via a BTK–Y571–mTOR–STAT3 axis.","evidence":"ADAP-RIG-I co-IP and ISGylation assays with ADAP-/- mice and RNA virus infection; ADAP-/- macrophages with BTK/mTOR inhibitors, Y571 mutagenesis, PDPN promoter assays, and a sepsis model","pmids":["38776321","39903516"],"confidence":"High","gaps":["Mechanism by which ADAP inhibits RIG-I ISG15 conjugation not defined","Whether innate functions require the SKAP55/integrin module unknown"]},{"year":null,"claim":"It remains unresolved how a single scaffold partitions between its mutually exclusive integrin-regulatory, NF-κB, actin, and nuclear-transport/transcriptional pools, and what structural switches dictate phosphosite selection across cell types.","evidence":"No timeline discovery resolves the global regulatory logic coordinating ADAP's distinct functional pools","pmids":[],"confidence":"Medium","gaps":["No integrated structural model of full-length ADAP in its complexes","Switch governing Y571 vs Y595 usage across T cells, platelets, macrophages undefined","Quantitative partitioning between integrin, NF-κB, and nuclear pools unmeasured"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,4,30,31]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[21,25,33,48]},{"term_id":"GO:0008289","term_label":"lipid binding","supporting_discovery_ids":[19]},{"term_id":"GO:0008092","term_label":"cytoskeletal protein binding","supporting_discovery_ids":[7,13,34]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[2,25,27]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[25,27,18]},{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[7,13,28]}],"pathway":[{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[0,10,26,39]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[4,25,36]},{"term_id":"R-HSA-109582","term_label":"Hemostasis","supporting_discovery_ids":[24,28,40,46]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[37]}],"complexes":["CARMA1-BCL10-MALT1 (CBM) complex","SLP-76 microcluster/signalosome","ADAP/SKAP55 module"],"partners":["SLP-76","FYN","SKAP55","NCK","RIAM","CARMA1","TAK1","TALIN"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O15117","full_name":"FYN-binding protein 1","aliases":["Adhesion and degranulation promoting adaptor protein","ADAP","FYB-120/130","p120/p130","FYN-T-binding protein","SLAP-130","SLP-76-associated phosphoprotein"],"length_aa":783,"mass_kda":85.4,"function":"Acts as an adapter protein of the FYN and LCP2 signaling cascades in T-cells (By similarity). May play a role in linking T-cell signaling to remodeling of the actin cytoskeleton (PubMed:10747096, PubMed:16980616). Modulates the expression of IL2 (By similarity). Involved in platelet activation (By similarity). Prevents the degradation of SKAP1 and SKAP2 (PubMed:15849195). May be involved in high affinity immunoglobulin epsilon receptor signaling in mast cells (By similarity)","subcellular_location":"Cytoplasm; Nucleus; Cell junction","url":"https://www.uniprot.org/uniprotkb/O15117/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/FYB1","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/FYB1","total_profiled":1310},"omim":[{"mim_id":"602731","title":"FYN-BINDING PROTEIN 1; FYB1","url":"https://www.omim.org/entry/602731"},{"mim_id":"273900","title":"THROMBOCYTOPENIA 3; THC3","url":"https://www.omim.org/entry/273900"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Plasma membrane","reliability":"Approved"},{"location":"Nucleoplasm","reliability":"Additional"}],"tissue_specificity":"Group enriched","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"bone marrow","ntpm":50.1},{"tissue":"lymphoid tissue","ntpm":105.1}],"url":"https://www.proteinatlas.org/search/FYB1"},"hgnc":{"alias_symbol":["SLAP-130","FYB-120/130","ADAP"],"prev_symbol":["FYB"]},"alphafold":{"accession":"O15117","domains":[{"cath_id":"2.30.30.40","chopping":"481-580","consensus_level":"high","plddt":86.8294,"start":481,"end":580},{"cath_id":"2.30.30.40","chopping":"688-763","consensus_level":"high","plddt":89.7504,"start":688,"end":763}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O15117","model_url":"https://alphafold.ebi.ac.uk/files/AF-O15117-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O15117-F1-predicted_aligned_error_v6.png","plddt_mean":56.59},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=FYB1","jax_strain_url":"https://www.jax.org/strain/search?query=FYB1"},"sequence":{"accession":"O15117","fasta_url":"https://rest.uniprot.org/uniprotkb/O15117.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O15117/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O15117"}},"corpus_meta":[{"pmid":"11567141","id":"PMC_11567141","title":"Coupling of the TCR to integrin activation by Slap-130/Fyb.","date":"2001","source":"Science (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/11567141","citation_count":251,"is_preprint":false},{"pmid":"10747096","id":"PMC_10747096","title":"Fyn-binding protein (Fyb)/SLP-76-associated protein (SLAP), Ena/vasodilator-stimulated phosphoprotein (VASP) proteins and the Arp2/3 complex link T cell receptor (TCR) signaling to the actin cytoskeleton.","date":"2000","source":"The Journal of cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/10747096","citation_count":247,"is_preprint":false},{"pmid":"9207119","id":"PMC_9207119","title":"Cloning of a novel T-cell protein FYB that binds FYN and SH2-domain-containing leukocyte protein 76 and modulates interleukin 2 production.","date":"1997","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/9207119","citation_count":236,"is_preprint":false},{"pmid":"11567140","id":"PMC_11567140","title":"Positive regulation of T cell activation and integrin adhesion by the adapter Fyb/Slap.","date":"2001","source":"Science (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/11567140","citation_count":229,"is_preprint":false},{"pmid":"9115214","id":"PMC_9115214","title":"Molecular cloning of SLAP-130, an SLP-76-associated substrate of the T cell antigen receptor-stimulated protein tyrosine kinases.","date":"1997","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/9115214","citation_count":213,"is_preprint":false},{"pmid":"11739662","id":"PMC_11739662","title":"Evidence for a molecular complex consisting of Fyb/SLAP, SLP-76, Nck, VASP and WASP that links the actin cytoskeleton to Fcgamma receptor signalling during phagocytosis.","date":"2001","source":"Journal of cell 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pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/33882129","citation_count":5,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":48259,"output_tokens":13828,"usd":0.176098,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":25606,"output_tokens":6544,"usd":0.145815,"stage2_stop_reason":"end_turn"},"total_usd":0.321913,"stage1_batch_id":"msgbatch_01AsR7g8dGTEiEw9U83bJeWn","stage2_batch_id":"msgbatch_01YV5ZyxtFNUZEjxRcpd9jzb","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1997,\n      \"finding\": \"FYB (FYN binding protein/p120/130) was cloned and shown to associate with the Src kinase p59(fyn) and with SLP-76 via the SLP-76 SH2 domain; it becomes tyrosine-phosphorylated upon TCR/CD3 ligation. Overexpression of FYB augmented IL-2 secretion from a T cell hybridoma in response to TCR ligation.\",\n      \"method\": \"cDNA cloning, co-immunoprecipitation, overexpression in T cell hybridoma\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal co-IP, direct binding mapped to SLP-76 SH2 domain, functional IL-2 assay, foundational paper replicated by multiple subsequent studies\",\n      \"pmids\": [\"9207119\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"SLAP-130 (FYB1) was cloned as a hematopoietic-specific SLP-76-associated phosphoprotein that is a substrate of TCR-induced protein tyrosine kinases; its SH2 domain-mediated association with SLP-76 was demonstrated, and overexpression of SLAP-130 diminished TCR-induced IL-2 promoter activity and interfered with SLP-76-mediated augmentation, suggesting it acts as a negative regulator.\",\n      \"method\": \"Molecular cloning, co-immunoprecipitation (SH2 domain interaction), overexpression in Jurkat T cells with IL-2 promoter reporter assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct binding mapped to SLP-76 SH2 domain, functional reporter assay, replicated by subsequent work\",\n      \"pmids\": [\"9115214\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"FYB binds SKAP55 and the related SKAP55R protein through their SH3 domains (interaction with proline-rich sequences of FYB), identified by yeast two-hybrid screen and confirmed by co-immunoprecipitation; FYB and SKAP55 colocalize in the perinuclear region. Both SKAP55 and SKAP55R serve as substrates for FYN kinase.\",\n      \"method\": \"Yeast two-hybrid screen, co-immunoprecipitation, confocal immunofluorescence microscopy, in vitro kinase assay\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — yeast two-hybrid plus co-IP in T cells, domain mapping, replicated by independent studies\",\n      \"pmids\": [\"9671755\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"SLAP-130 (FYB1) is a component of the Fyn complex in human T cells and co-precipitates with SKAP55. The direct association between SLAP-130 and SKAP55 involves the SH3 domain of SKAP55 and the proline-rich sequence of SLAP-130, established by co-transfection of truncation/point mutants in COS cells and yeast two-hybrid.\",\n      \"method\": \"Co-immunoprecipitation from T cells, co-transfection with truncation mutants in COS cells, yeast two-hybrid\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — domain mapping by mutagenesis, reciprocal co-IP, multiple orthogonal methods\",\n      \"pmids\": [\"9748251\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"FYN-T selectively phosphorylates FYB, creating a template for recruitment of FYN-T and SLP-76 SH2 domains. Co-expression of FYN-T, FYB, and SLP-76 synergistically up-regulates TCR-driven IL-2 transcription, defining a FYN-T–FYB–SLP-76 signaling matrix.\",\n      \"method\": \"In vitro kinase assay, co-immunoprecipitation, overexpression in T cell lines with IL-2 reporter assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — in vitro phosphorylation assay, co-IP, functional IL-2 reporter, consistent with multiple later studies\",\n      \"pmids\": [\"10409671\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"FYB-130 is an alternatively spliced isoform of FYB with a 46-amino-acid insertion near the C-terminus; both FYB-120 and FYB-130 bind SLP-76 SH2 and FYN-T SH2 domains and are phosphorylated by FYN-T. FYB-130 caused a significant increase in TCR-driven NF-AT transcription when co-expressed with FYN-T and SLP-76.\",\n      \"method\": \"cDNA cloning, co-immunoprecipitation, overexpression with NF-AT reporter assay, FISH chromosomal mapping\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — single lab, reciprocal co-IP and functional reporter, two orthogonal methods\",\n      \"pmids\": [\"10497204\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"Tyr595 and Tyr651 of FYB are major phosphorylation sites for FYN-T and mediate binding to the SLP-76 SH2 domain in Jurkat T cells. The synergistic up-regulation of IL-2 promoter activity in the FYN-T–FYB–SLP-76 pathway requires the FYB–SLP-76 interaction (at these tyrosines) but not the FYB–FYN-T interaction.\",\n      \"method\": \"Site-directed mutagenesis (Y→F), co-immunoprecipitation in Jurkat T cells, IL-2 promoter reporter assay\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — mutagenesis plus functional reporter plus co-IP, key phosphosites confirmed by later structural/proteomics studies\",\n      \"pmids\": [\"10570256\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"FYB/SLAP was identified as a ligand for Ena/VASP EVH1 domains. Upon TCR engagement, FYB/SLAP localizes at the T cell–APC interface and associates with Ena/VASP family proteins, WASP, Nck, and SLP-76 in a complex. Inhibition of FYB/SLAP–Ena/VASP binding or WASP–Arp2/3 interaction impairs TCR-dependent actin rearrangement.\",\n      \"method\": \"Pulldown assay (EVH1 domain), co-immunoprecipitation, confocal microscopy (localization at T cell–bead interface), inhibitory peptide competition\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct biochemical pulldown, co-IP complex, live cell localization, functional inhibition, replicated in phagocytosis context\",\n      \"pmids\": [\"10747096\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"SLAP-130/FYB undergoes rapid tyrosine phosphorylation upon α4β1 integrin stimulation and the phosphorylated form associates with the SH2 domain of p59fyn. Overexpression of SLAP-130/FYB in normal T cells enhances migration through fibronectin-coated filters in response to SDF-1α, identifying a role in β1 integrin signaling and T cell motility.\",\n      \"method\": \"Phosphorylation assay, co-immunoprecipitation, overexpression in primary T cells with transwell migration assay\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP and functional migration assay, single lab\",\n      \"pmids\": [\"10640723\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Overexpression of SLAP-130 abrogates SLP-76-mediated augmentation of NFAT/AP1 activity; Tyr559 of SLAP-130 is critical for SLP-76 association, and mutation of this residue diminishes SLAP-130's negative regulatory effect on SLP-76 function, specifically through ERK activation but not PLCγ1 phosphorylation.\",\n      \"method\": \"Deletion and point mutagenesis, co-transfection in SLP-76-deficient Jurkat cells, NFAT/AP1 reporter assay, phosphorylation analysis\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mutagenesis identifying critical tyrosine, functional rescue in SLP-76-deficient cells, multiple readouts\",\n      \"pmids\": [\"10671560\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"T cells from SLAP-130/Fyb knockout mice show markedly impaired proliferation after CD3 engagement. TCR fails to enhance integrin-dependent adhesion and LFA-1 clustering is defective, while TCR-induced actin polymerization is normal. This places SLAP-130/Fyb as coupling TCR-mediated actin rearrangement with integrin (LFA-1) clustering/activation.\",\n      \"method\": \"Genetic knockout mice, T cell proliferation assay, integrin adhesion assay, LFA-1 clustering assay (flow cytometry/microscopy), actin polymerization assay\",\n      \"journal\": \"Science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO with multiple specific cellular phenotype readouts, published simultaneously with independent replication\",\n      \"pmids\": [\"11567141\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Fyb/Slap-deficient T cells exhibit defective proliferation, cytokine production, and TCR-induced integrin clustering and adhesion; Fyb/Slap has no apparent role in F-actin polymerization or TCR clustering. Fyb/Slap is the first adapter shown to specifically couple TCR stimulation to integrin avidity modulation.\",\n      \"method\": \"Genetic knockout mice, proliferation assay, cytokine ELISA, integrin clustering assay, F-actin assay, in vivo immune response assay\",\n      \"journal\": \"Science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO, multiple orthogonal assays, independent replication in same issue\",\n      \"pmids\": [\"11567140\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Upon FcεRI aggregation on mast cells, FYB becomes tyrosine-phosphorylated and colocalizes with F-actin in membrane ruffles. FYB up-regulates β1 integrin-mediated adhesion to fibronectin and mediator (β-hexosaminidase) release; the FYB SH3 domain is required for mediator release but not adhesion, distinguishing two functional outputs.\",\n      \"method\": \"Overexpression in RBL-2H3 mast cells, phosphorylation assay, adhesion assay, degranulation assay (β-hexosaminidase), confocal microscopy, SH3 domain deletion mutants\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — domain mutagenesis (SH3 deletion) dissecting two functions, multiple assays, single lab\",\n      \"pmids\": [\"11553777\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Upon Fcγ receptor engagement during phagocytosis in macrophages, a large molecular complex containing Fyb/SLAP, SLP-76, Nck, Ena/VASP proteins, and WASP is formed. Fyb/SLAP recruits VASP and profilin to the phagocytic cup, coordinating actin polymerization for pseudopod extension and particle internalization.\",\n      \"method\": \"Co-immunoprecipitation from macrophages, immunofluorescence microscopy at phagocytic cup, functional phagocytosis assay\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — complex formation by co-IP, spatial localization at phagocytic cup, functional rescue, consistent with T cell findings\",\n      \"pmids\": [\"11739662\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"ADAP (FYB) promotes β1 integrin clustering kinetics on mast cells selectively; FcεRI receptor clustering was unaffected by ADAP overexpression, indicating specificity for integrins.\",\n      \"method\": \"Overexpression in mast cells, integrin clustering assay by flow cytometry/microscopy, receptor clustering controls\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — single OE experiment with specificity controls, single lab\",\n      \"pmids\": [\"11741310\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"The Yersinia tyrosine phosphatase YopH targets Fyb (FYB1) in macrophages; YopH binds Fyb in both phosphotyrosine-dependent (N-terminal YopH substrate-binding domain and C-terminal catalytic region) and phosphotyrosine-independent (central YopH region with Fyb C-terminus) manners. Dephosphorylation of Fyb by YopH contributes to blockage of phagocytosis and cytotoxic effects on macrophages.\",\n      \"method\": \"YopH mutant analysis, GST pulldown, co-immunoprecipitation in infected cells, phagocytosis assay, YopH localization assay\",\n      \"journal\": \"Cellular microbiology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mutagenesis of YopH binding domains, functional phagocytosis assay, consistent with follow-up study\",\n      \"pmids\": [\"12542470\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"In mast cells, SLAP-130 and SKAP55 are the major MIST-associated phosphoproteins. MIST directly associates with SLAP-130 via MIST's SH2 domain; collaboration of SLAP-130 with SKAP55 recruits MIST to Lyn. SLAP-130/SKAP55 show higher affinity binding to Fyn-SH2 than Lyn-SH2, preferentially targeting MIST to Fyn.\",\n      \"method\": \"Co-immunoprecipitation in mast cell lines, pulldown, SH2 domain binding assay\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct SH2 binding mapped, co-IP in mast cells, single lab\",\n      \"pmids\": [\"12681493\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"The C-terminal domain of ADAP was solved by NMR spectroscopy as an altered SH3 fold (helically extended SH3, hSH3) in which an N-terminal amphipathic helix makes contacts to the regular SH3 scaffold. The hSH3 domain cannot bind conventional proline-rich peptides, distinguishing it functionally from canonical SH3 domains.\",\n      \"method\": \"NMR structure determination, proline-rich peptide binding assay\",\n      \"journal\": \"Structure\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — atomic resolution NMR structure with functional validation (peptide binding), single lab\",\n      \"pmids\": [\"15062083\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"ADAP-SLP-76 binding (via YDDV motifs) differentially regulates pSMAC formation at the immunological synapse versus T cell–APC conjugation. Mutation of YDDV sites (M12) prevents LFA-1 clustering and conjugation enhancement but acts as a dominant negative specifically for pSMAC formation and IL-2 production. ADAP colocalizes with LFA-1 at the immunological synapse.\",\n      \"method\": \"Mutagenesis (YDDV→FDDF, M12), confocal microscopy (SMAC imaging), conjugation assay, LFA-1 clustering assay, IL-2 production assay\",\n      \"journal\": \"The Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mutagenesis dissecting two functions, multiple orthogonal assays, single lab\",\n      \"pmids\": [\"15477347\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"The hSH3 domain of ADAP binds acidic lipids including phosphatidylinositides (PIP2, PIP3) preferentially over monovalent PS; binding is dependent on the N-terminal helix of the hSH3 domain and basic surface patches. This identifies the hSH3 domain as a lipid interaction module.\",\n      \"method\": \"Lipid binding assay (liposome co-sedimentation), NMR chemical shift mapping, mutagenesis of basic residues\",\n      \"journal\": \"Journal of molecular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reconstitution plus NMR mapping, multiple lipid substrates tested, single lab\",\n      \"pmids\": [\"15843031\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"ADAP interacts with c-Src in osteoclast precursors; c-Src kinase activity and SH2 domain are required for the association, with Tyr807 in ADAP identified as the major recognition site. ADAP is expressed in prefusion osteoclasts and localizes to lamellipodia leading edges. ADAP knockdown impairs migration and multinucleated cell formation in RAW264 cells.\",\n      \"method\": \"GST pulldown combined with mass spectrometry, co-immunoprecipitation, mutagenesis (Y807), ADAP knockdown (siRNA), migration assay, multinucleated cell formation assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — domain mapping by mutagenesis, co-IP, functional KD assay, single lab\",\n      \"pmids\": [\"16020549\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"In the absence of ADAP, SKAP55 protein is rapidly degraded (half-life ~15–20 min vs. ~90 min with ADAP). ADAP protects SKAP55 from proteolysis via the SKAP55 SH3 domain interaction with ADAP; inactivating SKAP55's SH3 domain blocks this protective effect.\",\n      \"method\": \"ADAP-deficient Jurkat line with ADAP reconstitution, pulse-chase/proteolysis assay, SH3 domain mutants\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — pulse-chase quantification of protein stability, domain mutagenesis, ADAP reconstitution rescue, single lab\",\n      \"pmids\": [\"15849195\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Fyb (FYB1) interacts with mammalian actin binding protein 1 (mAbp1) via the mAbp1 SH3 domain binding the Fyb N-terminal region. The interaction is detected in macrophage lysates and the proteins co-localize with F-actin at the leading edge.\",\n      \"method\": \"Yeast two-hybrid screen (Fyb domains as bait), co-immunoprecipitation from macrophage lysates, co-localization by immunofluorescence\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — two-hybrid plus co-IP plus co-localization, single lab, domain interaction mapped\",\n      \"pmids\": [\"15848169\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"TCR-stimulated ROS generation leads to transient inactivation/oxidation of SHP-2 (but not SHP-1), which directly regulates phosphorylation of Vav1 and ADAP. The ADAP–SLP-76 association is regulated by SHP-2 in a redox-dependent manner, promoting T cell adhesion through an SLP-76-dependent pathway to integrin activation.\",\n      \"method\": \"ROS assay, PTP oxidation assay, co-immunoprecipitation, phosphorylation analysis, SHP-2 knockdown/inhibition\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct SHP-2 regulation of ADAP phosphorylation demonstrated biochemically, redox-dependent co-IP, single lab\",\n      \"pmids\": [\"15933714\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"ADAP is required for normal αIIbβ3 activation by VWF/GP Ib-IX-V and other agonists (ADP, PAR4) in platelets. ADAP stabilizes SKAP-HOM expression via its SH3 domain interaction, but SKAP-HOM is not required for αIIbβ3 activation. ADAP-deficient mice show increased rebleeding, establishing ADAP as a component of platelet inside-out signaling.\",\n      \"method\": \"ADAP-/- mice, fibrinogen/ligand-mimetic Fab binding assay, shear-flow adhesion assay, tail-bleeding assay, SKAP-HOM-/- comparison\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO, multiple agonist conditions, in vivo bleeding assay, comparison with SKAP-HOM-/- controls\",\n      \"pmids\": [\"17003372\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"The ADAP/SKAP55 signaling module regulates TCR-mediated integrin activation through plasma membrane targeting of activated Rap1. Disruption of the ADAP/SKAP55 interaction displaces Rap1 from the plasma membrane without affecting Rap1 GTPase activity. Membrane targeting of the ADAP/SKAP55 module induces T cell adhesion even without TCR stimulation.\",\n      \"method\": \"Mutagenesis disrupting ADAP/SKAP55 interaction, Rap1 membrane fractionation, Rap1 GTPase assay, retroviral reconstitution, adhesion assay\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — domain disruption mutants, subcellular fractionation, GTPase assay, gain-of-function membrane targeting, single lab\",\n      \"pmids\": [\"16980616\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"ADAP regulates TCR-mediated NF-κB activation by associating with the CARMA1 adapter. ADAP-deficient T cells show impaired NF-κB nuclear translocation, reduced IκB phosphorylation/degradation, and impaired CARMA1-BCL10-MALT1 complex assembly. A distinct region of ADAP is required for CARMA1 association and NF-κB activation, separate from the adhesion-regulatory domain.\",\n      \"method\": \"ADAP-/- mice, NF-κB nuclear translocation assay (EMSA), IκB phosphorylation/degradation assay, CBM complex assembly assay, co-immunoprecipitation, domain mutagenesis\",\n      \"journal\": \"Science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO, multiple NF-κB assays, domain-specific mutagenesis dissecting adhesion vs NF-κB functions, single lab\",\n      \"pmids\": [\"17478723\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"RIAM constitutively interacts with SKAP-55 and is a key component linking the ADAP/SKAP-55 module to active Rap1. The ADAP/SKAP-55 module relocates RIAM and Rap1 to the plasma membrane following TCR activation. The SKAP-55/RIAM complex is essential for TCR-mediated adhesion and T cell–APC conjugate formation.\",\n      \"method\": \"Co-immunoprecipitation in primary T cells and transfection system, domain mapping of SKAP-55/RIAM interaction, subcellular fractionation, adhesion assay, conjugate formation assay\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — co-IP in primary cells, domain mapping, membrane fractionation, functional adhesion assay\",\n      \"pmids\": [\"17403904\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"ADAP is an essential component of outside-in αIIbβ3 signaling in platelets under shear flow. ADAP-/- platelets show reduced spreading and unstable thrombi under shear but not under static conditions. ADAP-sufficient platelets form F-actin–rich structures co-localizing with SLP-76 and phospho-Vav1 under shear; ADAP-/- platelets fail to form these structures. VASP- or SKAP-HOM-deficient platelets do not share this phenotype.\",\n      \"method\": \"ADAP-/- mice, shear-flow platelet spreading assay, ex vivo thrombus formation, F-actin microscopy, comparison with VASP-/- and SKAP-HOM-/- mice\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO, specific shear-flow condition, specificity shown by negative results with VASP/SKAP-HOM KOs\",\n      \"pmids\": [\"19996090\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"The SLP-76–ADAP binding module is required for LFA-1-mediated outside-in costimulation of IL-2, F-actin clustering, T cell polarization, and motility. ADAP expression with LFA-1 ligation alone is sufficient to polarize T cells and increase motility; the M12 ADAP mutant (lacking SLP-76-binding sites) blocks LFA-1 costimulation of all these events. LFA-1–ADAP polarization depends on Src kinases, Rho GTPases, PLC, and PI3K.\",\n      \"method\": \"ADAP-/- T cells, ADAP M12 mutant, LFA-1 ligation assay, F-actin clustering (microscopy), polarization assay, T cell motility assay, pharmacological inhibitors\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO plus dominant-negative mutant, multiple assays, gain-of-function LFA-1 polarization\",\n      \"pmids\": [\"19617540\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"ADAP contains three SLP-76 SH2 domain binding sites; multipoint binding to ADAP oligomerizes the SLP-76 SH2 domain in vitro and is critical for SLP-76 microcluster assembly in T cells. Biophysical methods (AUC, SPR) quantified oligomerization, and confocal imaging confirmed all three sites are required for full microcluster formation.\",\n      \"method\": \"Analytical ultracentrifugation (AUC), SPR biophysics, mutagenesis of ADAP binding sites, confocal imaging of SLP-76 microclusters, T cell functional assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — in vitro reconstitution with biophysical measurement plus cell imaging plus mutagenesis\",\n      \"pmids\": [\"23979596\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"ADAP is a phosphotyrosine-dependent interaction hub: peptide pulldown with SILAC mass spectrometry identified SLP-76, PLCγ, PIK3R1, Nck, CRK, Gads, and RasGAP as phospho-dependent binding partners of the central YDDV motif of ADAP. The ADAP–Nck interaction (via pY595/pY651 YDDV motifs and Nck SH2 domain) was confirmed by yeast two-hybrid, co-IP, and binary pulldown.\",\n      \"method\": \"Phosphopeptide pulldown, SILAC quantitative mass spectrometry, yeast two-hybrid, co-immunoprecipitation, binary GST pulldown\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — quantitative proteomics plus multiple orthogonal validation methods for Nck interaction\",\n      \"pmids\": [\"20661443\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"ADAP phosphorylation sites Y595, Y625, and Y771 mediate SH2-domain-based interactions with SLP-76 and other TCR proximal signaling proteins as mapped by SILAC and 18O quantitative mass spectrometry using phosphopeptide pulldowns. Novel interaction partner RasGAP was identified at phosphoY595.\",\n      \"method\": \"Phosphopeptide-agarose pulldown, SILAC quantitative MS, 18O labeling MS\",\n      \"journal\": \"Journal of proteome research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — two independent quantitative MS methods in parallel, rigorous phospho-specific binding\",\n      \"pmids\": [\"20568816\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"HPK1 competes with ADAP for SLP-76 binding. Upon TCR stimulation, HPK1 dampens Rap1 activation, reducing LFA-1 integrin activity. HPK1-deficient T cells show increased ADAP recruitment to SLP-76, elevated Rap1 activation, and increased adhesion to ICAM-1, establishing HPK1 as a negative regulator acting at the ADAP–SLP-76 node.\",\n      \"method\": \"Co-immunoprecipitation (competition binding), HPK1-/- T cells, Rap1 GTPase assay (pull-down of active Rap1), LFA-1 adhesion assay\",\n      \"journal\": \"European journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO plus co-IP competition, Rap1 activation assay, single lab\",\n      \"pmids\": [\"20957749\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Two pathways lead to SLP-76-dependent actin rearrangement in T cells: one through the SLP-76 acidic domain (Nck SH2 binding) and another through the SLP-76 SH2 domain (ADAP interaction). ADAP and Nck functionally cooperate to mediate SLP-76–WASp interactions and actin rearrangement; Nck is necessary but insufficient without ADAP.\",\n      \"method\": \"SLP-76 domain mutants, siRNA knockdown of ADAP and Nck, WASp co-immunoprecipitation, F-actin polymerization assay, confocal microscopy\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — domain mutagenesis, double knockdown, multiple functional assays\",\n      \"pmids\": [\"21536650\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"ADAP-mediated integrin regulation requires recruitment of ADAP to the LFA-1 integrin complex through the pleckstrin homology (PH) domain of SKAP55 (specifically R131). The SKAP-ADAP chimera rescues integrin function in ADAP-/- T cells; the R131M PH domain mutation abrogates integrin rescue while paradoxically restoring NF-κB signaling, demonstrating mutually exclusive ADAP pools regulate integrin vs. NF-κB.\",\n      \"method\": \"SKAP-ADAP chimeric fusion protein, PH domain point mutation (R131M), ADAP-/- T cell reconstitution, LFA-1 co-immunoprecipitation, NF-κB reporter assay, integrin adhesion assay\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — chimera plus point mutant strategy, reciprocal rescue/block of two distinct functions, single lab\",\n      \"pmids\": [\"21525391\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"ADAP is critical for NF-κB activation in T cells via two distinct binding sites: one for TAK1 (required for IKK phosphorylation and IKKγ ubiquitination) and one for CARMA1 (required for IKKγ ubiquitination but not IKK phosphorylation). ADAP recruits TAK1 and the CBM complex to PKCθ but is not required for TAK1 activation itself.\",\n      \"method\": \"ADAP mutants (CARMA1-binding site, TAK1-binding site), co-immunoprecipitation of TAK1/CARMA1/PKCθ complexes, IKK phosphorylation assay, IKKγ ubiquitination assay, NF-κB nuclear translocation assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mutagenesis dissecting two independent binding sites with distinct biochemical readouts, multiple assays\",\n      \"pmids\": [\"20164171\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"ADAP deficiency causes a G1-S transition block due to impaired accumulation of Cdk2 and cyclin E. The CARMA1-binding site in ADAP is critical for MKK7 phosphorylation, PKCθ signalosome recruitment, and JNK-mediated Cdk2 induction. Both CARMA1- and TAK1-binding sites in ADAP restrain cyclin E ubiquitination/turnover independently of JNK.\",\n      \"method\": \"ADAP-/- T cells, ADAP domain mutants (CARMA1/TAK1 sites), cell cycle analysis (flow cytometry), cyclin E ubiquitination assay, MKK7/JNK phosphorylation assay\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO plus domain-specific mutants, multiple molecular and cellular readouts, mechanistic pathway placed\",\n      \"pmids\": [\"22411628\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"SLP-76 and ADAP are required for E-selectin-mediated integrin activation and slow leukocyte rolling in neutrophils, promoting ischemia-reperfusion-induced AKI. Specifically, two N-terminal tyrosines and the SH2 domain of SLP-76 are required. Bruton's tyrosine kinase acts downstream of SLP-76, and together with ADAP regulates PI3Kγ- and PLCγ2-dependent integrin affinity and avidity regulation.\",\n      \"method\": \"Genetically engineered mice (ADAP-/-, SLP-76-/-), transduced Slp76-/- primary leukocytes, intravital microscopy (leukocyte rolling), integrin affinity/avidity assays, pharmacological inhibitors\",\n      \"journal\": \"The Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple genetic models, domain mapping of SLP-76, intravital functional readout\",\n      \"pmids\": [\"22291096\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"In NK cells, a Fyn–ADAP complex exclusively regulates inflammatory cytokine production but not cytotoxicity through a Carma1-Bcl-10-MAP3K7 signaling axis. Cytotoxicity requires Lck, Fyn, PI(3)K, and PLC-γ2 but is ADAP-independent, while cytokine production requires additionally the Fyn-ADAP-Carma1-Bcl-10-MAP3K7 pathway.\",\n      \"method\": \"ADAP-/- mice, NK cell cytotoxicity assay, cytokine production assay (ELISA/intracellular staining), co-immunoprecipitation of Fyn-ADAP, pharmacological inhibitors for pathway dissection\",\n      \"journal\": \"Nature immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO, specific NK cell functional readouts distinguishing cytotoxicity vs. cytokine production, co-IP of Fyn-ADAP complex\",\n      \"pmids\": [\"24036998\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"ADAP promotes platelet αIIbβ3 activation through novel associations with talin and kindlin-3. GST pulldowns identified distinct ADAP regions for kindlin and talin binding. ADAP-deficient platelets show reduced talin–αIIbβ3 co-localization and reduced irreversible fibrinogen binding. In CHO cells co-expressing αIIbβ3/talin/PAR1/kindlin-3, ADAP associates with the αIIbβ3/talin complex and enables kindlin-3-driven agonist-dependent ligand binding.\",\n      \"method\": \"GST pulldown (domain mapping), co-immunoprecipitation in platelets, immunofluorescence/proximity ligation assay, ADAP-/- mice, fibrinogen binding assay, CHO cell reconstitution\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — domain pulldowns, proximity ligation, genetic KO, heterologous reconstitution in CHO cells\",\n      \"pmids\": [\"24523237\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"The ADAP-SKAP55 module promotes PD-1 expression on CD8+ T cells in a Fyn-, Ca2+-, and NFATc1-dependent manner. ADAP or SKAP55 knockout reduces PD-1 in CD8+ effector T cells; the NFATc1 inhibitor CsA similarly downregulates PD-1 and enhances anti-tumor efficacy, placing ADAP upstream of the NFATc1-PD-1 axis.\",\n      \"method\": \"ADAP-/- and SKAP55-/- mice, PD-1 surface expression by flow cytometry, tumor prevention/therapeutic models, adoptive transfer, pharmacological inhibition (CsA, Fyn inhibitor, Ca2+ chelation)\",\n      \"journal\": \"EMBO molecular medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — two independent KOs, multiple pharmacological inhibitors confirming pathway, in vivo functional readout\",\n      \"pmids\": [\"25851535\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"ADAP forms a complex with TRAF6 and TAK1 in CD8+ T cells and activates SMAD3 to increase autocrine TGF-β1 production; TGF-β1 then induces CD103 expression via ADAP-, TRAF6-, and SMAD3-dependent signaling. ADAP-/- CD8+ T cells show reduced TGF-β1, CD103, and VLA-1 during influenza infection.\",\n      \"method\": \"Co-immunoprecipitation of ADAP-TRAF6-TAK1 complex, SMAD3 activation assay, TGF-β1 ELISA, CD103 expression by flow cytometry, ADAP-/- mice with influenza infection model\",\n      \"journal\": \"PLoS pathogens\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — complex co-IP, signaling assays, genetic KO with in vivo viral infection model, pathway placed\",\n      \"pmids\": [\"25909459\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Phosphorylation of ADAP at pY571 attracts ZAP70 (via its N-terminal SH2 domain, Kd = 2.3 μM by microscale thermophoresis); this interaction is inducible by TCR or chemokine stimulation. Y571 mutation specifically impairs chemokine-induced T cell migration but does not affect TCR-dependent T cell–APC conjugate formation or adhesion.\",\n      \"method\": \"Phosphopeptide pulldown, NMR spectroscopy (SH2 domain interaction mapping), microscale thermophoresis (Kd determination), Y571F mutagenesis, T cell migration assay, conjugate/adhesion assay\",\n      \"journal\": \"Molecular & cellular proteomics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — NMR structural mapping, quantitative binding (MST), mutagenesis with specific functional assays\",\n      \"pmids\": [\"26246585\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Ubc9 (SUMO E2 conjugase) directly interacts with ADAP in vitro and in vivo via a nuclear localization sequence (aa 674–700) of ADAP; interaction increases after TCR stimulation. Ubc9 knockdown or expression of Ubc9-binding-deficient ADAP reduces TCR-induced integrin adhesion, LFA-1 clustering, Rac1 activation, and membrane targeting of Rap1/RapL, without affecting TCR proximal signaling or IL-2.\",\n      \"method\": \"GST pulldown (in vitro direct binding), co-immunoprecipitation in vivo, domain mapping, Ubc9 shRNA knockdown, Rac1 activation assay (pulldown), Rap1/RapL membrane fractionation, LFA-1 clustering assay\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct in vitro binding mapped plus in vivo co-IP, KD plus binding-deficient mutant, multiple functional assays\",\n      \"pmids\": [\"29127148\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"ADAP acts as an upstream regulator of SLP-76 microcluster formation; pY595-ADAP enters SLP-76 microclusters while non-phosphorylated ADAP is pre-positioned in actin-rich protrusive structures at contact sites. Multivalent ADAP–SLP-76 SH2 interactions sustain ADAP phosphorylation. ADAP promotes integrin-independent adhesion and CD69 upregulation. A novel phospho-specific antibody confirmed that virtually all ADAP tyrosine phosphorylation is restricted to pY595.\",\n      \"method\": \"TIRF microscopy, phospho-specific antibody generation, point mutants (Y595F), live cell imaging, integrin-independent adhesion assay, CD69 expression assay\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — live TIRF imaging, novel phospho-specific antibody, mutagenesis, multiple functional assays\",\n      \"pmids\": [\"30305305\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"ADAP deficiency impairs megakaryocyte polarization and causes ectopic proplatelet release into the bone marrow compartment, leading to microthrombocytopenia. ADAP-deficient MKs show reduced spreading on ECM proteins, impaired β1 integrin activation, and defective podosome formation. MK-specific ADAP KO (PF4-Cre) recapitulates the platelet phenotype, confirming an MK-intrinsic defect.\",\n      \"method\": \"Constitutive and PF4-Cre conditional ADAP KO mice, 3D confocal imaging of sternum, intravital 2-photon microscopy, in vitro MK spreading/podosome assay, β1 integrin activation assay, DMS polarization assay\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional and constitutive KO with in vivo and in vitro assays, MK-intrinsic defect confirmed by lineage-specific KO\",\n      \"pmids\": [\"29950291\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"ADAP phosphorylation at Y571 (in the YDSL motif, induced by LPS/TLR4) is required for STAT3 coactivation in macrophages. ADAP interacts with STAT3 and its loss reduces LPS-mediated STAT3 phosphorylation and IL-6-induced STAT3 activation. Y571F mutation abolishes ADAP's stimulating effect on STAT3 and its inhibition of M1-like macrophage polarization.\",\n      \"method\": \"ADAP-/- macrophages, Y571F mutagenesis, ADAP overexpression, STAT3 phosphorylation assay, co-immunoprecipitation (ADAP-STAT3), cytokine ELISA, macrophage polarization assay\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — KO plus point mutagenesis, co-IP, multiple signaling and functional assays, single lab\",\n      \"pmids\": [\"33431658\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"ADAP restrains platelet phagocytosis by macrophages via modulation of STAT1-FcγR signaling. ADAP interacts with STAT1 and competes with STAT1 binding to importin α5, reducing STAT1 nuclear entry. ADAP deficiency potentiates STAT1 nuclear translocation and selectively enhances FcγRI/IV transcription in macrophages.\",\n      \"method\": \"ADAP-/- mice, macrophage depletion, co-immunoprecipitation (ADAP-STAT1, STAT1-importin α5 competition assay), STAT1 nuclear fractionation, FcγRI/IV transcription analysis, pharmacological STAT1 inhibition\",\n      \"journal\": \"Cellular & molecular immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO, direct competition co-IP, nuclear fractionation, pharmacological rescue, multiple readouts\",\n      \"pmids\": [\"35637282\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"ADAP selectively interacts with and cooperates functionally with RIG-I (but not MDA5) to activate IFN-β transcription in macrophages. ADAP inhibits ISGylation (ISG15 conjugation) of RIG-I; ADAP deficiency increases RIG-I ISGylation, decreases IRF3/TBK1 phosphorylation, and impairs IFN-β induction upon RNA virus infection.\",\n      \"method\": \"Co-immunoprecipitation (ADAP-RIG-I), ISGylation assay (in vitro/in vivo), ADAP-/- mice, RNA virus infection model, IRF3/TBK1 phosphorylation assay, IFN-β ELISA\",\n      \"journal\": \"PLoS pathogens\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct co-IP, ISGylation biochemical assay, genetic KO in vitro and in vivo, specific RIG-I vs. MDA5 distinction\",\n      \"pmids\": [\"38776321\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ADAP is required for TLR4-induced upregulation of podoplanin (PDPN) in macrophages. BTK-mediated tyrosine phosphorylation of ADAP at Y571, together with mTOR, converges on STAT3 activation for transactivation of the PDPN promoter. ADAP deficiency prevents generation of a PDPNhi M2-like macrophage subset with enhanced phagocytic activity, exacerbating sepsis.\",\n      \"method\": \"ADAP-/- mice, ADAP reconstitution, BTK inhibitor, mTOR inhibitor, Y571 mutagenesis, STAT3 phosphorylation assay, PDPN promoter transactivation assay, peritoneal macrophage phenotyping, sepsis model\",\n      \"journal\": \"JCI insight\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO plus reconstitution, specific Y571 mutagenesis, promoter assay, multiple pharmacological pathway validations\",\n      \"pmids\": [\"39903516\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"FYB1/ADAP is a hematopoietic-specific scaffold adapter that acts downstream of TCR, FcR, and TLR4 signaling: it is phosphorylated primarily at Y595 (and Y651) by FYN-T, creating docking sites for the SLP-76 SH2 domain and for Nck, while its proline-rich region constitutively binds the SKAP55 SH3 domain (stabilizing SKAP55 from proteolysis); the ADAP–SKAP55 module recruits active Rap1 and RIAM to the plasma membrane to drive inside-out integrin (LFA-1, αIIbβ3) activation and clustering, whereas a distinct CARMA1/TAK1-binding domain in ADAP non-redundantly coordinates IKK phosphorylation and IKKγ ubiquitination for NF-κB activation; ADAP also links to the Ena/VASP–WASP–Arp2/3 actin-polymerization machinery, interacts with talin and kindlin-3 in platelets, and in macrophages controls STAT3 and STAT1 nuclear access by direct competition with importin α5, inhibits RIG-I ISGylation to sustain type I interferon responses, and regulates macrophage podoplanin expression through a BTK-Y571(ADAP)-mTOR-STAT3 axis.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"FYB1 (FYB/ADAP/SLAP-130) is a hematopoietic-specific cytosolic scaffold adapter that couples antigen- and immune-receptor signaling to integrin activation, actin remodeling, and transcriptional programs [#0, #10]. It is selectively phosphorylated by the Src kinase FYN-T, principally at Y595 (with Y651), generating docking sites that are bound by the SLP-76 SH2 domain and by Nck; multipoint binding to three SLP-76 sites oligomerizes SLP-76 and is required for SLP-76 microcluster assembly at the immunological synapse [#4, #6, #30, #31]. Through its proline-rich region, ADAP constitutively engages the SH3 domain of SKAP55, protecting SKAP55 from proteolysis, and this ADAP/SKAP55 module targets active Rap1 and RIAM to the plasma membrane to drive inside-out activation and clustering of LFA-1, a function genetically dissociable from TCR-induced actin polymerization [#10, #21, #25, #27]. A spatially and functionally distinct pool of ADAP coordinates NF-\\u03baB activation by recruiting CARMA1 and TAK1 to control IKK phosphorylation and IKK\\u03b3 ubiquitination, with the integrin-regulatory and NF-\\u03baB-regulatory functions assigned to mutually exclusive ADAP pools [#26, #35, #36]. ADAP additionally links SLP-76 to the Ena/VASP\\u2013WASP\\u2013Arp2/3 actin machinery to drive actin rearrangement during T cell synapse formation and FcR-mediated phagocytosis [#7, #13, #34], and in platelets and megakaryocytes it associates with talin and kindlin-3 to support \\u03b1IIb\\u03b23 activation and proper proplatelet release [#24, #40, #46]. In macrophages, ADAP governs transcriptional outputs by competing with STAT1 for importin \\u03b15 to limit STAT1 nuclear entry, by coactivating STAT3, by restraining RIG-I ISGylation to sustain type I interferon responses, and by driving TLR4-induced podoplanin expression through a BTK\\u2013Y571\\u2013mTOR\\u2013STAT3 axis [#47, #48, #49, #50].\",\n  \"teleology\": [\n    {\n      \"year\": 1997,\n      \"claim\": \"Established FYB1 as a FYN- and SLP-76-associated phosphoprotein in T cells, defining it as a candidate TCR signaling adapter and raising the question of whether it positively or negatively tunes activation.\",\n      \"evidence\": \"cDNA cloning, reciprocal co-IP mapping binding to the SLP-76 SH2 domain, and IL-2 reporter/secretion assays in T cell lines\",\n      \"pmids\": [\"9207119\", \"9115214\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Opposite functional readouts (augmented vs. diminished IL-2) left its regulatory sign ambiguous\", \"No phosphosites mapped\", \"Endogenous loss-of-function not yet tested\"]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Identified SKAP55 as a constitutive SH3-domain partner of the ADAP proline-rich region, defining the core ADAP/SKAP55 module.\",\n      \"evidence\": \"Yeast two-hybrid, co-IP, truncation/point mutant co-transfection in COS cells, and confocal colocalization\",\n      \"pmids\": [\"9671755\", \"9748251\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional consequence of the ADAP\\u2013SKAP55 interaction not yet established\", \"Downstream effectors of the module unknown\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"Resolved the FYN-T\\u2013ADAP\\u2013SLP-76 signaling matrix and mapped the phosphotyrosines (Y595, Y651) that create SLP-76 SH2 docking sites, defining the molecular basis of receptor coupling.\",\n      \"evidence\": \"In vitro kinase assays, Y\\u2192F mutagenesis, co-IP in Jurkat cells, and IL-2/NF-AT reporter assays\",\n      \"pmids\": [\"10409671\", \"10497204\", \"10570256\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether synergy required FYN\\u2013ADAP binding was dispensable, narrowing function to the SLP-76 arm\", \"Physiological phenotype still inferred from overexpression\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Connected ADAP to actin polymerization and integrin signaling, linking the SLP-76 complex to the Ena/VASP\\u2013WASP\\u2013Arp2/3 machinery and to \\u03b21 integrin-driven migration.\",\n      \"evidence\": \"EVH1 pulldown, co-IP of a SLAP/SLP-76/Nck/VASP/WASP complex, inhibitory peptide competition, and transwell migration assays\",\n      \"pmids\": [\"10747096\", \"10640723\", \"10671560\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relationship between actin and integrin outputs not yet separated genetically\", \"Mechanism of integrin avidity change undefined\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Knockout mice resolved the central question of ADAP function, showing it specifically couples TCR signaling to integrin (LFA-1) clustering and adhesion while being dispensable for TCR-induced actin polymerization.\",\n      \"evidence\": \"Two independent Fyb/Slap KO mouse lines with proliferation, cytokine, integrin clustering/adhesion, and F-actin assays; parallel FcR studies in mast cells and macrophages\",\n      \"pmids\": [\"11567141\", \"11567140\", \"11553777\", \"11739662\", \"11741310\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular link from ADAP to integrin avidity not yet identified\", \"Cross-cell-type generalization (mast cell, macrophage) still descriptive\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Defined the unusual C-terminal architecture of ADAP and dissected the SLP-76-binding YDDV motifs as differential controllers of synapse organization.\",\n      \"evidence\": \"NMR structure of the helically-extended SH3 (hSH3) fold and YDDV\\u2192FDDF (M12) mutagenesis with SMAC imaging and conjugation/IL-2 assays\",\n      \"pmids\": [\"15062083\", \"15477347\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Ligand of the hSH3 fold unknown at this stage\", \"pSMAC vs conjugation outputs molecularly unexplained\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Assigned the hSH3 domain a lipid-binding function and showed ADAP stabilizes SKAP55 against proteolysis, explaining the obligate nature of the module.\",\n      \"evidence\": \"Liposome co-sedimentation and NMR mapping of PIP2/PIP3 binding; pulse-chase protein stability assays with SH3 domain mutants\",\n      \"pmids\": [\"15843031\", \"15849195\", \"16020549\", \"15848169\", \"15933714\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo relevance of hSH3 lipid binding to membrane targeting not directly tested\", \"Redox (SHP-2) and osteoclast/mAbp1 links from single labs\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Resolved how the ADAP/SKAP55 module drives inside-out integrin activation, by targeting active Rap1 and RIAM to the plasma membrane without altering Rap1 GTPase activity.\",\n      \"evidence\": \"Module-disruption mutants, Rap1 membrane fractionation and GTPase assays, RIAM/SKAP55 domain mapping, and gain-of-function membrane targeting in T cells\",\n      \"pmids\": [\"16980616\", \"17403904\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How the module is itself recruited to the membrane not yet defined\", \"Step coupling Rap1/RIAM to LFA-1 conformational change unresolved\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Separated ADAP's NF-\\u03baB function from its adhesion function, identifying a CARMA1-binding region required for CBM complex assembly and IKK activation.\",\n      \"evidence\": \"ADAP-/- T cells, CARMA1 co-IP, EMSA, I\\u03baB degradation assays, and domain mutagenesis distinguishing adhesion vs NF-\\u03baB regions\",\n      \"pmids\": [\"17478723\", \"20164171\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether the two functions use physically distinct ADAP pools not yet shown\", \"TAK1 vs CARMA1 division of labor refined in subsequent work\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Characterized ADAP as a multivalent phosphotyrosine interaction hub that oligomerizes SLP-76 to nucleate signaling microclusters, and mapped its quantitative interactome.\",\n      \"evidence\": \"AUC/SPR biophysics of SLP-76 SH2 oligomerization, SILAC/18O phosphopeptide-pulldown mass spectrometry, and confocal microcluster imaging\",\n      \"pmids\": [\"23979596\", \"20661443\", \"20568816\", \"21536650\", \"20957749\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional weight of individual MS-identified partners (RasGAP, PLC\\u03b3, PIK3R1) not individually validated\", \"Stoichiometry in vivo not determined\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Demonstrated that integrin- and NF-\\u03baB-regulating ADAP pools are mutually exclusive and that SKAP55's PH domain (R131) recruits ADAP to the LFA-1 complex, mechanistically separating the two outputs.\",\n      \"evidence\": \"SKAP-ADAP chimera and R131M PH-domain point mutant rescue/block of integrin vs NF-\\u03baB in ADAP-/- T cells, plus LFA-1 costimulation assays\",\n      \"pmids\": [\"21525391\", \"19617540\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of PH-domain membrane/LFA-1 engagement not solved\", \"Switch that partitions ADAP between pools unknown\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Extended ADAP signaling to cell-cycle progression and to neutrophil rolling, showing its NF-\\u03baB/JNK arm drives Cdk2/cyclin E and its adhesion arm supports selectin-triggered integrin activation in vivo.\",\n      \"evidence\": \"ADAP domain mutants with cell-cycle and cyclin E ubiquitination assays; ADAP-/-/SLP-76-/- mice with intravital leukocyte rolling and integrin affinity/avidity measurements\",\n      \"pmids\": [\"22411628\", \"22291096\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct ADAP target controlling cyclin E turnover not identified\", \"BTK\\u2013ADAP relationship in neutrophils mechanistically incomplete\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Showed ADAP functions are receptor- and output-selective, with a Fyn\\u2013ADAP\\u2013CARMA1\\u2013BCL10\\u2013MAP3K7 axis controlling NK cytokine production but not cytotoxicity.\",\n      \"evidence\": \"ADAP-/- mice with separated NK cytotoxicity and cytokine assays, Fyn-ADAP co-IP, and pathway-dissecting inhibitors\",\n      \"pmids\": [\"24036998\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Why cytotoxicity is ADAP-independent at the molecular level not explained\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identified direct ADAP associations with talin and kindlin-3 in platelets, providing the molecular link from ADAP to \\u03b1IIb\\u03b23 integrin activation.\",\n      \"evidence\": \"GST pulldown domain mapping, platelet co-IP/proximity ligation, ADAP-/- mice, and CHO-cell reconstitution of \\u03b1IIb\\u03b23/talin/kindlin-3\",\n      \"pmids\": [\"24523237\", \"19996090\", \"17003372\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether talin/kindlin binding is direct or scaffolded not fully resolved\", \"Spatial coordination with Rap1/RIAM in platelets undefined\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Established new phospho-dependent ADAP interactions (ZAP70 at pY571) and tied the module to immune-effector transcription (NFATc1/PD-1, TRAF6/SMAD3/CD103).\",\n      \"evidence\": \"NMR mapping and microscale thermophoresis (ZAP70-pY571 Kd), Y571F migration assays, and ADAP-/-/SKAP55-/- mice with PD-1, TGF-\\u03b21, and CD103 readouts plus tumor and influenza models\",\n      \"pmids\": [\"26246585\", \"25851535\", \"25909459\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How distinct phosphosites (Y571 vs Y595) are differentially used not fully defined\", \"Direct transcriptional mechanism downstream of the module incomplete\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Refined the phospho-regulatory model, showing virtually all ADAP tyrosine phosphorylation is restricted to Y595 and that ADAP acts upstream of SLP-76 microcluster formation; megakaryocyte-intrinsic ADAP loss causes microthrombocytopenia.\",\n      \"evidence\": \"TIRF live imaging with a novel pY595-specific antibody and Y595F mutants; constitutive and PF4-Cre conditional ADAP KO mice with 3D bone marrow imaging and MK spreading/podosome assays\",\n      \"pmids\": [\"30305305\", \"29950291\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Reconciliation of Y595-dominance with earlier multi-site MS data not fully addressed\", \"Megakaryocyte signaling pathway to proplatelet polarization incomplete\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Revealed a non-canonical nuclear-transport-regulating function of ADAP in macrophages, competing with STAT1 for importin \\u03b15 and coactivating STAT3.\",\n      \"evidence\": \"ADAP-/- macrophages, co-IP/competition assays, nuclear fractionation, Fc\\u03b3R transcription analysis, and Y571F STAT3 coactivation assays\",\n      \"pmids\": [\"35637282\", \"33431658\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether STAT competition occurs in T cells/platelets not tested\", \"Direct ADAP\\u2013importin \\u03b15 binding interface not mapped\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Expanded ADAP into innate antiviral and inflammatory transcription, restraining RIG-I ISGylation to sustain IFN-\\u03b2 and driving TLR4-induced podoplanin via a BTK\\u2013Y571\\u2013mTOR\\u2013STAT3 axis.\",\n      \"evidence\": \"ADAP-RIG-I co-IP and ISGylation assays with ADAP-/- mice and RNA virus infection; ADAP-/- macrophages with BTK/mTOR inhibitors, Y571 mutagenesis, PDPN promoter assays, and a sepsis model\",\n      \"pmids\": [\"38776321\", \"39903516\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which ADAP inhibits RIG-I ISG15 conjugation not defined\", \"Whether innate functions require the SKAP55/integrin module unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"It remains unresolved how a single scaffold partitions between its mutually exclusive integrin-regulatory, NF-\\u03baB, actin, and nuclear-transport/transcriptional pools, and what structural switches dictate phosphosite selection across cell types.\",\n      \"evidence\": \"No timeline discovery resolves the global regulatory logic coordinating ADAP's distinct functional pools\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No integrated structural model of full-length ADAP in its complexes\", \"Switch governing Y571 vs Y595 usage across T cells, platelets, macrophages undefined\", \"Quantitative partitioning between integrin, NF-\\u03baB, and nuclear pools unmeasured\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 4, 30, 31]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [21, 25, 33, 48]},\n      {\"term_id\": \"GO:0008289\", \"supporting_discovery_ids\": [19]},\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [7, 13, 34]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [2, 25, 27]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [25, 27, 18]},\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [7, 13, 28]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [0, 10, 26, 39]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [4, 25, 36]},\n      {\"term_id\": \"R-HSA-109582\", \"supporting_discovery_ids\": [24, 28, 40, 46]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [37]}\n    ],\n    \"complexes\": [\n      \"CARMA1-BCL10-MALT1 (CBM) complex\",\n      \"SLP-76 microcluster/signalosome\",\n      \"ADAP/SKAP55 module\"\n    ],\n    \"partners\": [\n      \"SLP-76\",\n      \"FYN\",\n      \"SKAP55\",\n      \"Nck\",\n      \"RIAM\",\n      \"CARMA1\",\n      \"TAK1\",\n      \"talin\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}