{"gene":"BLNK","run_date":"2026-06-09T22:02:44","timeline":{"discoveries":[{"year":1998,"finding":"BLNK (B cell linker protein) was identified as a novel adaptor protein that interfaces the BCR-associated Syk tyrosine kinase with PLCγ, Vav guanine nucleotide exchange factor, and the Grb2 and Nck adaptor proteins. Tyrosine phosphorylation of BLNK by Syk creates docking sites for these SH2-containing effector molecules.","method":"Co-immunoprecipitation, biochemical pulldown, identification of protein interactions in B cells","journal":"Immunity","confidence":"High","confidence_rationale":"Tier 2 / Strong — foundational paper, reciprocal co-IP, multiple binding partners identified, independently replicated by multiple subsequent labs","pmids":["9697839"],"is_preprint":false},{"year":1998,"finding":"SLP-65/BLNK is a B cell adaptor protein that requires expression of the B cell antigen receptor (BCR) for its tyrosine phosphorylation; phosphorylation was induced by BCR engagement or pervanadate and SLP-65 forms a signaling complex involving Grb2 and Vav.","method":"BCR-inducible expression system, pervanadate stimulation, co-immunoprecipitation, 2D gel electrophoresis, peptide sequencing","journal":"The Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods, BCR-dependence of phosphorylation demonstrated experimentally, replicated by other labs","pmids":["9705962"],"is_preprint":false},{"year":1999,"finding":"BLNK is essential for BCR-induced PLCγ2 activation and JNK activation in B cells. PLCγ2 activation (but not JNK) was restored by membrane-targeted PLCγ2 in BLNK-deficient cells, indicating BLNK regulates PLCγ2 localization. JNK activation requires both Rac1 and PLCγ2 downstream of BLNK.","method":"BLNK-deficient B cell lines, reconstitution with membrane-targeted PLCγ2, calcium flux assay, JNK kinase assay","journal":"Immunity","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — reconstitution experiments in BLNK-deficient cells with multiple orthogonal functional readouts, mechanistic dissection of PLCγ2 vs JNK pathways","pmids":["10023776"],"is_preprint":false},{"year":1999,"finding":"The N-terminal SH2 domain (SH2-N) of PLCγ2 is required for its association with BLNK, and this association is critical for inositol-1,4,5-trisphosphate generation upon BCR engagement. Loss of SH2-N abolishes PLCγ2-BLNK interaction and IP3 production.","method":"PLCγ2 SH2 domain mutants in PLCγ2-deficient B cells, co-immunoprecipitation, IP3 measurement, reconstitution with membrane-targeted forms","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — mutagenesis of specific domain combined with functional reconstitution in deficient cells and biochemical assays","pmids":["10438904"],"is_preprint":false},{"year":1999,"finding":"BLNK is identified as a major binding partner of the Btk SH2 domain in B cells. The interaction between BLNK and Btk-SH2 domain contributes to complete tyrosine phosphorylation of PLCγ2 upon BCR stimulation.","method":"Affinity purification with Btk-SH2 domain, co-immunoprecipitation, tyrosine phosphorylation assays","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Strong — biochemical identification of BLNK as Btk-SH2 binding partner with functional consequence for PLCγ2 phosphorylation, replicated by subsequent studies","pmids":["10498607"],"is_preprint":false},{"year":1999,"finding":"BLNK is required for B cell development in vivo; BLNK-deficient mice show a block at the pro-B to pre-B cell transition. BLNK links BCR-activated Syk kinase to phosphoinositide and MAP kinase pathways.","method":"BLNK knockout mice generation, flow cytometric analysis of B cell developmental stages","journal":"Science","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic knockout with defined developmental block phenotype, replicated across multiple independent knockout mouse studies","pmids":["10583957"],"is_preprint":false},{"year":1999,"finding":"Human BLNK deficiency (homozygous splice defect) causes a developmental block at the pro-B to pre-B cell transition, with normal pro-B cells but absent pre-B and mature B cells, establishing BLNK's non-redundant role in human B cell development.","method":"Patient genetic analysis, bone marrow immunophenotyping, splice defect characterization","journal":"Science","confidence":"High","confidence_rationale":"Tier 2 / Strong — human loss-of-function genetics with defined cellular phenotype, replicated in subsequent human cases","pmids":["10583958"],"is_preprint":false},{"year":2001,"finding":"BLNK mediates Syk-dependent Btk activation by acting as a scaffold: coexpression of BLNK allows Syk to phosphorylate Btk on tyrosine 551 via Btk-SH2 domain interaction with BLNK, enhancing Btk kinase activity. BCR-induced Btk phosphorylation and activation are reduced in BLNK-deficient B cells.","method":"Reconstitution cell system, BLNK-deficient B cells, Btk phosphorylation assays, kinase activity assays, mutagenesis of Btk Y551","journal":"Proceedings of the National Academy of Sciences","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — reconstitution system with specific tyrosine mutagenesis, validated in BLNK-deficient primary B cells with biochemical readouts","pmids":["11226282"],"is_preprint":false},{"year":2001,"finding":"BLNK is directly recruited to the BCR signaling subunit Igα through non-ITAM tyrosine Y204 (phosphorylated upon BCR ligation). The BLNK SH2 domain binds phospho-Y204 of Igα, coupling Syk activation to BLNK-dependent downstream pathways.","method":"Chimeric receptors with wild-type and mutant Igα cytoplasmic tails, co-immunoprecipitation, direct binding assays, reconstitution of downstream signaling","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — multiple orthogonal approaches including chimeric receptors, direct binding, mutagenesis, and functional reconstitution; consistent with independent study (PMID:11449366)","pmids":["11909947","11449366"],"is_preprint":false},{"year":2001,"finding":"SLP-65/BLNK associates directly with the BCR signaling subunit Igα/Igβ heterodimer; the SLP-65 SH2 domain binds phosphorylated Igα tyrosine 204 (outside the ITAM), providing a mechanism for SLP-65 membrane recruitment.","method":"Co-immunoprecipitation after B cell stimulation, domain mapping with SH2 domain of SLP-65, phosphopeptide binding","journal":"European journal of immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct protein-protein interaction with domain mapping, corroborated by independent study (PMID:11909947)","pmids":["11449366"],"is_preprint":false},{"year":2001,"finding":"BLNK is required for BCR-induced NF-κB activation; BLNK-deficient B cells fail to degrade IκB upon BCR stimulation, cannot induce cyclin D2/CDK4 or Bcl-xL expression, and show high spontaneous apoptosis. BLNK orchestrates a Btk-PLCγ2 signaling axis regulating NF-κB.","method":"BLNK-deficient B cells, cell cycle analysis, NF-κB reporter assays, IκB degradation assays, cyclin/CDK expression analysis","journal":"Journal of Biological Chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple signaling pathway readouts in genetic knockout cells with specific molecular endpoints","pmids":["11274146"],"is_preprint":false},{"year":2001,"finding":"BASH/BLNK links BCR signaling to activation of hematopoietic progenitor kinase 1 (HPK1): BCR ligation induces Syk/Lyn-mediated tyrosine phosphorylation of HPK1 at Y379, which then associates with the BASH SH2 domain. BASH-recruited HPK1 activates IKKβ. HPK1 activation is impaired in Syk- or BASH-deficient B cells.","method":"Co-immunoprecipitation, kinase assays, site-directed mutagenesis of HPK1 Y379, analysis in Syk- and BASH-deficient B cells","journal":"Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — biochemical interaction, mutagenesis of phosphorylation site, functional validation in knockout cells with IKKβ readout","pmids":["11514608"],"is_preprint":false},{"year":2002,"finding":"Phosphorylation of five tyrosine residues within human BLNK nucleates distinct signaling effectors after BCR activation. Multiple tyrosine phosphorylations amplify PLCγ-mediated signaling and support 'cis'-mediated interaction between distinct signaling effectors within a large molecular complex.","method":"Systematic mutagenesis of BLNK tyrosines, reconstitution in BLNK-deficient B cells, signaling readouts (Ca2+ mobilization, MAP kinase activation)","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — systematic tyrosine mutagenesis with multiple functional readouts establishing the molecular scaffold mechanism","pmids":["12456653"],"is_preprint":false},{"year":2002,"finding":"SLP-65/BLNK acts as a tumor suppressor in pre-B cells: SLP-65-deficient pre-B cells show enhanced IL-7-dependent proliferative capacity and SLP-65-deficient mice have high incidence of pre-B cell lymphoma. Reintroduction of SLP-65 promotes pre-BCR downregulation and enhanced differentiation.","method":"SLP-65-deficient mice analysis, ex vivo proliferation assays, retroviral reconstitution of SLP-65 expression, tumor incidence monitoring","journal":"Nature immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic knockout with reconstitution, multiple phenotypic readouts, replicated in subsequent studies","pmids":["12436112"],"is_preprint":false},{"year":2002,"finding":"BLNK is a direct transcriptional target of the transcription factor Pax5 (BSAP); Pax5 activates BLNK expression to control pre-BCR signaling and the pro-B to pre-B cell transition.","method":"Pax5-deficient pro-B cells, BLNK restoration experiments, Pax5-BLNK promoter analysis, BLNK-estrogen receptor fusion for inducible signaling","journal":"Immunity","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct transcriptional regulation demonstrated with Pax5-deficient cells and BLNK reconstitution; inducible system for mechanistic dissection","pmids":["12387741"],"is_preprint":false},{"year":2003,"finding":"Adaptor molecules Grb2 and BLNK cooperate to localize Vav3 to membrane rafts, which is required for efficient Rac1 activation in response to BCR stimulation. Expression of raft-targeted Vav3 rescues defective Rac1 activation in Grb2- or BLNK-deficient B cells.","method":"Grb2- and BLNK-deficient B cells, Rac1 activation assays, membrane raft fractionation, raft-targeted Vav3 reconstitution","journal":"Immunity","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic deficiency models with specific reconstitution experiment establishing the mechanism of Vav3 raft localization","pmids":["12818159"],"is_preprint":false},{"year":2005,"finding":"A conserved leucine zipper in the N-terminus of SLP-65 is responsible for its association with the plasma membrane. Alterations in the N-terminus abolish SLP-65 membrane localization and activity; replacement with a myristoylation signal restores both. The N-terminus is an autonomous domain sufficient to confer membrane localization.","method":"Mutational analysis of SLP-65 N-terminus in DT40 B cells, live cell imaging of GFP fusions, functional reconstitution assays, domain transfer experiments to SLP-76","journal":"Nature immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — mutagenesis with functional reconstitution, domain transfer experiments establishing mechanism of membrane targeting","pmids":["15654340"],"is_preprint":false},{"year":2007,"finding":"The C-terminal SH2 domain of SLP-65 controls efficient tyrosine phosphorylation by Syk, plasma membrane recruitment, and downstream signaling to NFAT. A kinase-independent adaptor function of Syk is required to link phosphorylated SLP-65 to Ca2+ mobilization, making Syk both upstream and downstream of SLP-65.","method":"SH2 domain mutational analysis in DT40 B cells, reconstitution of SLP-65 in SLP-76-deficient T cells, Ca2+ mobilization assays, NFAT reporter assays","journal":"Journal of Biological Chemistry","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — dual genetic reconstitution systems, domain mutagenesis, multiple functional readouts revealing bidirectional Syk-SLP65 relationship","pmids":["17681949"],"is_preprint":false},{"year":2008,"finding":"BLNK suppresses pre-B cell leukemia through direct binding to and inhibition of JAK3. BLNK-deficient pre-B leukemia cells have constitutively active JAK3/STAT5 due to autocrine IL-7 production; exogenous BLNK inhibits JAK3 signaling in a binding-dependent manner, inducing p27Kip1, cell cycle arrest, and apoptosis.","method":"BLNK-deficient leukemia cells, JAK3 inhibition experiments, BLNK reconstitution, co-immunoprecipitation of BLNK-JAK3, STAT5-CA transgenic mice, IL-7R signaling analyses","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct protein-protein interaction combined with functional reconstitution and in vivo transgenic validation","pmids":["19047679"],"is_preprint":false},{"year":2008,"finding":"SLP-65 counteracts PKB/Akt activation and promotes Foxo3a and Foxo1 activity in pre-B cells, thereby enabling Ig light chain rearrangement. SLP-65-dependent signaling antagonizes PI(3)K-PKB-Foxo pathway, establishing a mechanistic link between SLP-65 and immunoglobulin recombination.","method":"SLP-65 reconstitution in deficient pre-B cells, Foxo phosphorylation analysis, PKB activity measurements, light chain recombination assays, Foxo transcription factor activity assays","journal":"Nature immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — mechanistic reconstitution experiments with multiple orthogonal readouts linking SLP-65 to PI3K-PKB-Foxo pathway","pmids":["18488031"],"is_preprint":false},{"year":2009,"finding":"SLP-65 phosphorylation occurs at multiple sites with different dynamics (early/transient, early/sustained, or late). Serine 170 phosphorylation acts as a BCR-distal checkpoint for some B cell responses but not others. Some sites are phosphorylated in resting cells and undergo rapid dephosphorylation upon BCR ligation.","method":"Mass spectrometric analysis of SLP-65 phospho-sites in DT40 B cells, site-specific mutagenesis, functional assays for B cell responses","journal":"Molecular & cellular proteomics","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — MS-based phosphosite mapping combined with systematic mutagenesis and functional readouts","pmids":["19372136"],"is_preprint":false},{"year":2009,"finding":"BLNK binds the active (GTP-loaded) form of H-Ras via a 10-amino acid Ras-binding domain. This interaction is facilitated by BCR crosslinking and is required for sustained ERK phosphorylation, BCR capping, and anti-apoptotic signaling. The Ras-binding domain fused to a CD8α-Igα chimeric receptor reconstitutes these activities in BLNK-deficient cells.","method":"Co-immunoprecipitation with active H-Ras, domain mutagenesis of BLNK Ras-binding region, reconstitution in BLNK-deficient B cells, ERK phosphorylation assays, BCR capping imaging","journal":"Journal of Biological Chemistry","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — direct binding with domain mutagenesis, functional reconstitution in knockout cells, multiple orthogonal readouts","pmids":["19218240"],"is_preprint":false},{"year":2011,"finding":"SLP65/BLNK forms a stimulation-independent, constitutive complex with CIN85. This preformed SLP65/CIN85 complex is required for SLP65 phosphorylation and its inducible plasma membrane translocation. In the absence of the SLP65/CIN85 complex, BCR-induced Ca2+ and NF-κB responses are abrogated. Mass spectrometry identified ~30 SLP65 interaction partners with predominantly dynamic interactions.","method":"Quantitative in vivo interactomics by mass spectrometry, co-immunoprecipitation, live cell imaging, CIN85 knockout B cells, Ca2+ flux assays, NF-κB reporter assays","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — quantitative mass spectrometry interactome combined with live imaging, reciprocal co-IP, and functional knockout validation with multiple signaling readouts","pmids":["21822214"],"is_preprint":false},{"year":2012,"finding":"HPK1 phosphorylates BLNK at threonine 152, which mediates BLNK binding to 14-3-3 proteins. Threonine 152-phosphorylated BLNK is subsequently ubiquitinated at lysines 37, 38, and 42, leading to its degradation and attenuation of MAPK and IKK activation in B cells during BCR signaling.","method":"HPK1-deficient B cells, site-directed mutagenesis of BLNK T152 and K37/38/42, ubiquitination assays, co-immunoprecipitation with 14-3-3, signaling assays","journal":"Journal of Biological Chemistry","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — specific residue mutagenesis, ubiquitination assays, 14-3-3 binding, validated in HPK1-deficient cells with functional signaling readouts","pmids":["22334673"],"is_preprint":false},{"year":2012,"finding":"CMTM7 (a tetra-spanning membrane protein) co-localizes with sIgM at the plasma membrane and acts as a transmembrane linker between sIgM and BLNK. CMTM7 knockdown impairs BLNK-Syk interaction and BLNK tyrosine phosphorylation, and a C-terminal deletion of CMTM7 (defective in membrane localization) abolishes these functions, while N-terminal deletion does not.","method":"RNAi knockdown of CMTM7, reconstitution with CMTM7 mutants (ΔN, ΔC), co-immunoprecipitation of BLNK-Syk and CMTM7-sIgM-BLNK complexes, JNK/ERK activation assays, fluorescence colocalization","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 2 / Strong — domain-specific mutagenesis of CMTM7 with rescue experiments, multiple co-IP interactions, and functional signaling readouts","pmids":["22363743"],"is_preprint":false},{"year":2013,"finding":"The C2 domain of PLCγ2 binds in a Ca2+-regulated manner to a distinct phosphotyrosine of SLP65, providing feed-forward signal amplification. Early Ca2+ flux promotes C2 domain anchoring to phospho-SLP65, amplifying PLCγ2 activity; as Ca2+ resources are exhausted, the C2-phosphotyrosine interaction terminates despite sustained SLP65 phosphorylation.","method":"PLCγ2 C2 domain mutational analysis, Ca2+ flux assays, co-immunoprecipitation of PLCγ2-SLP65, biochemical binding studies","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — domain mutagenesis with Ca2+-regulated binding mechanism established by biochemical and functional assays","pmids":["24166973"],"is_preprint":false},{"year":2014,"finding":"SLP-65 associates with intracellular vesicles in resting B cells via a ~50 amino acid N-terminal module. NMR spectroscopy showed the N-terminus is structurally disordered in solution but binds in a structured manner to noncharged lipid components of cellular membranes. Vesicle-associated preformed signaling scaffolds are required for B cell activation.","method":"Subcellular fractionation, live cell imaging, NMR spectroscopy of SLP-65 N-terminal domain with membrane lipids, mutational analysis, B cell activation assays","journal":"Science signaling","confidence":"High","confidence_rationale":"Tier 1 / Strong — NMR structural analysis combined with live imaging and mutagenesis revealing vesicular localization mechanism","pmids":["25140054"],"is_preprint":false},{"year":2017,"finding":"In CLL cells, BLNK forms a complex with CK2, CD5, and STAT3. CK2 phosphorylates STAT3 on serine 727 constitutively in CLL cells; this requires co-expression of CD5 and BLNK (not present in normal B or T cells). siRNA knockdown of CD5 or BLNK, or CD5-neutralizing antibodies, significantly reduced serine-phosphorylated STAT3. The CK2/CD5/BLNK/STAT3 complex is cytoplasmic; serine-phosphorylated STAT3 translocates to the nucleus.","method":"Mass spectrometry co-immunoprecipitation, CK2 in vitro kinase assay with recombinant STAT3, siRNA knockdown, confocal microscopy, subcellular fractionation","journal":"Molecular cancer research","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — in vitro kinase assay combined with co-IP complex identification, RNAi functional validation, and subcellular localization by multiple methods","pmids":["28130399"],"is_preprint":false},{"year":2020,"finding":"The crystal structure of a BLNK pT152 peptide bound to 14-3-3σ was solved. Biophysical assays (fluorescence polarization, ITC) showed that BLNK interacts with 14-3-3 via a gatekeeper model: HPK1-mediated phosphorylation of T152 anchors BLNK to 14-3-3, and additional AKT-mediated phosphorylation of S285 further improves affinity.","method":"X-ray crystallography of BLNK peptide-14-3-3σ complex, fluorescence polarization, isothermal titration calorimetry with mono- and di-phosphorylated BLNK peptides","journal":"Journal of structural biology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — crystal structure with biophysical binding data establishing mechanism of 14-3-3 interaction; single lab but multiple orthogonal methods","pmids":["33176192"],"is_preprint":false},{"year":2022,"finding":"ECM detachment of non-malignant breast epithelial cells upregulates BLNK; ErbB2 blocks this upregulation by reducing IRF6 levels. BLNK promotes anoikis by activating p38 MAP kinase. ErbB2-dependent BLNK downregulation blocks breast cancer cell anoikis, and BLNK upregulation blocks tumor formation in mice.","method":"ErbB2 overexpression/knockdown, IRF6 manipulation, BLNK forced expression/knockdown, p38 inhibitor experiments, anoikis assays, 3D tumor growth, in vivo tumor formation","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — mechanistic pathway established in non-B cell context with multiple readouts but single lab","pmids":["35933456"],"is_preprint":false},{"year":2022,"finding":"BLNK is a positive regulator of Met receptor signaling in NSCLC cells: BLNK modulates Met localization and ligand-dependent trafficking. The BLNK-GRB2 constitutive interaction is increased by active Met, and the Met-GRB2 interaction is increased in the presence of BLNK. BLNK contributes to anchorage-independent growth and chemotaxis of NSCLC cells.","method":"Mammalian Membrane Two-Hybrid (MaMTH) assay, BLNK knockdown, Met trafficking assays, co-immunoprecipitation of BLNK-GRB2 and Met-GRB2, anchorage-independent growth assays, chemotaxis assays","journal":"iScience","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — MaMTH interaction assay combined with functional knockdown and signaling assays in non-canonical cell type; single lab","pmids":["36388990"],"is_preprint":false},{"year":2024,"finding":"SLP65 and CIN85 form phase-separated condensates at intracellular vesicles in resting B cells via 6 proline-rich motifs (PRMs) of SLP65 interacting with 3 SH3 domains of CIN85 (18 individual SH3-PRM interactions). Quantified individual dissociation constants of these interactions model the phase-separation behavior. A previously unknown intramolecular interaction was also identified.","method":"Biophysical measurement of individual SH3-PRM dissociation constants, LASSI phase-separation modeling, designer construct analysis, identification of intramolecular interaction","journal":"PNAS nexus","confidence":"High","confidence_rationale":"Tier 1 / Moderate — rigorous biophysical quantification of multivalent interactions combined with computational modeling of phase separation, single lab but multiple orthogonal methods","pmids":["38463037"],"is_preprint":false},{"year":2024,"finding":"In macrophages, CLR (C-type lectin receptor) signaling activates Syk-mediated BLNK activation, which impedes macrophage migration by disrupting podosome ring formation. BLNK associates with c-Cbl and competitively disrupts Fyn-c-Cbl interaction, blocking Fyn-mediated c-Cbl phosphorylation and c-Cbl-associated F-actin assembly. BLNK deficiency in monocytes enhances macrophage migration and resistance to Candida albicans infection.","method":"Monocyte-specific BLNK conditional knockout mice, co-immunoprecipitation of BLNK-c-Cbl and Fyn-c-Cbl, podosome ring imaging, macrophage migration assays, Candida albicans infection model, F-actin assembly assays","journal":"Proceedings of the National Academy of Sciences","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional knockout mice, co-IP competition assays, in vivo infection model, multiple orthogonal mechanistic assays establishing BLNK-c-Cbl-Fyn pathway","pmids":["39413134"],"is_preprint":false},{"year":2001,"finding":"In EBV-latently infected B cells, LMP2A causes constitutive tyrosine phosphorylation of one SLP-65 isoform and complex formation between SLP-65 and CrkL, leading to Cbl and C3G phosphorylation. However, PLCγ2 activation is completely blocked by LMP2A, demonstrating selective activation and repression of distinct SLP-65-regulated signaling pathways.","method":"Mouse model of LMP2A expression, biochemical analysis of SLP-65 phosphorylation and complex formation, PLCγ2 activation assays","journal":"Journal of experimental medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo mouse model with biochemical dissection of signaling pathways; novel context but single lab","pmids":["11489945"],"is_preprint":false},{"year":2006,"finding":"The two human SLP-65 isoforms differ functionally: the long isoform contains an atypical SH3-binding motif that mediates Grb2 association and suppresses p38/JNK MAP kinase activation and c-Fos expression, whereas the short isoform more potently activates AP1- and NF-κB-driven transcription. The long isoform promotes BCR-induced apoptosis more than the short isoform.","method":"Reconstitution of SLP-65 isoforms in SLP-65-deficient B cells, kinase activity assays, reporter gene assays, mutagenesis of SH3-binding motif, apoptosis assays","journal":"Blood","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — isoform-specific reconstitution with domain mutagenesis and multiple functional readouts; single lab","pmids":["16912232"],"is_preprint":false},{"year":2004,"finding":"BNAS2, a novel protein with four transmembrane domains and MARVEL domain localizing to the ER, binds the conserved N-terminal domain of BASH/BLNK, co-precipitates with Btk and ERK2, and overexpression enhances BCR-induced Elk1 but not NF-κB transcriptional activation.","method":"Yeast two-hybrid, co-immunoprecipitation from B cell lysates, confocal microscopy, transcriptional reporter assays in DT40 B cells","journal":"Journal of Biological Chemistry","confidence":"Low","confidence_rationale":"Tier 3 / Weak — yeast two-hybrid and single co-IP with limited functional follow-up; single lab","pmids":["15087455"],"is_preprint":false},{"year":2006,"finding":"BNAS1, a novel protein with four transmembrane domains and a leucine zipper, binds the conserved N-terminal domain of BASH/BLNK via its LZ motif and localizes to the ER and nuclear envelope. BNAS1 overexpression suppresses BCR-induced Elk-1 activation; BNAS1-deficient DT40 cells show augmented Elk-1 activation that is selectively blocked by JNK inhibitor.","method":"Yeast two-hybrid, co-immunoprecipitation, confocal microscopy, BNAS1-deficient DT40 cells, reporter assays, JNK inhibitor experiments","journal":"International immunology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — co-IP and knockout cell line with limited mechanistic follow-up; single lab","pmids":["16481341"],"is_preprint":false},{"year":2022,"finding":"SLP65 induces RHOA activity in pre-B cells, which activates PTEN by enabling its translocation to the plasma membrane, thereby counteracting PI3K signaling. This SLP65-RHOA-PTEN axis is required for pre-B cell development and survival.","method":"Conditional RhoA-deficient mice, SLP65-deficient B cells, PTEN localization by imaging, reconstitution with RhoA and Foxo1, in vitro and in vivo survival assays","journal":"Frontiers in immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — conditional knockout mice with reconstitution experiments and PTEN localization imaging; single lab","pmids":["35371049"],"is_preprint":false},{"year":2006,"finding":"BASH/BLNK mediates a pre-BCR signaling pathway involving novel PKC (nPKC) and MEK (but not Ras) to induce kappa light chain gene rearrangement. Reconstitution of BLNK in pre-B leukemia cells or PMA treatment induces PKCη translocation to the plasma membrane and kappa gene rearrangement.","method":"BASH-deficient pre-B leukemia cell lines, specific inhibitors for nPKC/MEK/Ras, retroviral transduction of active PKCη/PKCε/Raf-1, tamoxifen-inducible BASH reconstitution, kappa chain expression assays","journal":"Blood","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological dissection of pathway combined with reconstitution with active kinase constructs; single lab","pmids":["16794253"],"is_preprint":false},{"year":2000,"finding":"BLNK is expressed in macrophages and becomes tyrosine-phosphorylated upon FcγRI and FcγRII/III ligation, indicating coupling to FcγR signaling pathways in these cells.","method":"Flow cytometry and Western blotting for BLNK expression in macrophages, FcγR ligation experiments, tyrosine phosphorylation assays","journal":"Proceedings of the National Academy of Sciences","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — expression and phosphorylation in macrophages established by direct experiment; replicated in subsequent study","pmids":["10677525"],"is_preprint":false}],"current_model":"BLNK/SLP-65 is a central scaffold adaptor protein in B cells that is phosphorylated on multiple tyrosine residues by Syk upon BCR activation; it is recruited to the BCR via direct binding of its SH2 domain to phospho-Y204 of Igα, facilitated by the transmembrane protein CMTM7, and pre-positioned at intracellular vesicles through its N-terminal leucine zipper/lipid-binding module in complex with CIN85 (which phase-separates with SLP65 via multivalent SH3-PRM interactions); once phosphorylated, BLNK nucleates a large signaling complex that activates PLCγ2 (via SH2-N and Ca2+-regulated C2 domain interactions), Btk (by serving as a scaffold enabling Syk to phosphorylate Btk-Y551), Vav/Rac1 (via Grb2-dependent membrane raft localization), H-Ras/ERK (via a direct Ras-binding domain), HPK1/IKKβ (via SH2-domain recruitment of phospho-HPK1), and NF-κB, while negative regulation is achieved by HPK1-mediated phosphorylation of BLNK-T152 promoting 14-3-3 binding and subsequent ubiquitination at K37/38/42 and proteasomal degradation; in pre-B cells BLNK also antagonizes PI3K-PKB-Foxo signaling via RHOA-PTEN and directly inhibits JAK3 to suppress IL-7-driven proliferation and prevent leukemogenesis, and in macrophages CLR-activated BLNK inhibits migration by associating with c-Cbl to disrupt Fyn-mediated F-actin assembly."},"narrative":{"mechanistic_narrative":"BLNK (also SLP-65/BASH) is the central cytoplasmic scaffold adaptor that couples the activated B cell antigen receptor to its downstream effector machinery, and its loss arrests B lymphopoiesis at the pro-B to pre-B transition in both mice and humans [PMID:9697839, PMID:10583957, PMID:10583958]. Upon BCR engagement, the Syk tyrosine kinase phosphorylates BLNK on multiple tyrosines that act as docking sites, converting it into a nucleation platform for SH2-containing effectors including PLCγ2, Vav, Grb2, and Nck [PMID:9697839, PMID:12456653]. BLNK is recruited to the receptor through its C-terminal SH2 domain binding phospho-Y204 of the Igα signaling subunit outside the ITAM, with the tetraspanning membrane protein CMTM7 acting as a transmembrane linker between surface IgM and BLNK [PMID:11909947, PMID:11449366, PMID:22363743]. Membrane and vesicle positioning is set before stimulation by an N-terminal leucine-zipper/lipid-binding module that associates with intracellular vesicles and the plasma membrane, working within a constitutive SLP65/CIN85 complex that phase-separates through multivalent SH3–proline-rich-motif interactions and is required for BLNK phosphorylation and inducible membrane translocation [PMID:15654340, PMID:21822214, PMID:25140054, PMID:38463037]. Once assembled, BLNK drives PLCγ2 activation by anchoring its N-terminal SH2 and Ca2+-regulated C2 domains [PMID:10023776, PMID:10438904, PMID:24166973], serves as the scaffold that lets Syk phosphorylate Btk-Y551 to activate Btk [PMID:10498607, PMID:11226282], localizes Vav3 to membrane rafts for Rac1 activation [PMID:12818159], binds GTP-loaded H-Ras through a discrete Ras-binding domain to sustain ERK signaling [PMID:19218240], and recruits phospho-HPK1 to activate IKKβ and NF-κB, controlling cell-cycle and survival gene expression [PMID:11274146, PMID:11514608]. BLNK output is curtailed by an HPK1–14-3-3–ubiquitination circuit: HPK1 phosphorylates BLNK-T152 to create a 14-3-3 docking site, promoting ubiquitination at K37/38/42 and proteasomal degradation [PMID:22334673, PMID:33176192]. In pre-B cells BLNK is a Pax5 target that functions as a tumor suppressor, restraining IL-7-driven proliferation by directly inhibiting JAK3 and antagonizing PI3K–PKB–Foxo signaling to permit immunoglobulin light-chain rearrangement [PMID:12436112, PMID:12387741, PMID:19047679, PMID:18488031]. Beyond B cells, BLNK couples C-type lectin/Syk signaling in macrophages to inhibition of migration via c-Cbl–Fyn antagonism [PMID:39413134].","teleology":[{"year":1998,"claim":"Established BLNK's foundational identity as the adaptor bridging BCR-activated Syk to downstream effectors, defining the core of B cell signaling architecture.","evidence":"Co-immunoprecipitation and biochemical pulldowns in B cells identifying Syk-induced tyrosine phosphorylation and binding of PLCγ, Vav, Grb2, and Nck","pmids":["9697839","9705962"],"confidence":"High","gaps":["Did not map which specific tyrosines bind which effectors","Did not establish in vivo developmental requirement"]},{"year":1999,"claim":"Showed BLNK is functionally required for BCR-induced PLCγ2 and JNK activation and acts by controlling PLCγ2 membrane localization via its SH2-N interaction.","evidence":"Reconstitution of BLNK-deficient and PLCγ2-deficient B cell lines with membrane-targeted or domain-mutant PLCγ2, calcium flux, IP3 and JNK assays","pmids":["10023776","10438904"],"confidence":"High","gaps":["Mechanism of Rac1 contribution to JNK not resolved","Structural basis of SH2-N/BLNK contact not defined"]},{"year":1999,"claim":"Demonstrated BLNK is non-redundantly required for B cell development in vivo in both mouse and human, fixing its place at the pro-B to pre-B checkpoint.","evidence":"BLNK knockout mice and human homozygous splice-defect patient analysis with developmental immunophenotyping","pmids":["10583957","10583958"],"confidence":"High","gaps":["Which downstream pathway failure causes the block not pinpointed"]},{"year":2001,"claim":"Resolved how BLNK is recruited to the receptor and how it activates Btk, NF-κB, and HPK1/IKKβ, converting it from a binding hub into a defined signal-routing platform.","evidence":"Chimeric Igα receptors with mutant Y204, scaffold reconstitution of Syk-mediated Btk-Y551 phosphorylation, and analysis of NF-κB/IκB and HPK1 in deficient B cells","pmids":["11909947","11449366","11226282","11274146","11514608"],"confidence":"High","gaps":["Spatial coordination of these parallel complexes on one BLNK molecule not directly visualized"]},{"year":2002,"claim":"Defined the multi-tyrosine scaffold logic of BLNK and established its tumor-suppressor role downstream of Pax5 in pre-B cells.","evidence":"Systematic tyrosine mutagenesis with signaling readouts, plus SLP-65-deficient mouse lymphoma analysis and Pax5-dependent transcriptional regulation studies","pmids":["12456653","12436112","12387741"],"confidence":"High","gaps":["Molecular target of tumor-suppressor activity not yet identified in 2002"]},{"year":2003,"claim":"Defined how BLNK directs Rac1 activation by cooperating with Grb2 to localize Vav3 to membrane rafts.","evidence":"Grb2- and BLNK-deficient B cells with raft fractionation and raft-targeted Vav3 rescue of Rac1 activation","pmids":["12818159"],"confidence":"High","gaps":["Direct BLNK-Vav3 versus Grb2-bridged interaction not fully separated"]},{"year":2005,"claim":"Identified the N-terminal leucine zipper as an autonomous membrane-targeting module, explaining how BLNK is pre-positioned for signaling.","evidence":"N-terminus mutagenesis, GFP live imaging, myristoylation rescue, and domain transfer to SLP-76 in DT40 cells","pmids":["15654340"],"confidence":"High","gaps":["Lipid/membrane partner of the leucine zipper not yet identified at this stage"]},{"year":2007,"claim":"Revealed a bidirectional Syk-BLNK relationship in which the BLNK C-terminal SH2 domain governs phosphorylation and membrane recruitment while Syk also acts as a downstream adaptor for Ca2+/NFAT signaling.","evidence":"SH2 mutagenesis in DT40 cells and SLP-65 reconstitution in SLP-76-deficient T cells with Ca2+ and NFAT readouts","pmids":["17681949"],"confidence":"High","gaps":["Structural basis of kinase-independent Syk adaptor role not defined"]},{"year":2008,"claim":"Established the mechanistic basis of BLNK tumor suppression and its role in light-chain rearrangement via JAK3 inhibition and PI3K-PKB-Foxo antagonism.","evidence":"BLNK-deficient leukemia cells with reconstitution, BLNK-JAK3 co-IP, STAT5-CA transgenic mice, and Foxo/PKB activity and recombination assays in pre-B cells","pmids":["19047679","18488031"],"confidence":"High","gaps":["How BLNK both scaffolds activating BCR signals and suppresses cytokine signaling in the same cell not reconciled"]},{"year":2009,"claim":"Defined the H-Ras-binding domain enabling sustained ERK signaling and mapped temporally distinct BLNK phosphorylation dynamics including serine checkpoints.","evidence":"H-Ras co-IP with domain mutagenesis and chimeric receptor rescue, plus MS phosphosite mapping with site-specific mutagenesis in DT40 cells","pmids":["19218240","19372136"],"confidence":"High","gaps":["Kinases for individual serine sites not all assigned","Physiological trigger of resting-state dephosphorylation unclear"]},{"year":2011,"claim":"Showed BLNK functions within a constitutive, preformed SLP65/CIN85 complex required for its own phosphorylation and inducible membrane translocation.","evidence":"Quantitative in vivo interactomics, CIN85-knockout B cells, live imaging, and Ca2+/NF-κB functional readouts","pmids":["21822214"],"confidence":"High","gaps":["Physical organization of the preformed complex not yet structurally resolved"]},{"year":2012,"claim":"Defined the negative-feedback circuit terminating BLNK signaling and identified CMTM7 as the transmembrane linker coupling surface IgM to BLNK-Syk.","evidence":"HPK1-deficient cells with T152/K37-42 mutagenesis and ubiquitination assays, and CMTM7 knockdown/mutant rescue with co-IP and signaling readouts","pmids":["22334673","22363743"],"confidence":"High","gaps":["E3 ligase responsible for K37/38/42 ubiquitination not identified","How CMTM7 coordinates with Igα-Y204 recruitment not resolved"]},{"year":2013,"claim":"Resolved a Ca2+-regulated feed-forward loop in which the PLCγ2 C2 domain anchors to a distinct BLNK phosphotyrosine to amplify and then self-terminate signaling.","evidence":"PLCγ2 C2 domain mutagenesis, Ca2+ flux, and PLCγ2-SLP65 binding assays","pmids":["24166973"],"confidence":"High","gaps":["Identity of the specific BLNK phosphotyrosine bound by C2 not fully pinned"]},{"year":2014,"claim":"Showed BLNK associates with intracellular vesicles in resting cells through a disordered N-terminal module that folds upon binding noncharged membrane lipids, establishing vesicular preformed scaffolds.","evidence":"Subcellular fractionation, live imaging, and NMR of the N-terminal domain with membrane lipids in B cells","pmids":["25140054"],"confidence":"High","gaps":["Identity of the specific vesicle compartment not defined"]},{"year":2024,"claim":"Provided the biophysical basis for vesicular scaffold formation through SLP65/CIN85 multivalent phase separation and extended BLNK function to macrophage migration control.","evidence":"Quantified SH3-PRM dissociation constants with phase-separation modeling, and monocyte-specific BLNK knockout mice with c-Cbl/Fyn co-IP and Candida infection model","pmids":["38463037","39413134"],"confidence":"High","gaps":["In vivo relevance of phase separation to B cell activation not directly tested","Whether macrophage c-Cbl/Fyn mechanism generalizes to other receptors unclear"]},{"year":null,"claim":"How BLNK's positive BCR-scaffolding role and its context-dependent tumor-suppressor/anoikis-promoting and oncogenic-cooperative functions in non-B-cell cancers are mechanistically integrated remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["Non-B-cell roles (breast anoikis, NSCLC Met signaling, CLL CK2/CD5/STAT3) rest on single-lab studies","No unifying structural model of the full activated BLNK signaling complex"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,12,22]},{"term_id":"GO:0008289","term_label":"lipid binding","supporting_discovery_ids":[16,26]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[4,7,18]}],"localization":[{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[16,22,24]},{"term_id":"GO:0031410","term_label":"cytoplasmic vesicle","supporting_discovery_ids":[26,31]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[27]}],"pathway":[{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[0,2,5,12]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[10,15,21]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[5,6,13,14,19]}],"complexes":["SLP65/CIN85 complex","CK2/CD5/BLNK/STAT3 complex"],"partners":["SYK","PLCG2","BTK","GRB2","CIN85","CD79A","HPK1","CMTM7"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q8WV28","full_name":"B-cell linker protein","aliases":["B-cell adapter containing a SH2 domain protein","B-cell adapter containing a Src homology 2 domain protein","Cytoplasmic adapter protein","Src homology 2 domain-containing leukocyte protein of 65 kDa","SLP-65"],"length_aa":456,"mass_kda":50.5,"function":"Functions as a central linker protein, downstream of the B-cell receptor (BCR), bridging the SYK kinase to a multitude of signaling pathways and regulating biological outcomes of B-cell function and development. Plays a role in the activation of ERK/EPHB2, MAP kinase p38 and JNK. Modulates AP1 activation. Important for the activation of NF-kappa-B and NFAT. Plays an important role in BCR-mediated PLCG1 and PLCG2 activation and Ca(2+) mobilization and is required for trafficking of the BCR to late endosomes. However, does not seem to be required for pre-BCR-mediated activation of MAP kinase and phosphatidyl-inositol 3 (PI3) kinase signaling. May be required for the RAC1-JNK pathway. Plays a critical role in orchestrating the pro-B cell to pre-B cell transition. May play an important role in BCR-induced B-cell apoptosis","subcellular_location":"Cytoplasm; Cell membrane","url":"https://www.uniprot.org/uniprotkb/Q8WV28/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/BLNK","classification":"Not Classified","n_dependent_lines":9,"n_total_lines":1208,"dependency_fraction":0.0074503311258278145},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/BLNK","total_profiled":1310},"omim":[{"mim_id":"614406","title":"SLP ADAPTOR- AND CSK-INTERACTING MEMBRANE PROTEIN; SCIMP","url":"https://www.omim.org/entry/614406"},{"mim_id":"613502","title":"AGAMMAGLOBULINEMIA 4, AUTOSOMAL RECESSIVE; AGM4","url":"https://www.omim.org/entry/613502"},{"mim_id":"611434","title":"CYTOKINE-DEPENDENT HEMATOPOIETIC CELL LINKER; CLNK","url":"https://www.omim.org/entry/611434"},{"mim_id":"605719","title":"LINKER FOR ACTIVATION OF T CELLS FAMILY, MEMBER 2; LAT2","url":"https://www.omim.org/entry/605719"},{"mim_id":"604515","title":"B-CELL LINKER PROTEIN; BLNK","url":"https://www.omim.org/entry/604515"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Plasma membrane","reliability":"Supported"},{"location":"Vesicles","reliability":"Additional"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"lymphoid tissue","ntpm":52.9}],"url":"https://www.proteinatlas.org/search/BLNK"},"hgnc":{"alias_symbol":["SLP65","Ly57","SLP-65","BLNK-s","BASH","bca"],"prev_symbol":[]},"alphafold":{"accession":"Q8WV28","domains":[{"cath_id":"3.30.505.10","chopping":"336-453","consensus_level":"high","plddt":93.4116,"start":336,"end":453}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8WV28","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q8WV28-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q8WV28-F1-predicted_aligned_error_v6.png","plddt_mean":63.72},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=BLNK","jax_strain_url":"https://www.jax.org/strain/search?query=BLNK"},"sequence":{"accession":"Q8WV28","fasta_url":"https://rest.uniprot.org/uniprotkb/Q8WV28.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q8WV28/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8WV28"}},"corpus_meta":[{"pmid":"9697839","id":"PMC_9697839","title":"BLNK: a central linker protein in B cell activation.","date":"1998","source":"Immunity","url":"https://pubmed.ncbi.nlm.nih.gov/9697839","citation_count":426,"is_preprint":false},{"pmid":"10023776","id":"PMC_10023776","title":"BLNK required for coupling Syk to PLC gamma 2 and Rac1-JNK in B cells.","date":"1999","source":"Immunity","url":"https://pubmed.ncbi.nlm.nih.gov/10023776","citation_count":266,"is_preprint":false},{"pmid":"10591180","id":"PMC_10591180","title":"Abnormal development and function of B lymphocytes in mice deficient for the signaling adaptor protein SLP-65.","date":"1999","source":"Immunity","url":"https://pubmed.ncbi.nlm.nih.gov/10591180","citation_count":242,"is_preprint":false},{"pmid":"10583958","id":"PMC_10583958","title":"An essential role for BLNK in human B cell development.","date":"1999","source":"Science (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/10583958","citation_count":236,"is_preprint":false},{"pmid":"10583957","id":"PMC_10583957","title":"Requirement for B cell linker protein (BLNK) in B cell development.","date":"1999","source":"Science (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/10583957","citation_count":224,"is_preprint":false},{"pmid":"16493428","id":"PMC_16493428","title":"SLP76 and SLP65: complex regulation of signalling in lymphocytes and beyond.","date":"2006","source":"Nature reviews. 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JAK3.","date":"2008","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/19047679","citation_count":99,"is_preprint":false},{"pmid":"11909947","id":"PMC_11909947","title":"The direct recruitment of BLNK to immunoglobulin alpha couples the B-cell antigen receptor to distal signaling pathways.","date":"2002","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/11909947","citation_count":92,"is_preprint":false},{"pmid":"12456653","id":"PMC_12456653","title":"BLNK: molecular scaffolding through 'cis'-mediated organization of signaling proteins.","date":"2002","source":"The EMBO journal","url":"https://pubmed.ncbi.nlm.nih.gov/12456653","citation_count":92,"is_preprint":false},{"pmid":"18022864","id":"PMC_18022864","title":"CD303 (BDCA-2) signals in plasmacytoid dendritic cells via a BCR-like signalosome involving Syk, Slp65 and PLCgamma2.","date":"2007","source":"European journal of 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Tyrosine phosphorylation of BLNK by Syk creates docking sites for these SH2-containing effector molecules.\",\n      \"method\": \"Co-immunoprecipitation, biochemical pulldown, identification of protein interactions in B cells\",\n      \"journal\": \"Immunity\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — foundational paper, reciprocal co-IP, multiple binding partners identified, independently replicated by multiple subsequent labs\",\n      \"pmids\": [\"9697839\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"SLP-65/BLNK is a B cell adaptor protein that requires expression of the B cell antigen receptor (BCR) for its tyrosine phosphorylation; phosphorylation was induced by BCR engagement or pervanadate and SLP-65 forms a signaling complex involving Grb2 and Vav.\",\n      \"method\": \"BCR-inducible expression system, pervanadate stimulation, co-immunoprecipitation, 2D gel electrophoresis, peptide sequencing\",\n      \"journal\": \"The Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods, BCR-dependence of phosphorylation demonstrated experimentally, replicated by other labs\",\n      \"pmids\": [\"9705962\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"BLNK is essential for BCR-induced PLCγ2 activation and JNK activation in B cells. PLCγ2 activation (but not JNK) was restored by membrane-targeted PLCγ2 in BLNK-deficient cells, indicating BLNK regulates PLCγ2 localization. JNK activation requires both Rac1 and PLCγ2 downstream of BLNK.\",\n      \"method\": \"BLNK-deficient B cell lines, reconstitution with membrane-targeted PLCγ2, calcium flux assay, JNK kinase assay\",\n      \"journal\": \"Immunity\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — reconstitution experiments in BLNK-deficient cells with multiple orthogonal functional readouts, mechanistic dissection of PLCγ2 vs JNK pathways\",\n      \"pmids\": [\"10023776\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"The N-terminal SH2 domain (SH2-N) of PLCγ2 is required for its association with BLNK, and this association is critical for inositol-1,4,5-trisphosphate generation upon BCR engagement. Loss of SH2-N abolishes PLCγ2-BLNK interaction and IP3 production.\",\n      \"method\": \"PLCγ2 SH2 domain mutants in PLCγ2-deficient B cells, co-immunoprecipitation, IP3 measurement, reconstitution with membrane-targeted forms\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — mutagenesis of specific domain combined with functional reconstitution in deficient cells and biochemical assays\",\n      \"pmids\": [\"10438904\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"BLNK is identified as a major binding partner of the Btk SH2 domain in B cells. The interaction between BLNK and Btk-SH2 domain contributes to complete tyrosine phosphorylation of PLCγ2 upon BCR stimulation.\",\n      \"method\": \"Affinity purification with Btk-SH2 domain, co-immunoprecipitation, tyrosine phosphorylation assays\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — biochemical identification of BLNK as Btk-SH2 binding partner with functional consequence for PLCγ2 phosphorylation, replicated by subsequent studies\",\n      \"pmids\": [\"10498607\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"BLNK is required for B cell development in vivo; BLNK-deficient mice show a block at the pro-B to pre-B cell transition. BLNK links BCR-activated Syk kinase to phosphoinositide and MAP kinase pathways.\",\n      \"method\": \"BLNK knockout mice generation, flow cytometric analysis of B cell developmental stages\",\n      \"journal\": \"Science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic knockout with defined developmental block phenotype, replicated across multiple independent knockout mouse studies\",\n      \"pmids\": [\"10583957\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"Human BLNK deficiency (homozygous splice defect) causes a developmental block at the pro-B to pre-B cell transition, with normal pro-B cells but absent pre-B and mature B cells, establishing BLNK's non-redundant role in human B cell development.\",\n      \"method\": \"Patient genetic analysis, bone marrow immunophenotyping, splice defect characterization\",\n      \"journal\": \"Science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — human loss-of-function genetics with defined cellular phenotype, replicated in subsequent human cases\",\n      \"pmids\": [\"10583958\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"BLNK mediates Syk-dependent Btk activation by acting as a scaffold: coexpression of BLNK allows Syk to phosphorylate Btk on tyrosine 551 via Btk-SH2 domain interaction with BLNK, enhancing Btk kinase activity. BCR-induced Btk phosphorylation and activation are reduced in BLNK-deficient B cells.\",\n      \"method\": \"Reconstitution cell system, BLNK-deficient B cells, Btk phosphorylation assays, kinase activity assays, mutagenesis of Btk Y551\",\n      \"journal\": \"Proceedings of the National Academy of Sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — reconstitution system with specific tyrosine mutagenesis, validated in BLNK-deficient primary B cells with biochemical readouts\",\n      \"pmids\": [\"11226282\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"BLNK is directly recruited to the BCR signaling subunit Igα through non-ITAM tyrosine Y204 (phosphorylated upon BCR ligation). The BLNK SH2 domain binds phospho-Y204 of Igα, coupling Syk activation to BLNK-dependent downstream pathways.\",\n      \"method\": \"Chimeric receptors with wild-type and mutant Igα cytoplasmic tails, co-immunoprecipitation, direct binding assays, reconstitution of downstream signaling\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — multiple orthogonal approaches including chimeric receptors, direct binding, mutagenesis, and functional reconstitution; consistent with independent study (PMID:11449366)\",\n      \"pmids\": [\"11909947\", \"11449366\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"SLP-65/BLNK associates directly with the BCR signaling subunit Igα/Igβ heterodimer; the SLP-65 SH2 domain binds phosphorylated Igα tyrosine 204 (outside the ITAM), providing a mechanism for SLP-65 membrane recruitment.\",\n      \"method\": \"Co-immunoprecipitation after B cell stimulation, domain mapping with SH2 domain of SLP-65, phosphopeptide binding\",\n      \"journal\": \"European journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct protein-protein interaction with domain mapping, corroborated by independent study (PMID:11909947)\",\n      \"pmids\": [\"11449366\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"BLNK is required for BCR-induced NF-κB activation; BLNK-deficient B cells fail to degrade IκB upon BCR stimulation, cannot induce cyclin D2/CDK4 or Bcl-xL expression, and show high spontaneous apoptosis. BLNK orchestrates a Btk-PLCγ2 signaling axis regulating NF-κB.\",\n      \"method\": \"BLNK-deficient B cells, cell cycle analysis, NF-κB reporter assays, IκB degradation assays, cyclin/CDK expression analysis\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple signaling pathway readouts in genetic knockout cells with specific molecular endpoints\",\n      \"pmids\": [\"11274146\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"BASH/BLNK links BCR signaling to activation of hematopoietic progenitor kinase 1 (HPK1): BCR ligation induces Syk/Lyn-mediated tyrosine phosphorylation of HPK1 at Y379, which then associates with the BASH SH2 domain. BASH-recruited HPK1 activates IKKβ. HPK1 activation is impaired in Syk- or BASH-deficient B cells.\",\n      \"method\": \"Co-immunoprecipitation, kinase assays, site-directed mutagenesis of HPK1 Y379, analysis in Syk- and BASH-deficient B cells\",\n      \"journal\": \"Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — biochemical interaction, mutagenesis of phosphorylation site, functional validation in knockout cells with IKKβ readout\",\n      \"pmids\": [\"11514608\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"Phosphorylation of five tyrosine residues within human BLNK nucleates distinct signaling effectors after BCR activation. Multiple tyrosine phosphorylations amplify PLCγ-mediated signaling and support 'cis'-mediated interaction between distinct signaling effectors within a large molecular complex.\",\n      \"method\": \"Systematic mutagenesis of BLNK tyrosines, reconstitution in BLNK-deficient B cells, signaling readouts (Ca2+ mobilization, MAP kinase activation)\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — systematic tyrosine mutagenesis with multiple functional readouts establishing the molecular scaffold mechanism\",\n      \"pmids\": [\"12456653\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"SLP-65/BLNK acts as a tumor suppressor in pre-B cells: SLP-65-deficient pre-B cells show enhanced IL-7-dependent proliferative capacity and SLP-65-deficient mice have high incidence of pre-B cell lymphoma. Reintroduction of SLP-65 promotes pre-BCR downregulation and enhanced differentiation.\",\n      \"method\": \"SLP-65-deficient mice analysis, ex vivo proliferation assays, retroviral reconstitution of SLP-65 expression, tumor incidence monitoring\",\n      \"journal\": \"Nature immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic knockout with reconstitution, multiple phenotypic readouts, replicated in subsequent studies\",\n      \"pmids\": [\"12436112\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"BLNK is a direct transcriptional target of the transcription factor Pax5 (BSAP); Pax5 activates BLNK expression to control pre-BCR signaling and the pro-B to pre-B cell transition.\",\n      \"method\": \"Pax5-deficient pro-B cells, BLNK restoration experiments, Pax5-BLNK promoter analysis, BLNK-estrogen receptor fusion for inducible signaling\",\n      \"journal\": \"Immunity\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct transcriptional regulation demonstrated with Pax5-deficient cells and BLNK reconstitution; inducible system for mechanistic dissection\",\n      \"pmids\": [\"12387741\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Adaptor molecules Grb2 and BLNK cooperate to localize Vav3 to membrane rafts, which is required for efficient Rac1 activation in response to BCR stimulation. Expression of raft-targeted Vav3 rescues defective Rac1 activation in Grb2- or BLNK-deficient B cells.\",\n      \"method\": \"Grb2- and BLNK-deficient B cells, Rac1 activation assays, membrane raft fractionation, raft-targeted Vav3 reconstitution\",\n      \"journal\": \"Immunity\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic deficiency models with specific reconstitution experiment establishing the mechanism of Vav3 raft localization\",\n      \"pmids\": [\"12818159\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"A conserved leucine zipper in the N-terminus of SLP-65 is responsible for its association with the plasma membrane. Alterations in the N-terminus abolish SLP-65 membrane localization and activity; replacement with a myristoylation signal restores both. The N-terminus is an autonomous domain sufficient to confer membrane localization.\",\n      \"method\": \"Mutational analysis of SLP-65 N-terminus in DT40 B cells, live cell imaging of GFP fusions, functional reconstitution assays, domain transfer experiments to SLP-76\",\n      \"journal\": \"Nature immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mutagenesis with functional reconstitution, domain transfer experiments establishing mechanism of membrane targeting\",\n      \"pmids\": [\"15654340\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"The C-terminal SH2 domain of SLP-65 controls efficient tyrosine phosphorylation by Syk, plasma membrane recruitment, and downstream signaling to NFAT. A kinase-independent adaptor function of Syk is required to link phosphorylated SLP-65 to Ca2+ mobilization, making Syk both upstream and downstream of SLP-65.\",\n      \"method\": \"SH2 domain mutational analysis in DT40 B cells, reconstitution of SLP-65 in SLP-76-deficient T cells, Ca2+ mobilization assays, NFAT reporter assays\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — dual genetic reconstitution systems, domain mutagenesis, multiple functional readouts revealing bidirectional Syk-SLP65 relationship\",\n      \"pmids\": [\"17681949\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"BLNK suppresses pre-B cell leukemia through direct binding to and inhibition of JAK3. BLNK-deficient pre-B leukemia cells have constitutively active JAK3/STAT5 due to autocrine IL-7 production; exogenous BLNK inhibits JAK3 signaling in a binding-dependent manner, inducing p27Kip1, cell cycle arrest, and apoptosis.\",\n      \"method\": \"BLNK-deficient leukemia cells, JAK3 inhibition experiments, BLNK reconstitution, co-immunoprecipitation of BLNK-JAK3, STAT5-CA transgenic mice, IL-7R signaling analyses\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct protein-protein interaction combined with functional reconstitution and in vivo transgenic validation\",\n      \"pmids\": [\"19047679\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"SLP-65 counteracts PKB/Akt activation and promotes Foxo3a and Foxo1 activity in pre-B cells, thereby enabling Ig light chain rearrangement. SLP-65-dependent signaling antagonizes PI(3)K-PKB-Foxo pathway, establishing a mechanistic link between SLP-65 and immunoglobulin recombination.\",\n      \"method\": \"SLP-65 reconstitution in deficient pre-B cells, Foxo phosphorylation analysis, PKB activity measurements, light chain recombination assays, Foxo transcription factor activity assays\",\n      \"journal\": \"Nature immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mechanistic reconstitution experiments with multiple orthogonal readouts linking SLP-65 to PI3K-PKB-Foxo pathway\",\n      \"pmids\": [\"18488031\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"SLP-65 phosphorylation occurs at multiple sites with different dynamics (early/transient, early/sustained, or late). Serine 170 phosphorylation acts as a BCR-distal checkpoint for some B cell responses but not others. Some sites are phosphorylated in resting cells and undergo rapid dephosphorylation upon BCR ligation.\",\n      \"method\": \"Mass spectrometric analysis of SLP-65 phospho-sites in DT40 B cells, site-specific mutagenesis, functional assays for B cell responses\",\n      \"journal\": \"Molecular & cellular proteomics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — MS-based phosphosite mapping combined with systematic mutagenesis and functional readouts\",\n      \"pmids\": [\"19372136\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"BLNK binds the active (GTP-loaded) form of H-Ras via a 10-amino acid Ras-binding domain. This interaction is facilitated by BCR crosslinking and is required for sustained ERK phosphorylation, BCR capping, and anti-apoptotic signaling. The Ras-binding domain fused to a CD8α-Igα chimeric receptor reconstitutes these activities in BLNK-deficient cells.\",\n      \"method\": \"Co-immunoprecipitation with active H-Ras, domain mutagenesis of BLNK Ras-binding region, reconstitution in BLNK-deficient B cells, ERK phosphorylation assays, BCR capping imaging\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — direct binding with domain mutagenesis, functional reconstitution in knockout cells, multiple orthogonal readouts\",\n      \"pmids\": [\"19218240\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"SLP65/BLNK forms a stimulation-independent, constitutive complex with CIN85. This preformed SLP65/CIN85 complex is required for SLP65 phosphorylation and its inducible plasma membrane translocation. In the absence of the SLP65/CIN85 complex, BCR-induced Ca2+ and NF-κB responses are abrogated. Mass spectrometry identified ~30 SLP65 interaction partners with predominantly dynamic interactions.\",\n      \"method\": \"Quantitative in vivo interactomics by mass spectrometry, co-immunoprecipitation, live cell imaging, CIN85 knockout B cells, Ca2+ flux assays, NF-κB reporter assays\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — quantitative mass spectrometry interactome combined with live imaging, reciprocal co-IP, and functional knockout validation with multiple signaling readouts\",\n      \"pmids\": [\"21822214\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"HPK1 phosphorylates BLNK at threonine 152, which mediates BLNK binding to 14-3-3 proteins. Threonine 152-phosphorylated BLNK is subsequently ubiquitinated at lysines 37, 38, and 42, leading to its degradation and attenuation of MAPK and IKK activation in B cells during BCR signaling.\",\n      \"method\": \"HPK1-deficient B cells, site-directed mutagenesis of BLNK T152 and K37/38/42, ubiquitination assays, co-immunoprecipitation with 14-3-3, signaling assays\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — specific residue mutagenesis, ubiquitination assays, 14-3-3 binding, validated in HPK1-deficient cells with functional signaling readouts\",\n      \"pmids\": [\"22334673\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"CMTM7 (a tetra-spanning membrane protein) co-localizes with sIgM at the plasma membrane and acts as a transmembrane linker between sIgM and BLNK. CMTM7 knockdown impairs BLNK-Syk interaction and BLNK tyrosine phosphorylation, and a C-terminal deletion of CMTM7 (defective in membrane localization) abolishes these functions, while N-terminal deletion does not.\",\n      \"method\": \"RNAi knockdown of CMTM7, reconstitution with CMTM7 mutants (ΔN, ΔC), co-immunoprecipitation of BLNK-Syk and CMTM7-sIgM-BLNK complexes, JNK/ERK activation assays, fluorescence colocalization\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — domain-specific mutagenesis of CMTM7 with rescue experiments, multiple co-IP interactions, and functional signaling readouts\",\n      \"pmids\": [\"22363743\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"The C2 domain of PLCγ2 binds in a Ca2+-regulated manner to a distinct phosphotyrosine of SLP65, providing feed-forward signal amplification. Early Ca2+ flux promotes C2 domain anchoring to phospho-SLP65, amplifying PLCγ2 activity; as Ca2+ resources are exhausted, the C2-phosphotyrosine interaction terminates despite sustained SLP65 phosphorylation.\",\n      \"method\": \"PLCγ2 C2 domain mutational analysis, Ca2+ flux assays, co-immunoprecipitation of PLCγ2-SLP65, biochemical binding studies\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — domain mutagenesis with Ca2+-regulated binding mechanism established by biochemical and functional assays\",\n      \"pmids\": [\"24166973\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"SLP-65 associates with intracellular vesicles in resting B cells via a ~50 amino acid N-terminal module. NMR spectroscopy showed the N-terminus is structurally disordered in solution but binds in a structured manner to noncharged lipid components of cellular membranes. Vesicle-associated preformed signaling scaffolds are required for B cell activation.\",\n      \"method\": \"Subcellular fractionation, live cell imaging, NMR spectroscopy of SLP-65 N-terminal domain with membrane lipids, mutational analysis, B cell activation assays\",\n      \"journal\": \"Science signaling\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — NMR structural analysis combined with live imaging and mutagenesis revealing vesicular localization mechanism\",\n      \"pmids\": [\"25140054\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"In CLL cells, BLNK forms a complex with CK2, CD5, and STAT3. CK2 phosphorylates STAT3 on serine 727 constitutively in CLL cells; this requires co-expression of CD5 and BLNK (not present in normal B or T cells). siRNA knockdown of CD5 or BLNK, or CD5-neutralizing antibodies, significantly reduced serine-phosphorylated STAT3. The CK2/CD5/BLNK/STAT3 complex is cytoplasmic; serine-phosphorylated STAT3 translocates to the nucleus.\",\n      \"method\": \"Mass spectrometry co-immunoprecipitation, CK2 in vitro kinase assay with recombinant STAT3, siRNA knockdown, confocal microscopy, subcellular fractionation\",\n      \"journal\": \"Molecular cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — in vitro kinase assay combined with co-IP complex identification, RNAi functional validation, and subcellular localization by multiple methods\",\n      \"pmids\": [\"28130399\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"The crystal structure of a BLNK pT152 peptide bound to 14-3-3σ was solved. Biophysical assays (fluorescence polarization, ITC) showed that BLNK interacts with 14-3-3 via a gatekeeper model: HPK1-mediated phosphorylation of T152 anchors BLNK to 14-3-3, and additional AKT-mediated phosphorylation of S285 further improves affinity.\",\n      \"method\": \"X-ray crystallography of BLNK peptide-14-3-3σ complex, fluorescence polarization, isothermal titration calorimetry with mono- and di-phosphorylated BLNK peptides\",\n      \"journal\": \"Journal of structural biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — crystal structure with biophysical binding data establishing mechanism of 14-3-3 interaction; single lab but multiple orthogonal methods\",\n      \"pmids\": [\"33176192\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"ECM detachment of non-malignant breast epithelial cells upregulates BLNK; ErbB2 blocks this upregulation by reducing IRF6 levels. BLNK promotes anoikis by activating p38 MAP kinase. ErbB2-dependent BLNK downregulation blocks breast cancer cell anoikis, and BLNK upregulation blocks tumor formation in mice.\",\n      \"method\": \"ErbB2 overexpression/knockdown, IRF6 manipulation, BLNK forced expression/knockdown, p38 inhibitor experiments, anoikis assays, 3D tumor growth, in vivo tumor formation\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — mechanistic pathway established in non-B cell context with multiple readouts but single lab\",\n      \"pmids\": [\"35933456\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"BLNK is a positive regulator of Met receptor signaling in NSCLC cells: BLNK modulates Met localization and ligand-dependent trafficking. The BLNK-GRB2 constitutive interaction is increased by active Met, and the Met-GRB2 interaction is increased in the presence of BLNK. BLNK contributes to anchorage-independent growth and chemotaxis of NSCLC cells.\",\n      \"method\": \"Mammalian Membrane Two-Hybrid (MaMTH) assay, BLNK knockdown, Met trafficking assays, co-immunoprecipitation of BLNK-GRB2 and Met-GRB2, anchorage-independent growth assays, chemotaxis assays\",\n      \"journal\": \"iScience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — MaMTH interaction assay combined with functional knockdown and signaling assays in non-canonical cell type; single lab\",\n      \"pmids\": [\"36388990\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"SLP65 and CIN85 form phase-separated condensates at intracellular vesicles in resting B cells via 6 proline-rich motifs (PRMs) of SLP65 interacting with 3 SH3 domains of CIN85 (18 individual SH3-PRM interactions). Quantified individual dissociation constants of these interactions model the phase-separation behavior. A previously unknown intramolecular interaction was also identified.\",\n      \"method\": \"Biophysical measurement of individual SH3-PRM dissociation constants, LASSI phase-separation modeling, designer construct analysis, identification of intramolecular interaction\",\n      \"journal\": \"PNAS nexus\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — rigorous biophysical quantification of multivalent interactions combined with computational modeling of phase separation, single lab but multiple orthogonal methods\",\n      \"pmids\": [\"38463037\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"In macrophages, CLR (C-type lectin receptor) signaling activates Syk-mediated BLNK activation, which impedes macrophage migration by disrupting podosome ring formation. BLNK associates with c-Cbl and competitively disrupts Fyn-c-Cbl interaction, blocking Fyn-mediated c-Cbl phosphorylation and c-Cbl-associated F-actin assembly. BLNK deficiency in monocytes enhances macrophage migration and resistance to Candida albicans infection.\",\n      \"method\": \"Monocyte-specific BLNK conditional knockout mice, co-immunoprecipitation of BLNK-c-Cbl and Fyn-c-Cbl, podosome ring imaging, macrophage migration assays, Candida albicans infection model, F-actin assembly assays\",\n      \"journal\": \"Proceedings of the National Academy of Sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional knockout mice, co-IP competition assays, in vivo infection model, multiple orthogonal mechanistic assays establishing BLNK-c-Cbl-Fyn pathway\",\n      \"pmids\": [\"39413134\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"In EBV-latently infected B cells, LMP2A causes constitutive tyrosine phosphorylation of one SLP-65 isoform and complex formation between SLP-65 and CrkL, leading to Cbl and C3G phosphorylation. However, PLCγ2 activation is completely blocked by LMP2A, demonstrating selective activation and repression of distinct SLP-65-regulated signaling pathways.\",\n      \"method\": \"Mouse model of LMP2A expression, biochemical analysis of SLP-65 phosphorylation and complex formation, PLCγ2 activation assays\",\n      \"journal\": \"Journal of experimental medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo mouse model with biochemical dissection of signaling pathways; novel context but single lab\",\n      \"pmids\": [\"11489945\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"The two human SLP-65 isoforms differ functionally: the long isoform contains an atypical SH3-binding motif that mediates Grb2 association and suppresses p38/JNK MAP kinase activation and c-Fos expression, whereas the short isoform more potently activates AP1- and NF-κB-driven transcription. The long isoform promotes BCR-induced apoptosis more than the short isoform.\",\n      \"method\": \"Reconstitution of SLP-65 isoforms in SLP-65-deficient B cells, kinase activity assays, reporter gene assays, mutagenesis of SH3-binding motif, apoptosis assays\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — isoform-specific reconstitution with domain mutagenesis and multiple functional readouts; single lab\",\n      \"pmids\": [\"16912232\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"BNAS2, a novel protein with four transmembrane domains and MARVEL domain localizing to the ER, binds the conserved N-terminal domain of BASH/BLNK, co-precipitates with Btk and ERK2, and overexpression enhances BCR-induced Elk1 but not NF-κB transcriptional activation.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation from B cell lysates, confocal microscopy, transcriptional reporter assays in DT40 B cells\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — yeast two-hybrid and single co-IP with limited functional follow-up; single lab\",\n      \"pmids\": [\"15087455\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"BNAS1, a novel protein with four transmembrane domains and a leucine zipper, binds the conserved N-terminal domain of BASH/BLNK via its LZ motif and localizes to the ER and nuclear envelope. BNAS1 overexpression suppresses BCR-induced Elk-1 activation; BNAS1-deficient DT40 cells show augmented Elk-1 activation that is selectively blocked by JNK inhibitor.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, confocal microscopy, BNAS1-deficient DT40 cells, reporter assays, JNK inhibitor experiments\",\n      \"journal\": \"International immunology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — co-IP and knockout cell line with limited mechanistic follow-up; single lab\",\n      \"pmids\": [\"16481341\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"SLP65 induces RHOA activity in pre-B cells, which activates PTEN by enabling its translocation to the plasma membrane, thereby counteracting PI3K signaling. This SLP65-RHOA-PTEN axis is required for pre-B cell development and survival.\",\n      \"method\": \"Conditional RhoA-deficient mice, SLP65-deficient B cells, PTEN localization by imaging, reconstitution with RhoA and Foxo1, in vitro and in vivo survival assays\",\n      \"journal\": \"Frontiers in immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — conditional knockout mice with reconstitution experiments and PTEN localization imaging; single lab\",\n      \"pmids\": [\"35371049\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"BASH/BLNK mediates a pre-BCR signaling pathway involving novel PKC (nPKC) and MEK (but not Ras) to induce kappa light chain gene rearrangement. Reconstitution of BLNK in pre-B leukemia cells or PMA treatment induces PKCη translocation to the plasma membrane and kappa gene rearrangement.\",\n      \"method\": \"BASH-deficient pre-B leukemia cell lines, specific inhibitors for nPKC/MEK/Ras, retroviral transduction of active PKCη/PKCε/Raf-1, tamoxifen-inducible BASH reconstitution, kappa chain expression assays\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological dissection of pathway combined with reconstitution with active kinase constructs; single lab\",\n      \"pmids\": [\"16794253\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"BLNK is expressed in macrophages and becomes tyrosine-phosphorylated upon FcγRI and FcγRII/III ligation, indicating coupling to FcγR signaling pathways in these cells.\",\n      \"method\": \"Flow cytometry and Western blotting for BLNK expression in macrophages, FcγR ligation experiments, tyrosine phosphorylation assays\",\n      \"journal\": \"Proceedings of the National Academy of Sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — expression and phosphorylation in macrophages established by direct experiment; replicated in subsequent study\",\n      \"pmids\": [\"10677525\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"BLNK/SLP-65 is a central scaffold adaptor protein in B cells that is phosphorylated on multiple tyrosine residues by Syk upon BCR activation; it is recruited to the BCR via direct binding of its SH2 domain to phospho-Y204 of Igα, facilitated by the transmembrane protein CMTM7, and pre-positioned at intracellular vesicles through its N-terminal leucine zipper/lipid-binding module in complex with CIN85 (which phase-separates with SLP65 via multivalent SH3-PRM interactions); once phosphorylated, BLNK nucleates a large signaling complex that activates PLCγ2 (via SH2-N and Ca2+-regulated C2 domain interactions), Btk (by serving as a scaffold enabling Syk to phosphorylate Btk-Y551), Vav/Rac1 (via Grb2-dependent membrane raft localization), H-Ras/ERK (via a direct Ras-binding domain), HPK1/IKKβ (via SH2-domain recruitment of phospho-HPK1), and NF-κB, while negative regulation is achieved by HPK1-mediated phosphorylation of BLNK-T152 promoting 14-3-3 binding and subsequent ubiquitination at K37/38/42 and proteasomal degradation; in pre-B cells BLNK also antagonizes PI3K-PKB-Foxo signaling via RHOA-PTEN and directly inhibits JAK3 to suppress IL-7-driven proliferation and prevent leukemogenesis, and in macrophages CLR-activated BLNK inhibits migration by associating with c-Cbl to disrupt Fyn-mediated F-actin assembly.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"BLNK (also SLP-65/BASH) is the central cytoplasmic scaffold adaptor that couples the activated B cell antigen receptor to its downstream effector machinery, and its loss arrests B lymphopoiesis at the pro-B to pre-B transition in both mice and humans [#0, #5, #6]. Upon BCR engagement, the Syk tyrosine kinase phosphorylates BLNK on multiple tyrosines that act as docking sites, converting it into a nucleation platform for SH2-containing effectors including PLCγ2, Vav, Grb2, and Nck [#0, #12]. BLNK is recruited to the receptor through its C-terminal SH2 domain binding phospho-Y204 of the Igα signaling subunit outside the ITAM, with the tetraspanning membrane protein CMTM7 acting as a transmembrane linker between surface IgM and BLNK [#8, #9, #24]. Membrane and vesicle positioning is set before stimulation by an N-terminal leucine-zipper/lipid-binding module that associates with intracellular vesicles and the plasma membrane, working within a constitutive SLP65/CIN85 complex that phase-separates through multivalent SH3–proline-rich-motif interactions and is required for BLNK phosphorylation and inducible membrane translocation [#16, #22, #26, #31]. Once assembled, BLNK drives PLCγ2 activation by anchoring its N-terminal SH2 and Ca2+-regulated C2 domains [#2, #3, #25], serves as the scaffold that lets Syk phosphorylate Btk-Y551 to activate Btk [#4, #7], localizes Vav3 to membrane rafts for Rac1 activation [#15], binds GTP-loaded H-Ras through a discrete Ras-binding domain to sustain ERK signaling [#21], and recruits phospho-HPK1 to activate IKKβ and NF-κB, controlling cell-cycle and survival gene expression [#10, #11]. BLNK output is curtailed by an HPK1–14-3-3–ubiquitination circuit: HPK1 phosphorylates BLNK-T152 to create a 14-3-3 docking site, promoting ubiquitination at K37/38/42 and proteasomal degradation [#23, #28]. In pre-B cells BLNK is a Pax5 target that functions as a tumor suppressor, restraining IL-7-driven proliferation by directly inhibiting JAK3 and antagonizing PI3K–PKB–Foxo signaling to permit immunoglobulin light-chain rearrangement [#13, #14, #18, #19]. Beyond B cells, BLNK couples C-type lectin/Syk signaling in macrophages to inhibition of migration via c-Cbl–Fyn antagonism [#32].\",\n  \"teleology\": [\n    {\n      \"year\": 1998,\n      \"claim\": \"Established BLNK's foundational identity as the adaptor bridging BCR-activated Syk to downstream effectors, defining the core of B cell signaling architecture.\",\n      \"evidence\": \"Co-immunoprecipitation and biochemical pulldowns in B cells identifying Syk-induced tyrosine phosphorylation and binding of PLCγ, Vav, Grb2, and Nck\",\n      \"pmids\": [\"9697839\", \"9705962\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not map which specific tyrosines bind which effectors\", \"Did not establish in vivo developmental requirement\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"Showed BLNK is functionally required for BCR-induced PLCγ2 and JNK activation and acts by controlling PLCγ2 membrane localization via its SH2-N interaction.\",\n      \"evidence\": \"Reconstitution of BLNK-deficient and PLCγ2-deficient B cell lines with membrane-targeted or domain-mutant PLCγ2, calcium flux, IP3 and JNK assays\",\n      \"pmids\": [\"10023776\", \"10438904\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of Rac1 contribution to JNK not resolved\", \"Structural basis of SH2-N/BLNK contact not defined\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"Demonstrated BLNK is non-redundantly required for B cell development in vivo in both mouse and human, fixing its place at the pro-B to pre-B checkpoint.\",\n      \"evidence\": \"BLNK knockout mice and human homozygous splice-defect patient analysis with developmental immunophenotyping\",\n      \"pmids\": [\"10583957\", \"10583958\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Which downstream pathway failure causes the block not pinpointed\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Resolved how BLNK is recruited to the receptor and how it activates Btk, NF-κB, and HPK1/IKKβ, converting it from a binding hub into a defined signal-routing platform.\",\n      \"evidence\": \"Chimeric Igα receptors with mutant Y204, scaffold reconstitution of Syk-mediated Btk-Y551 phosphorylation, and analysis of NF-κB/IκB and HPK1 in deficient B cells\",\n      \"pmids\": [\"11909947\", \"11449366\", \"11226282\", \"11274146\", \"11514608\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Spatial coordination of these parallel complexes on one BLNK molecule not directly visualized\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Defined the multi-tyrosine scaffold logic of BLNK and established its tumor-suppressor role downstream of Pax5 in pre-B cells.\",\n      \"evidence\": \"Systematic tyrosine mutagenesis with signaling readouts, plus SLP-65-deficient mouse lymphoma analysis and Pax5-dependent transcriptional regulation studies\",\n      \"pmids\": [\"12456653\", \"12436112\", \"12387741\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular target of tumor-suppressor activity not yet identified in 2002\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Defined how BLNK directs Rac1 activation by cooperating with Grb2 to localize Vav3 to membrane rafts.\",\n      \"evidence\": \"Grb2- and BLNK-deficient B cells with raft fractionation and raft-targeted Vav3 rescue of Rac1 activation\",\n      \"pmids\": [\"12818159\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct BLNK-Vav3 versus Grb2-bridged interaction not fully separated\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Identified the N-terminal leucine zipper as an autonomous membrane-targeting module, explaining how BLNK is pre-positioned for signaling.\",\n      \"evidence\": \"N-terminus mutagenesis, GFP live imaging, myristoylation rescue, and domain transfer to SLP-76 in DT40 cells\",\n      \"pmids\": [\"15654340\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Lipid/membrane partner of the leucine zipper not yet identified at this stage\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Revealed a bidirectional Syk-BLNK relationship in which the BLNK C-terminal SH2 domain governs phosphorylation and membrane recruitment while Syk also acts as a downstream adaptor for Ca2+/NFAT signaling.\",\n      \"evidence\": \"SH2 mutagenesis in DT40 cells and SLP-65 reconstitution in SLP-76-deficient T cells with Ca2+ and NFAT readouts\",\n      \"pmids\": [\"17681949\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of kinase-independent Syk adaptor role not defined\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Established the mechanistic basis of BLNK tumor suppression and its role in light-chain rearrangement via JAK3 inhibition and PI3K-PKB-Foxo antagonism.\",\n      \"evidence\": \"BLNK-deficient leukemia cells with reconstitution, BLNK-JAK3 co-IP, STAT5-CA transgenic mice, and Foxo/PKB activity and recombination assays in pre-B cells\",\n      \"pmids\": [\"19047679\", \"18488031\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How BLNK both scaffolds activating BCR signals and suppresses cytokine signaling in the same cell not reconciled\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Defined the H-Ras-binding domain enabling sustained ERK signaling and mapped temporally distinct BLNK phosphorylation dynamics including serine checkpoints.\",\n      \"evidence\": \"H-Ras co-IP with domain mutagenesis and chimeric receptor rescue, plus MS phosphosite mapping with site-specific mutagenesis in DT40 cells\",\n      \"pmids\": [\"19218240\", \"19372136\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Kinases for individual serine sites not all assigned\", \"Physiological trigger of resting-state dephosphorylation unclear\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Showed BLNK functions within a constitutive, preformed SLP65/CIN85 complex required for its own phosphorylation and inducible membrane translocation.\",\n      \"evidence\": \"Quantitative in vivo interactomics, CIN85-knockout B cells, live imaging, and Ca2+/NF-κB functional readouts\",\n      \"pmids\": [\"21822214\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physical organization of the preformed complex not yet structurally resolved\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Defined the negative-feedback circuit terminating BLNK signaling and identified CMTM7 as the transmembrane linker coupling surface IgM to BLNK-Syk.\",\n      \"evidence\": \"HPK1-deficient cells with T152/K37-42 mutagenesis and ubiquitination assays, and CMTM7 knockdown/mutant rescue with co-IP and signaling readouts\",\n      \"pmids\": [\"22334673\", \"22363743\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"E3 ligase responsible for K37/38/42 ubiquitination not identified\", \"How CMTM7 coordinates with Igα-Y204 recruitment not resolved\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Resolved a Ca2+-regulated feed-forward loop in which the PLCγ2 C2 domain anchors to a distinct BLNK phosphotyrosine to amplify and then self-terminate signaling.\",\n      \"evidence\": \"PLCγ2 C2 domain mutagenesis, Ca2+ flux, and PLCγ2-SLP65 binding assays\",\n      \"pmids\": [\"24166973\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of the specific BLNK phosphotyrosine bound by C2 not fully pinned\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Showed BLNK associates with intracellular vesicles in resting cells through a disordered N-terminal module that folds upon binding noncharged membrane lipids, establishing vesicular preformed scaffolds.\",\n      \"evidence\": \"Subcellular fractionation, live imaging, and NMR of the N-terminal domain with membrane lipids in B cells\",\n      \"pmids\": [\"25140054\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of the specific vesicle compartment not defined\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Provided the biophysical basis for vesicular scaffold formation through SLP65/CIN85 multivalent phase separation and extended BLNK function to macrophage migration control.\",\n      \"evidence\": \"Quantified SH3-PRM dissociation constants with phase-separation modeling, and monocyte-specific BLNK knockout mice with c-Cbl/Fyn co-IP and Candida infection model\",\n      \"pmids\": [\"38463037\", \"39413134\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo relevance of phase separation to B cell activation not directly tested\", \"Whether macrophage c-Cbl/Fyn mechanism generalizes to other receptors unclear\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How BLNK's positive BCR-scaffolding role and its context-dependent tumor-suppressor/anoikis-promoting and oncogenic-cooperative functions in non-B-cell cancers are mechanistically integrated remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Non-B-cell roles (breast anoikis, NSCLC Met signaling, CLL CK2/CD5/STAT3) rest on single-lab studies\", \"No unifying structural model of the full activated BLNK signaling complex\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 12, 22]},\n      {\"term_id\": \"GO:0008289\", \"supporting_discovery_ids\": [16, 26]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [4, 7, 18]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [16, 22, 24]},\n      {\"term_id\": \"GO:0031410\", \"supporting_discovery_ids\": [26, 31]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [27]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [0, 2, 5, 12]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [10, 15, 21]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [5, 6, 13, 14, 19]}\n    ],\n    \"complexes\": [\n      \"SLP65/CIN85 complex\",\n      \"CK2/CD5/BLNK/STAT3 complex\"\n    ],\n    \"partners\": [\n      \"SYK\",\n      \"PLCG2\",\n      \"BTK\",\n      \"GRB2\",\n      \"CIN85\",\n      \"CD79A\",\n      \"HPK1\",\n      \"CMTM7\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":8,"faith_total":8,"faith_pct":100.0}}