| 1995 |
SLP-76 (LCP2) was molecularly cloned as a 76 kDa hematopoietic-specific adaptor protein containing a C-terminal SH2 domain; it directly associates with Grb2 via in vitro GST pulldown, and its SH2 domain precipitates tyrosine phosphoproteins from T cell lysates including PLC-γ1-associated proteins. |
Molecular cloning, GST fusion protein pulldown, co-immunoprecipitation, in vitro translation |
The Journal of biological chemistry |
High |
7706237
|
| 1996 |
ZAP-70 phosphorylates SLP-76 in vitro and in heterologous cell systems; SLP-76 phosphorylation is diminished when catalytically inactive ZAP-70 is expressed. SLP-76 overexpression hyperactivates the TCR, while a non-phosphorylatable SLP-76 attenuates signaling. The SH2 domain of SLP-76 is independently required for TCR function. |
In vitro kinase assay, dominant-negative ZAP-70 expression, overexpression/mutagenesis in T cell lines, reporter gene assay |
The Journal of biological chemistry |
High |
8702662
|
| 1996 |
SLP-76 directly associates with Vav via the Vav SH2 domain binding to phosphorylated SLP-76; co-overexpression of Vav and SLP-76 synergistically induces NF-AT activation, placing SLP-76 in a complex with Vav during TCR signaling. |
Co-immunoprecipitation, overexpression, NF-AT reporter assay in Jurkat cells |
Immunity |
High |
8673706
|
| 1996 |
TCR engagement leads to tyrosine phosphorylation of SLP-76 at its N-terminal acidic region; tyrosines Y113 and Y128 (YESP motifs) and Y145 are phosphorylated, with Y145 being the most important for NF-AT promoter activity. |
Site-directed mutagenesis, TCR stimulation, NF-AT reporter assay in Jurkat cells |
Journal of immunology |
High |
8892604
|
| 1996 |
SLP-76 is required for optimal TCR-induced activation of PLC-γ1 and Ras pathways; an SLP-76-deficient T cell line showed that SLP-76 is not required for general tyrosine phosphorylation but is specifically required for PLC-γ1 phosphorylation and TCR-inducible gene expression. |
SLP-76-deficient cell line (genetic loss), phosphorylation assays, gene expression reporter |
Science |
High |
9665884
|
| 1996 |
Grb2 constitutively associates with unphosphorylated SLP-76; the SH2 domain of SLP-76 associates with 62 kDa and 130 kDa tyrosine-phosphorylated proteins and a serine/threonine kinase after TCR stimulation. |
Co-immunoprecipitation, GST-SH2 domain pulldown, in vitro binding |
The Journal of experimental medicine |
Medium |
8666952
|
| 1996 |
SHP-1 constitutively associates with SLP-76 in B cells via SHP-1 SH2 domains; BCR ligation induces tyrosine phosphorylation of SLP-76 and SHP-1. |
Co-immunoprecipitation, GST-SH2 domain pulldown, Western blot |
The Journal of experimental medicine |
Medium |
8760799
|
| 1997 |
ZAP-70 phosphorylates two YESP motifs of SLP-76 (Y113 and Y128) to create binding sites for the Vav SH2 domain; a third motif (Y145, pYEPP) fails to bind Vav SH2. Vav-SLP-76 binding is not absolutely required for IL-2 production in all T cells. |
In vitro kinase assay, phosphopeptide binding, overexpression in T cell hybridoma |
Immunity |
High |
9047237
|
| 1997 |
SLAP-130 (FYB/ADAP) is a 130 kDa SLP-76-associated phosphoprotein that interacts via the SH2 domain of SLP-76; overexpression of SLAP-130 negatively regulates TCR-induced IL-2 promoter activity and counteracts SLP-76 augmentation of signaling. |
Molecular cloning, co-immunoprecipitation with SH2 domain, reporter gene assay |
The Journal of biological chemistry |
Medium |
9115214
|
| 1997 |
SLP-76 function requires three distinct protein-interaction domains (N-terminal tyrosine-containing acidic region, proline-rich region, C-terminal SH2 domain) for optimal augmentation of TCR-induced NF-AT activity and ERK activation. |
Domain deletion mutagenesis, overexpression in Jurkat cells, reporter gene assay, kinase assay |
Journal of immunology |
Medium |
9257823
|
| 1998 |
SLP-76 is required for normal T cell development; SLP-76-null mice have a complete block in thymopoiesis at an early stage with no peripheral T cells, establishing SLP-76 as an essential signal transducer for pre-TCR signaling. |
Targeted gene knockout in mice, flow cytometry of thymic populations |
Science |
High |
9665885 9695951
|
| 1998 |
SLP-76 interacts with Nck (an adaptor protein) and Vav (a GEF for Rho-family GTPases), forming a trimolecular complex that activates PAK1 (p21-activated kinase 1) and facilitates actin polymerization downstream of the TCR. |
Co-immunoprecipitation, PAK1 kinase assay, actin polymerization assay |
Immunity |
High |
9846482
|
| 1998 |
SLP-76 is a direct substrate of SHP-1 in T cells and NK cells; SHP-1, recruited to killer cell inhibitory receptors, dephosphorylates SLP-76, and tyrosine-phosphorylated SLP-76 is required for optimal cytotoxic lymphocyte activation. |
Direct binding assay (SHP-1 catalytic domain on SLP-76), functional inhibitory receptor co-engagement assays |
The Journal of biological chemistry |
Medium |
9765283
|
| 1998 |
SLP-76 is required for optimal PLC-γ2 activation in platelets downstream of the collagen receptor; SLP-76-deficient platelets show impaired collagen-induced platelet aggregation, granule release, and PLC-γ2 tyrosine phosphorylation. |
SLP-76 KO mouse platelets, platelet aggregation assay, phosphorylation assay, granule release assay |
The Journal of clinical investigation |
High |
9884330
|
| 1999 |
Gads (Grb2-related adaptor) constitutively interacts with SLP-76 via the C-terminal SH3 domain of Gads and a proline-rich region of SLP-76; Gads also binds tyrosine-phosphorylated LAT via its SH2 domain, bridging LAT and SLP-76 and promoting T cell signaling. |
Co-immunoprecipitation, domain mapping, NF-AT reporter assay |
Current biology |
High |
10021361
|
| 1999 |
SLP-76 deficiency in mast cells impairs FcεRI-mediated signaling: SLP-76-null BMMCs fail to release β-hexosaminidase and IL-6, and show reduced PLC-γ1 tyrosine phosphorylation and calcium mobilization after FcεRI cross-linking, while Syk phosphorylation is normal. |
SLP-76 KO mouse mast cells, degranulation assay, cytokine secretion, phosphorylation assay, calcium flux |
The Journal of clinical investigation |
High |
10377180
|
| 1999 |
In platelets, tyrosine phosphorylation of SLP-76 by the collagen receptor pathway is downstream of Syk; SLP-76 co-immunoprecipitates with SLAP-130, Vav, Fyn, Lyn, and the FcR γ-chain after collagen stimulation, and SLP-76 deficiency abrogates PLC-γ2 phosphorylation and Ca2+ mobilization. |
Syk-deficient platelet analysis, co-immunoprecipitation, in vitro kinase assay, calcium mobilization |
The Journal of biological chemistry |
High |
10026222
|
| 1999 |
Nck SH2 domain interacts with tyrosine-phosphorylated SLP-76 in activated T cells; phosphopeptides corresponding to Y113 and Y128 of SLP-76 compete binding of SLP-76 to the Nck SH2 domain. |
Co-immunoprecipitation, phosphopeptide competition, in vitro binding |
European journal of immunology |
Medium |
10229072
|
| 1999 |
FYN-T selectively phosphorylates FYB/SLAP, creating binding sites for the SH2 domains of FYN-T and SLP-76; co-expression of FYN-T, FYB, and SLP-76 synergistically up-regulates IL-2 transcription via TCR ligation. |
In vitro kinase assay, co-immunoprecipitation, NF-AT/IL-2 reporter assay |
The Journal of biological chemistry |
Medium |
10409671
|
| 1999 |
SLP-76 SH2 domain binds HPK1 at Tyr379; HPK1 interacts with SLP-76 in T cells and inhibits AP-1 activation in an SLP-76 SH2-domain-dependent manner, integrating HPK1 into antigen receptor signaling cascades. |
Yeast two-hybrid, co-immunoprecipitation, reporter gene assay, homology modeling |
The Journal of biological chemistry |
Medium |
11487585
|
| 1999 |
GrpL (Grb2-related adaptor) co-immunoprecipitates with SLP-76 but not with Sos1/2 in Jurkat cells; GrpL cooperates with SLP-76 to augment NF-AT activation, defining a distinct Grb2-like adaptor complex with SLP-76. |
Co-immunoprecipitation, NF-AT reporter assay |
The Journal of experimental medicine |
Medium |
10209041
|
| 2000 |
Fyb/SLAP (FYB/ADAP) links TCR signaling to actin cytoskeleton remodeling by acting as a ligand for Ena/VASP EVH1 domains; upon TCR engagement, Fyb/SLAP localizes to the T cell-APC interface within complexes containing WASP, Nck, and SLP-76. |
Co-immunoprecipitation, confocal microscopy, WASP/Arp2/3 inhibition, biochemical fractionation |
The Journal of cell biology |
High |
10747096
|
| 2000 |
SLP-76 recruitment to glycolipid-enriched membrane microdomains (GEMs) requires amino acids 224-244 of SLP-76 and is critical for TCR signaling; forced membrane localization of SLP-76 via a LAT/SLP-76 chimera reconstitutes PLC-γ1 phosphorylation, ERK activation, and NF-AT activity in LAT-deficient cells. |
Chimeric protein expression, fractionation into GEMs, reporter gene assay, phosphorylation assays |
The Journal of experimental medicine |
High |
11015445
|
| 2000 |
SLP-76 relays signals from platelet integrin αIIbβ3 to the actin cytoskeleton: fibrinogen binding triggers Syk-dependent SLP-76 phosphorylation, which promotes SLP-76 association with Nck and Vav1, lamellipodia formation, and PAK kinase activation. |
CHO cell expression system, co-immunoprecipitation, PAK kinase assay, microscopy |
The Journal of biological chemistry |
High |
11113155
|
| 2001 |
SLP-76 directly interacts with the SH3 domain of PLC-γ1 via a proline-rich 'P-1 domain' (67 amino acids); this interaction is constitutive and required for TCR-mediated ERK, PLC-γ1, and NF-AT activation. The Gads-binding domain of SLP-76 mediates inducible recruitment to a PLC-γ1-LAT complex. |
Mutagenesis, co-immunoprecipitation, reporter gene assay, reconstitution in SLP-76-deficient cells |
Molecular and cellular biology |
High |
11390650
|
| 2001 |
SLAP-130 (FYB/ADAP) interaction with SLP-76 requires phospho-Y559 of SLAP-130; this interaction is important for the negative regulatory role of SLAP-130, specifically inhibiting TCR-induced ERK activation but not PLC-γ1 phosphorylation. |
Mutagenesis, co-immunoprecipitation, ERK activation assay, NF-AT reporter assay |
The Journal of biological chemistry |
Medium |
10671560
|
| 2001 |
WASP recruitment to the T cell-APC contact site requires Nck (via WASP proline-rich domain), while WASP activation requires Vav-1 for localized Cdc42 activation; SLP-76 coordinates both events by acting as a scaffold bringing Nck and WASP near Vav-1/Cdc42-GTP. |
Vav-1-deficient T cells, microscopy of WASP localization, co-immunoprecipitation, Cdc42 activation assay |
Journal of immunology |
High |
12874226
|
| 2001 |
GADS is required for coupling SLP-76 to LAT in T cells; GADS-deficient thymocytes fail to respond to CD3 cross-linking and the association between SLP-76 and LAT is uncoupled, establishing GADS as the physical bridge between SLP-76 and LAT. |
GADS KO mice, co-immunoprecipitation, thymocyte proliferation assay, in vivo selection assays |
Science |
High |
11239162
|
| 2001 |
SLP-76 mediates signaling via Fcγ receptors and integrins in neutrophils; SLP-76-deficient neutrophils show decreased FcγR-induced calcium flux and reactive oxygen intermediate production, and fail to produce ROI, spread, or activate key downstream regulators upon integrin ligation. |
SLP-76 KO mouse neutrophils, calcium flux, ROI production assay, spreading assay |
Immunity |
High |
14614862
|
| 2002 |
The RxxK motif in SLP-76 (R237 and K240) mediates high-affinity binding to the C-terminal SH3 domain of Gads; single point mutations in R237 or K240 abrogate SLP-76/Gads association in vivo and impair SLP-76 function in TCR signaling. |
Peptide array, in vitro binding (Kd measurement), site-directed mutagenesis, co-immunoprecipitation, NF-AT reporter assay |
Current biology |
High |
12176364
|
| 2003 |
Crystal structure (1.7 Å) of the Mona/Gads C-terminal SH3 domain complexed with a SLP-76 peptide reveals a novel non-proline-type II helix binding mode: the SLP-76 RSTK peptide forms a 3(10) helix inserting into a negatively charged double pocket on the SH3 domain. |
X-ray crystallography (1.7 Å resolution), mutagenesis, in vitro binding |
The EMBO journal |
High |
12773374
|
| 2003 |
NMR solution structure of the Gads C-terminal SH3 domain in complex with an SLP-76 RSTK-containing peptide shows the peptide adopts a right-handed 3(10) helix at the RSTK locus engaging four distinct binding pockets, confirming a novel mode of SH3 recognition. |
NMR structure determination, mutagenesis, peptide binding assay |
Molecular cell |
High |
12620234
|
| 2003 |
SLP-76 deficiency causes failure of blood-lymphatic vascular separation in mice; SLP-76 is required in hematopoietic cells (not endothelial cells) for this separation, as bone marrow reconstitution with SLP-76-deficient cells confers blood-filled lymphatics in wild-type mice. |
SLP-76 KO mice, bone marrow reconstitution, vascular histology |
Science |
High |
12522250
|
| 2004 |
ADAP binding to SLP-76 differentially regulates peripheral SMAC (pSMAC) formation at the immunological synapse versus T cell-APC conjugation; ADAP-SLP-76 interaction requires specific YDDV sites of ADAP, and loss of this interaction acts as a dominant negative on pSMAC formation and IL-2 production. |
Mutagenesis of ADAP, immunological synapse imaging, IL-2 production assay, LFA-1 clustering assay |
The Journal of experimental medicine |
Medium |
15477347
|
| 2005 |
TCR-activated reactive oxygen species (ROS) induce transient oxidative inactivation of SHP-2 (but not SHP-1); SHP-2 is recruited to the LAT-Gads-SLP-76 complex and directly regulates phosphorylation of Vav1 and ADAP, with the ADAP-SLP-76 association regulated by SHP-2 in a redox-dependent manner. |
ROS detection, phosphatase activity assay, co-immunoprecipitation, T cell adhesion assay |
The EMBO journal |
Medium |
15933714
|
| 2005 |
SLP-76 forms signaling microclusters at TCR contact sites with APCs containing ZAP-70; microclusters are continuously generated at the periphery, migrate toward the central SMAC, and tyrosine phosphorylation and calcium influx occur as microclusters form. Inhibition of signaling prevents ZAP-70 recruitment into microclusters. |
Live-cell imaging (TIRF microscopy), fluorescently-tagged SLP-76 and ZAP-70, signaling inhibitors |
Nature immunology |
High |
16273097
|
| 2005 |
CD6 cytoplasmic tail phospho-Y662 directly binds the SH2 domain of SLP-76 (Kd = 0.5 µM at 37°C); this interaction is required for CD6-mediated T cell costimulation. |
Phosphopeptide binding (equilibrium dissociation constant measured), co-immunoprecipitation, mutagenesis, costimulation assay |
Molecular and cellular biology |
High |
16914752
|
| 2006 |
SLP-76 forms dynamic membrane clusters upon FcεRI cross-linking in mast cells, colocalizing with FcεRI, Syk, LAT, and phosphotyrosine; disruption of the SLP-76-Gads interaction (by SLP-76 mutation) prevents translocation and clustering, inhibiting calcium flux, degranulation, and cytokine secretion. |
Confocal real-time imaging, mutagenesis of SLP-76 Gads-binding region, calcium flux, degranulation assay |
Molecular and cellular biology |
High |
16479002
|
| 2006 |
SLP-76 Tyr145 is the most critical N-terminal tyrosine for T cell development and function; Y145 is required for optimal association of SLP-76 with ITK, while Y112/Y128 associate with Vav and Nck and are required for TCR-induced Ca2+ flux and actin reorganization. |
Individual tyrosine mutagenesis in reconstituted SLP-76-deficient cells and primary T cells, calcium flux, actin assay, co-immunoprecipitation |
Journal of immunology |
High |
16456002
|
| 2006 |
The Gads-binding domain of SLP-76 is required for PLC-γ1 recruitment to GEMs, while the N-terminal tyrosine phosphorylation sites and P-1 region are required for PLC-γ1 phosphorylation at Y783; ITK (associated with SLP-76 via N-terminal tyrosines) efficiently phosphorylates PLC-γ1 at Y783 in vitro. |
Lipid raft fractionation, PLC-γ1 phosphorylation assay, in vitro kinase assay with ITK, mutagenesis |
The Journal of biological chemistry |
High |
17148460
|
| 2007 |
HPK1 phosphorylates SLP-76 at serine 376; this serine phosphorylation mediates recruitment of 14-3-3ε and ζ proteins to SLP-76, which attenuates TCR-induced tyrosine phosphorylation of SLP-76 and PLC-γ1 and reduces IL-2 transcription. S376A mutation or HPK-1 knockdown enhances TCR signaling. |
RNAi knockdown, in vitro phosphorylation, mutagenesis (S376A), co-immunoprecipitation, IL-2 reporter assay, phosphorylation assay |
The Journal of experimental medicine |
High |
17353368
|
| 2007 |
SLP-76 is required for TCR-induced activation of ITK; ITK bound to SLP-76 represents most of the catalytically active ITK, and ITK activity is lost upon mild elution from the SLP-76 complex but restored upon reconstitution. SLP-76 N-terminal tyrosines are required for ITK activation but not ZAP-70 activation. |
In vitro kinase assay (ITK vs ZAP-70 on PLC-γ1), co-immunoprecipitation, mutagenesis, reconstitution experiments |
Proceedings of the National Academy of Sciences |
High |
17420479
|
| 2007 |
The Gads C-SH3 domain binds the SLP-76 RxxK motif with very high affinity (Kd = 8-20 nM); T cell signaling efficiency declines with decreasing Gads-SLP-76 binding affinity, demonstrating a quantitative affinity requirement for efficient TCR signaling. |
Quantitative affinity measurement, SLP-76 mutants with graded affinities, TCR signaling reporter assays in Jurkat cells |
The EMBO journal |
High |
17235283
|
| 2008 |
SLP-76 N-terminal tyrosines Y145 and Y112-128 are required for thymocyte selection but can complement one another in trans (on separate SLP-76 molecules); Y145 differentially supports Itk-dependent pathways while Y112-128 supports Vav1 phosphorylation, demonstrating cooperativity between SLP-76 molecules. |
Knock-in mice (Y145F and Y112-128F), compound heterozygote analysis, phosphorylation assays, co-immunoprecipitation |
Immunity |
High |
18342008
|
| 2008 |
VLA-4 integrin costimulation retards actin-driven inward flows and prevents centralization of SLP-76 microclusters, prolonging lateral SLP-76/ZAP-70 interactions and retaining SLP-76 in tyrosine-phosphorylated peripheral structures, thereby sustaining T cell signaling. |
Live TIRF microscopy of SLP-76 microclusters, integrin ligand modulation, actin flow measurement |
Immunity |
High |
18549800
|
| 2009 |
SLP-76 mediates 'outside-in' integrin signaling in T cells; SLP-76 relocalizes to integrin-initiated microclusters by a mechanism requiring ADAP binding (not LAT/Gads), distinct from TCR-initiated microcluster assembly, and is required for T cell adhesion to integrin ligands. |
SLP-76 KO T cells, domain mutagenesis (ADAP-binding vs Gads-binding mutants), microcluster imaging, adhesion assay |
Molecular and cellular biology |
High |
19667077
|
| 2010 |
The SLP-76/Nck/VAV1 complex has defined stoichiometry (one SLP-76, two Nck, two VAV1); a direct Nck-VAV1 interaction via the C-terminal SH3 domain of Nck and the VAV1 N-terminal SH3 domain is required for actin polymerization after T cell activation. |
Analytical ultracentrifugation, co-immunoprecipitation, mutagenesis of Nck-VAV1 interface, actin polymerization assay |
The EMBO journal |
High |
20562827
|
| 2010 |
Platelet CLEC-2 receptors bind lymphatic endothelial PDPN and activate SLP-76 signaling; platelet-specific deletion of SLP-76 (via PF4-Cre) is sufficient to cause lymphatic vascular defects, and SLP-76-dependent platelet aggregate formation occurs on lymphatic endothelial cell surfaces. |
Conditional KO (PF4-Cre x Slp76 flox), in vivo and ex vivo vascular imaging, platelet-LEC co-culture |
Blood |
High |
20363774
|
| 2012 |
HPK1-dependent serine 376 phosphorylation of SLP-76 mediates ubiquitination of SLP-76 at lysine 30, targeting phosphorylated SLP-76 for proteasomal degradation during TCR signaling; K30R mutation enhances anti-CD3-induced ERK and JNK activation. |
In vitro ubiquitination assay, mutagenesis (S376A, K30R), proteasome inhibition, ERK/JNK activation assay |
The Journal of biological chemistry |
High |
22902619
|
| 2012 |
In NK cells, SLP-76 Y113 and Y128 are phosphorylated by distinct co-activation receptor pairs (e.g., NKG2D and 2B4), enabling SLP-76 binding to Vav1; combined phosphorylation of both tyrosines is required for synergistic Ca2+ mobilization and NK cell activation. |
SLP-76 KD and reconstitution with tyrosine mutants, Ca2+ flux assay, cytotoxicity assay, co-immunoprecipitation |
Science signaling |
High |
22786724
|
| 2012 |
SLP-76 and ADAP are required for E-selectin-mediated integrin activation and slow leukocyte rolling in neutrophils; two N-terminal tyrosines and the SH2 domain of SLP-76 are required for downstream signaling, placing BTK and then PI3Kγ/PLCγ2 downstream of SLP-76 in this pathway. |
Genetically engineered KO mice, transduced primary leukocytes, intravital microscopy, kinase assays |
The Journal of experimental medicine |
High |
22291096
|
| 2012 |
SLP-76, Nck, and Vav1 form a trimolecular complex in live T cells; Nck-Vav1 dimers are constitutively formed independently of T cell activation and SLP-76-Nck association; after TCR stimulation, SLP-76 phosphorylation enables Nck binding and complex assembly. The Nck-Vav1 interaction requires Vav1 proline-rich/SH3 domain and is critical for actin rearrangement. |
Triple-color FRET (3FRET) in live T cells, mutagenesis of Vav1 SH3, actin rearrangement assay |
Science signaling |
High |
22534133
|
| 2013 |
ADAP contains three binding sites for the SLP-76 SH2 domain; multipoint binding of SLP-76 to ADAP oligomerizes SLP-76 SH2 domain in vitro and is critical for SLP-76 microcluster assembly in stimulated T cells; any combination of two sites partially restores microclusters. |
Analytical ultracentrifugation, biophysical binding assays, confocal imaging of microclusters, ADAP mutagenesis, functional T cell assays |
Molecular and cellular biology |
High |
23979596
|
| 2021 |
SLP-76 directly binds the cytosolic tail of RAGE via its SAM (sterile α motif) domain; this interaction mediates downstream p38 MAPK, ERK1/2, and IKKα/β phosphorylation as well as cytokine release in macrophages. TAT-SAM peptide delivery blocks RAGE-SLP-76 interaction and attenuates sepsis in mice. |
Co-immunoprecipitation in vitro and in vivo, genetic deficiency of RAGE/SLP-76, TAT-peptide cell delivery, CLP sepsis model |
Nature communications |
High |
33436632
|