{"gene":"PLCG1","run_date":"2026-06-10T06:43:35","timeline":{"discoveries":[{"year":1998,"finding":"LAT (pp36) is required for TCR-mediated activation of PLCγ1: T cells deficient in LAT fail to show increases in intracellular calcium, Ras activation, and IL-2 gene expression, and reexpression of LAT restores PLCγ1 signaling, placing LAT upstream of PLCγ1 in the TCR pathway.","method":"Functional reconstitution in LAT-deficient Jurkat (J.CaM2) mutant cell line with LAT re-expression; epistasis analysis","journal":"Immunity","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic complementation with defined cellular phenotype readout, replicated across multiple signaling endpoints","pmids":["9846483"],"is_preprint":false},{"year":2001,"finding":"SLP-76 directly interacts with the SH3 domain of PLCγ1 via a 67-amino-acid proline-rich 'P-1 domain'; this constitutive interaction is required for TCR-mediated activation of Erk, PLCγ1, and NFAT. The SH2(N) domain of PLCγ1 is required for association with LAT and for PLCγ1 tyrosine phosphorylation, whereas the SH2(C) domain mediates a non-Ca²⁺ signaling function linked to IL-2 promoter activation.","method":"Structure-function deletion mutagenesis of SLP-76 and PLCγ1; co-immunoprecipitation; reconstitution in Jurkat cells; NFAT and IL-2 reporter assays","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal co-IP plus systematic mutagenesis plus functional reporter assays defining domain-specific roles","pmids":["11390650"],"is_preprint":false},{"year":2000,"finding":"PLCγ1 is required for TCR-dependent Ca²⁺ mobilization and NFAT activation; the SH2(C) domain is necessary for RE/AP and IL-2 promoter activation after TCR+CD28 costimulation; the major phosphorylation site Tyr783 is required for these transcriptional responses. The SH2(N) domain is required for LAT association and PLCγ1 tyrosine phosphorylation but not for IL-2 promoter activation.","method":"Isolation and characterization of PLC-γ1-deficient Jurkat sublines (J.γ1 and P98); reconstitution with wild-type and domain-mutant PLCγ1 constructs; Ca²⁺ flux, NFAT, and IL-2 reporter assays","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic complementation with multiple PLCγ1 mutants, multiple orthogonal functional readouts","pmids":["11094067"],"is_preprint":false},{"year":2001,"finding":"Plcg1 nullizygous mouse embryos lack erythroid progenitors (BFU, CFU, Ter119+) and show severely diminished vasculogenesis (reduced PECAM-1 and Flk-1 expression), demonstrating that PLCγ1 is required for erythropoiesis and vasculogenesis in vivo; PLCγ2 cannot substitute.","method":"Plcg1 knockout mouse analysis; colony-forming unit assays; immunostaining for Ter119, PECAM-1, Flk-1","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo knockout with multiple orthogonal assays (BFU, CFU, immunostaining) confirming the phenotype","pmids":["11744703"],"is_preprint":false},{"year":2006,"finding":"The N-terminal SH2 domain of PLCγ1 is necessary but not sufficient for recruitment to the LAT signaling complex; either the SH3 or C-terminal SH2 domain, together with Vav1, c-Cbl, and SLP-76, are required to stabilize PLCγ1 recruitment. All three SH domains are required for phosphorylation of PLCγ1 Y783, which is critical for enzyme activation.","method":"Biochemical co-immunoprecipitation combined with real-time fluorescent imaging; domain-deletion mutant analysis in T cells","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal biochemical pulldown plus live imaging, multiple domain mutants, single lab","pmids":["16467851"],"is_preprint":false},{"year":2005,"finding":"PLCγ1 is required for cardiac contractility in the embryonic zebrafish heart; the dead beat mutation maps to plcg1. VEGF signals through FLT-1 receptor to activate PLCγ1, increasing Ca²⁺ transients and exerting a positive inotropic effect in cardiomyocytes; this pathway functions in rat ventricular cardiomyocytes as well.","method":"Forward genetic cloning of zebrafish dead beat mutant; cardiac-specific PLCγ1 rescue; VEGF pathway epistasis; Ca²⁺ transient measurements in rat cardiomyocytes","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic cloning, tissue-specific rescue, cross-species (zebrafish + rat) functional validation","pmids":["15998812"],"is_preprint":false},{"year":2009,"finding":"Vegf/Plcg1 signaling acts at multiple time points downstream of receptor tyrosine kinases to mediate distinct aspects of artery development in zebrafish; in vivo structure-function analysis demonstrates a requirement for Plcg1 catalytic activity; mosaic analysis establishes that plcg1 functions cell-autonomously in endothelial cells.","method":"Forward genetic screen in zebrafish; allelic series of plcg1 mutations; in vivo structure-function analysis; mosaic analysis","journal":"Developmental biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic allelic series with catalytic domain mutants and cell-autonomous mosaic rescue","pmids":["19269286"],"is_preprint":false},{"year":2003,"finding":"Functional PLCγ1 is required for c-Abl activation by PDGFR: PLC-γ1-mediated hydrolysis of PtdIns(4,5)P2 (decreasing its levels) increases Abl kinase activity; c-Abl functions downstream of PLCγ1 in chemotaxis; PLCγ1 and c-Abl form a complex in cells enhanced by PDGF stimulation; activated c-Abl phosphorylates PLCγ1 and negatively modulates its function, constituting a feedback loop.","method":"Co-immunoprecipitation; kinase assays; inositol phosphatase (Inp54) overexpression to deplete PtdIns(4,5)P2; kinase-inactive c-Abl dominant negative rescue; chemotaxis assay","journal":"Nature cell biology","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — in vitro kinase assay plus co-IP plus lipid manipulation plus functional rescue, single lab with multiple orthogonal methods","pmids":["12652307"],"is_preprint":false},{"year":2005,"finding":"PLCγ1 is essential for integrin-mediated cell motility: depletion by siRNA, pharmacological inhibition, or genetic knockout prevents cell protrusions, spreading, and elongation after integrin engagement; Tyr783 phosphorylation (by Src kinase acting downstream of β1 integrin) and SH2 domains are required; PLCγ1 co-immunoprecipitates with Src after fibronectin-induced integrin activation in a FAK-independent manner.","method":"siRNA knockdown; PLCγ1−/− cells; site-directed mutagenesis at Y783; Src kinase inhibitor; co-immunoprecipitation; morphology/invasion assays","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO plus siRNA plus mutagenesis plus biochemical co-IP, multiple orthogonal approaches","pmids":["15944397"],"is_preprint":false},{"year":2005,"finding":"Fibronectin selectively increases PLCγ1 phosphorylation at Tyr783 (but not Tyr771 or Tyr1253) via Src kinase (not EGFR kinase) downstream of β1 integrin; mutagenesis of Tyr783 abrogates fibronectin-dependent cell adhesion; PLCγ1 co-immunoprecipitates with Src after fibronectin stimulation, and this is FAK-independent.","method":"Plcg1−/− vs. re-expressed fibroblasts; site-directed mutagenesis; Src-family kinase KO cells; FAK KO cells; co-immunoprecipitation; adhesion assays","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic null cells plus mutagenesis plus multiple KO cell lines plus co-IP","pmids":["15657076"],"is_preprint":false},{"year":2007,"finding":"c-Cbl E3 ubiquitin ligase constitutively associates with PLCγ1 via its C-terminal domain and conditionally interacts with VEGFR-2; full c-Cbl activation requires direct association with VEGFR-2 phosphotyrosines Y1052/Y1057 and indirect association with pY1173 via PLCγ1. The VEGFR-2/PLCγ1/c-Cbl ternary complex promotes ubiquitylation of PLCγ1 and suppresses its tyrosine phosphorylation by a proteolysis-independent mechanism, negatively regulating angiogenesis.","method":"In vitro and in vivo binding assays; site-directed mutagenesis of VEGFR-2; siRNA silencing of c-Cbl; ubiquitylation assays; angiogenesis assays","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — binding assays plus mutagenesis plus siRNA knockdown plus ubiquitylation assay, multiple orthogonal methods","pmids":["17372230"],"is_preprint":false},{"year":2011,"finding":"c-Cbl-dependent ubiquitination of PLCγ1 selectively inhibits its tyrosine phosphorylation (without inducing degradation), suppressing VEGF-driven Ca²⁺ release, endothelial proliferation, and angiogenesis in vivo; genetic inactivation of c-Cbl in mice results in enhanced tumor angiogenesis and retinal neovascularization.","method":"c-Cbl knockout mice; endothelial cell proliferation and tube formation assays; Ca²⁺ release measurement; ubiquitination assay","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo knockout with multiple functional readouts and biochemical mechanism","pmids":["21242968"],"is_preprint":false},{"year":1998,"finding":"FcεRI cross-linking activates PLCγ1 in mast cells; PLCγ1 is cytosolic at rest and translocates to plasma membrane ruffles upon antigen stimulation; this translocation and activation (but not that of PLCγ2) is blocked by the PI3-kinase inhibitor wortmannin, implicating PI3-kinase in PLCγ1 phosphorylation, translocation, and activation.","method":"Immune complex phospholipase assays; subcellular fractionation; immunofluorescence; wortmannin inhibition","journal":"Molecular biology of the cell","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct activation assay plus localization plus pharmacological epistasis, single lab","pmids":["9450969"],"is_preprint":false},{"year":2001,"finding":"EGF induces rapid translocation of PLCγ1-GFP from cytoplasm to plasma membrane (actin-dependent, PI3K-independent), and at later times to endosomes co-localizing with internalized EGFR; EGF-induced PLCγ1 concentrates in caveolae, and disruption of caveolae ablates EGF-induced Ca²⁺ mobilization.","method":"Live-cell GFP imaging; subcellular fractionation; methyl-β-cyclodextrin caveolae disruption; Ca²⁺ mobilization assay","journal":"Experimental cell research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — live imaging plus fractionation plus functional Ca²⁺ readout, single lab","pmids":["11412035"],"is_preprint":false},{"year":2004,"finding":"PKCθ promotes a positive feedback loop in T cell restimulation by enhancing TCR/CD28-induced PLCγ1 tyrosine phosphorylation and activation; this requires the Tec kinase Tec (not Itk or Rlk) acting downstream of PKCθ through a pleckstrin-homology domain-dependent association of Tec with PKCθ, linking the PKCθ pathway to Ca²⁺ signaling and AP-1 activation.","method":"PKCθ−/− primary T cells; dominant-negative PLCγ1 and Tec mutants; AP-1/NFAT reporter assays; Ca²⁺ mobilization; co-immunoprecipitation","journal":"European journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO plus dominant-negative analysis plus co-IP, single lab","pmids":["15214048"],"is_preprint":false},{"year":2009,"finding":"PLCγ1 SH3 domain directly interacts with Rac1 via the Rac1 (106)PNTP(109) motif; this interaction is required for EGF-induced Rac1 activation in vivo; purified PLCγ1 SH3 domain acts as a Rac1 guanine nucleotide exchange factor in vitro, mediating EGF-induced F-actin formation and cell migration.","method":"Co-immunoprecipitation; direct binding; in vitro GEF assay with purified proteins; mutagenesis; siRNA knockdown; F-actin and migration assays","journal":"Molecular endocrinology","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — in vitro GEF reconstitution plus mutagenesis plus co-IP, single lab","pmids":["19264842"],"is_preprint":false},{"year":2009,"finding":"PLCγ1 directly cross-links LAT through its two SH2 domains, promoting phase separation of LAT into liquid-like condensates; PLCγ1 protects LAT from dephosphorylation by the phosphatase CD45 and promotes LAT-dependent ERK activation and SLP76 phosphorylation; PLCγ1 concentration has a nonmonotonic effect on LAT cluster size.","method":"Reconstitution of phase separation in vitro; mutagenesis; biochemical dephosphorylation protection assays; ERK and SLP76 phosphorylation assays; computer simulations","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reconstitution with mutagenesis and functional biochemical validation, single lab with multiple orthogonal methods","pmids":["33929486"],"is_preprint":false},{"year":2009,"finding":"Itk phosphorylates PLCγ1 at Y783 through a direct, phosphotyrosine-independent interaction between the SH2 domain of PLCγ1 and the kinase domain of Itk; NMR spectroscopy and mutagenesis define this nonclassical SH2 binding surface; disruption of this docking interaction attenuates T cell signaling.","method":"NMR spectroscopy; mutagenesis; in vitro binding and phosphorylation assays; T cell signaling readouts","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1 / Moderate — NMR structure plus mutagenesis plus functional T cell validation, single lab","pmids":["19955438"],"is_preprint":false},{"year":2012,"finding":"F-actin polymerization drives actin retrograde flow at the immunological synapse; disruption of retrograde flow arrests microcluster centralization and inhibits PLCγ1 phosphorylation within microclusters (leaving Zap70 activity intact), thereby suppressing sustained Ca²⁺ signaling at the ER store level.","method":"Pharmacological inhibitors of F-actin dynamics; live-cell imaging of microcluster movement; PLCγ1 phosphorylation by immunofluorescence; Ca²⁺ signaling measurements","journal":"The Journal of cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological dissection with multiple readouts, functional imaging, single lab","pmids":["22665519"],"is_preprint":false},{"year":2012,"finding":"PLCγ1 activation is critical for myogenic constriction of cerebral arteries: pressure (via Src tyrosine kinase) activates PLCγ1, which generates IP3; IP3 sensitizes IP3 receptors to Ca²⁺ influx through mechanosensitive TRPC6, synergistically increasing IP3R-mediated Ca²⁺ release to activate TRPM4 currents and smooth muscle depolarization; proximity ligation assays demonstrate colocalization of PLCγ1, TRPC6, and TRPM4.","method":"Pharmacological inhibitors; Ca²⁺ imaging in isolated cerebral arteries; proximity ligation assay; Src inhibitor; IP3 measurement","journal":"Science signaling","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional assays in isolated arteries plus proximity ligation, single lab","pmids":["24866019"],"is_preprint":false},{"year":2014,"finding":"The recurrent PLCG1 R707Q mutation in angiosarcomas affects the autoinhibitory SH2 domain and causes constitutive activation: ectopic expression in endothelial cells shows reduced PLCγ1-Y783 phosphorylation yet increased IP3, Ca²⁺-dependent calcineurin activation, c-RAF/MEK/ERK1/2 phosphorylation, and cofilin activation compared with wild-type; R707Q increases apoptosis resistance and cell migration/invasion without affecting proliferation.","method":"Targeted next-generation sequencing; ectopic expression of wild-type vs. R707Q in endothelial cells; IP3 measurement; Ca²⁺ signaling; phospho-western blotting; migration and invasion assays","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional reconstitution with defined mutation plus multiple biochemical readouts, single lab","pmids":["25252913"],"is_preprint":false},{"year":2014,"finding":"PLCG1 S345F (and other gain-of-function mutations) in cutaneous T-cell lymphoma increase downstream signaling toward NFAT activation; immunohistochemistry showed strong NFAT nuclear staining in PLCG1-mutated CTCL cases; functional studies demonstrated that PLCG1 mutants elicit increased NFAT activation, and inhibition reduced CTCL cell proliferation and viability.","method":"Targeted sequencing; NFAT immunohistochemistry; functional overexpression of PLCG1 mutants; NFAT reporter assays; inhibitor treatment with proliferation/viability readout","journal":"Blood","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional overexpression mutant studies with reporter and cell biology readouts, single lab","pmids":["24497536"],"is_preprint":false},{"year":2019,"finding":"Nine PLCG1 mutations identified in Sézary syndrome confer gain-of-function PLCγ1 activity through increased inositol phosphate production and downstream NFκB, AP-1, and NFAT transcriptional activation; these activating mutations do not require Y783 phosphorylation for downstream signaling, in contrast to wild-type PLCγ1.","method":"In vitro inositol phosphate assays; NFκB/AP-1/NFAT luciferase reporter assays; Y783 phosphorylation-deficient mutant analysis; expression in cell lines","journal":"The Journal of investigative dermatology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — direct enzymatic assay plus multiple reporter assays plus mutagenesis, nine distinct mutations tested, single lab","pmids":["31376383"],"is_preprint":false},{"year":2009,"finding":"VEGFR2 Y1175 signaling through PLCγ1 is required for endothelial specification of VEGFR2+ vascular progenitors from embryonic stem cells; VEGFR3 does not activate PLCγ1 and does not direct endothelial differentiation, distinguishing the VEGFR2-PLCγ1 axis as unique for endothelial specification.","method":"Chimeric VEGFR2/VEGFR3 receptors in ES cell differentiation system; PLCγ1 activation assays; endothelial differentiation markers","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — receptor chimera in vitro differentiation system with functional readout, single lab","pmids":["19706681"],"is_preprint":false},{"year":2012,"finding":"PDK1 regulates PLCγ1 activation through direct association of the two enzymes and modulation of PLCγ1 tyrosine phosphorylation; this PDK1-PLCγ1 pathway is important for cancer cell invasion.","method":"Co-immunoprecipitation; PLCγ1 tyrosine phosphorylation assays; cancer cell invasion assays; PDK1 inhibition/knockdown","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus functional invasion assay plus phosphorylation analysis, single lab","pmids":["22454520"],"is_preprint":false},{"year":2014,"finding":"In unstimulated cells, the SH3 domain of PLCγ1 (not its SH2 domains) competes with the C-terminal SH3 domain of Grb2 for a phosphorylation-independent binding site at the very C-terminus of FGFR2; reduction of Grb2 allows PLCγ1 to bind FGFR2 basally, upregulating phospholipase activity and increasing PtdIns(4,5)P2 turnover, Ca²⁺, and cell invasion.","method":"Structural and binding analysis; competition assays; PtdIns(4,5)P2 turnover; Ca²⁺ measurements; invasion assays in cells with reduced Grb2","journal":"Nature structural & molecular biology","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — structural binding analysis plus functional lipid and Ca²⁺ assays plus cell invasion, single lab with multiple orthogonal approaches","pmids":["24440983"],"is_preprint":false},{"year":2003,"finding":"Tr-kit promotes formation of a multimolecular complex containing Fyn, PLCγ1, and Sam68; tr-kit promotes association of Sam68 with PLCγ1 and Fyn via the PLCγ1 SH3 domain; this leads to PLCγ1 phosphorylation by Fyn and alters Sam68 subcellular localization and its release from bound RNA.","method":"Co-immunoprecipitation with antibodies to each complex partner; SH3 domain binding; in-cell expression studies; RNA binding assays","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP of three partners plus functional subcellular localization readout, single lab","pmids":["14647465"],"is_preprint":false},{"year":2011,"finding":"LKB1 is directly phosphorylated by Lck at tyrosines 36, 261, and 365; LKB1 interacts predominantly with LAT and PLCγ1 following TCR stimulation; loss of LKB1 impairs recruitment of PLCγ1 to the LAT signalosome and reduces PLCγ1 tyrosine phosphorylation, causing defective thymocyte positive selection.","method":"Lck-Cre/CD4-Cre conditional LKB1 knockout mice; co-immunoprecipitation; tyrosine phosphorylation analysis; T cell signaling and thymocyte development assays","journal":"The EMBO journal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with co-IP and phosphorylation analysis, single lab","pmids":["21487392"],"is_preprint":false},{"year":2015,"finding":"Scaffold protein SLP-76 pY173IDR motif binds to the C-terminal SH2 domain (SH2C) of PLCγ1 with significant affinity despite not conforming to the canonical pY-SH2 recognition motif; this interaction competes with the autoinhibited conformation of the SH2C domain, exposing the ITK recognition element and releasing Y783 for ITK-mediated phosphorylation and PLCγ1 activation.","method":"NMR spectroscopy; mutagenesis; in vitro binding assays; competition assays with phosphopeptides","journal":"Journal of molecular biology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — NMR structural analysis plus quantitative binding assays plus mutagenesis, mechanistic detail at molecular resolution","pmids":["25916191"],"is_preprint":false},{"year":2012,"finding":"RIAM (Rap1-GTP-interacting adaptor molecule) regulates TCR-mediated signaling by controlling translocation of phosphorylated PLCγ1 to the actin cytoskeleton, which is required to bring PLCγ1 close to its substrate PtdIns(4,5)P2; loss of RIAM impairs IP3 generation, Ca²⁺ mobilization, NFAT nuclear translocation, and IL-2 expression.","method":"shRNA knockdown of RIAM; IP3 assay; Ca²⁺ mobilization; NFAT localization; co-localization of pPLCγ1 with actin; reconstitution with RIAM","journal":"Science signaling","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — shRNA knockdown with reconstitution and multiple signaling readouts, single lab","pmids":["19952372"],"is_preprint":false},{"year":2018,"finding":"PLCγ1 mediates axonal guidance downstream of the netrin-1/DCC complex through Src kinase activation; netrin-1/DCC activates PLCγ1 to induce actin cytoskeleton rearrangement; neuronal progenitor-specific knockout of Plcg1 in mice causes axon guidance defects in the mesencephalon and adult structural alterations in the corpus callosum, substantia innominata, and olfactory tubercle.","method":"Conditional neuronal progenitor-specific Plcg1 knockout mice; PLCγ1 activation assays; actin rearrangement assays; brain structural analysis in adults","journal":"EMBO reports","confidence":"High","confidence_rationale":"Tier 2 / Strong — tissue-specific knockout with in vivo axon guidance and brain structure phenotypes plus molecular pathway epistasis","pmids":["30224412"],"is_preprint":false},{"year":2018,"finding":"CD95 (soluble CD95L/s-CD95L) recruits PLCγ1 to the calcium-inducing domain (CID) within CD95, triggering Ca²⁺ signaling and Th17 inflammatory cell accumulation; the HIV protease inhibitor ritonavir disrupts the CD95-PLCγ1 interaction; CID peptidomimetics designed to block this interaction abrogate CD95-driven Ca²⁺ response and Th17 transmigration, and reduce lupus symptoms in mice.","method":"Large-scale inhibitor screen; structure-activity relationship; co-immunoprecipitation; Ca²⁺ flux assay; Th17 transmigration assay; in vivo lupus mouse model","journal":"Nature chemical biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — biochemical binding assay plus Ca²⁺ functional assay plus in vivo rescue, multiple orthogonal approaches","pmids":["30429604"],"is_preprint":false},{"year":2012,"finding":"PLCγ1 signaling (specifically hypoxia-induced ROS-dependent PLCγ1 activation via mitochondrial complex III) generates IP3, triggers IP3R-mediated Ca²⁺ release, and mediates hypoxic vasoconstriction in pulmonary arterial smooth muscle cells; this pathway is specific to pulmonary (not mesenteric) arteries.","method":"shRNA knockdown of PLCγ1 and RISP; PLC inhibitor; IP3R antagonists; Ca²⁺ imaging; IP3 measurement; isolated pulmonary artery contraction","journal":"American journal of physiology. Lung cellular and molecular physiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — shRNA knockdown plus pharmacological inhibitors with multiple functional readouts, single lab","pmids":["23204067"],"is_preprint":false},{"year":2014,"finding":"PLCγ1 is activated downstream of EpoR-Jak2 (independently of Stat5) and is required for erythropoiesis: PLCγ1-deficient erythroid progenitors show impaired differentiation and colony-forming potential in vitro and in vivo; the top downstream effector identified is the histone variant macroH2A2 (encoded by H2afy2), whose inactivation recapitulates PLCγ1 depletion effects on erythroid maturation.","method":"Plcγ1 loss-of-function in HSCs; colony assays; flow cytometry; in vivo reconstitution; transcriptomic and DNA methylation analyses; macroH2A2 knockdown","journal":"Cell death and differentiation","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic loss-of-function with in vivo phenotype plus downstream effector identification, single lab","pmids":["25394487"],"is_preprint":false},{"year":2015,"finding":"CD47 agonist peptides induce Ca²⁺-mediated, caspase-independent programmed cell death in CLL B cells through sustained phosphorylation of PLCγ1 at Y783; downregulation of PLCγ1 or pharmacological inhibition of PLCγ1 phosphorylation abolishes CD47-mediated killing.","method":"siRNA knockdown and pharmacological inhibition of PLCγ1; Ca²⁺ flux assays; cell death assays; xenograft mouse model","journal":"PLoS medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic and pharmacological inhibition with functional cell death readout in patient cells and mouse model, single lab","pmids":["25734483"],"is_preprint":false},{"year":2023,"finding":"A de novo germline PLCG1 S1021F variant is a gain-of-function mutation causing immune dysregulation: it leads to increased IP3 production, intracellular Ca²⁺ release, and enhanced phosphorylation of ERK, p65, and p38; it activates NF-κB and type II IFN pathways in T cells and NF-κB and type I IFN pathways in monocytes; PLCγ1 inhibitor or JAK inhibitor reverses the upregulated gene expression.","method":"Whole exome sequencing; IP-One ELISA for IP3; Ca²⁺ flux assay; immunoblotting; luciferase reporter; single-cell RNA-seq; pharmacological inhibitor reversal in patient cells and cell lines","journal":"The Journal of allergy and clinical immunology","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — direct enzymatic IP3 assay plus Ca²⁺ flux plus functional rescue with inhibitors in patient cells and cell lines, multiple orthogonal methods, single lab","pmids":["37422272"],"is_preprint":false},{"year":2022,"finding":"PLCG1 is required for AML1-ETO leukemic stem cell self-renewal; AE fusion protein induces PLCG1 expression by binding intergenic regulatory DNA elements; genetic inactivation of PLCG1 in murine and human AML inhibits AE-dependent self-renewal, proliferation, and leukemia maintenance in vivo; PLCG1 is dispensable for normal hematopoietic stem and progenitor cell function.","method":"Genetic inactivation of PLCG1; in vivo leukemia maintenance assays; normal HSC function assays; ChIP-seq identification of AE binding at PLCG1 regulatory elements; pharmacological Ca²⁺ signaling perturbation","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo genetic KO in multiple models (murine and human) plus ChIP-seq regulatory mechanism, replicated across systems","pmids":["34695195"],"is_preprint":false},{"year":2020,"finding":"PLCγ1 suppression in KRAS-mutant lung adenocarcinoma cells during hypoxia promotes glycolytic metabolism by impairing Ca²⁺ entry into mitochondria, reducing mitochondrial ROS, preventing lipid peroxidation, and antagonizing apoptosis; loss of function of Plcg1 in KrasG12D-driven mouse lung adenocarcinoma increases glycolytic gene expression and boosts tumor growth.","method":"Lipidomic screen; PLCγ1 loss-of-function in cell lines; KrasG12D mouse model; mitochondrial Ca²⁺ and ROS measurements; metabolic assays","journal":"Nature cell biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo mouse genetic model plus mechanistic biochemical analysis with multiple readouts, multiple cell lines validated","pmids":["33077911"],"is_preprint":false},{"year":2024,"finding":"PLCG1 is a substrate for chaperone-mediated autophagy (CMA): aberrant accumulation of PLCG1 caused by CMA blockage (LAMP2A reduction) results in calcium overload and induces nucleus pulposus cell senescence; knockdown of Plcg1 inhibits TNF-induced disc degeneration in rats.","method":"Structural and functional proteomic screens; immunoprecipitation; calcium flux assays; LAMP2A overexpression and Plcg1 knockdown in rat disc degeneration model; immunoassays on human specimens","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — proteomic substrate identification plus in vivo rat model plus Ca²⁺ functional assay, single lab","pmids":["39212196"],"is_preprint":false},{"year":2020,"finding":"NDRG1 forms a complex with PLCγ1 through NDRG1 phosphorylation sites and is required for VEGF-A-induced PLCγ1 and ERK1/2 activation in endothelial cells; Ndrg1−/− mice exhibit impaired VEGF-A-induced angiogenesis without affecting VEGFR2 expression or function, placing NDRG1 upstream of PLCγ1 in the VEGF-A angiogenic pathway.","method":"Co-immunoprecipitation; Ndrg1 knockout mice; corneal angiogenesis assay; PLCγ1 and ERK1/2 phosphorylation assays; aortic sprouting assay","journal":"Communications biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo KO with co-IP and multiple functional readouts, single lab","pmids":["32144393"],"is_preprint":false},{"year":2012,"finding":"Kaposi's sarcoma herpesvirus K15 protein directly recruits PLCγ1, activating calcineurin/NFAT1-dependent RCAN1 expression and promoting angiogenic tube formation; deletion or siRNA silencing of K15 abrogates these effects.","method":"Co-immunoprecipitation; NFAT luciferase reporter; siRNA knockdown; angiogenic tube formation assay; KSHV K15 deletion mutant","journal":"PLoS pathogens","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus reporter plus functional angiogenesis assay with genetic deletion, single lab","pmids":["23028325"],"is_preprint":false},{"year":2011,"finding":"Phospho-STAT3 (Y705) directly associates with PLCγ1 in colorectal cancer cells; PLCγ1 activity is reduced in STAT3 Y705F mutant cells; overexpression of constitutively active PLCγ1 rescues the transformation defect of STAT3 Y705F mutant cells, establishing a functional STAT3-PLCγ1 cross-talk in colorectal tumorigenesis.","method":"STAT3 Y705F knock-in; co-immunoprecipitation; constitutively active PLCγ1 rescue; colony and xenograft assays","journal":"Molecular cancer research : MCR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic knock-in plus co-IP plus functional rescue, single lab","pmids":["21840932"],"is_preprint":false},{"year":2009,"finding":"Molecular genetic analysis of FGFR1 signaling demonstrates that PLCγ1 activation downstream of FGFR1 is integral to maintenance of adult neural stem cell characteristics (capacity for neuronal and oligodendroglial differentiation), whereas the MAPK/Erk1/2 pathway is required and sufficient for NSC expansion and anti-differentiation.","method":"Molecular genetic approach using FGFR1 cytoplasmic residue mutants that selectively disrupt MAPK or PLC activation; adult rat NSC culture; proliferation and differentiation assays","journal":"Molecular brain","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — selective receptor mutagenesis with defined cellular phenotype readouts, single lab","pmids":["19505325"],"is_preprint":false},{"year":2013,"finding":"PLC-γ1 activation is required for postbinding cell entry of influenza H1N1 (but not H3N2); H1N1 infection induces phosphorylation of PLCγ1 at Ser1248 immediately after infection downstream of EGFR; both pharmacological inhibition and shRNA knockdown of PLCγ1 suppress H1N1 replication.","method":"PLC-γ1-specific inhibitor; shRNA knockdown; PLCγ1 Ser1248 phosphorylation assay; viral replication assays; EGFR epistasis","journal":"Journal of virology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological plus genetic inhibition with viral entry assay and phosphorylation analysis, single lab","pmids":["24155396"],"is_preprint":false},{"year":2002,"finding":"PLC-γ1 enzyme activity is required for insulin-induced DNA synthesis in hIRcB fibroblasts; the insulin receptor physically associates with PLCγ1; disruption of this interaction by microinjection of SH2 domains blocks mitogenesis; the requirement for PLC-γ1 is specifically for its lipase activity producing DAG (rescued by synthetic DAG but not IP3).","method":"PLC activity inhibitor; microinjection of SH2 domain peptides and neutralizing antibodies; DNA synthesis assay; DAG/IP3 rescue experiments","journal":"Endocrinology","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — direct lipase activity requirement demonstrated by rescue experiments plus microinjection, single lab","pmids":["11796522"],"is_preprint":false},{"year":2002,"finding":"PLCγ1 is required for IGF-I-dependent cell survival in suspension (anoikis protection); IGF-I rescues Null+ but not Null (Plcg1−/−) cells from suspension-induced apoptosis; IGF-I stimulates PLCγ1 tyrosine phosphorylation in both adherent and suspension cells.","method":"Plcg1−/− and re-expressed (Null+) fibroblasts; suspension-induced cell death assay; caspase-3 activity; PLCγ1 tyrosine phosphorylation assay","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic null cells with functional survival rescue assay, single lab","pmids":["11973363"],"is_preprint":false},{"year":2015,"finding":"PLCγ2 cSH2 domain binds K15 (KSHV) and acts as a dominant-negative inhibitor of the K15P-PLCγ1 interaction; K15P-dependent PLCγ1 phosphorylation, NFAT-dependent promoter activation, and invasiveness/angiogenesis of KSHV-infected cells are abrogated by this domain; two amino acid substitutions enhance its inhibitory potency.","method":"Domain mapping of PLCγ1/PLCγ2 interactions with K15; co-immunoprecipitation; dominant-negative expression; NFAT reporter; invasion and angiogenesis assays","journal":"PLoS pathogens","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — domain mapping plus functional dominant-negative assay plus co-IP, single lab","pmids":["26295810"],"is_preprint":false},{"year":1997,"finding":"Villin (ileal microvillar actin-binding protein) is tyrosine-phosphorylated and associates with PLCγ1 in brush border membrane; carbachol increases this association and tyrosine phosphorylation of villin; F-actin stabilization prevents carbachol-induced NaCl absorption inhibition, linking PLCγ1/villin-mediated cytoskeletal rearrangement to NaCl absorption regulation.","method":"Co-immunoprecipitation of villin and PLCγ1; Triton fractionation; tyrosine phosphorylation assays; jasplakinolide F-actin stabilization; NaCl absorption assay","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus pharmacological perturbation plus functional transport assay, single lab","pmids":["9374490"],"is_preprint":false},{"year":2020,"finding":"EphA2 receptor tyrosine kinase interacts with PLCγ1 (identified by yeast two-hybrid screen); EphA2 kinase activity is required for PLCγ1 phosphorylation; genetic or pharmacologic inhibition of EphA2 decreases PLCγ1 phosphorylation; CRISPR knockout of PLCγ1 impairs tumor growth in vitro and in a KrasG12D-p53-Lkb1 mouse lung tumor model.","method":"Yeast two-hybrid screen; co-immunoprecipitation; kinase inhibition; CRISPR PLCγ1 knockout; in vivo mouse lung tumor model","journal":"Molecular cancer research : MCR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO in vivo plus co-IP plus kinase assay, single lab","pmids":["32753469"],"is_preprint":false},{"year":2018,"finding":"PLCγ1 (phosphorylated at Y783) is activated by hypoxia through ROS-dependent signaling, generating IP3 that promotes PKCε activation, IP3R1 opening, Ca²⁺ release, and contraction in pulmonary artery smooth muscle cells; chronic hypoxia enhances PLCγ1 expression and activity in PASMCs, contributing to pulmonary hypertension.","method":"H2O2-induced PLCγ1 Y783 phosphorylation assay; PKCε knockout PASMCs; IP3R1 knockdown; IP3 production assay; Ca²⁺ imaging; pulmonary artery contraction assay","journal":"American journal of physiology. Lung cellular and molecular physiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO (PKCε) plus molecular knockdown plus functional assays, single lab","pmids":["29388468"],"is_preprint":false},{"year":2014,"finding":"TCR-mediated PLCγ1 activation is induced at LAT (simultaneous onset of LAT Y132 and PLCγ1 Y783 phosphorylation); PLCγ1 activation occurs more rapidly than LAT Y132 phosphorylation; the LAT-PLCγ1 association is more transient than LAT-Grb2; a pool of activated PLCγ1 translocates away from LAT to TCR-containing cellular structures.","method":"Phosphorylation kinetics analysis; co-immunoprecipitation; imaging of activated PLCγ1 localization at LAT vs. TCR complexes","journal":"Cellular signalling","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — kinetic analysis plus co-IP plus imaging, single lab","pmids":["24412752"],"is_preprint":false},{"year":2018,"finding":"Cish SH2 domain binding to PLCγ1 is essential for PLCγ1 ubiquitination and degradation; Cish SH2 domain is required for Cish-mediated inhibition of Ca²⁺ release upon TCR stimulation; Cish is expressed mostly in the cytoplasm and does not cluster at the plasma membrane upon stimulation.","method":"Cish SH2 domain mutants (R107K) and D/BC domain mutants; PLCγ1 ubiquitination assay; Ca²⁺ flux assay; cytokine measurements; imaging of Cish localization","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — mutagenesis plus ubiquitination assay plus functional Ca²⁺ readout, single lab","pmids":["29593227"],"is_preprint":false}],"current_model":"PLCγ1 is a receptor tyrosine kinase- and integrin-regulated phospholipase that hydrolyzes PtdIns(4,5)P2 to generate IP3 and DAG; in T cells it is recruited to LAT via its SH2(N) domain, cross-links LAT into phase-separated signaling condensates, is primed by SLP-76 pY173 binding to its SH2(C) domain, and activated by Itk-mediated phosphorylation of Y783 to drive Ca²⁺/NFAT and PKC/AP-1 responses; in endothelial cells it transduces VEGFR2 (via pY1175) and is negatively regulated by c-Cbl ubiquitination; gain-of-function mutations in its autoinhibitory SH2 domain or catalytic region cause Y783-phosphorylation-independent constitutive activity driving lymphoma, angiosarcoma, and germline immune dysregulation; PLCγ1 is also essential for erythropoiesis, vasculogenesis, cardiac contractility, axon guidance, and pulmonary vasoconstriction, and serves as a substrate for CMA degradation linking Ca²⁺ homeostasis to cellular senescence."},"narrative":{"mechanistic_narrative":"PLCγ1 is a receptor- and integrin-coupled phospholipase that hydrolyzes PtdIns(4,5)P2 to generate the second messengers IP3 and DAG, transducing tyrosine-kinase signals into Ca²⁺ mobilization and downstream transcriptional programs across immune, vascular, neuronal, and developmental contexts [PMID:11094067, PMID:15944397, PMID:11796522]. In T cells, PLCγ1 is recruited through its N-terminal SH2 domain to the phosphorylated adaptor LAT, an interaction that is necessary but insufficient for stable engagement and requires additional contributions from its SH3 and C-terminal SH2 domains together with SLP-76, Vav1, and c-Cbl [PMID:9846483, PMID:11390650, PMID:16467851]; PLCγ1 itself cross-links LAT into phase-separated condensates and protects LAT from CD45-mediated dephosphorylation, reinforcing the signalosome [PMID:33929486]. Activation proceeds by a stepwise mechanism in which SLP-76 pY173 binds the autoinhibited SH2(C) domain, displacing it to expose the docking surface for Itk, which then phosphorylates the critical activating residue Y783 via a noncanonical SH2–kinase interaction [PMID:19955438, PMID:25916191]; productive enzyme activity drives Ca²⁺/NFAT and AP-1/NF-κB responses [PMID:11094067, PMID:31376383]. Beyond lymphocytes, PLCγ1 transduces VEGFR2 signaling through pY1175 for endothelial specification and is negatively regulated by c-Cbl-dependent ubiquitination that suppresses its tyrosine phosphorylation without degradation [PMID:17372230, PMID:21242968, PMID:19706681]; it acts cell-autonomously in endothelium for vasculogenesis and artery development and is required for erythropoiesis, cardiac contractility, and netrin-1/DCC-dependent axon guidance in vivo [PMID:11744703, PMID:15998812, PMID:19269286, PMID:30224412, PMID:25394487]. Gain-of-function mutations in the autoinhibitory SH2 domain or catalytic region (e.g., R707Q, S345F, S1021F) confer constitutive, Y783-phosphorylation-independent enzyme activity that elevates IP3 and drives NFAT/NF-κB/AP-1 signaling, underlying angiosarcoma, cutaneous T-cell lymphoma, Sézary syndrome, and germline immune dysregulation [PMID:25252913, PMID:24497536, PMID:31376383, PMID:37422272].","teleology":[{"year":1998,"claim":"Established the adaptor LAT as the upstream organizer required for TCR-driven PLCγ1 activation, defining where in the pathway PLCγ1 acts.","evidence":"Genetic complementation in LAT-deficient Jurkat cells with multiple signaling readouts","pmids":["9846483"],"confidence":"High","gaps":["Did not define which PLCγ1 domains contact LAT","Mechanism of PLCγ1 catalytic activation not addressed"]},{"year":2001,"claim":"Assigned distinct functions to individual PLCγ1 domains, showing SH2(N) mediates LAT association and phosphorylation while SH3 binds SLP-76 and SH2(C) carries a separable signaling role.","evidence":"Domain-deletion mutagenesis, reciprocal co-IP, and reporter assays in Jurkat cells; PLCγ1-deficient Jurkat reconstitution","pmids":["11390650","11094067"],"confidence":"High","gaps":["Structural basis of the noncanonical SH2(C) function unresolved","How Y783 phosphorylation links to enzyme activation not defined"]},{"year":2001,"claim":"Demonstrated PLCγ1 is essential and nonredundant in vivo for erythropoiesis and vasculogenesis, extending its role beyond immune signaling.","evidence":"Plcg1 knockout mouse embryo analysis with colony-forming and immunostaining assays","pmids":["11744703"],"confidence":"High","gaps":["Upstream receptors driving these developmental roles not identified here","Downstream effectors unknown"]},{"year":2003,"claim":"Showed PLCγ1 participates in feedback signaling loops with kinases (c-Abl) and that its lipid-hydrolysis product depletion modulates partner kinase activity.","evidence":"Co-IP, kinase assays, PtdIns(4,5)P2 depletion, and chemotaxis assays","pmids":["12652307"],"confidence":"High","gaps":["Physiological context of the c-Abl feedback loop limited","Reciprocal regulation in vivo untested"]},{"year":2005,"claim":"Defined PLCγ1 as a transducer of integrin and VEGF/FLT-1 signaling, linking Src-dependent Y783 phosphorylation to cell motility and cardiac contractility.","evidence":"Genetic KO/siRNA, Y783 mutagenesis, Src-family KO cells, zebrafish dead beat mutant cloning and rescue, and rat cardiomyocyte Ca²⁺ measurements","pmids":["15944397","15657076","15998812"],"confidence":"High","gaps":["How integrin- versus RTK-driven activation differ mechanistically not fully resolved","Site specificity of phosphorylation under integrin engagement only partly mapped"]},{"year":2007,"claim":"Identified c-Cbl as a negative regulator that ubiquitinates PLCγ1 within a VEGFR-2 ternary complex to suppress its phosphorylation without degradation, controlling angiogenesis.","evidence":"Binding assays, VEGFR-2 mutagenesis, c-Cbl siRNA, ubiquitylation and angiogenesis assays; later confirmed in c-Cbl knockout mice","pmids":["17372230","21242968"],"confidence":"High","gaps":["Structural basis of proteolysis-independent inhibition by ubiquitin unclear","Whether this regulation operates outside endothelium untested"]},{"year":2009,"claim":"Resolved the molecular activation switch in T cells: Itk docks via a noncanonical PLCγ1 SH2 surface to phosphorylate Y783, while PLCγ1 actively drives LAT phase separation and protects LAT phosphorylation.","evidence":"NMR spectroscopy, mutagenesis, in vitro phase-separation reconstitution, and dephosphorylation-protection assays","pmids":["19955438","33929486"],"confidence":"High","gaps":["How condensate formation and Itk docking are temporally coordinated not fully defined","In vivo relevance of phase separation untested"]},{"year":2009,"claim":"Showed PLCγ1 acts cell-autonomously in endothelium downstream of VEGFR2 (via pY1175) for artery development and endothelial specification, requiring catalytic activity.","evidence":"Zebrafish allelic series with catalytic mutants and mosaic analysis; chimeric VEGFR2/VEGFR3 ES cell differentiation","pmids":["19269286","19706681"],"confidence":"High","gaps":["Receptor-specific basis for VEGFR2 versus VEGFR3 selectivity at the PLCγ1 level only partly explained","Effector pathways downstream of catalytic activity in arteries not enumerated"]},{"year":2015,"claim":"Defined the priming step of activation: SLP-76 pY173 binds the autoinhibited SH2(C) domain, displacing it to expose the Itk recognition element and release Y783 for phosphorylation.","evidence":"NMR spectroscopy, quantitative binding, and competition assays with phosphopeptides","pmids":["25916191"],"confidence":"High","gaps":["Full conformational cycle of the lipase in cells not visualized","Quantitative ordering relative to LAT recruitment unresolved"]},{"year":2018,"claim":"Extended PLCγ1 function to neuronal axon guidance in vivo and to CD95-driven Ca²⁺ signaling in inflammation, establishing therapeutically targetable interactions.","evidence":"Neuronal progenitor-specific Plcg1 knockout with brain structural phenotypes; CD95 CID inhibitor screen, co-IP, Ca²⁺ flux, and lupus mouse model","pmids":["30224412","30429604"],"confidence":"High","gaps":["Downstream cytoskeletal effectors of netrin-1/DCC-PLCγ1 only partly defined","Generalizability of CID-targeting beyond modeled disease untested"]},{"year":2014,"claim":"Established that recurrent autoinhibitory-domain and catalytic mutations confer constitutive, Y783-independent PLCγ1 activity driving lymphoma and angiosarcoma.","evidence":"Targeted sequencing plus reconstitution of R707Q and S345F mutants with IP3, Ca²⁺, NFAT reporter, and invasion readouts","pmids":["25252913","24497536"],"confidence":"Medium","gaps":["Structural mechanism by which SH2-domain mutations relieve autoinhibition only inferred","In vivo tumorigenicity of single mutants in autochthonous models not shown"]},{"year":2019,"claim":"Generalized the gain-of-function model by showing diverse Sézary-syndrome mutations raise inositol phosphate output and NF-κB/AP-1/NFAT activation independent of Y783 phosphorylation.","evidence":"In vitro inositol phosphate assays, multiple reporter assays, and Y783-deficient mutant analysis across nine mutations","pmids":["31376383"],"confidence":"High","gaps":["Per-mutation structural consequences not individually resolved","Therapeutic vulnerability of mutant-driven signaling not tested here"]},{"year":2023,"claim":"Demonstrated that a de novo germline gain-of-function variant causes a Mendelian immune-dysregulation disorder via elevated IP3/Ca²⁺ and inflammatory transcription, reversible by PLCγ1 or JAK inhibition.","evidence":"Whole exome sequencing, IP3 ELISA, Ca²⁺ flux, scRNA-seq, and inhibitor reversal in patient cells","pmids":["37422272"],"confidence":"High","gaps":["Genotype-phenotype spectrum of germline PLCG1 variants incomplete","Long-term consequences in human carriers beyond initial characterization unknown"]},{"year":2024,"claim":"Identified PLCγ1 as a chaperone-mediated autophagy substrate, linking its turnover to Ca²⁺ homeostasis and cellular senescence.","evidence":"Proteomic substrate identification, immunoprecipitation, Ca²⁺ assays, and LAMP2A/Plcg1 manipulation in a rat disc-degeneration model","pmids":["39212196"],"confidence":"Medium","gaps":["CMA targeting motif on PLCγ1 not mapped","Single-lab finding awaiting independent confirmation"]},{"year":null,"claim":"How distinct upstream contexts (RTK, integrin, immune receptor, mechanosensation) select among PLCγ1's varied effector outputs and how oncogenic versus germline activating mutations differentially rewire signaling remain incompletely defined.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified structural model linking each activation route to a specific output","Context-dependent partner usage not systematically compared"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0016787","term_label":"hydrolase activity","supporting_discovery_ids":[20,22,25,44]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[16,17,28]},{"term_id":"GO:0008289","term_label":"lipid binding","supporting_discovery_ids":[7,25,44]},{"term_id":"GO:0060089","term_label":"molecular transducer activity","supporting_discovery_ids":[0,2,8]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[1,4,16]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[12,13]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[12,13,16]},{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[29,47]}],"pathway":[{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[0,1,2,16,17]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[8,10,23,25]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[3,5,6,30]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[20,21,22,35,36]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[34,45]}],"complexes":["LAT signalosome","VEGFR2/PLCγ1/c-Cbl ternary complex"],"partners":["LAT","SLP-76","ITK","CBL","SRC","VEGFR2","RAC1","FGFR2"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P19174","full_name":"1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-1","aliases":["PLC-148","Phosphoinositide phospholipase C-gamma-1","Phospholipase C-II","PLC-II","Phospholipase C-gamma-1","PLC-gamma-1"],"length_aa":1290,"mass_kda":148.5,"function":"Mediates the production of the second messenger molecules diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3). Plays an important role in the regulation of intracellular signaling cascades. Becomes activated in response to ligand-mediated activation of receptor-type tyrosine kinases, such as PDGFRA, PDGFRB, EGFR, FGFR1, FGFR2, FGFR3 and FGFR4 (By similarity). Plays a role in actin reorganization and cell migration (PubMed:17229814). Guanine nucleotide exchange factor that binds the GTPase DNM1 and catalyzes the dissociation of GDP, allowing a GTP molecule to bind in its place, therefore enhancing DNM1-dependent endocytosis (By similarity)","subcellular_location":"Cell projection, lamellipodium; Cell projection, ruffle","url":"https://www.uniprot.org/uniprotkb/P19174/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/PLCG1","classification":"Not Classified","n_dependent_lines":18,"n_total_lines":1208,"dependency_fraction":0.014900662251655629},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/PLCG1","total_profiled":1310},"omim":[{"mim_id":"620514","title":"IMMUNE DYSREGULATION, AUTOIMMUNITY, AND AUTOINFLAMMATION; IDAA","url":"https://www.omim.org/entry/620514"},{"mim_id":"618749","title":"LEUCINE-RICH REPEAT-CONTAINING PROTEIN 17; LRRC17","url":"https://www.omim.org/entry/618749"},{"mim_id":"617837","title":"GDNF FAMILY RECEPTOR ALPHA-LIKE PROTEIN; GFRAL","url":"https://www.omim.org/entry/617837"},{"mim_id":"617514","title":"IMMUNODEFICIENCY 52; IMD52","url":"https://www.omim.org/entry/617514"},{"mim_id":"614406","title":"SLP ADAPTOR- AND CSK-INTERACTING MEMBRANE PROTEIN; SCIMP","url":"https://www.omim.org/entry/614406"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Plasma membrane","reliability":"Supported"},{"location":"Basal body","reliability":"Additional"},{"location":"Cytosol","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/PLCG1"},"hgnc":{"alias_symbol":["PLC148","PLC-II","PLCgamma1","NCKAP3"],"prev_symbol":["PLC1"]},"alphafold":{"accession":"P19174","domains":[{"cath_id":"2.30.29.30","chopping":"21-147","consensus_level":"high","plddt":91.3833,"start":21,"end":147},{"cath_id":"-","chopping":"166-222","consensus_level":"medium","plddt":82.0056,"start":166,"end":222},{"cath_id":"3.20.20.190","chopping":"320-467_950-1071","consensus_level":"high","plddt":95.0667,"start":320,"end":1071},{"cath_id":"2.30.29.30","chopping":"487-524_856-936","consensus_level":"medium","plddt":84.0468,"start":487,"end":936},{"cath_id":"3.30.505.10","chopping":"560-652","consensus_level":"medium","plddt":89.1756,"start":560,"end":652},{"cath_id":"3.30.505.10","chopping":"670-757","consensus_level":"medium","plddt":88.9897,"start":670,"end":757},{"cath_id":"2.30.30.40","chopping":"797-850","consensus_level":"medium","plddt":85.8219,"start":797,"end":850},{"cath_id":"2.60.40.150","chopping":"1086-1214","consensus_level":"high","plddt":94.9071,"start":1086,"end":1214},{"cath_id":"1.10.238","chopping":"226-304","consensus_level":"medium","plddt":83.9391,"start":226,"end":304}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P19174","model_url":"https://alphafold.ebi.ac.uk/files/AF-P19174-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P19174-F1-predicted_aligned_error_v6.png","plddt_mean":82.75},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=PLCG1","jax_strain_url":"https://www.jax.org/strain/search?query=PLCG1"},"sequence":{"accession":"P19174","fasta_url":"https://rest.uniprot.org/uniprotkb/P19174.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P19174/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P19174"}},"corpus_meta":[{"pmid":"9846483","id":"PMC_9846483","title":"LAT is required for TCR-mediated activation of PLCgamma1 and the Ras pathway.","date":"1998","source":"Immunity","url":"https://pubmed.ncbi.nlm.nih.gov/9846483","citation_count":407,"is_preprint":false},{"pmid":"24633157","id":"PMC_24633157","title":"Recurrent PTPRB and PLCG1 mutations in angiosarcoma.","date":"2014","source":"Nature genetics","url":"https://pubmed.ncbi.nlm.nih.gov/24633157","citation_count":258,"is_preprint":false},{"pmid":"24497536","id":"PMC_24497536","title":"PLCG1 mutations in cutaneous T-cell lymphomas.","date":"2014","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/24497536","citation_count":177,"is_preprint":false},{"pmid":"20514023","id":"PMC_20514023","title":"miR-200bc/429 cluster targets PLCgamma1 and differentially regulates proliferation and EGF-driven invasion than miR-200a/141 in breast cancer.","date":"2010","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/20514023","citation_count":175,"is_preprint":false},{"pmid":"22665519","id":"PMC_22665519","title":"F-actin polymerization and retrograde flow drive sustained PLCγ1 signaling during T cell activation.","date":"2012","source":"The Journal of cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/22665519","citation_count":168,"is_preprint":false},{"pmid":"26735859","id":"PMC_26735859","title":"Recurrent CIC Gene Abnormalities in Angiosarcomas: A Molecular Study of 120 Cases With Concurrent Investigation of PLCG1, KDR, MYC, and FLT4 Gene Alterations.","date":"2016","source":"The American journal of surgical pathology","url":"https://pubmed.ncbi.nlm.nih.gov/26735859","citation_count":165,"is_preprint":false},{"pmid":"11390650","id":"PMC_11390650","title":"Identification of a phospholipase C-gamma1 (PLC-gamma1) SH3 domain-binding site in SLP-76 required for T-cell receptor-mediated activation of PLC-gamma1 and 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cells.","date":"2020","source":"Archives of pharmacal research","url":"https://pubmed.ncbi.nlm.nih.gov/32016828","citation_count":14,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":52621,"output_tokens":13705,"usd":0.181719,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":26040,"output_tokens":5048,"usd":0.1282,"stage2_stop_reason":"end_turn"},"total_usd":0.309919,"stage1_batch_id":"msgbatch_01CNoDbkChHEkgrJnL7BwtGJ","stage2_batch_id":"msgbatch_016Y4x9E9Wg5VQDANj9quSQD","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1998,\n      \"finding\": \"LAT (pp36) is required for TCR-mediated activation of PLCγ1: T cells deficient in LAT fail to show increases in intracellular calcium, Ras activation, and IL-2 gene expression, and reexpression of LAT restores PLCγ1 signaling, placing LAT upstream of PLCγ1 in the TCR pathway.\",\n      \"method\": \"Functional reconstitution in LAT-deficient Jurkat (J.CaM2) mutant cell line with LAT re-expression; epistasis analysis\",\n      \"journal\": \"Immunity\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic complementation with defined cellular phenotype readout, replicated across multiple signaling endpoints\",\n      \"pmids\": [\"9846483\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"SLP-76 directly interacts with the SH3 domain of PLCγ1 via a 67-amino-acid proline-rich 'P-1 domain'; this constitutive interaction is required for TCR-mediated activation of Erk, PLCγ1, and NFAT. The SH2(N) domain of PLCγ1 is required for association with LAT and for PLCγ1 tyrosine phosphorylation, whereas the SH2(C) domain mediates a non-Ca²⁺ signaling function linked to IL-2 promoter activation.\",\n      \"method\": \"Structure-function deletion mutagenesis of SLP-76 and PLCγ1; co-immunoprecipitation; reconstitution in Jurkat cells; NFAT and IL-2 reporter assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal co-IP plus systematic mutagenesis plus functional reporter assays defining domain-specific roles\",\n      \"pmids\": [\"11390650\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"PLCγ1 is required for TCR-dependent Ca²⁺ mobilization and NFAT activation; the SH2(C) domain is necessary for RE/AP and IL-2 promoter activation after TCR+CD28 costimulation; the major phosphorylation site Tyr783 is required for these transcriptional responses. The SH2(N) domain is required for LAT association and PLCγ1 tyrosine phosphorylation but not for IL-2 promoter activation.\",\n      \"method\": \"Isolation and characterization of PLC-γ1-deficient Jurkat sublines (J.γ1 and P98); reconstitution with wild-type and domain-mutant PLCγ1 constructs; Ca²⁺ flux, NFAT, and IL-2 reporter assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic complementation with multiple PLCγ1 mutants, multiple orthogonal functional readouts\",\n      \"pmids\": [\"11094067\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Plcg1 nullizygous mouse embryos lack erythroid progenitors (BFU, CFU, Ter119+) and show severely diminished vasculogenesis (reduced PECAM-1 and Flk-1 expression), demonstrating that PLCγ1 is required for erythropoiesis and vasculogenesis in vivo; PLCγ2 cannot substitute.\",\n      \"method\": \"Plcg1 knockout mouse analysis; colony-forming unit assays; immunostaining for Ter119, PECAM-1, Flk-1\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo knockout with multiple orthogonal assays (BFU, CFU, immunostaining) confirming the phenotype\",\n      \"pmids\": [\"11744703\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"The N-terminal SH2 domain of PLCγ1 is necessary but not sufficient for recruitment to the LAT signaling complex; either the SH3 or C-terminal SH2 domain, together with Vav1, c-Cbl, and SLP-76, are required to stabilize PLCγ1 recruitment. All three SH domains are required for phosphorylation of PLCγ1 Y783, which is critical for enzyme activation.\",\n      \"method\": \"Biochemical co-immunoprecipitation combined with real-time fluorescent imaging; domain-deletion mutant analysis in T cells\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal biochemical pulldown plus live imaging, multiple domain mutants, single lab\",\n      \"pmids\": [\"16467851\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"PLCγ1 is required for cardiac contractility in the embryonic zebrafish heart; the dead beat mutation maps to plcg1. VEGF signals through FLT-1 receptor to activate PLCγ1, increasing Ca²⁺ transients and exerting a positive inotropic effect in cardiomyocytes; this pathway functions in rat ventricular cardiomyocytes as well.\",\n      \"method\": \"Forward genetic cloning of zebrafish dead beat mutant; cardiac-specific PLCγ1 rescue; VEGF pathway epistasis; Ca²⁺ transient measurements in rat cardiomyocytes\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic cloning, tissue-specific rescue, cross-species (zebrafish + rat) functional validation\",\n      \"pmids\": [\"15998812\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Vegf/Plcg1 signaling acts at multiple time points downstream of receptor tyrosine kinases to mediate distinct aspects of artery development in zebrafish; in vivo structure-function analysis demonstrates a requirement for Plcg1 catalytic activity; mosaic analysis establishes that plcg1 functions cell-autonomously in endothelial cells.\",\n      \"method\": \"Forward genetic screen in zebrafish; allelic series of plcg1 mutations; in vivo structure-function analysis; mosaic analysis\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic allelic series with catalytic domain mutants and cell-autonomous mosaic rescue\",\n      \"pmids\": [\"19269286\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Functional PLCγ1 is required for c-Abl activation by PDGFR: PLC-γ1-mediated hydrolysis of PtdIns(4,5)P2 (decreasing its levels) increases Abl kinase activity; c-Abl functions downstream of PLCγ1 in chemotaxis; PLCγ1 and c-Abl form a complex in cells enhanced by PDGF stimulation; activated c-Abl phosphorylates PLCγ1 and negatively modulates its function, constituting a feedback loop.\",\n      \"method\": \"Co-immunoprecipitation; kinase assays; inositol phosphatase (Inp54) overexpression to deplete PtdIns(4,5)P2; kinase-inactive c-Abl dominant negative rescue; chemotaxis assay\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — in vitro kinase assay plus co-IP plus lipid manipulation plus functional rescue, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"12652307\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"PLCγ1 is essential for integrin-mediated cell motility: depletion by siRNA, pharmacological inhibition, or genetic knockout prevents cell protrusions, spreading, and elongation after integrin engagement; Tyr783 phosphorylation (by Src kinase acting downstream of β1 integrin) and SH2 domains are required; PLCγ1 co-immunoprecipitates with Src after fibronectin-induced integrin activation in a FAK-independent manner.\",\n      \"method\": \"siRNA knockdown; PLCγ1−/− cells; site-directed mutagenesis at Y783; Src kinase inhibitor; co-immunoprecipitation; morphology/invasion assays\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO plus siRNA plus mutagenesis plus biochemical co-IP, multiple orthogonal approaches\",\n      \"pmids\": [\"15944397\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Fibronectin selectively increases PLCγ1 phosphorylation at Tyr783 (but not Tyr771 or Tyr1253) via Src kinase (not EGFR kinase) downstream of β1 integrin; mutagenesis of Tyr783 abrogates fibronectin-dependent cell adhesion; PLCγ1 co-immunoprecipitates with Src after fibronectin stimulation, and this is FAK-independent.\",\n      \"method\": \"Plcg1−/− vs. re-expressed fibroblasts; site-directed mutagenesis; Src-family kinase KO cells; FAK KO cells; co-immunoprecipitation; adhesion assays\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic null cells plus mutagenesis plus multiple KO cell lines plus co-IP\",\n      \"pmids\": [\"15657076\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"c-Cbl E3 ubiquitin ligase constitutively associates with PLCγ1 via its C-terminal domain and conditionally interacts with VEGFR-2; full c-Cbl activation requires direct association with VEGFR-2 phosphotyrosines Y1052/Y1057 and indirect association with pY1173 via PLCγ1. The VEGFR-2/PLCγ1/c-Cbl ternary complex promotes ubiquitylation of PLCγ1 and suppresses its tyrosine phosphorylation by a proteolysis-independent mechanism, negatively regulating angiogenesis.\",\n      \"method\": \"In vitro and in vivo binding assays; site-directed mutagenesis of VEGFR-2; siRNA silencing of c-Cbl; ubiquitylation assays; angiogenesis assays\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — binding assays plus mutagenesis plus siRNA knockdown plus ubiquitylation assay, multiple orthogonal methods\",\n      \"pmids\": [\"17372230\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"c-Cbl-dependent ubiquitination of PLCγ1 selectively inhibits its tyrosine phosphorylation (without inducing degradation), suppressing VEGF-driven Ca²⁺ release, endothelial proliferation, and angiogenesis in vivo; genetic inactivation of c-Cbl in mice results in enhanced tumor angiogenesis and retinal neovascularization.\",\n      \"method\": \"c-Cbl knockout mice; endothelial cell proliferation and tube formation assays; Ca²⁺ release measurement; ubiquitination assay\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo knockout with multiple functional readouts and biochemical mechanism\",\n      \"pmids\": [\"21242968\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"FcεRI cross-linking activates PLCγ1 in mast cells; PLCγ1 is cytosolic at rest and translocates to plasma membrane ruffles upon antigen stimulation; this translocation and activation (but not that of PLCγ2) is blocked by the PI3-kinase inhibitor wortmannin, implicating PI3-kinase in PLCγ1 phosphorylation, translocation, and activation.\",\n      \"method\": \"Immune complex phospholipase assays; subcellular fractionation; immunofluorescence; wortmannin inhibition\",\n      \"journal\": \"Molecular biology of the cell\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct activation assay plus localization plus pharmacological epistasis, single lab\",\n      \"pmids\": [\"9450969\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"EGF induces rapid translocation of PLCγ1-GFP from cytoplasm to plasma membrane (actin-dependent, PI3K-independent), and at later times to endosomes co-localizing with internalized EGFR; EGF-induced PLCγ1 concentrates in caveolae, and disruption of caveolae ablates EGF-induced Ca²⁺ mobilization.\",\n      \"method\": \"Live-cell GFP imaging; subcellular fractionation; methyl-β-cyclodextrin caveolae disruption; Ca²⁺ mobilization assay\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — live imaging plus fractionation plus functional Ca²⁺ readout, single lab\",\n      \"pmids\": [\"11412035\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"PKCθ promotes a positive feedback loop in T cell restimulation by enhancing TCR/CD28-induced PLCγ1 tyrosine phosphorylation and activation; this requires the Tec kinase Tec (not Itk or Rlk) acting downstream of PKCθ through a pleckstrin-homology domain-dependent association of Tec with PKCθ, linking the PKCθ pathway to Ca²⁺ signaling and AP-1 activation.\",\n      \"method\": \"PKCθ−/− primary T cells; dominant-negative PLCγ1 and Tec mutants; AP-1/NFAT reporter assays; Ca²⁺ mobilization; co-immunoprecipitation\",\n      \"journal\": \"European journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO plus dominant-negative analysis plus co-IP, single lab\",\n      \"pmids\": [\"15214048\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"PLCγ1 SH3 domain directly interacts with Rac1 via the Rac1 (106)PNTP(109) motif; this interaction is required for EGF-induced Rac1 activation in vivo; purified PLCγ1 SH3 domain acts as a Rac1 guanine nucleotide exchange factor in vitro, mediating EGF-induced F-actin formation and cell migration.\",\n      \"method\": \"Co-immunoprecipitation; direct binding; in vitro GEF assay with purified proteins; mutagenesis; siRNA knockdown; F-actin and migration assays\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro GEF reconstitution plus mutagenesis plus co-IP, single lab\",\n      \"pmids\": [\"19264842\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"PLCγ1 directly cross-links LAT through its two SH2 domains, promoting phase separation of LAT into liquid-like condensates; PLCγ1 protects LAT from dephosphorylation by the phosphatase CD45 and promotes LAT-dependent ERK activation and SLP76 phosphorylation; PLCγ1 concentration has a nonmonotonic effect on LAT cluster size.\",\n      \"method\": \"Reconstitution of phase separation in vitro; mutagenesis; biochemical dephosphorylation protection assays; ERK and SLP76 phosphorylation assays; computer simulations\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reconstitution with mutagenesis and functional biochemical validation, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"33929486\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Itk phosphorylates PLCγ1 at Y783 through a direct, phosphotyrosine-independent interaction between the SH2 domain of PLCγ1 and the kinase domain of Itk; NMR spectroscopy and mutagenesis define this nonclassical SH2 binding surface; disruption of this docking interaction attenuates T cell signaling.\",\n      \"method\": \"NMR spectroscopy; mutagenesis; in vitro binding and phosphorylation assays; T cell signaling readouts\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR structure plus mutagenesis plus functional T cell validation, single lab\",\n      \"pmids\": [\"19955438\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"F-actin polymerization drives actin retrograde flow at the immunological synapse; disruption of retrograde flow arrests microcluster centralization and inhibits PLCγ1 phosphorylation within microclusters (leaving Zap70 activity intact), thereby suppressing sustained Ca²⁺ signaling at the ER store level.\",\n      \"method\": \"Pharmacological inhibitors of F-actin dynamics; live-cell imaging of microcluster movement; PLCγ1 phosphorylation by immunofluorescence; Ca²⁺ signaling measurements\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological dissection with multiple readouts, functional imaging, single lab\",\n      \"pmids\": [\"22665519\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"PLCγ1 activation is critical for myogenic constriction of cerebral arteries: pressure (via Src tyrosine kinase) activates PLCγ1, which generates IP3; IP3 sensitizes IP3 receptors to Ca²⁺ influx through mechanosensitive TRPC6, synergistically increasing IP3R-mediated Ca²⁺ release to activate TRPM4 currents and smooth muscle depolarization; proximity ligation assays demonstrate colocalization of PLCγ1, TRPC6, and TRPM4.\",\n      \"method\": \"Pharmacological inhibitors; Ca²⁺ imaging in isolated cerebral arteries; proximity ligation assay; Src inhibitor; IP3 measurement\",\n      \"journal\": \"Science signaling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional assays in isolated arteries plus proximity ligation, single lab\",\n      \"pmids\": [\"24866019\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"The recurrent PLCG1 R707Q mutation in angiosarcomas affects the autoinhibitory SH2 domain and causes constitutive activation: ectopic expression in endothelial cells shows reduced PLCγ1-Y783 phosphorylation yet increased IP3, Ca²⁺-dependent calcineurin activation, c-RAF/MEK/ERK1/2 phosphorylation, and cofilin activation compared with wild-type; R707Q increases apoptosis resistance and cell migration/invasion without affecting proliferation.\",\n      \"method\": \"Targeted next-generation sequencing; ectopic expression of wild-type vs. R707Q in endothelial cells; IP3 measurement; Ca²⁺ signaling; phospho-western blotting; migration and invasion assays\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional reconstitution with defined mutation plus multiple biochemical readouts, single lab\",\n      \"pmids\": [\"25252913\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"PLCG1 S345F (and other gain-of-function mutations) in cutaneous T-cell lymphoma increase downstream signaling toward NFAT activation; immunohistochemistry showed strong NFAT nuclear staining in PLCG1-mutated CTCL cases; functional studies demonstrated that PLCG1 mutants elicit increased NFAT activation, and inhibition reduced CTCL cell proliferation and viability.\",\n      \"method\": \"Targeted sequencing; NFAT immunohistochemistry; functional overexpression of PLCG1 mutants; NFAT reporter assays; inhibitor treatment with proliferation/viability readout\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional overexpression mutant studies with reporter and cell biology readouts, single lab\",\n      \"pmids\": [\"24497536\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Nine PLCG1 mutations identified in Sézary syndrome confer gain-of-function PLCγ1 activity through increased inositol phosphate production and downstream NFκB, AP-1, and NFAT transcriptional activation; these activating mutations do not require Y783 phosphorylation for downstream signaling, in contrast to wild-type PLCγ1.\",\n      \"method\": \"In vitro inositol phosphate assays; NFκB/AP-1/NFAT luciferase reporter assays; Y783 phosphorylation-deficient mutant analysis; expression in cell lines\",\n      \"journal\": \"The Journal of investigative dermatology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — direct enzymatic assay plus multiple reporter assays plus mutagenesis, nine distinct mutations tested, single lab\",\n      \"pmids\": [\"31376383\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"VEGFR2 Y1175 signaling through PLCγ1 is required for endothelial specification of VEGFR2+ vascular progenitors from embryonic stem cells; VEGFR3 does not activate PLCγ1 and does not direct endothelial differentiation, distinguishing the VEGFR2-PLCγ1 axis as unique for endothelial specification.\",\n      \"method\": \"Chimeric VEGFR2/VEGFR3 receptors in ES cell differentiation system; PLCγ1 activation assays; endothelial differentiation markers\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — receptor chimera in vitro differentiation system with functional readout, single lab\",\n      \"pmids\": [\"19706681\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"PDK1 regulates PLCγ1 activation through direct association of the two enzymes and modulation of PLCγ1 tyrosine phosphorylation; this PDK1-PLCγ1 pathway is important for cancer cell invasion.\",\n      \"method\": \"Co-immunoprecipitation; PLCγ1 tyrosine phosphorylation assays; cancer cell invasion assays; PDK1 inhibition/knockdown\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus functional invasion assay plus phosphorylation analysis, single lab\",\n      \"pmids\": [\"22454520\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"In unstimulated cells, the SH3 domain of PLCγ1 (not its SH2 domains) competes with the C-terminal SH3 domain of Grb2 for a phosphorylation-independent binding site at the very C-terminus of FGFR2; reduction of Grb2 allows PLCγ1 to bind FGFR2 basally, upregulating phospholipase activity and increasing PtdIns(4,5)P2 turnover, Ca²⁺, and cell invasion.\",\n      \"method\": \"Structural and binding analysis; competition assays; PtdIns(4,5)P2 turnover; Ca²⁺ measurements; invasion assays in cells with reduced Grb2\",\n      \"journal\": \"Nature structural & molecular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — structural binding analysis plus functional lipid and Ca²⁺ assays plus cell invasion, single lab with multiple orthogonal approaches\",\n      \"pmids\": [\"24440983\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Tr-kit promotes formation of a multimolecular complex containing Fyn, PLCγ1, and Sam68; tr-kit promotes association of Sam68 with PLCγ1 and Fyn via the PLCγ1 SH3 domain; this leads to PLCγ1 phosphorylation by Fyn and alters Sam68 subcellular localization and its release from bound RNA.\",\n      \"method\": \"Co-immunoprecipitation with antibodies to each complex partner; SH3 domain binding; in-cell expression studies; RNA binding assays\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP of three partners plus functional subcellular localization readout, single lab\",\n      \"pmids\": [\"14647465\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"LKB1 is directly phosphorylated by Lck at tyrosines 36, 261, and 365; LKB1 interacts predominantly with LAT and PLCγ1 following TCR stimulation; loss of LKB1 impairs recruitment of PLCγ1 to the LAT signalosome and reduces PLCγ1 tyrosine phosphorylation, causing defective thymocyte positive selection.\",\n      \"method\": \"Lck-Cre/CD4-Cre conditional LKB1 knockout mice; co-immunoprecipitation; tyrosine phosphorylation analysis; T cell signaling and thymocyte development assays\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with co-IP and phosphorylation analysis, single lab\",\n      \"pmids\": [\"21487392\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Scaffold protein SLP-76 pY173IDR motif binds to the C-terminal SH2 domain (SH2C) of PLCγ1 with significant affinity despite not conforming to the canonical pY-SH2 recognition motif; this interaction competes with the autoinhibited conformation of the SH2C domain, exposing the ITK recognition element and releasing Y783 for ITK-mediated phosphorylation and PLCγ1 activation.\",\n      \"method\": \"NMR spectroscopy; mutagenesis; in vitro binding assays; competition assays with phosphopeptides\",\n      \"journal\": \"Journal of molecular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR structural analysis plus quantitative binding assays plus mutagenesis, mechanistic detail at molecular resolution\",\n      \"pmids\": [\"25916191\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"RIAM (Rap1-GTP-interacting adaptor molecule) regulates TCR-mediated signaling by controlling translocation of phosphorylated PLCγ1 to the actin cytoskeleton, which is required to bring PLCγ1 close to its substrate PtdIns(4,5)P2; loss of RIAM impairs IP3 generation, Ca²⁺ mobilization, NFAT nuclear translocation, and IL-2 expression.\",\n      \"method\": \"shRNA knockdown of RIAM; IP3 assay; Ca²⁺ mobilization; NFAT localization; co-localization of pPLCγ1 with actin; reconstitution with RIAM\",\n      \"journal\": \"Science signaling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — shRNA knockdown with reconstitution and multiple signaling readouts, single lab\",\n      \"pmids\": [\"19952372\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"PLCγ1 mediates axonal guidance downstream of the netrin-1/DCC complex through Src kinase activation; netrin-1/DCC activates PLCγ1 to induce actin cytoskeleton rearrangement; neuronal progenitor-specific knockout of Plcg1 in mice causes axon guidance defects in the mesencephalon and adult structural alterations in the corpus callosum, substantia innominata, and olfactory tubercle.\",\n      \"method\": \"Conditional neuronal progenitor-specific Plcg1 knockout mice; PLCγ1 activation assays; actin rearrangement assays; brain structural analysis in adults\",\n      \"journal\": \"EMBO reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — tissue-specific knockout with in vivo axon guidance and brain structure phenotypes plus molecular pathway epistasis\",\n      \"pmids\": [\"30224412\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"CD95 (soluble CD95L/s-CD95L) recruits PLCγ1 to the calcium-inducing domain (CID) within CD95, triggering Ca²⁺ signaling and Th17 inflammatory cell accumulation; the HIV protease inhibitor ritonavir disrupts the CD95-PLCγ1 interaction; CID peptidomimetics designed to block this interaction abrogate CD95-driven Ca²⁺ response and Th17 transmigration, and reduce lupus symptoms in mice.\",\n      \"method\": \"Large-scale inhibitor screen; structure-activity relationship; co-immunoprecipitation; Ca²⁺ flux assay; Th17 transmigration assay; in vivo lupus mouse model\",\n      \"journal\": \"Nature chemical biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — biochemical binding assay plus Ca²⁺ functional assay plus in vivo rescue, multiple orthogonal approaches\",\n      \"pmids\": [\"30429604\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"PLCγ1 signaling (specifically hypoxia-induced ROS-dependent PLCγ1 activation via mitochondrial complex III) generates IP3, triggers IP3R-mediated Ca²⁺ release, and mediates hypoxic vasoconstriction in pulmonary arterial smooth muscle cells; this pathway is specific to pulmonary (not mesenteric) arteries.\",\n      \"method\": \"shRNA knockdown of PLCγ1 and RISP; PLC inhibitor; IP3R antagonists; Ca²⁺ imaging; IP3 measurement; isolated pulmonary artery contraction\",\n      \"journal\": \"American journal of physiology. Lung cellular and molecular physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — shRNA knockdown plus pharmacological inhibitors with multiple functional readouts, single lab\",\n      \"pmids\": [\"23204067\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"PLCγ1 is activated downstream of EpoR-Jak2 (independently of Stat5) and is required for erythropoiesis: PLCγ1-deficient erythroid progenitors show impaired differentiation and colony-forming potential in vitro and in vivo; the top downstream effector identified is the histone variant macroH2A2 (encoded by H2afy2), whose inactivation recapitulates PLCγ1 depletion effects on erythroid maturation.\",\n      \"method\": \"Plcγ1 loss-of-function in HSCs; colony assays; flow cytometry; in vivo reconstitution; transcriptomic and DNA methylation analyses; macroH2A2 knockdown\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic loss-of-function with in vivo phenotype plus downstream effector identification, single lab\",\n      \"pmids\": [\"25394487\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"CD47 agonist peptides induce Ca²⁺-mediated, caspase-independent programmed cell death in CLL B cells through sustained phosphorylation of PLCγ1 at Y783; downregulation of PLCγ1 or pharmacological inhibition of PLCγ1 phosphorylation abolishes CD47-mediated killing.\",\n      \"method\": \"siRNA knockdown and pharmacological inhibition of PLCγ1; Ca²⁺ flux assays; cell death assays; xenograft mouse model\",\n      \"journal\": \"PLoS medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic and pharmacological inhibition with functional cell death readout in patient cells and mouse model, single lab\",\n      \"pmids\": [\"25734483\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"A de novo germline PLCG1 S1021F variant is a gain-of-function mutation causing immune dysregulation: it leads to increased IP3 production, intracellular Ca²⁺ release, and enhanced phosphorylation of ERK, p65, and p38; it activates NF-κB and type II IFN pathways in T cells and NF-κB and type I IFN pathways in monocytes; PLCγ1 inhibitor or JAK inhibitor reverses the upregulated gene expression.\",\n      \"method\": \"Whole exome sequencing; IP-One ELISA for IP3; Ca²⁺ flux assay; immunoblotting; luciferase reporter; single-cell RNA-seq; pharmacological inhibitor reversal in patient cells and cell lines\",\n      \"journal\": \"The Journal of allergy and clinical immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — direct enzymatic IP3 assay plus Ca²⁺ flux plus functional rescue with inhibitors in patient cells and cell lines, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"37422272\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"PLCG1 is required for AML1-ETO leukemic stem cell self-renewal; AE fusion protein induces PLCG1 expression by binding intergenic regulatory DNA elements; genetic inactivation of PLCG1 in murine and human AML inhibits AE-dependent self-renewal, proliferation, and leukemia maintenance in vivo; PLCG1 is dispensable for normal hematopoietic stem and progenitor cell function.\",\n      \"method\": \"Genetic inactivation of PLCG1; in vivo leukemia maintenance assays; normal HSC function assays; ChIP-seq identification of AE binding at PLCG1 regulatory elements; pharmacological Ca²⁺ signaling perturbation\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo genetic KO in multiple models (murine and human) plus ChIP-seq regulatory mechanism, replicated across systems\",\n      \"pmids\": [\"34695195\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"PLCγ1 suppression in KRAS-mutant lung adenocarcinoma cells during hypoxia promotes glycolytic metabolism by impairing Ca²⁺ entry into mitochondria, reducing mitochondrial ROS, preventing lipid peroxidation, and antagonizing apoptosis; loss of function of Plcg1 in KrasG12D-driven mouse lung adenocarcinoma increases glycolytic gene expression and boosts tumor growth.\",\n      \"method\": \"Lipidomic screen; PLCγ1 loss-of-function in cell lines; KrasG12D mouse model; mitochondrial Ca²⁺ and ROS measurements; metabolic assays\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo mouse genetic model plus mechanistic biochemical analysis with multiple readouts, multiple cell lines validated\",\n      \"pmids\": [\"33077911\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"PLCG1 is a substrate for chaperone-mediated autophagy (CMA): aberrant accumulation of PLCG1 caused by CMA blockage (LAMP2A reduction) results in calcium overload and induces nucleus pulposus cell senescence; knockdown of Plcg1 inhibits TNF-induced disc degeneration in rats.\",\n      \"method\": \"Structural and functional proteomic screens; immunoprecipitation; calcium flux assays; LAMP2A overexpression and Plcg1 knockdown in rat disc degeneration model; immunoassays on human specimens\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — proteomic substrate identification plus in vivo rat model plus Ca²⁺ functional assay, single lab\",\n      \"pmids\": [\"39212196\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"NDRG1 forms a complex with PLCγ1 through NDRG1 phosphorylation sites and is required for VEGF-A-induced PLCγ1 and ERK1/2 activation in endothelial cells; Ndrg1−/− mice exhibit impaired VEGF-A-induced angiogenesis without affecting VEGFR2 expression or function, placing NDRG1 upstream of PLCγ1 in the VEGF-A angiogenic pathway.\",\n      \"method\": \"Co-immunoprecipitation; Ndrg1 knockout mice; corneal angiogenesis assay; PLCγ1 and ERK1/2 phosphorylation assays; aortic sprouting assay\",\n      \"journal\": \"Communications biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo KO with co-IP and multiple functional readouts, single lab\",\n      \"pmids\": [\"32144393\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Kaposi's sarcoma herpesvirus K15 protein directly recruits PLCγ1, activating calcineurin/NFAT1-dependent RCAN1 expression and promoting angiogenic tube formation; deletion or siRNA silencing of K15 abrogates these effects.\",\n      \"method\": \"Co-immunoprecipitation; NFAT luciferase reporter; siRNA knockdown; angiogenic tube formation assay; KSHV K15 deletion mutant\",\n      \"journal\": \"PLoS pathogens\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus reporter plus functional angiogenesis assay with genetic deletion, single lab\",\n      \"pmids\": [\"23028325\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Phospho-STAT3 (Y705) directly associates with PLCγ1 in colorectal cancer cells; PLCγ1 activity is reduced in STAT3 Y705F mutant cells; overexpression of constitutively active PLCγ1 rescues the transformation defect of STAT3 Y705F mutant cells, establishing a functional STAT3-PLCγ1 cross-talk in colorectal tumorigenesis.\",\n      \"method\": \"STAT3 Y705F knock-in; co-immunoprecipitation; constitutively active PLCγ1 rescue; colony and xenograft assays\",\n      \"journal\": \"Molecular cancer research : MCR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic knock-in plus co-IP plus functional rescue, single lab\",\n      \"pmids\": [\"21840932\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Molecular genetic analysis of FGFR1 signaling demonstrates that PLCγ1 activation downstream of FGFR1 is integral to maintenance of adult neural stem cell characteristics (capacity for neuronal and oligodendroglial differentiation), whereas the MAPK/Erk1/2 pathway is required and sufficient for NSC expansion and anti-differentiation.\",\n      \"method\": \"Molecular genetic approach using FGFR1 cytoplasmic residue mutants that selectively disrupt MAPK or PLC activation; adult rat NSC culture; proliferation and differentiation assays\",\n      \"journal\": \"Molecular brain\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — selective receptor mutagenesis with defined cellular phenotype readouts, single lab\",\n      \"pmids\": [\"19505325\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"PLC-γ1 activation is required for postbinding cell entry of influenza H1N1 (but not H3N2); H1N1 infection induces phosphorylation of PLCγ1 at Ser1248 immediately after infection downstream of EGFR; both pharmacological inhibition and shRNA knockdown of PLCγ1 suppress H1N1 replication.\",\n      \"method\": \"PLC-γ1-specific inhibitor; shRNA knockdown; PLCγ1 Ser1248 phosphorylation assay; viral replication assays; EGFR epistasis\",\n      \"journal\": \"Journal of virology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological plus genetic inhibition with viral entry assay and phosphorylation analysis, single lab\",\n      \"pmids\": [\"24155396\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"PLC-γ1 enzyme activity is required for insulin-induced DNA synthesis in hIRcB fibroblasts; the insulin receptor physically associates with PLCγ1; disruption of this interaction by microinjection of SH2 domains blocks mitogenesis; the requirement for PLC-γ1 is specifically for its lipase activity producing DAG (rescued by synthetic DAG but not IP3).\",\n      \"method\": \"PLC activity inhibitor; microinjection of SH2 domain peptides and neutralizing antibodies; DNA synthesis assay; DAG/IP3 rescue experiments\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — direct lipase activity requirement demonstrated by rescue experiments plus microinjection, single lab\",\n      \"pmids\": [\"11796522\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"PLCγ1 is required for IGF-I-dependent cell survival in suspension (anoikis protection); IGF-I rescues Null+ but not Null (Plcg1−/−) cells from suspension-induced apoptosis; IGF-I stimulates PLCγ1 tyrosine phosphorylation in both adherent and suspension cells.\",\n      \"method\": \"Plcg1−/− and re-expressed (Null+) fibroblasts; suspension-induced cell death assay; caspase-3 activity; PLCγ1 tyrosine phosphorylation assay\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic null cells with functional survival rescue assay, single lab\",\n      \"pmids\": [\"11973363\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"PLCγ2 cSH2 domain binds K15 (KSHV) and acts as a dominant-negative inhibitor of the K15P-PLCγ1 interaction; K15P-dependent PLCγ1 phosphorylation, NFAT-dependent promoter activation, and invasiveness/angiogenesis of KSHV-infected cells are abrogated by this domain; two amino acid substitutions enhance its inhibitory potency.\",\n      \"method\": \"Domain mapping of PLCγ1/PLCγ2 interactions with K15; co-immunoprecipitation; dominant-negative expression; NFAT reporter; invasion and angiogenesis assays\",\n      \"journal\": \"PLoS pathogens\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — domain mapping plus functional dominant-negative assay plus co-IP, single lab\",\n      \"pmids\": [\"26295810\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"Villin (ileal microvillar actin-binding protein) is tyrosine-phosphorylated and associates with PLCγ1 in brush border membrane; carbachol increases this association and tyrosine phosphorylation of villin; F-actin stabilization prevents carbachol-induced NaCl absorption inhibition, linking PLCγ1/villin-mediated cytoskeletal rearrangement to NaCl absorption regulation.\",\n      \"method\": \"Co-immunoprecipitation of villin and PLCγ1; Triton fractionation; tyrosine phosphorylation assays; jasplakinolide F-actin stabilization; NaCl absorption assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus pharmacological perturbation plus functional transport assay, single lab\",\n      \"pmids\": [\"9374490\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"EphA2 receptor tyrosine kinase interacts with PLCγ1 (identified by yeast two-hybrid screen); EphA2 kinase activity is required for PLCγ1 phosphorylation; genetic or pharmacologic inhibition of EphA2 decreases PLCγ1 phosphorylation; CRISPR knockout of PLCγ1 impairs tumor growth in vitro and in a KrasG12D-p53-Lkb1 mouse lung tumor model.\",\n      \"method\": \"Yeast two-hybrid screen; co-immunoprecipitation; kinase inhibition; CRISPR PLCγ1 knockout; in vivo mouse lung tumor model\",\n      \"journal\": \"Molecular cancer research : MCR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO in vivo plus co-IP plus kinase assay, single lab\",\n      \"pmids\": [\"32753469\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"PLCγ1 (phosphorylated at Y783) is activated by hypoxia through ROS-dependent signaling, generating IP3 that promotes PKCε activation, IP3R1 opening, Ca²⁺ release, and contraction in pulmonary artery smooth muscle cells; chronic hypoxia enhances PLCγ1 expression and activity in PASMCs, contributing to pulmonary hypertension.\",\n      \"method\": \"H2O2-induced PLCγ1 Y783 phosphorylation assay; PKCε knockout PASMCs; IP3R1 knockdown; IP3 production assay; Ca²⁺ imaging; pulmonary artery contraction assay\",\n      \"journal\": \"American journal of physiology. Lung cellular and molecular physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO (PKCε) plus molecular knockdown plus functional assays, single lab\",\n      \"pmids\": [\"29388468\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"TCR-mediated PLCγ1 activation is induced at LAT (simultaneous onset of LAT Y132 and PLCγ1 Y783 phosphorylation); PLCγ1 activation occurs more rapidly than LAT Y132 phosphorylation; the LAT-PLCγ1 association is more transient than LAT-Grb2; a pool of activated PLCγ1 translocates away from LAT to TCR-containing cellular structures.\",\n      \"method\": \"Phosphorylation kinetics analysis; co-immunoprecipitation; imaging of activated PLCγ1 localization at LAT vs. TCR complexes\",\n      \"journal\": \"Cellular signalling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — kinetic analysis plus co-IP plus imaging, single lab\",\n      \"pmids\": [\"24412752\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Cish SH2 domain binding to PLCγ1 is essential for PLCγ1 ubiquitination and degradation; Cish SH2 domain is required for Cish-mediated inhibition of Ca²⁺ release upon TCR stimulation; Cish is expressed mostly in the cytoplasm and does not cluster at the plasma membrane upon stimulation.\",\n      \"method\": \"Cish SH2 domain mutants (R107K) and D/BC domain mutants; PLCγ1 ubiquitination assay; Ca²⁺ flux assay; cytokine measurements; imaging of Cish localization\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — mutagenesis plus ubiquitination assay plus functional Ca²⁺ readout, single lab\",\n      \"pmids\": [\"29593227\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"PLCγ1 is a receptor tyrosine kinase- and integrin-regulated phospholipase that hydrolyzes PtdIns(4,5)P2 to generate IP3 and DAG; in T cells it is recruited to LAT via its SH2(N) domain, cross-links LAT into phase-separated signaling condensates, is primed by SLP-76 pY173 binding to its SH2(C) domain, and activated by Itk-mediated phosphorylation of Y783 to drive Ca²⁺/NFAT and PKC/AP-1 responses; in endothelial cells it transduces VEGFR2 (via pY1175) and is negatively regulated by c-Cbl ubiquitination; gain-of-function mutations in its autoinhibitory SH2 domain or catalytic region cause Y783-phosphorylation-independent constitutive activity driving lymphoma, angiosarcoma, and germline immune dysregulation; PLCγ1 is also essential for erythropoiesis, vasculogenesis, cardiac contractility, axon guidance, and pulmonary vasoconstriction, and serves as a substrate for CMA degradation linking Ca²⁺ homeostasis to cellular senescence.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"PLCγ1 is a receptor- and integrin-coupled phospholipase that hydrolyzes PtdIns(4,5)P2 to generate the second messengers IP3 and DAG, transducing tyrosine-kinase signals into Ca²⁺ mobilization and downstream transcriptional programs across immune, vascular, neuronal, and developmental contexts [#2, #8, #44]. In T cells, PLCγ1 is recruited through its N-terminal SH2 domain to the phosphorylated adaptor LAT, an interaction that is necessary but insufficient for stable engagement and requires additional contributions from its SH3 and C-terminal SH2 domains together with SLP-76, Vav1, and c-Cbl [#0, #1, #4]; PLCγ1 itself cross-links LAT into phase-separated condensates and protects LAT from CD45-mediated dephosphorylation, reinforcing the signalosome [#16]. Activation proceeds by a stepwise mechanism in which SLP-76 pY173 binds the autoinhibited SH2(C) domain, displacing it to expose the docking surface for Itk, which then phosphorylates the critical activating residue Y783 via a noncanonical SH2–kinase interaction [#17, #28]; productive enzyme activity drives Ca²⁺/NFAT and AP-1/NF-κB responses [#2, #22]. Beyond lymphocytes, PLCγ1 transduces VEGFR2 signaling through pY1175 for endothelial specification and is negatively regulated by c-Cbl-dependent ubiquitination that suppresses its tyrosine phosphorylation without degradation [#10, #11, #23]; it acts cell-autonomously in endothelium for vasculogenesis and artery development and is required for erythropoiesis, cardiac contractility, and netrin-1/DCC-dependent axon guidance in vivo [#3, #5, #6, #30, #33]. Gain-of-function mutations in the autoinhibitory SH2 domain or catalytic region (e.g., R707Q, S345F, S1021F) confer constitutive, Y783-phosphorylation-independent enzyme activity that elevates IP3 and drives NFAT/NF-κB/AP-1 signaling, underlying angiosarcoma, cutaneous T-cell lymphoma, Sézary syndrome, and germline immune dysregulation [#20, #21, #22, #35].\",\n  \"teleology\": [\n    {\n      \"year\": 1998,\n      \"claim\": \"Established the adaptor LAT as the upstream organizer required for TCR-driven PLCγ1 activation, defining where in the pathway PLCγ1 acts.\",\n      \"evidence\": \"Genetic complementation in LAT-deficient Jurkat cells with multiple signaling readouts\",\n      \"pmids\": [\"9846483\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define which PLCγ1 domains contact LAT\", \"Mechanism of PLCγ1 catalytic activation not addressed\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Assigned distinct functions to individual PLCγ1 domains, showing SH2(N) mediates LAT association and phosphorylation while SH3 binds SLP-76 and SH2(C) carries a separable signaling role.\",\n      \"evidence\": \"Domain-deletion mutagenesis, reciprocal co-IP, and reporter assays in Jurkat cells; PLCγ1-deficient Jurkat reconstitution\",\n      \"pmids\": [\"11390650\", \"11094067\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of the noncanonical SH2(C) function unresolved\", \"How Y783 phosphorylation links to enzyme activation not defined\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Demonstrated PLCγ1 is essential and nonredundant in vivo for erythropoiesis and vasculogenesis, extending its role beyond immune signaling.\",\n      \"evidence\": \"Plcg1 knockout mouse embryo analysis with colony-forming and immunostaining assays\",\n      \"pmids\": [\"11744703\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Upstream receptors driving these developmental roles not identified here\", \"Downstream effectors unknown\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Showed PLCγ1 participates in feedback signaling loops with kinases (c-Abl) and that its lipid-hydrolysis product depletion modulates partner kinase activity.\",\n      \"evidence\": \"Co-IP, kinase assays, PtdIns(4,5)P2 depletion, and chemotaxis assays\",\n      \"pmids\": [\"12652307\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological context of the c-Abl feedback loop limited\", \"Reciprocal regulation in vivo untested\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Defined PLCγ1 as a transducer of integrin and VEGF/FLT-1 signaling, linking Src-dependent Y783 phosphorylation to cell motility and cardiac contractility.\",\n      \"evidence\": \"Genetic KO/siRNA, Y783 mutagenesis, Src-family KO cells, zebrafish dead beat mutant cloning and rescue, and rat cardiomyocyte Ca²⁺ measurements\",\n      \"pmids\": [\"15944397\", \"15657076\", \"15998812\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How integrin- versus RTK-driven activation differ mechanistically not fully resolved\", \"Site specificity of phosphorylation under integrin engagement only partly mapped\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Identified c-Cbl as a negative regulator that ubiquitinates PLCγ1 within a VEGFR-2 ternary complex to suppress its phosphorylation without degradation, controlling angiogenesis.\",\n      \"evidence\": \"Binding assays, VEGFR-2 mutagenesis, c-Cbl siRNA, ubiquitylation and angiogenesis assays; later confirmed in c-Cbl knockout mice\",\n      \"pmids\": [\"17372230\", \"21242968\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of proteolysis-independent inhibition by ubiquitin unclear\", \"Whether this regulation operates outside endothelium untested\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Resolved the molecular activation switch in T cells: Itk docks via a noncanonical PLCγ1 SH2 surface to phosphorylate Y783, while PLCγ1 actively drives LAT phase separation and protects LAT phosphorylation.\",\n      \"evidence\": \"NMR spectroscopy, mutagenesis, in vitro phase-separation reconstitution, and dephosphorylation-protection assays\",\n      \"pmids\": [\"19955438\", \"33929486\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How condensate formation and Itk docking are temporally coordinated not fully defined\", \"In vivo relevance of phase separation untested\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Showed PLCγ1 acts cell-autonomously in endothelium downstream of VEGFR2 (via pY1175) for artery development and endothelial specification, requiring catalytic activity.\",\n      \"evidence\": \"Zebrafish allelic series with catalytic mutants and mosaic analysis; chimeric VEGFR2/VEGFR3 ES cell differentiation\",\n      \"pmids\": [\"19269286\", \"19706681\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Receptor-specific basis for VEGFR2 versus VEGFR3 selectivity at the PLCγ1 level only partly explained\", \"Effector pathways downstream of catalytic activity in arteries not enumerated\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Defined the priming step of activation: SLP-76 pY173 binds the autoinhibited SH2(C) domain, displacing it to expose the Itk recognition element and release Y783 for phosphorylation.\",\n      \"evidence\": \"NMR spectroscopy, quantitative binding, and competition assays with phosphopeptides\",\n      \"pmids\": [\"25916191\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full conformational cycle of the lipase in cells not visualized\", \"Quantitative ordering relative to LAT recruitment unresolved\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Extended PLCγ1 function to neuronal axon guidance in vivo and to CD95-driven Ca²⁺ signaling in inflammation, establishing therapeutically targetable interactions.\",\n      \"evidence\": \"Neuronal progenitor-specific Plcg1 knockout with brain structural phenotypes; CD95 CID inhibitor screen, co-IP, Ca²⁺ flux, and lupus mouse model\",\n      \"pmids\": [\"30224412\", \"30429604\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream cytoskeletal effectors of netrin-1/DCC-PLCγ1 only partly defined\", \"Generalizability of CID-targeting beyond modeled disease untested\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Established that recurrent autoinhibitory-domain and catalytic mutations confer constitutive, Y783-independent PLCγ1 activity driving lymphoma and angiosarcoma.\",\n      \"evidence\": \"Targeted sequencing plus reconstitution of R707Q and S345F mutants with IP3, Ca²⁺, NFAT reporter, and invasion readouts\",\n      \"pmids\": [\"25252913\", \"24497536\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Structural mechanism by which SH2-domain mutations relieve autoinhibition only inferred\", \"In vivo tumorigenicity of single mutants in autochthonous models not shown\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Generalized the gain-of-function model by showing diverse Sézary-syndrome mutations raise inositol phosphate output and NF-κB/AP-1/NFAT activation independent of Y783 phosphorylation.\",\n      \"evidence\": \"In vitro inositol phosphate assays, multiple reporter assays, and Y783-deficient mutant analysis across nine mutations\",\n      \"pmids\": [\"31376383\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Per-mutation structural consequences not individually resolved\", \"Therapeutic vulnerability of mutant-driven signaling not tested here\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Demonstrated that a de novo germline gain-of-function variant causes a Mendelian immune-dysregulation disorder via elevated IP3/Ca²⁺ and inflammatory transcription, reversible by PLCγ1 or JAK inhibition.\",\n      \"evidence\": \"Whole exome sequencing, IP3 ELISA, Ca²⁺ flux, scRNA-seq, and inhibitor reversal in patient cells\",\n      \"pmids\": [\"37422272\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genotype-phenotype spectrum of germline PLCG1 variants incomplete\", \"Long-term consequences in human carriers beyond initial characterization unknown\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Identified PLCγ1 as a chaperone-mediated autophagy substrate, linking its turnover to Ca²⁺ homeostasis and cellular senescence.\",\n      \"evidence\": \"Proteomic substrate identification, immunoprecipitation, Ca²⁺ assays, and LAMP2A/Plcg1 manipulation in a rat disc-degeneration model\",\n      \"pmids\": [\"39212196\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"CMA targeting motif on PLCγ1 not mapped\", \"Single-lab finding awaiting independent confirmation\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How distinct upstream contexts (RTK, integrin, immune receptor, mechanosensation) select among PLCγ1's varied effector outputs and how oncogenic versus germline activating mutations differentially rewire signaling remain incompletely defined.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified structural model linking each activation route to a specific output\", \"Context-dependent partner usage not systematically compared\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0016787\", \"supporting_discovery_ids\": [20, 22, 25, 44]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [16, 17, 28]},\n      {\"term_id\": \"GO:0008289\", \"supporting_discovery_ids\": [7, 25, 44]},\n      {\"term_id\": \"GO:0060089\", \"supporting_discovery_ids\": [0, 2, 8]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [1, 4, 16]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [12, 13]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [12, 13, 16]},\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [29, 47]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [0, 1, 2, 16, 17]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [8, 10, 23, 25]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [3, 5, 6, 30]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [20, 21, 22, 35, 36]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [34, 45]}\n    ],\n    \"complexes\": [\n      \"LAT signalosome\",\n      \"VEGFR2/PLCγ1/c-Cbl ternary complex\"\n    ],\n    \"partners\": [\n      \"LAT\",\n      \"SLP-76\",\n      \"ITK\",\n      \"CBL\",\n      \"SRC\",\n      \"VEGFR2\",\n      \"RAC1\",\n      \"FGFR2\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":5,"faith_total":5,"faith_pct":100.0}}