FUNCTION: E3 ubiquitin-protein ligase which accepts ubiquitin from specific E2 ubiquitin-conjugating enzymes, and transfers it to substrates, generally promoting their degradation by the proteasome. Negatively regulates TCR (T-cell receptor), BCR (B-cell receptor) and FCER1 (high affinity immunoglob...
FUNCTION: E3 ubiquitin-protein ligase which accepts ubiquitin from specific E2 ubiquitin-conjugating enzymes, and transfers it to substrates, generally promoting their degradation by the proteasome. Negatively regulates TCR (T-cell receptor), BCR (B-cell receptor) and FCER1 (high affinity immunoglobulin epsilon receptor) signal transduction pathways. In naive T-cells, inhibits VAV1 activation upon TCR engagement and imposes a requirement for CD28 costimulation for proliferation and IL-2 production. Also acts by promoting PIK3R1/p85 ubiquitination, which impairs its recruitment to the TCR and subsequent activation. In activated T-cells, inhibits PLCG1 activation and calcium mobilization upon restimulation and promotes anergy. In B-cells, acts by ubiquitinating SYK and promoting its proteasomal degradation. Slightly promotes SRC ubiquitination. May be involved in EGFR ubiquitination and internalization. May be functionally coupled with the E2 ubiquitin-protein ligase UB2D3. In association with CBL, required for proper feedback inhibition of ciliary platelet-derived growth factor receptor-alpha (PDGFRA) signaling pathway via ubiquitination and internalization of PDGFRA (By similarity). {ECO:0000250|UniProtKB:Q3TTA7, ECO:0000269|PubMed:10022120, ECO:0000269|PubMed:10086340, ECO:0000269|PubMed:11087752, ECO:0000269|PubMed:11526404, ECO:0000269|PubMed:14661060, ECO:0000269|PubMed:20525694}.
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GO - Biological processes (BP):
immune response [GO:0006955]; intracellular signal transduction [GO:0035556]; negative regulation of alpha-beta T cell proliferation [GO:0046642]; negative regulation of epidermal growth factor-activated receptor activity [GO:0007175]; negative regulation of T cell receptor signaling pathway [GO:005...
immune response [GO:0006955]; intracellular signal transduction [GO:0035556]; negative regulation of alpha-beta T cell proliferation [GO:0046642]; negative regulation of epidermal growth factor-activated receptor activity [GO:0007175]; negative regulation of T cell receptor signaling pathway [GO:0050860]; NLS-bearing protein import into nucleus [GO:0006607]; peptidyl-amino acid modification [GO:0018193]; positive regulation of protein catabolic process [GO:0045732]; positive regulation of protein ubiquitination [GO:0031398]; positive regulation of T cell anergy [GO:0002669]; regulation of GTPase activity [GO:0043087]; regulation of platelet-derived growth factor receptor-alpha signaling pathway [GO:2000583]; regulation of protein binding [GO:0043393]; signal transduction [GO:0007165]; T cell activation [GO:0042110]; T cell receptor signaling pathway [GO:0050852]
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GO - Molecular function (MF):
calcium ion binding [GO:0005509]; phosphotyrosine residue binding [GO:0001784]; receptor tyrosine kinase binding [GO:0030971]; SH3 domain binding [GO:0017124]; ubiquitin protein ligase activity [GO:0061630]; zinc ion binding [GO:0008270]...
calcium ion binding [GO:0005509]; phosphotyrosine residue binding [GO:0001784]; receptor tyrosine kinase binding [GO:0030971]; SH3 domain binding [GO:0017124]; ubiquitin protein ligase activity [GO:0061630]; zinc ion binding [GO:0008270]
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GO - Cellular component (CC):
cytosol [GO:0005829]; membrane raft [GO:0045121]; nucleoplasm [GO:0005654]; plasma membrane [GO:0005886]...
cytosol [GO:0005829]; membrane raft [GO:0045121]; nucleoplasm [GO:0005654]; plasma membrane [GO:0005886]
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