FUNCTION: Binding partner of the GTPase-activating protein FLCN: involved in the cellular response to amino acid availability by regulating the mTORC1 signaling cascade controlling the MiT/TFE factors TFEB and TFE3 (PubMed:18663353, PubMed:31672913). In low-amino acid conditions, component of the ly...
FUNCTION: Binding partner of the GTPase-activating protein FLCN: involved in the cellular response to amino acid availability by regulating the mTORC1 signaling cascade controlling the MiT/TFE factors TFEB and TFE3 (PubMed:18663353, PubMed:31672913). In low-amino acid conditions, component of the lysosomal folliculin complex (LFC) on the membrane of lysosomes, which inhibits the GTPase-activating activity of FLCN, thereby inactivating mTORC1 and promoting nuclear translocation of TFEB and TFE3 (PubMed:31672913). Upon amino acid restimulation, disassembly of the LFC complex liberates the GTPase-activating activity of FLCN, leading to activation of mTORC1 and subsequent cytoplasmic retention of TFEB and TFE3 (PubMed:31672913). Together with FLCN, regulates autophagy: following phosphorylation by ULK1, interacts with GABARAP and promotes autophagy (PubMed:25126726). In addition to its role in mTORC1 signaling, also acts as a co-chaperone of HSP90AA1/Hsp90: inhibits the ATPase activity of HSP90AA1/Hsp90, leading to activate both kinase and non-kinase client proteins of HSP90AA1/Hsp90 (PubMed:18403135). Acts as a scaffold to load client protein FLCN onto HSP90AA1/Hsp90 (PubMed:18403135). Competes with the activating co-chaperone AHSA1 for binding to HSP90AA1, thereby providing a reciprocal regulatory mechanism for chaperoning of client proteins (PubMed:18403135). May play a role in the signal transduction pathway of apoptosis induced by O6-methylguanine-mispaired lesions (By similarity). {ECO:0000250|UniProtKB:Q80TD3, ECO:0000269|PubMed:18403135, ECO:0000269|PubMed:18663353, ECO:0000269|PubMed:25126726, ECO:0000269|PubMed:31672913}.
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GO - Biological processes (BP):
intrinsic apoptotic signaling pathway in response to DNA damage [GO:0008630]; negative regulation of transcription by RNA polymerase II [GO:0000122]; positive regulation of peptidyl-serine phosphorylation [GO:0033138]; positive regulation of protein-containing complex assembly [GO:0031334]; protein ...
intrinsic apoptotic signaling pathway in response to DNA damage [GO:0008630]; negative regulation of transcription by RNA polymerase II [GO:0000122]; positive regulation of peptidyl-serine phosphorylation [GO:0033138]; positive regulation of protein-containing complex assembly [GO:0031334]; protein phosphorylation [GO:0006468]; regulation of protein phosphorylation [GO:0001932]
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GO - Molecular function (MF):
ATPase inhibitor activity [GO:0042030]; chaperone binding [GO:0051087]...
ATPase inhibitor activity [GO:0042030]; chaperone binding [GO:0051087]
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GO - Cellular component (CC):
centriolar satellite [GO:0034451]; cytoplasm [GO:0005737]; cytosol [GO:0005829]; lysosomal membrane [GO:0005765]...
centriolar satellite [GO:0034451]; cytoplasm [GO:0005737]; cytosol [GO:0005829]; lysosomal membrane [GO:0005765]
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