Raptor Antibody (YA5994)

Lysosome membrane; Cytoplasm; Cytoplasmic granule

Tissue_specificity:It is highly expressed in skeletal muscle, and less expressed in the brain, lungs, small intestine, kidneys and placenta; it is widely expressed, with the highest expression levels in the nasal mucosa and pituitary gland, and the lowest expression levels in the spleen.

Q8N122 has 3 isomers: Q8N122-1: 149038 Da (predicted); Q8N122-2: 43256 Da (predicted); Q8N122-3: 131515 Da (predicted).
Insulin-stimulated phosphorylation at Ser-863 by MTOR and MAPK8 regulates mTORC1 activity (PubMed:19864431). Phosphorylated at Ser-863 by NLK in response to stress, disrupting the interaction with small GTPases Rag (RagA/RRAGA, RagB/RRAGB, RagC/RRAGC and/or RagD/RRAGD), thereby preventing lysosome recruitment and activation of the mTORC1 complex (PubMed:26588989). Osmotic stress also induces phosphorylation at Ser-696, Thr-706 and Ser-863 by MAPK8 (PubMed:19864431, PubMed:22493283). Ser-863 phosphorylation is required for phosphorylation at Ser-855 and Ser-859 (PubMed:19864431). In response to nutrient limitation, phosphorylated at Ser-722 and Ser-792 by AMPK; phosphorylation promotes interaction with 14-3-3 proteins, leading to negative regulation of the mTORC1 complex (PubMed:18439900). Phosphorylation at Ser-722 and Ser-792 by AMPK in response to glucose starvation inhibits O-GlcNAcylation by OGT and subsequent activation of mTORC1 (PubMed:37541260). In response to growth factors, phosphorylated at Ser-719, Ser-721 and Ser-722 by RPS6KA1, which stimulates mTORC1 activity (PubMed:18439900, PubMed:18722121). Phosphorylation at Ser-791 by PKA downstream of cAMP inhibits the mTORC1 complex (PubMed:31112131). Phosphorylated at Ser-877 by TBK1, leading to negative regulation of the mTORC1 complex (PubMed:31530866);O-GlcNAcylated by OGT upon glucose sufficiency, promoting interaction with small GTPases Rag (RagA/RRAGA, RagB/RRAGB, RagC/RRAGC and/or RagD/RRAGD) and subsequent recruitment of mTORC1 to lysosomal membranes, leading to activation of the mTORC1 complex (PubMed:37541260). Phosphorylation at Ser-722 and Ser-792 by AMPK in response to glucose starvation inhibits O-GlcNAcylation (PubMed:37541260);Acetylation at Lys-1097 by EP300/p300 in response to leucine metabolite acetyl-coA promotes its activity, leading to activation of the mTORC1 complex (PubMed:30197302, PubMed:32561715). Acetylation is decreased in response to fasting (By similarity);Ubiquitinated, leading to its degradation by the proteasome (PubMed:34290272, PubMed:35927303). Deubiquitinated by OTUB1 via a non-catalytic mechanism (PubMed:35927303). Ubiquitinated by an E3 ubiquitin ligase complex containing VHL (PubMed:34290272)

Part of the mechanistic target of rapamycin complex 1 (mTORC1) which contains MTOR, MLST8 and RPTOR (PubMed:12408816, PubMed:24403073, PubMed:25940091, PubMed:27909983, PubMed:29236692, PubMed:31601708, PubMed:31601764, PubMed:36697823). mTORC1 associates with AKT1S1/PRAS40, which inhibits its activity (PubMed:17386266, PubMed:31601764). mTORC1 associates with DEPTOR, which regulates its activity (PubMed:34519268, PubMed:34519269). mTORC1 binds to and is inhibited by FKBP12-rapamycin (PubMed:12408816, PubMed:15066126). Forms a complex with MTOR under both leucine-rich and -poor conditions (PubMed:12408816, PubMed:25940091, PubMed:31601708, PubMed:31601764). Interacts with (via TOS motifs) EIF4EBP1 and RPS6KB1; interaction is independent of its association with MTOR (PubMed:12150925, PubMed:12150926, PubMed:12747827, PubMed:24403073). Binds preferentially to poorly or non-phosphorylated forms of EIF4EBP1, and this binding is critical to the ability of MTOR to catalyze phosphorylation (PubMed:12747827, PubMed:24403073). Interacts with ULK1 in a nutrient-dependent manner; the interaction is reduced during starvation (PubMed:19211835). Interacts with GTP-bound form of RagA/RRAGA or RagB/RRAGB and GDP-bound form of RagC/RRAGC or RagD/RRAGD, promoting recruitment of mTORC1 to the lysosomes (PubMed:31601708, PubMed:31601764). Interacts (when phosphorylated by AMPK) with 14-3-3 protein, leading to inhibition of its activity (PubMed:18439900). Interacts with SPAG5; SPAG5 competes with MTOR for RPTOR-binding, resulting in decreased mTORC1 formation (PubMed:23953116). Interacts with WAC; WAC positively regulates MTOR activity by promoting the assembly of the TTT complex composed of TELO2, TTI1 and TTI2 and the RUVBL complex composed of RUVBL1 and RUVBL2 into the TTT-RUVBL complex which leads to the dimerization of the mTORC1 complex and its subsequent activation (PubMed:26812014). Interacts with G3BP1 (PubMed:23953116). The complex formed with G3BP1 and SPAG5 is increased by oxidative stress (PubMed:23953116). Interacts with HTR6 (PubMed:23027611). Interacts with PIH1D1 (PubMed:24036451). Interacts with LARP1 (PubMed:25940091). Interacts with BRAT1 (PubMed:25657994). Interacts with SIK3 (PubMed:30232230). Interacts with SLC38A7; this interaction mediates the recruitment of mTORC1 to the lysosome and its subsequent activation (PubMed:35561222)

Q8N122