Has guanine nucleotide-binding activity but weak intrinsic GTPase activity. Probably required for the amino acid- induced relocalization of mTORC1 to the lysosomes and its subsequent activation by the GTPase RHEB. This is a crucial step in the activation of the TOR signaling cascade by amino acids. Forms a heterodimer with RRAGA in a sequence-independent manner. Binds GTP. Interacts with NOL8 and RRAGB. Belongs to the GTR/RAG GTP-binding protein family. Note: This description may include information from UniProtKB.
Cellular Component: lysosome; cytoplasm; nucleus
Molecular Function: GTPase activity; protein binding; GDP binding; GTP binding; protein heterodimerization activity; magnesium ion binding
Biological Process: transcription, DNA-dependent; apoptosis; GTP catabolic process; small GTPase mediated signal transduction; RNA splicing; cell growth; positive regulation of TOR signaling pathway
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.