Ragulator complex protein LAMTOR2

UniProtKB accession:  Q9JHS3

Grouped By:  Matching UniProtKB accession

UniProtKB description:  As part of the Ragulator complex it is involved in amino acid sensing and activation of mTORC1, a signaling complex promoting cell growth in response to growth factors, energy levels, and amino acids (By similarity). Activated by amino acids through a mechanism involving the lysosomal V-ATPase, the Ragulator plays a dual role for the small GTPases Rag (RagA/RRAGA, RagB/RRAGB, RagC/RRAGC and/or RagD/RRAGD): it (1) acts as a guanine nucleotide exchange factor (GEF), activating the small GTPases Rag and (2) mediates recruitment of Rag GTPases to the lysosome membrane (By similarity). Activated Ragulator and Rag GTPases function as a scaffold recruiting mTORC1 to lysosomes where it is in turn activated (By similarity). Adapter protein that enhances the efficiency of the MAP kinase cascade facilitating the activation of MAPK2 (PubMed:15263099).