Signal transducer in the Ras-MAPK signaling pathway that regulates cell proliferation and survival (PubMed:30712867). Ras proteins bind GDP/GTP and possess intrinsic GTPase activity (PubMed:30712867). Recognized by LZTR1 that mediates its ubiquitination by a BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex (PubMed:40934300). {ECO:0000269|PubMed:30712867, ECO:0000269|PubMed:40934300}. This is the function of NRAS (NRAS proto-oncogene, GTPase, Ensembl gene identifier ENSG00000213281).