The level of let-60 controls the switch between vulval and hypodermal cell fates during C.elegans vulval induction (PubMed:2257629, PubMed:2123303, PubMed:24929033, PubMed:28135265, PubMed:20230814, PubMed:32053105, PubMed:23103556). May stimulate the guanine nucleotide exchange factor (GEF) activity of rap-1 (PubMed:10608844). May induce nuclear condensation (PubMed:23103556). Interacts with soc-2 (PubMed:9674433). Interacts (in GTP-bound form) with plc-1 (via Ras-associating domain 1) (PubMed:9497345). Expressed in body wall muscles and in the nervous system including ganglion, nerve ring dorsal and ventral nerve cords, motor neurons and sensory tail neurons. Belongs to the small GTPase superfamily. Ras family. Extended N-terminus.