Acts as a Ras effector and participates in MAPK pathway activation. Probably acts as a regulatory subunit of protein phosphatase that specifically dephosphorylates Raf kinase and stimulates Raf activity at specialized signaling complexes upon Ras activation. Required for vulval development. Involved in fluid homeostasis. Plays a role in nicotinic acetylcholine receptor (nAChR)-mediated sensitivity to nicotine. Interacts with let-60. Belongs to the SHOC2 family.