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 stimulate Raf activity at specialized signaling complexes upon Ras activation (By similarity). Belongs to the SHOC2 family. In their assays, PubMed:11741918 could not detect any effect on activation of the ERK pathway.