Regulatory subunit of protein phosphatase 1 (PP1c) that acts as a M-Ras/MRAS effector and participates in MAPK pathway activation. Upon M-Ras/MRAS activation, targets PP1c to specifically dephosphorylate the 'Ser-259' inhibitory site of RAF1 kinase and stimulate RAF1 activity at specialized signaling complexes. Interacts with M-Ras/MRAS, and RAF1 (PubMed:16630891, PubMed:25137548). Forms a multiprotein complex with Ras (M-Ras/MRAS), Raf (RAF1) and protein phosphatase 1 (PPP1CA, PPP1CB and PPP1CC) (PubMed:16630891, PubMed:25137548). Interacts with ERBIN; disrupts the interaction with RAF1 and Ras, leading to prevent activation of the Ras signaling pathway (PubMed:16301319). Specifically binds K-Ras/KRAS, M-Ras/MRAS and N-Ras/NRAS but not H-Ras/HRAS (PubMed:9674433). Interacts with LZTR1 (PubMed:30368668). Translocates from cytoplasm to nucleus upon growth factor stimulation. The disease is caused by variants affecting the gene represented in this entry. Belongs to the SHOC2 family. Extended N-terminus. Truncated N-terminus. The matchmaker - Issue 121 of September 2010