G protein pathway suppressor 2 is involved in G protein-mitogen-activated protein kinase (MAPK) signaling cascades. When overexpressed in mammalian cells, this protein could potently suppress a RAS- and MAPK-mediated signal and interfere with JNK activity, suggesting that the function of this protein may be signal repression []. This protein is a component of the N-CoR-HDAC3 []and also the SMRT corepressor complexes [].
The G-protein pathway suppressor 2 (GPS2)-interacting domain is found in NCoR (nuclear receptor corepressor) proteins. NCoR1 and NCoR2 (also known as SMRT) are related corepressors that mediate transcriptional repression by unliganded nuclear receptors and other classes of transcriptional repressors. GPS2 is a stoichiometric subunit of the N-CoR-HDAC3 complex. GPS2 links the complex to membrane receptor-related intracellular JNK (c-Jun amino-terminal kinase) signalling pathways [].
