GPS2_interact is the more N-terminal domain of two co-repressor protein-families found in vertebrates. The domain is found in NCoR and SMRT proteins; N-CoR (nuclear receptor co-repressor) and SMRT (silencing mediator for retinoid and thyroid receptors) 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 [1].

1: The N-CoR-HDAC3 nuclear receptor corepressor complex inhibits the JNK pathway through the integral subunit GPS2. Zhang J, Kalkum M, Chait BT, Roeder RG; Mol Cell. 2002;9:611-623. PMID:11931768