This is a zinc finger domain C2H2 type which can be found in SPIN1 docking protein (SPIN-DOC) and Epm2a-interacting protein 1 (Epm2aip1). SPIN-DOC is a Spindlin1 (SPIN1) regulator that directly binds and strongly disrupts its histone methylation reading ability, causing it to disassociate from chromatin [1]. Epm2aip1 is a glycogen synthase (GS)-associated protein. In the absence of Epm2aip1, the sensitivity of the liver to insulin, in which GS is a principal actor, is impaired [2].

1: A transcriptional coregulator, SPIN.DOC, attenuates the coactivator activity of Spindlin1. Bae N, Gao M, Li X, Premkumar T, Sbardella G, Chen J, Bedford MT; J Biol Chem. 2017;292:20808-20817. PMID:29061846

2: Deficiency of a glycogen synthase-associated protein, Epm2aip1, causes decreased glycogen synthesis and hepatic insulin resistance. Turnbull J, Tiberia E, Pereira S, Zhao X, Pencea N, Wheeler AL, Yu WQ, Ivovic A, Naranian T, Israelian N, Draginov A, Piliguian M, Frankland PW, Wang P, Ackerley CA, Giacca A, Minassian BA; J Biol Chem. 2013;288:34627-34637. PMID:24142699