Members of this family inhibits the transactivation activity of the MyoD family of myogenic factors [1]. They affect axin-mediated regulation of the Wnt and JNK signaling pathways [2], and regulate expression from viral promoters [3].

1: I-mf, a novel myogenic repressor, interacts with members of the MyoD family. Chen CM, Kraut N, Groudine M, Weintraub H; Cell. 1996;86:731-741. PMID:8797820

2: I-mfa domain proteins interact with Axin and affect its regulation of the Wnt and c-Jun N-terminal kinase signaling pathways. Kusano S, Raab-Traub N; Mol Cell Biol. 2002;22:6393-6405. PMID:12192039

3: Molecular cloning of a novel human I-mfa domain-containing protein that differently regulates human T-cell leukemia virus type I and HIV-1 expression. Thebault S, Gachon F, Lemasson I, Devaux C, Mesnard JM; J Biol Chem. 2000;275:4848-4857. PMID:10671520