Mce4_CUP1 is a family of putative Mce4 transporters of cholesterol. The domain is found associated with Pfam:PF02470. The full TCDB classification for this family in conjunction with PF02470 is TC:3.A.1.27.4.

1: The actinobacterial mce4 locus encodes a steroid transporter. Mohn WW, van der Geize R, Stewart GR, Okamoto S, Liu J, Dijkhuizen L, Eltis LD; J Biol Chem. 2008;283:35368-35374. PMID:18955493