This domain is found at the N-terminal end of COMM domain-containing protein 9 from humans and similar proteins from vertebrates. COMMD9 contains a conserved and unique motif termed the COMM (copper metabolism gene MURR1, Pfam:PF07258) domain at the C-terminal, which functions as an interface for protein-protein interactions. This entry represents the N-terminal domain, which shows a globular structure that consists of a six-helix bundle with a meander topology [1,2].

1: Structural insights into the architecture and membrane interactions of the conserved COMMD proteins. Healy MD, Hospenthal MK, Hall RJ, Chandra M, Chilton M, Tillu V, Chen KE, Celligoi DJ, McDonald FJ, Cullen PJ, Lott JS, Collins BM, Ghai R; Elife. 2018; [Epub ahead of print] PMID:30067224

2: COMMD proteins, a novel family of structural and functional homologs of MURR1. Burstein E, Hoberg JE, Wilkinson AS, Rumble JM, Csomos RA, Komarck CM, Maine GN, Wilkinson JC, Mayo MW, Duckett CS; J Biol Chem. 2005;280:22222-22232. PMID:15799966