This family includes reductive activator of CoFeSP (RACo) proteins, Swiss:Q3ACS2. Structure analysis of RACo indicate that it contains 4 regions: N-terminal region Pfam:PF00111 (residues 3-94) binding the [2Fe-2S] cluster, a linker region (residues 95-125), the middle region (residues 126-206), and the large C-terminal domain Pfam:PF14574 (residues 207-630). This entry pertains to the middle region. This region contains residues in their alpha-helices (H6 and H7) that mediate dimerization with subdomain I of the C-terminal domain.

1: Redox-dependent complex formation by an ATP-dependent activator of the corrinoid/iron-sulfur protein. Hennig SE, Jeoung JH, Goetzl S, Dobbek H; Proc Natl Acad Sci U S A. 2012;109:5235-5240. PMID:22431597