Evolution in a Family of Chelatases Facilitated by the Introduction of Active Site Asymmetry and Protein Oligomerization.
Romao, C.V., Ladakis, D., Lobo, S.A., Carrondo, M.A., Brindley, A.A., Deery, E., Matias, P.M., Pickersgill, R.W., Saraiva, L.M., Warren, M.J.(2011) Proc Natl Acad Sci U S A 108: 97
- PubMed: 21173279 
- DOI: 10.1073/pnas.1014298108
- Primary Citation of Related Structures:  
2XVX, 2XVZ, 2XWP, 2XWQ, 2XWS - PubMed Abstract: 
The class II chelatases associated with heme, siroheme, and cobalamin biosynthesis are structurally related enzymes that insert a specific metal ion (Fe(2+) or Co(2+)) into the center of a modified tetrapyrrole (protoporphyrin or sirohydrochlorin). The structures of two related class II enzymes, CbiX(S) from Archaeoglobus fulgidus and CbiK from Salmonella enterica, that are responsible for the insertion of cobalt along the cobalamin biosynthesis pathway are presented in complex with their metallated product ...