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Domain structure of PduO and homologs. ACA refers to ATP:Cob(I)alamin adenosyltransferase. Other domain names are as given in text. Striped regions show residues outside of recognized domains. Numbers show the size (residues) in domain examples taken from Salmonella enterica subsp. enterica serovar Typhimurium for PduO, from Streptomyces reticuli for HbpS, Klebsiella Pneumoniae for OrfY, and a multispecies Klebsiella for the adenosylcobalamin transferase.
