Correlating carbon monoxide oxidation with cox genes in the abundant Marine Roseobacter Clade.
The Marine Roseobacter Clade (MRC) is a numerically and biogeochemically significant component of the bacterioplankton. Annotation of multiple MRC genomes has revealed that an abundance of carbon monoxide dehydrogenase (CODH) cox genes are present, subsequently implying a role for the MRC in marine CO cycling. The cox genes fall into two distinct forms based on sequence analysis of the coxL gene; forms I and II. The two forms are unevenly distributed across the MRC genomes. Most (18/29) of the MRC genomes contain only the putative form II coxL gene. Only 10 of the 29 MRC genomes analysed have both the putative form II and the definitive form I coxL. None have only the form I coxL. Genes previously shown to be required for post-translational maturation of the form I CODH enzyme are absent from the MRC genomes containing only form II. Subsequent analyses of a subset of nine MRC strains revealed that only MRC strains with both coxL forms are able to oxidise CO.
Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, UK. micnli@mba.ac.uk
Michael
M
Cunliffe
D000445:Aldehyde Oxidoreductases / Q000235:genetics*; D002248:Carbon Monoxide / Q000378:metabolism*; D009097:Multienzyme Complexes / Q000235:genetics*; D010084:Oxidation-Reduction; D010802:Phylogeny; D010933:Plankton / Q000145:classification / Q000235:genetics; D041904:Roseobacter / Q000145:classification* / Q000201:enzymology / Q000235:genetics
D009097:Multienzyme Complexes; D002248:Carbon Monoxide; D000445:Aldehyde Oxidoreductases; C019823:carbon monoxide dehydrogenase