Translational Frameshifting in the chlD Gene Gives a Clue to the Coevolution of the Chlorophyll and Cobalamin Biosyntheses.

ABSTRACT: Today, hundreds of prokaryotic species are able to synthesize chlorophyll and cobalamin (vitamin B12). An important step in the biosynthesis of these coenzymes is the insertion of a metal ion into a porphyrin ring. Namely, Mg-chelatase ChlIDH and aerobic Co-chelatase CobNST are utilized in the chlorophyll and vitamin B12 pathways, respectively. The corresponding subunits of these enzymes have common evolutionary origin. Recently, we have identified a highly conserved frameshifting signal in the chlD gene. This unusual regulatory mechanism allowed production of both the small and the medium chelatase subunits from the same gene. Moreover, the chlD gene appeared early in the evolution and could be at the starting point in the development of the chlorophyll and B12 pathways. Her

SUBMITTER: Kuznetsov S 

PROVIDER: S-EPMC9227772 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature