The origin and evolution of oxygenic photosynthesis.
The evolutionary developments that led to the ability of photosynthetic organisms to oxidize water to molecular oxygen are discussed. Two major changes from a more primitive non-oxygen-evolving reaction center are required: a charge-accumulating system and a reaction center pigment with a greater oxidizing potential. Intermediate stages are proposed in which hydrogen peroxide was oxidized by the reaction center, and an intermediate pigment, similar to chlorophyll d, was present.
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Department of Chemistry and Biochemistry, Center for the Study of Early Events in Photosynthesis, Arizona State University, Tempe 85287-1604, USA.
Hartman
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D001429:Bacteriochlorophylls / Q000378:metabolism; D005075:Biological Evolution; D002734:Chlorophyll / Q000378:metabolism; D000458:Cyanobacteria / Q000502:physiology; D006861:Hydrogen Peroxide / Q000378:metabolism*; D045342:Light-Harvesting Protein Complexes; D008954:Models, Biological; D010084:Oxidation-Reduction; D010100:Oxygen / Q000502:physiology*; D010788:Photosynthesis; D045322:Photosynthetic Reaction Center Complex Proteins; D014867:Water / Q000378:metabolism
D001429:Bacteriochlorophylls; D045342:Light-Harvesting Protein Complexes; D045322:Photosynthetic Reaction Center Complex Proteins; D014867:Water; D002734:Chlorophyll; C107509:chlorophyll d; D006861:Hydrogen Peroxide; D010100:Oxygen