Crystallographic Studies of the Photosynthetic Reaction Center from Wild Type Rhodobacter sphaeroides (Y Strain)
Reaction centers (RC) from various purple bacteria are expected to show many structural similarities. Indeed they fulfill analogous functions, and they are built in the same way by three polypeptide chains bearing a number of cofactors: four bacteriochlorophylls, two bacteriopheophytins, one carotenoid, two quinones and a metal ion (most often Fe). Thus the structure of the Rps. viridis RC, the first to be resolved at atomic resolution (1–3) could be considered as a model for this family of pigment-protein complexes. Very recently, the main structural features of Rps. viridis RC have been shown to be conserved in the R26 Rb. sphaeroides RC (4–7).
KeywordsReaction Center Purple Bacterium Vapour Diffusion Main Structural Feature Photosynthetic Bacterial Reaction
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