1clt

Theoretical Model: The protein structure described on this page was determined theoretically, and hence should be interpreted with caution.

PHOTOSYNTHETIC REACTION CENTER, THEORETICAL MODEL

spinqualitylabelsall models 1clt Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, PDBsum, ProSAT Publication Abstract from PubMed The reaction center (RC) from the photosynthetic bacterium Rhodobacter (Rb.) capsulatus has been the subject of a considerable amount of molecular biological and spectroscopic work aimed at improving our understanding of the primary steps of photosynthesis. However, no three-dimensional structure is available for this protein. We present here a model obtained by combining information from the structure of the highly homologous RC from Rhodopseudomonas (Rps.) viridis with molecular mechanics and simulated annealing calculations. In the Rb. capsulatus model the orientations of the bacteriochlorophyll monomer and the bacteriopheophytin on the branch inactive in electron transfer differ significantly from those in the RCs of Rps. viridis and Rb. sphaeroides. The bacteriopheophytin orientational difference is in good accord with previous linear dichroism measurements. A comparison is made of interactions between the pigments and the protein environment that may be of functional significance in Rps. viridis, Rb. sphaeroides, and Rb. capsulatus. Structural model of the photosynthetic reaction center of Rhodobacter capsulatus.,Foloppe N, Ferrand M, Breton J, Smith JC Proteins. 1995 Jul;22(3):226-44. PMID:7479696 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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