Structure and function of the photosynthetic reaction center fromRhodobacter sphaeroides
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- Ermler, U., Michel, H. & Schiffer, M. J Bioenerg Biomembr (1994) 26: 5. doi:10.1007/BF00763216
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The three-dimensional structure of the photosynthetic reaction center fromRhodobacter sphaeroides is described. The reaction center is a transmembrane protein that converts light into chemical energy. The protein has three subunits: L, M, and H. The mostly helical L and M subunits provide the scaffolding and the finely tuned environment in which the chromophores carry out electron transfer. The details of the protein-chromophore interactions are from studies of a trigonal crystal form that diffracted to 2.65-Å resolution. Functional studies of the multi-subunit complex by site-specific replacement of key amino acid residues are summarized in the context of the molecular structure.