title: Tuning electron transfer by ester-group of chlorophylls in bacterial photosynthetic reaction center.
abstract: Accessory chlorophylls (B(A/B)) in bacterial photosynthetic reaction center play a key role in charge-separation. Although light-exposed and dark-adapted bRC crystal structures are virtually identical, the calculated B(A) redox potentials for one-electron reduction differ. This can be traced back to different orientations of the B(A) ester-group. This tuning ability of chlorophyll redox potentials modulates the electron transfer from SP* to B(A).
authors.affiliation: Institute of Chemistry, Crystallography, Department of Biology, Chemistry, and Pharmacy, Free University of Berlin, Takustrasse 6, D-14195 Berlin, Germany.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ishikita
authors.forename: Bernhard
authors.initials: B
authors.lastname: Loll
authors.forename: Jacek
authors.initials: J
authors.lastname: Biesiadka
authors.forename: Artur
authors.initials: A
authors.lastname: Galstyan
authors.forename: Wolfram
authors.initials: W
authors.lastname: Saenger
authors.forename: Ernst-Walter
authors.initials: EW
authors.lastname: Knapp
mesh_terms: D002734:Chlorophyll / Q000378:metabolism*; D018360:Crystallography, X-Ray; D004579:Electron Transport; D004952:Esters / Q000378:metabolism; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry / Q000378:metabolism*; D011487:Protein Conformation; D012242:Rhodobacter sphaeroides / Q000378:metabolism
chemical_list: D004952:Esters; D045322:Photosynthetic Reaction Center Complex Proteins; D002734:Chlorophyll