Important roles of tyrosines in photosystem II and cytochrome oxidase.
Theoretical studies (B3LYP) on models of the active sites in Photosystem II (PSII) and cytochrome oxidase are discussed. The role of a tyrosyl radical in the O-O bond formation in PSII is investigated, as well as the tyrosyl radical formation. In cytochrome oxidase, mechanisms for O-O bond cleavage involving tyrosyl radical formation are investigated, together with possible roles for the tyrosine in the proton translocation.
Siegbahn
Per E M
PE
Department of Physics, Stockholm Centre for Physics, Astronomy and Biotechnology, Stockholm University, ALBANOVA, SE-106 91 Stockholm, Sweden.
Blomberg
Margareta R A
MR
D004579:Electron Transport; D003576:Electron Transport Complex IV / Q000737:chemistry* / Q000378:metabolism*; D005609:Free Radicals / Q000378:metabolism; D008958:Models, Molecular; D045332:Photosystem II Protein Complex / Q000737:chemistry* / Q000378:metabolism*; D018892:Proton-Motive Force; D014443:Tyrosine / Q000737:chemistry*
D005609:Free Radicals; D045332:Photosystem II Protein Complex; D014443:Tyrosine; D003576:Electron Transport Complex IV