Proton uptake in the reaction center mutant L210DN from Rhodobacter sphaeroides via protonated water molecules.

doi:10.1021/bi060742q

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Article

Proton uptake in the reaction center mutant L210DN from Rhodobacter sphaeroides via protonated water molecules.

Biochemistry - 21 Nov 2006

Hermes Sabine, Stachnik Joanna M, Onidas Delphine, Remy André, Hofmann Eckhard, Gerwert Klaus

Abstract excerpt

The reaction center (RC) of Rhodobacter sphaeroides uses light energy to reduce and protonate a quinone molecule, QB (the secondary quinone electron acceptor), to form quinol, QBH2. Asp210 in the L-subunit has been shown to be a catalytic residue in this process. Mutation of Asp210 to Asn leads to a deceleration of reoxidation of QA- in the QA-QB --> QAQB- transition. Here we determined the structure of the...

Topics

Electrons
Models, Molecular
Mutation
Photosynthetic Reaction Center Complex Proteins
Protein Conformation
Protons
Rhodobacter sphaeroides
Spectroscopy, Fourier Transform Infrared
Water

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Open in PubMed

Identifiers

PMID: 17105193
DOI: 10.1021/bi060742q

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