The role of TyrD in the electron transfer kinetics in Photosystem II

Biochim Biophys Acta. 2008 Dec;1777(12):1510-7. doi: 10.1016/j.bbabio.2008.09.002. Epub 2008 Sep 13.

Abstract

Redox-active tyrosine (Tyr) D is indirectly involved in controlling the primary electron transfer in PSII. The presence of the oxidized TyrD renders P680+ more oxidizing by localizing the charge more on PD1 and thus facilitates trapping of the excitation energy in PSII. We also conclude that the mechanism of the primary charge separation and stabilization is altered upon QA reduction.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chlorophyll / chemistry
  • Chlorophyll A
  • Cyanobacteria / metabolism*
  • Electron Transport
  • Fluorescence
  • Kinetics
  • Models, Molecular
  • Mutant Proteins / chemistry
  • Oxidation-Reduction
  • Photosystem II Protein Complex / chemistry*
  • Thermodynamics
  • Time Factors
  • Tyrosine / metabolism*

Substances

  • Mutant Proteins
  • Photosystem II Protein Complex
  • Chlorophyll
  • Tyrosine
  • Chlorophyll A