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Oxidationreduction signalling components in regulatory pathways of state transitions and photosystem
 

Summary: Oxidation­reduction signalling components in regulatory
pathways of state transitions and photosystem
stoichiometry adjustment in chloroplastspce_2349 347..359
SUJITH PUTHIYAVEETIL, ISKANDER M. IBRAHIM & JOHN F. ALLEN
Queen Mary, University of London, School of Biological and Chemical Sciences, London, UK
ABSTRACT
State transitions and photosystem stoichiometry adjust-
ment are two oxidation­reduction (redox)-regulated accli-
matory responses in photosynthesis. State transitions are
short-term adaptations that, in chloroplasts, involve revers-
ible post-translational modification by phosphorylation of
light-harvesting complex II (LHC II). Photosystem stoichi-
ometry adjustments are long-term responses involving
transcriptional regulation of reaction centre genes. Both
responses are initiated by changes in light quality and are
regulated by the redox state of plastoquinone (PQ). The
LHC II kinase involved in the state 2 transition is a serine/
threonine kinase known as STT7 in Chlamydomonas, and
as STN7 in Arabidopsis. The phospho-LHC II phosphatase
that produces the state 1 transition is a PP2C-type protein

  

Source: Allen, John F. - School of Biological and Chemical Sciences, Queen Mary, University of London

 

Collections: Renewable Energy; Biology and Medicine