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Role of cytochrome b-559 in the protection and assembly of photosystem two
Reference
P15038
Principal Investigator / Supervisor
Professor Peter Nixon
Co-Investigators /
Co-Supervisors
Institution
Imperial College London
Department
Biological Sciences
Funding type
Research
Value (£)
214,748
Status
Completed
Type
Research Grant
Start date
18/03/2002
End date
17/06/2005
Duration
39 months
Abstract
Photoinactivation of the photosystem two complex (PSII) is a major contributor to the loss of biomass production at high-light intensities in plants and other oxygenic photosynthetic organisms. This work aims to clarify the role of cytochrome b-559 in the assembly and photo-protection of PSII. Newly constructed mutants of the green alga, Chlamydomonas reinhardtii, in which PSII still assembles but the haem is no longer bound to the cytochrome, are more sensitive to photoinactivation than WT. Experiments using both isolated PSII complexes and whole cells will test whether the cytochromes protective role is exerted before or after incorporation of the Mn cluster into PSII or at both stages. A role as a nucleation factor in PSII assembly will be investigated through isolation of PSII sub-complexes containing cytochrome b-559 but lacking the D1 subunit.
Summary
unavailable
Committee
Closed Committee - Plant & Microbial Sciences (PMS)
Research Topics
X – not assigned to a current Research Topic
Research Priority
X – Research Priority information not available
Research Initiative
X - not in an Initiative
Funding Scheme
X – not Funded via a specific Funding Scheme
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