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Characterisation and crystallisation of LH2 from Rhodopseudomonas palustris
Reference
B04960
Principal Investigator / Supervisor
Dr Miroslav Papiz
Co-Investigators /
Co-Supervisors
Dr Anna Lawless
Institution
STFC - Laboratories
Department
Photon Science
Funding type
Research
Value (£)
95,117
Status
Completed
Type
Research Grant
Start date
05/02/1996
End date
05/02/1999
Duration
36 months
Abstract
In recent months the first X-ray structure of a bacterial integral membrane LH2 from Rps. acidophila strain 10050 has been determined to 2.5 Angstroms resolution with data collected at the SRS Daresbury. We wish to extend this work to the crystal structure of a low light (LL) form of LH2 from Rps. palustris. It differs in the bacteriochlorophyll/carotenoid ratio of 3:1 compare to 2:1 of the high light (HL) form. The ratio of B800 to B850 changes from 1:2 in the HL form to 2:3 or perhaps as high as 2:1 in the LL form. The understanding of these particular pigment modifications in LL LH2 may give insight into their role in low light adaptation, and give additional information about light trapping mechanisms.
Summary
unavailable
Committee
Closed Committee - Biomolecular Sciences (BMS)
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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