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Updated: May 26, 2026

Generation of Marked and Markerless Mutants in Model Cyanobacterial Species
Published on: May 29, 2016
Sequence variation at the oxygen-evolving centre of photosystem II: a new class of 'rogue' cyanobacterial D1 proteins
1Division of Molecular Biosciences, Imperial College, Exhibition Road, London, SW7 2AZ, UK. j.w.murray@imperial.ac.uk
Abstract:
Photosystem II is the oxygen-evolving enzyme of photosynthesis. It is a membrane-bound protein-pigment complex. The oxygen is produced at the oxygen-evolving centre (OEC), a Mn(4)CaO(5) metallocluster, which is largely ligated by amino acids of the D1 protein. The OEC-ligating residues are invariant between most cyanobacteria and higher plants. In this study, a new class of cyanobacterial D1 proteins has been identified in which the OEC metal-ligating residues are very different to the consensus. This new class of 'rogue' D1 proteins is associated with diazotrophic cyanobacteria. Their function, activity and origins are discussed.
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