Structure of CyanoP at 2.8 Å: implications for the evolution and function of the PsbP subunit of photosystem II
We present here the crystal structure of CyanoP (Tlr2075) from Thermosynechococcus
elongatus at 2.8 Å. CyanoP is a substoichiometric component of the isolated cyanobacterial
Photosystem II (PSII) complex, distantly related to the PsbP extrinsic subunit of the oxygen-
evolving PSII complex in higher plants and green algae. Despite the relatively low degree of
sequence similarity, we have found that CyanoP adopts the same β-sandwich fold as higher-
plant PsbP and contains a well-conserved metal (zinc)-binding site that is also present in …
elongatus at 2.8 Å. CyanoP is a substoichiometric component of the isolated cyanobacterial
Photosystem II (PSII) complex, distantly related to the PsbP extrinsic subunit of the oxygen-
evolving PSII complex in higher plants and green algae. Despite the relatively low degree of
sequence similarity, we have found that CyanoP adopts the same β-sandwich fold as higher-
plant PsbP and contains a well-conserved metal (zinc)-binding site that is also present in …
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