Journal
BIOCHEMISTRY
Volume 49, Issue 35, Pages 7411-7413Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bi1011145
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Funding
- BBSRC [BB/F023308/1, BB/E006388/1]
- EPSRC [EP/F00270X/1]
- BBSRC [BB/F020554/1, BB/F023308/1, BB/E006388/1] Funding Source: UKRI
- EPSRC [EP/F00270X/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/F020554/1, BB/F023308/1, BB/E006388/1] Funding Source: researchfish
- Engineering and Physical Sciences Research Council [EP/F00270X/1] Funding Source: researchfish
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We present here the crystal structure of CyanoP (Tlr2075) from Thermosynechococcus elongatus at 2.8 angstrom. CyanoP is a substoichiometric component of the isolated cyanobacterial Photosystem II (PSII) complex, distantly related to the PsbP extrinsic subunit of the oxygen-evolving P S I I complex in higher plants and green algae. Despite the relatively low degree of sequence similarity, we have found that CyanoP adopts the same beta-sandwich fold as higher-plant PsbP and contains a well-conserved metal (zinc)binding site that is also present in plant PsbP. Our results support the idea that CyanoP represents the basal structural fold of the PsbP superfamily.
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