Journal
BIOCHEMISTRY
Volume 49, Issue 13, Pages 2765-2767Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bi100217h
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- Otago University [08-UOO-043]
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In Synechocystis sp. PCC 6803, PsbQ is associated with photosystem II (PSII) complexes with the highest activity and stability. However, this subunit is not found in PSI I X-ray crystallographic structures from Thermosynechococcus elongatus or Thermosynechococcus vulcanus. We present the crystal structure of cyanobacterial PsbQ determined in the presence and absence of Zn2+. The protein has a well-defined helical core, containing four helices arranged in an up down up down fold. A conserved potential interaction site composed of a divalent metal binding site and adjacent hydrophobic pocket has been identified.
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