Identification of a calcium-binding site in the PsbO protein of photosystem II.
Analysis of the anomalous X-diffraction data reported by Ferreira et al. (PDB entry 1S5L) for crystals of photosystem II isolated from Thermosynechococcus elongatus indicates that a calcium ion is bound to the PsbO protein. The Ca2+-binding site is located close to the lumenal exit of a putative proton channel leading from the water splitting site.
Wolfson Laboratories, Division of Molecular Biosciences, Faculty of Life Sciences, South Kensington Campus, Imperial College, London SW7 2AZ, UK.
James W
JW
Murray
James
J
Barber
D001665:Binding Sites; D002118:Calcium / Q000378:metabolism*; D000458:Cyanobacteria / Q000737:chemistry; D008667:Metalloproteins / Q000737:chemistry*; D045332:Photosystem II Protein Complex / Q000737:chemistry*; D014961:X-Ray Diffraction
D008667:Metalloproteins; D045332:Photosystem II Protein Complex; D002118:Calcium