1v2b
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Crystal Structure of PsbP Protein in the Oxygen-Evolving Complex of Photosystem II from Higher Plants
OverviewOverview
PsbP is a membrane-extrinsic subunit of the water-oxidizing complex, photosystem II (PS II). The evolutionary origin of PsbP has long been a, mystery because it specifically exists in higher plants and green algae, but not in cyanobacteria. We report here the crystal structure of PsbP, from Nicotiana tabacum at a resolution of 1.6 A. Its structure is mainly, composed of beta-sheet, and is not similar to any structures in, cyanobacterial PS II. However, the electrostatic surface potential of PsbP, is similar to that of cyanobacterial PsbV (cyt c(550)), which has a, function similar to PsbP. A structural homology search with the DALI, algorithm indicated that the folding of PsbP is very similar to that of, Mog1p, a regulatory protein for the nuclear transport of Ran GTPase. The, structure of PsbP provides insight into its novel function in, GTP-regulated metabolism in PS II.
About this StructureAbout this Structure
1V2B is a Single protein structure of sequence from Nicotiana tabacum with GLC and SO4 as ligands. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of the PsbP protein of photosystem II from Nicotiana tabacum., Ifuku K, Nakatsu T, Kato H, Sato F, EMBO Rep. 2004 Apr;5(4):362-7. Epub 2004 Mar 12. PMID:15031714
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