1nze

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{{STRUCTURE_1nze| PDB=1nze | SCENE= }}
{{STRUCTURE_1nze| PDB=1nze | SCENE= }}
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'''Crystal structure of PsbQ polypeptide of photosystem II from higher plants'''
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===Crystal structure of PsbQ polypeptide of photosystem II from higher plants===
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==Overview==
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The smallest extrinsic polypeptide of the water-oxidizing complex (PsbQ) was extracted and purified from spinach (Spinacia oleracea) photosystem II (PSII) membranes. It was then crystallized in the presence of Zn(2+) and its structure was determined by X-ray diffraction at 1.95-A resolution using the multi-wavelength anomalous diffraction method, with the zinc as the anomalous scatterer. The crystal structure shows that the core of the protein is a four-helix bundle, whereas the amino-terminal portion, which possibly interacts with the photosystem core, is not visible in the crystal. The distribution of positive and negative charges on the protein surface might explain the ability of PsbQ to increase the binding of Cl(-) and Ca(2+) and make them available to PSII.
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(as it appears on PubMed at http://www.pubmed.gov), where 12949587 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12949587}}
==About this Structure==
==About this Structure==
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[[Category: Psbq]]
[[Category: Psbq]]
[[Category: Water oxidizing complex]]
[[Category: Water oxidizing complex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 03:10:31 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 07:20:06 2008''

Revision as of 04:20, 28 July 2008

Image:1nze.png

Template:STRUCTURE 1nze

Crystal structure of PsbQ polypeptide of photosystem II from higher plants

Template:ABSTRACT PUBMED 12949587

About this Structure

1NZE is a Single protein structure of sequence from Spinacia oleracea. Full crystallographic information is available from OCA.

Reference

Crystal structure of the PsbQ protein of photosystem II from higher plants., Calderone V, Trabucco M, Vujicic A, Battistutta R, Giacometti GM, Andreucci F, Barbato R, Zanotti G, EMBO Rep. 2003 Sep;4(9):900-5. PMID:12949587

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