1m9w

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[[Image:1m9w.gif|left|200px]]
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{{Seed}}
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[[Image:1m9w.png|left|200px]]
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{{STRUCTURE_1m9w| PDB=1m9w | SCENE= }}
{{STRUCTURE_1m9w| PDB=1m9w | SCENE= }}
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'''Study of electrostatic potential surface distribution using high resolution side-chain conformation determined by NMR'''
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===Study of electrostatic potential surface distribution using high resolution side-chain conformation determined by NMR===
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==Overview==
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Plastocyanin is a small (approximately 10 kDa), type I blue copper protein that works as an electron donor to photosystem I from cytochrome f in both chloroplast systems and in some strains of cyanobacteria. Comparative studies of the kinetic mechanisms of plastocyanins in different organisms show that the electron transfer from photosystem I happens by simple collision in cyanobacteria but through a intermediate transition complex in green algae and superior plants. Previous work has proved that this effect cannot be explained by structural variations across the different plastocyanins but it can be explained by differences in the electrostatic potential distribution at the protein surface. In that case, minor conformational errors at the amino acid side chain level may imply an important effect in the electrostatic potential distribution calculation. In this work we present a high resolution study of side chain conformation by homonuclear NMR for the reduced wild-type plastocyanin Synechocystis using intensity ratios for 2D-NOESY and 2D-H,H-TOCSY cross peaks at different mixing times. We also present the corresponding comparison with different plastocyanin structures and the effect in the electrostatic potential distribution at the protein surface. We discuss the importance of indirect J-coupling information from TOCSY-type experiments as complement for intraresidue distances derived from NOESY experiments in the determination of side chain orientation and stereo-specific assignments.
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The line below this paragraph, {{ABSTRACT_PUBMED_14517909}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 14517909 is the PubMed ID number.
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{{ABSTRACT_PUBMED_14517909}}
==About this Structure==
==About this Structure==
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1M9W is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Synechocystis_sp. Synechocystis sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M9W OCA].
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1M9W is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Synechocystis_sp. Synechocystis sp.]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M9W OCA].
==Reference==
==Reference==
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[[Category: Congen]]
[[Category: Congen]]
[[Category: Sidechain orientation]]
[[Category: Sidechain orientation]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:48:21 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 23:31:22 2008''

Revision as of 20:31, 2 July 2008

Image:1m9w.png

Template:STRUCTURE 1m9w

Study of electrostatic potential surface distribution using high resolution side-chain conformation determined by NMR

Template:ABSTRACT PUBMED 14517909

About this Structure

1M9W is a Single protein structure of sequence from Synechocystis sp.. Full experimental information is available from OCA.

Reference

Study of electrostatic potential surface distribution of wild-type plastocyanin Synechocystis solution structure determined by homonuclear NMR., Monleon D, Celda B, Biopolymers. 2003 Oct;70(2):212-20. PMID:14517909

Page seeded by OCA on Wed Jul 2 23:31:22 2008

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