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2nx9

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{{STRUCTURE_2nx9| PDB=2nx9 | SCENE= }}
{{STRUCTURE_2nx9| PDB=2nx9 | SCENE= }}
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'''Crystal structure of the carboxyltransferase domain of the oxaloacetate decarboxylase Na+ pump from Vibrio cholerae'''
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===Crystal structure of the carboxyltransferase domain of the oxaloacetate decarboxylase Na+ pump from Vibrio cholerae===
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==Overview==
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Oxaloacetate decarboxylase is a membrane-bound multiprotein complex that couples oxaloacetate decarboxylation to sodium ion transport across the membrane. The initial reaction catalyzed by this enzyme machinery is the carboxyl transfer from oxaloacetate to the prosthetic biotin group. The crystal structure of the carboxyltransferase at 1.7 A resolution shows a dimer of alpha(8)beta(8) barrels with an active site metal ion, identified spectroscopically as Zn(2+), at the bottom of a deep cleft. The enzyme is completely inactivated by specific mutagenesis of Asp17, His207 and His209, which serve as ligands for the Zn(2+) metal ion, or by Lys178 near the active site, suggesting that Zn(2+) as well as Lys178 are essential for the catalysis. In the present structure this lysine residue is hydrogen-bonded to Cys148. A potential role of Lys178 as initial acceptor of the carboxyl group from oxaloacetate is discussed.
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==About this Structure==
==About this Structure==
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[[Category: Tim-barrel fold]]
[[Category: Tim-barrel fold]]
[[Category: Zn2+ binding site]]
[[Category: Zn2+ binding site]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 10:01:44 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 11:19:32 2008''

Revision as of 08:19, 29 July 2008

Image:2nx9.png

Template:STRUCTURE 2nx9

Crystal structure of the carboxyltransferase domain of the oxaloacetate decarboxylase Na+ pump from Vibrio cholerae

Template:ABSTRACT PUBMED 17270211

About this Structure

2NX9 is a Single protein structure of sequence from Vibrio cholerae. Full crystallographic information is available from OCA.

Reference

Crystal structure of the carboxyltransferase domain of the oxaloacetate decarboxylase Na+ pump from Vibrio cholerae., Studer R, Dahinden P, Wang WW, Auchli Y, Li XD, Dimroth P, J Mol Biol. 2007 Mar 23;367(2):547-57. Epub 2006 Dec 19. PMID:17270211

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