2f8h: Difference between revisions

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[[Image:2f8h.gif|left|200px]]
{{Seed}}
[[Image:2f8h.png|left|200px]]


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{{STRUCTURE_2f8h|  PDB=2f8h  |  SCENE=  }}  
{{STRUCTURE_2f8h|  PDB=2f8h  |  SCENE=  }}  


'''Structure of acetylcitrulline deacetylase from Xanthomonas campestris in metal-free form'''
===Structure of acetylcitrulline deacetylase from Xanthomonas campestris in metal-free form===




==Overview==
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The structure of a novel acetylcitrulline deacetylase from the plant pathogen Xanthomonas campestris has been solved by multiple-wavelength anomalous dispersion (MAD) using crystals grown from selenomethionine-substituted protein and refined at 1.75 A resolution. The asymmetric unit of the crystal contains one monomer consisting of two domains, a catalytic domain and a dimerization domain. The catalytic domain is able to bind a single Co(II) ion at the active site with no change in conformation. The dimerization domain forms an interface between two monomers related by a crystallographic two-fold symmetry axis. The interface is maintained by hydrophobic interactions between helices and hydrogen bonding between two beta strands that form a continuous beta sheet across the dimer interface. Because the dimers are also related by two-fold crystallographic axes, they pack together across the crystal via the dimerization domain, suggesting that higher order oligomers may form in solution. The polypeptide fold of the monomer is similar to the fold of Pseudomonas sp. carboxypeptidase G2 and Neisseria meningitidis succinyl diaminopimelate desuccinylase. Structural comparison among these enzymes allowed modeling of substrate binding and suggests a possible catalytic mechanism, in which Glu130 functions as a bifunctional general acid-base catalyst and the metal ion polarizes the carbonyl of the acetyl group.
The line below this paragraph, {{ABSTRACT_PUBMED_16750290}}, adds the Publication Abstract to the page
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{{ABSTRACT_PUBMED_16750290}}


==About this Structure==
==About this Structure==
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[[Category: Yu, X.]]
[[Category: Yu, X.]]
[[Category: Alpha/beta]]
[[Category: Alpha/beta]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 03:35:22 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 14:20:42 2008''

Revision as of 11:20, 27 July 2008

File:2f8h.png

Template:STRUCTURE 2f8h

Structure of acetylcitrulline deacetylase from Xanthomonas campestris in metal-free form

Template:ABSTRACT PUBMED 16750290

About this Structure

2F8H is a Single protein structure of sequence from Xanthomonas campestris. Full crystallographic information is available from OCA.

Reference

Structure of a novel N-acetyl-L-citrulline deacetylase from Xanthomonas campestris., Shi D, Yu X, Roth L, Tuchman M, Allewell NM, Biophys Chem. 2007 Mar;126(1-3):86-93. Epub 2006 Jun 5. PMID:16750290

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