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1cvl

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{{STRUCTURE_1cvl| PDB=1cvl | SCENE= }}
{{STRUCTURE_1cvl| PDB=1cvl | SCENE= }}
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'''CRYSTAL STRUCTURE OF BACTERIAL LIPASE FROM CHROMOBACTERIUM VISCOSUM ATCC 6918'''
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===CRYSTAL STRUCTURE OF BACTERIAL LIPASE FROM CHROMOBACTERIUM VISCOSUM ATCC 6918===
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==Overview==
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The crystal structure of a lipase from the bacterium Chromobacterium viscosum ATCC 6918 (CVL) has been determined by isomorphous replacement and refined at 1.6 angstroms resolution to an R-factor of 17.8%. The lipase has the overall topology of an alpha/beta type protein, which was also found for previously determined lipase structures. The catalytic triad of the active center consists of the residues Ser87, Asp263 and His285. These residues are not exposed to the solvent, but a narrow channel connects them with the molecular surface. This conformation is very similar to the previously reported closed conformation of Pseudomonas glumae lipase (PGL), but superposition of the two lipase structures reveals several conformational differences. r.m.s. deviations greater than 2 angstroms are found for the C alpha-atoms of the polypeptide chains from His15 to Asp28, from Leu49 to Ser54 and from Lys128 to Gln158. Compared to the PGL structure in the CVL structure, three alpha-helical fragments are shorter, one beta-strand is longer and an additional antiparallel beta-sheet is found. In contrast to PGL, CVL displays an oxyanion hole, which is stabilized by the amide nitrogen atoms of Leu17 and Gln88, and a cis-peptide bond between Gln291 and Leu292. CVL contains a Ca2+, like the PGL, which is coordinated by four oxygen atoms from the protein and two water molecules.
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==About this Structure==
==About this Structure==
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[[Category: Triacylglycerol-hydrolase]]
[[Category: Triacylglycerol-hydrolase]]
[[Category: X-ray crystallography]]
[[Category: X-ray crystallography]]
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Revision as of 18:30, 30 June 2008

Image:1cvl.png

Template:STRUCTURE 1cvl

CRYSTAL STRUCTURE OF BACTERIAL LIPASE FROM CHROMOBACTERIUM VISCOSUM ATCC 6918

Template:ABSTRACT PUBMED 8683577

About this Structure

1CVL is a Single protein structure of sequence from Chromobacterium viscosum. Full crystallographic information is available from OCA.

Reference

Crystal structure of a bacterial lipase from Chromobacterium viscosum ATCC 6918 refined at 1.6 angstroms resolution., Lang D, Hofmann B, Haalck L, Hecht HJ, Spener F, Schmid RD, Schomburg D, J Mol Biol. 1996 Jun 21;259(4):704-17. PMID:8683577

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