1upa
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(New page: 200px<br /> <applet load="1upa" size="450" color="white" frame="true" align="right" spinBox="true" caption="1upa, resolution 2.35Å" /> '''CARBOXYETHYLARGININ...)
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Revision as of 18:24, 29 October 2007
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CARBOXYETHYLARGININE SYNTHASE FROM STREPTOMYCES CLAVULIGERUS (SEMET STRUCTURE)
Overview
The initial step in the biosynthesis of the clinically important, beta-lactamase inhibitor clavulanic acid involves condensation of two, primary metabolites, D-glyceraldehyde 3-phosphate and L-arginine, to give, N2-(2-carboxyethyl)arginine, a beta-amino acid. This unusual N-C bond, forming reaction is catalyzed by the thiamin diphosphate (ThP2)-dependent, enzyme N2-(2-carboxyethyl)arginine synthase. Here we report the crystal, structure of N2-(2-carboxyethyl)arginine synthase, complexed with ThP2 and, Mg2+, to 2.35-A resolution. The structure was solved in two space groups, P2(1)2(1)2(1) and P2(1)2(1)2. In both, the enzyme is observed in a, tetrameric form, composed of a dimer of two more tightly associated, dimers, consistent with both mass spectrometric and gel filtration, ... [(full description)]
About this Structure
1UPA is a [Single protein] structure of sequence from [Streptomyces clavuligerus] with MG, SO4 and TPP as [ligands]. Full crystallographic information is available from [OCA].
Reference
Crystal structure and mechanistic implications of N2-(2-carboxyethyl)arginine synthase, the first enzyme in the clavulanic acid biosynthesis pathway., Caines ME, Elkins JM, Hewitson KS, Schofield CJ, J Biol Chem. 2004 Feb 13;279(7):5685-92. Epub 2003 Nov 17. PMID:14623876
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