1i5o
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(New page: 200px<br /><applet load="1i5o" size="450" color="white" frame="true" align="right" spinBox="true" caption="1i5o, resolution 2.8Å" /> '''CRYSTAL STRUCTURE OF ...)
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Revision as of 14:57, 20 November 2007
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CRYSTAL STRUCTURE OF MUTANT R105A OF E. COLI ASPARTATE TRANSCARBAMOYLASE
Overview
Regulation of protein function, often achieved by allosteric mechanisms, is central to normal physiology and cellular processes. Although numerous, models have been proposed to account for the cooperative binding of, ligands to allosteric proteins and enzymes, direct structural support has, been lacking. Here, we used a combination of X-ray crystallography and, small angle X-ray scattering in solution to provide direct structural, evidence that the binding of ligand to just one of the six active sites of, Escherichia coli aspartate transcarbamoylase induces a concerted, structural transition from the T to the R state.
About this Structure
1I5O is a Protein complex structure of sequences from Escherichia coli with ZN and PAL as ligands. Active as Aspartate carbamoyltransferase, with EC number 2.1.3.2 Full crystallographic information is available from OCA.
Reference
Direct structural evidence for a concerted allosteric transition in Escherichia coli aspartate transcarbamoylase., Macol CP, Tsuruta H, Stec B, Kantrowitz ER, Nat Struct Biol. 2001 May;8(5):423-6. PMID:11323717
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