1pzo

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[[Image:1pzo.gif|left|200px]]
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{{Seed}}
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[[Image:1pzo.png|left|200px]]
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{{STRUCTURE_1pzo| PDB=1pzo | SCENE= }}
{{STRUCTURE_1pzo| PDB=1pzo | SCENE= }}
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'''TEM-1 Beta-Lactamase in Complex with a Novel, Core-Disrupting, Allosteric Inhibitor'''
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===TEM-1 Beta-Lactamase in Complex with a Novel, Core-Disrupting, Allosteric Inhibitor===
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==Overview==
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Although inhibitors typically bind pre-formed sites on proteins, it is theoretically possible to inhibit by disrupting the folded structure of a protein or, in the limit, to bind preferentially to the unfolded state. Equilibria defining how such molecules act are well understood, but structural models for such binding are unknown. Two novel inhibitors of beta-lactamase were found to destabilize the enzyme at high temperatures, but at lower temperatures showed no preference for destabilized mutant enzymes versus stabilized mutants. X-ray crystal structures showed that both inhibitors bound to a cryptic site in beta-lactamase, which the inhibitors themselves created by forcing apart helixes 11 and 12. This opened up a portion of the hydrophobic core of the protein, into which these two inhibitors bind. Although this binding site is 16 A from the center of the active site, the conformational changes were transmitted through a sequence of linked motions to a key catalytic residue, Arg244, which in the complex adopts conformations very different from those in catalytically competent enzyme conformations. These structures offer a detailed view of what has heretofore been a theoretical construct, and suggest the possibility for further design against this novel site.
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The line below this paragraph, {{ABSTRACT_PUBMED_15037085}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 15037085 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15037085}}
==About this Structure==
==About this Structure==
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[[Category: Crystal structure]]
[[Category: Crystal structure]]
[[Category: Novel allosteric inhibitor]]
[[Category: Novel allosteric inhibitor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 05:41:17 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 03:02:49 2008''

Revision as of 00:02, 28 July 2008

Image:1pzo.png

Template:STRUCTURE 1pzo

TEM-1 Beta-Lactamase in Complex with a Novel, Core-Disrupting, Allosteric Inhibitor

Template:ABSTRACT PUBMED 15037085

About this Structure

1PZO is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Allosteric inhibition through core disruption., Horn JR, Shoichet BK, J Mol Biol. 2004 Mar 5;336(5):1283-91. PMID:15037085

Page seeded by OCA on Mon Jul 28 03:02:49 2008

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