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2i4u

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{{STRUCTURE_2i4u| PDB=2i4u | SCENE= }}
{{STRUCTURE_2i4u| PDB=2i4u | SCENE= }}
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'''HIV-1 protease with TMC-126'''
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===HIV-1 protease with TMC-126===
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==Overview==
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The introduction of human immunodeficiency virus type 1 (HIV-1) protease inhibitors (PIs) markedly improved the clinical outcome and control of HIV-1 infection. However, cross-resistance among PIs due to a wide spectrum of mutations in viral protease is a major factor limiting their broader clinical use. Here we report on the suppression of PI resistance using a covalent attachment of a phosphonic acid motif to a peptidomimetic inhibitor scaffold. The resulting phosphonate analogs maintain high binding affinity to HIV-1 protease, potent antiretroviral activity, and unlike the parent molecules, display no loss of potency against a panel of clinically important PI-resistant HIV-1 strains. As shown by crystallographic analysis, the phosphonate moiety is highly exposed to solvent with no discernable interactions with any of the enzyme active site or surface residues. We term this effect "solvent anchoring" and demonstrate that it is driven by a favorable change in the inhibitor binding entropy upon the interaction with mutant enzymes. This type of thermodynamic behavior, which was not found with the parent scaffold fully buried in the enzyme active site, is a result of the increased degeneracy of inhibitor binding states, allowing effective molecular adaptation to the expanded cavity volume of mutant proteases. This strategy, which is applicable to various PI scaffolds, should facilitate the design of novel PIs and potentially other antiviral therapeutics.
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{{ABSTRACT_PUBMED_16979654}}
==About this Structure==
==About this Structure==
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[[Category: Hydrolase]]
[[Category: Hydrolase]]
[[Category: Protein inhibitor complex]]
[[Category: Protein inhibitor complex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 07:04:18 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 20:57:08 2008''

Revision as of 17:57, 27 July 2008

Image:2i4u.png

Template:STRUCTURE 2i4u

HIV-1 protease with TMC-126

Template:ABSTRACT PUBMED 16979654

About this Structure

2I4U is a Single protein structure of sequence from Human immunodeficiency virus 1. Full crystallographic information is available from OCA.

Reference

Suppression of HIV-1 protease inhibitor resistance by phosphonate-mediated solvent anchoring., Cihlar T, He GX, Liu X, Chen JM, Hatada M, Swaminathan S, McDermott MJ, Yang ZY, Mulato AS, Chen X, Leavitt SA, Stray KM, Lee WA, J Mol Biol. 2006 Oct 27;363(3):635-47. Epub 2006 Aug 2. PMID:16979654

Page seeded by OCA on Sun Jul 27 20:57:08 2008

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