3b7v: Difference between revisions
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[[Image: | ==HIV-1 protease complexed with gem-diol-amine tetrahedral intermediate NLLTQI== | ||
<StructureSection load='3b7v' size='340' side='right' caption='[[3b7v]], [[Resolution|resolution]] 1.46Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3b7v]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Human_immunodeficiency_virus_type_1_bh10 Human immunodeficiency virus type 1 bh10]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3B7V OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3B7V FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene><br> | |||
<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=LNT:N-[(2S)-2-AMINO-1,1-DIHYDROXY-4-METHYLPENTYL]-L-THREONINE'>LNT</scene></td></tr> | |||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3b80|3b80]]</td></tr> | |||
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">gag-pol ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=11678 Human immunodeficiency virus type 1 BH10])</td></tr> | |||
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/HIV-1_retropepsin HIV-1 retropepsin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.23.16 3.4.23.16] </span></td></tr> | |||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3b7v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3b7v OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3b7v RCSB], [http://www.ebi.ac.uk/pdbsum/3b7v PDBsum]</span></td></tr> | |||
<table> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b7/3b7v_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
HIV-1 protease (PR) is the target for several important antiviral drugs used in AIDS therapy. The drugs bind inside the active site cavity of PR where normally the viral polyprotein substrate is bound and hydrolyzed. We report two high-resolution crystal structures of wild-type PR (PRWT) and the multi-drug-resistant variant with the I54V mutation (PRI54V) in complex with a peptide at 1.46 and 1.50 A resolution, respectively. The peptide forms a gem-diol tetrahedral reaction intermediate (TI) in the crystal structures. Distinctive interactions are observed for the TI binding in the active site cavity of PRWT and PRI54V. The mutant PRI54V/TI complex has lost water-mediated hydrogen bond interactions with the amides of Ile50 and Ile50' in the flap. Hence, the structures provide insight into the mechanism of drug resistance arising from this mutation. The structures also illustrate an intermediate state in the hydrolysis reaction. One of the gem-diol hydroxide groups in the PRWT complex forms a very short (2.3 A) hydrogen bond with the outer carboxylate oxygen of Asp25. Quantum chemical calculations based on this TI structure are consistent with protonation of the inner carboxylate oxygen of Asp25', in contrast to several theoretical studies. These TI complexes and quantum calculations are discussed in relation to the chemical mechanism of the peptide bond hydrolysis catalyzed by PR. | |||
Caught in the Act: the 1.5 A resolution crystal structures of the HIV-1 protease and the I54V mutant reveal a tetrahedral reaction intermediate.,Kovalevsky AY, Chumanevich AA, Liu F, Louis JM, Weber IT Biochemistry. 2007 Dec 25;46(51):14854-64. Epub 2007 Dec 4. PMID:18052235<ref>PMID:18052235</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[Virus protease|Virus protease]] | *[[Virus protease|Virus protease]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: HIV-1 retropepsin]] | [[Category: HIV-1 retropepsin]] | ||
[[Category: Human immunodeficiency virus type 1 bh10]] | [[Category: Human immunodeficiency virus type 1 bh10]] | ||
Revision as of 11:33, 29 September 2014
HIV-1 protease complexed with gem-diol-amine tetrahedral intermediate NLLTQIHIV-1 protease complexed with gem-diol-amine tetrahedral intermediate NLLTQI
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedHIV-1 protease (PR) is the target for several important antiviral drugs used in AIDS therapy. The drugs bind inside the active site cavity of PR where normally the viral polyprotein substrate is bound and hydrolyzed. We report two high-resolution crystal structures of wild-type PR (PRWT) and the multi-drug-resistant variant with the I54V mutation (PRI54V) in complex with a peptide at 1.46 and 1.50 A resolution, respectively. The peptide forms a gem-diol tetrahedral reaction intermediate (TI) in the crystal structures. Distinctive interactions are observed for the TI binding in the active site cavity of PRWT and PRI54V. The mutant PRI54V/TI complex has lost water-mediated hydrogen bond interactions with the amides of Ile50 and Ile50' in the flap. Hence, the structures provide insight into the mechanism of drug resistance arising from this mutation. The structures also illustrate an intermediate state in the hydrolysis reaction. One of the gem-diol hydroxide groups in the PRWT complex forms a very short (2.3 A) hydrogen bond with the outer carboxylate oxygen of Asp25. Quantum chemical calculations based on this TI structure are consistent with protonation of the inner carboxylate oxygen of Asp25', in contrast to several theoretical studies. These TI complexes and quantum calculations are discussed in relation to the chemical mechanism of the peptide bond hydrolysis catalyzed by PR. Caught in the Act: the 1.5 A resolution crystal structures of the HIV-1 protease and the I54V mutant reveal a tetrahedral reaction intermediate.,Kovalevsky AY, Chumanevich AA, Liu F, Louis JM, Weber IT Biochemistry. 2007 Dec 25;46(51):14854-64. Epub 2007 Dec 4. PMID:18052235[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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