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2hb2

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[[Image:2hb2.gif|left|200px]]
 
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{{Structure
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==Structure of HIV protease 6X mutant in apo form==
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|PDB= 2hb2 |SIZE=350|CAPTION= <scene name='initialview01'>2hb2</scene>, resolution 2.300&Aring;
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<StructureSection load='2hb2' size='340' side='right'caption='[[2hb2]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND=
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<table><tr><td colspan='2'>[[2hb2]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HB2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HB2 FirstGlance]. <br>
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|ACTIVITY= <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>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
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|GENE= gal-pol ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=11676 Human immunodeficiency virus 1])
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2hb2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hb2 OCA], [https://pdbe.org/2hb2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hb2 RCSB], [https://www.ebi.ac.uk/pdbsum/2hb2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hb2 ProSAT]</span></td></tr>
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|DOMAIN=
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</table>
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|RELATEDENTRY=[[2azc|2AZC]]
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== Function ==
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2hb2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hb2 OCA], [http://www.ebi.ac.uk/pdbsum/2hb2 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2hb2 RCSB]</span>
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[https://www.uniprot.org/uniprot/Q9E3M8_9HIV1 Q9E3M8_9HIV1]
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}}
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hb/2hb2_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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/main_output.php?pdb_ID=2hb2 ConSurf].
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<div style="clear:both"></div>
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'''Structure of HIV protease 6X mutant in apo form'''
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==See Also==
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*[[Immunodeficiency virus protease 3D structures|Immunodeficiency virus protease 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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The crystal structures of wild-type HIV protease (HIV PR) in the absence of substrate or inhibitor in two related crystal forms at 1.4 and 2.15 A resolution are reported. In one crystal form HIV PR adopts an 'open' conformation with a 7.7 A separation between the tips of the flaps in the homodimer. In the other crystal form the tips of the flaps are 'curled' towards the 80s loop, forming contacts across the local twofold axis. The 2.3 A resolution crystal structure of a sixfold mutant of HIV PR in the absence of substrate or inhibitor is also reported. The mutant HIV PR, which evolved in response to treatment with the potent inhibitor TL-3, contains six point mutations relative to the wild-type enzyme (L24I, M46I, F53L, L63P, V77I, V82A). In this structure the flaps also adopt a 'curled' conformation, but are separated and not in contact. Comparison of the apo structures to those with TL-3 bound demonstrates the extent of conformational change induced by inhibitor binding, which includes reorganization of the packing between twofold-related flaps. Further comparison with six other apo HIV PR structures reveals that the 'open' and 'curled' conformations define two distinct families in HIV PR. These conformational states include hinge motion of residues at either end of the flaps, opening and closing the entire beta-loop, and translational motion of the flap normal to the dimer twofold axis and relative to the 80s loop. The alternate conformations also entail changes in the beta-turn at the tip of the flap. These observations provide insight into the plasticity of the flap domains, the nature of their motions and their critical role in binding substrates and inhibitors.
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==About this Structure==
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2HB2 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HB2 OCA].
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==Reference==
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Conformational flexibility in the flap domains of ligand-free HIV protease., Heaslet H, Rosenfeld R, Giffin M, Lin YC, Tam K, Torbett BE, Elder JH, McRee DE, Stout CD, Acta Crystallogr D Biol Crystallogr. 2007 Aug;63(Pt 8):866-75. Epub 2007, Jul 17. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17642513 17642513]
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[[Category: HIV-1 retropepsin]]
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[[Category: Human immunodeficiency virus 1]]
[[Category: Human immunodeficiency virus 1]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Elder, J H.]]
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[[Category: Elder JH]]
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[[Category: Heaslet, H.]]
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[[Category: Heaslet H]]
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[[Category: Stout, C D.]]
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[[Category: Stout CD]]
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[[Category: Tam, K.]]
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[[Category: Tam K]]
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[[Category: aspartyl]]
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[[Category: hiv]]
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[[Category: protease]]
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[[Category: retrovirus]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 03:27:55 2008''
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Current revision

Structure of HIV protease 6X mutant in apo form

PDB ID 2hb2

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OCA

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