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1sip
From Proteopedia
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==ALTERNATIVE NATIVE FLAP CONFORMATION REVEALED BY 2.3 ANGSTROMS RESOLUTION STRUCTURE OF SIV PROTEINASE== | ==ALTERNATIVE NATIVE FLAP CONFORMATION REVEALED BY 2.3 ANGSTROMS RESOLUTION STRUCTURE OF SIV PROTEINASE== | ||
| - | <StructureSection load='1sip' size='340' side='right' caption='[[1sip]], [[Resolution|resolution]] 2.30Å' scene=''> | + | <StructureSection load='1sip' size='340' side='right'caption='[[1sip]], [[Resolution|resolution]] 2.30Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[1sip]] is a 1 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[1sip]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Simian_immunodeficiency_virus Simian immunodeficiency virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SIP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SIP FirstGlance]. <br> |
| - | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3Å</td></tr> |
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1sip FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sip OCA], [https://pdbe.org/1sip PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sip RCSB], [https://www.ebi.ac.uk/pdbsum/1sip PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sip ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/Q88016_SIV Q88016_SIV] | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
| - | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/si/1sip_consurf.spt"</scriptWhenChecked> | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/si/1sip_consurf.spt"</scriptWhenChecked> |
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </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/ | + | </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=1sip ConSurf]. |
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | A large conformational change is observed between HIV-1 proteinase in the ligand-free state and in complexes with transition-state inhibitors. Crystal structures of this enzyme have either the flaps open for the native or ligand-free enzyme or the flaps closed for peptidomimetic ligand-bound enzyme. We describe the structure of native recombinant SIV proteinase which like other retroviral proteinases crystallizes as a perfect 2-fold symmetric dimer but in a different crystal packing arrangement. In contrast to HIV-1 PR we show that SIV proteinase in the ligand-free state adopts the closed flaps conformation, demonstrating that ligand binding is not a prerequisite for the closed flaps conformation. The catalytic water was clearly observed between the two aspartates which were not perfectly co-planar, and in this structure the active site cleft is more restricted than for either inhibitor bound or ligand-free HIV-1 proteinase. Accommodation of two bulkier side-chains in the simian enzyme core has resulted in a more exposed N terminus than for HIV-1 PR which we predict could enhance autocatalytic cleavage at the N terminus. | ||
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| - | Alternative native flap conformation revealed by 2.3 A resolution structure of SIV proteinase.,Wilderspin AF, Sugrue RJ J Mol Biol. 1994 May 27;239(1):97-103. PMID:8196050<ref>PMID:8196050</ref> | ||
| - | + | ==See Also== | |
| - | + | *[[Immunodeficiency virus protease 3D structures|Immunodeficiency virus protease 3D structures]] | |
| - | + | ||
| - | == | + | |
| - | + | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: Wilderspin | + | [[Category: Simian immunodeficiency virus]] |
| + | [[Category: Wilderspin AF]] | ||
Current revision
ALTERNATIVE NATIVE FLAP CONFORMATION REVEALED BY 2.3 ANGSTROMS RESOLUTION STRUCTURE OF SIV PROTEINASE
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