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== | ==The solution structure of the monomeric species of the C terminal domain of the CA protein of HIV-1== | ||
The protein CA forms the mature capsid of human immunodeficiency virus. | <StructureSection load='2jo0' size='340' side='right'caption='[[2jo0]]' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2jo0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JO0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2JO0 FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=2jo0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jo0 OCA], [https://pdbe.org/2jo0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2jo0 RCSB], [https://www.ebi.ac.uk/pdbsum/2jo0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2jo0 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/Q699E2_9HIV1 Q699E2_9HIV1] | |||
== 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/jo/2jo0_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/main_output.php?pdb_ID=2jo0 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The protein CA forms the mature capsid of human immunodeficiency virus. Hexamerization of the N-terminal domain and dimerization of the C-terminal domain, CAC, occur during capsid assembly, and both domains constitute potential targets for anti-HIV inhibitors. CAC homodimerization occurs mainly through its second helix, and is abolished when its sole tryptophan is mutated to alanine. Previous thermodynamic data obtained with the dimeric and monomeric forms of CAC indicate that the structure of the mutant resembles that of a monomeric intermediate found in the folding and association reactions of CAC. We have solved the three-dimensional structure in aqueous solution of the monomeric mutant. The structure is similar to that of the subunits in the dimeric, nonmutated CAC, except the segment corresponding to the second helix, which is highly dynamic. At the end of this region, the polypeptide chain is bent to bury several hydrophobic residues and, as a consequence, the last two helices are rotated 90 degrees when compared to their position in dimeric CAC. The previously obtained thermodynamic data are consistent with the determined structure of the monomeric mutant. This extraordinary ability of CAC to change its structure may contribute to the different modes of association of CA during HIV assembly, and should be taken into account in the design of new drugs against this virus. | |||
Flexibility in HIV-1 assembly subunits: solution structure of the monomeric C-terminal domain of the capsid protein.,Alcaraz LA, del Alamo M, Barrera FN, Mateu MG, Neira JL Biophys J. 2007 Aug 15;93(4):1264-76. Epub 2007 May 25. PMID:17526561<ref>PMID:17526561</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
[[ | <div class="pdbe-citations 2jo0" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[Virus coat proteins 3D structures|Virus coat proteins 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Human immunodeficiency virus 1]] | [[Category: Human immunodeficiency virus 1]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Alcaraz LA]] | |||
[[Category: Alcaraz | [[Category: Barrera FN]] | ||
[[Category: Barrera | [[Category: Mateu MG]] | ||
[[Category: Mateu | [[Category: Neira JL]] | ||
[[Category: Neira | [[Category: Del Alamo M]] | ||
[[Category: | |||
Latest revision as of 13:08, 20 December 2023
The solution structure of the monomeric species of the C terminal domain of the CA protein of HIV-1The solution structure of the monomeric species of the C terminal domain of the CA protein of HIV-1
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe protein CA forms the mature capsid of human immunodeficiency virus. Hexamerization of the N-terminal domain and dimerization of the C-terminal domain, CAC, occur during capsid assembly, and both domains constitute potential targets for anti-HIV inhibitors. CAC homodimerization occurs mainly through its second helix, and is abolished when its sole tryptophan is mutated to alanine. Previous thermodynamic data obtained with the dimeric and monomeric forms of CAC indicate that the structure of the mutant resembles that of a monomeric intermediate found in the folding and association reactions of CAC. We have solved the three-dimensional structure in aqueous solution of the monomeric mutant. The structure is similar to that of the subunits in the dimeric, nonmutated CAC, except the segment corresponding to the second helix, which is highly dynamic. At the end of this region, the polypeptide chain is bent to bury several hydrophobic residues and, as a consequence, the last two helices are rotated 90 degrees when compared to their position in dimeric CAC. The previously obtained thermodynamic data are consistent with the determined structure of the monomeric mutant. This extraordinary ability of CAC to change its structure may contribute to the different modes of association of CA during HIV assembly, and should be taken into account in the design of new drugs against this virus. Flexibility in HIV-1 assembly subunits: solution structure of the monomeric C-terminal domain of the capsid protein.,Alcaraz LA, del Alamo M, Barrera FN, Mateu MG, Neira JL Biophys J. 2007 Aug 15;93(4):1264-76. Epub 2007 May 25. PMID:17526561[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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