View source for 8eet


==T=1 particle HIV-1 CA M66A==
<StructureSection load='8eet' size='340' side='right'caption='[[8eet]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8eet]] 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=8EET OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8EET FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IHP:INOSITOL+HEXAKISPHOSPHATE'>IHP</scene></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=8eet FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8eet OCA], [https://pdbe.org/8eet PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8eet RCSB], [https://www.ebi.ac.uk/pdbsum/8eet PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8eet ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GAG_HV1N5 GAG_HV1N5] Matrix protein p17 targets Gag and Gag-Pol polyproteins to the plasma membrane via a multipartite membrane binding signal, that includes its myristoylated N-terminus. Also mediates nuclear localization of the preintegration complex. Implicated in the release from host cell mediated by Vpu.  Capsid protein p24 forms the conical core of the virus that encapsulates the genomic RNA-nucleocapsid complex.  Nucleocapsid protein p7 encapsulates and protects viral dimeric unspliced (genomic) RNA. Binds these RNAs through its zinc fingers.  p6-gag plays a role in budding of the assembled particle by interacting with the host class E VPS proteins TSG101 and PDCD6IP/AIP1 (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The HIV-1 capsid is a fullerene cone made of quasi-equivalent hexamers and pentamers of the viral CA protein. Typically, quasi-equivalent assembly of viral capsid subunits is controlled by a molecular switch. Here, we identify a Thr-Val-Gly-Gly motif that modulates CA hexamer/pentamer switching by folding into a 3(10) helix in the pentamer and random coil in the hexamer. Manipulating the coil/helix configuration of the motif allowed us to control pentamer and hexamer formation in a predictable manner, thus proving its function as a molecular switch. Importantly, the switch also remodels the common binding site for host factors that are critical for viral replication and the new ultra-potent HIV-1 inhibitor lenacapavir. This study reveals that a critical assembly element also modulates the post-assembly and viral replication functions of the HIV-1 capsid and provides new insights on capsid function and inhibition.

A molecular switch modulates assembly and host factor binding of the HIV-1 capsid.,Schirra RT, Dos Santos NFB, Zadrozny KK, Kucharska I, Ganser-Pornillos BK, Pornillos O Nat Struct Mol Biol. 2023 Mar;30(3):383-390. doi: 10.1038/s41594-022-00913-5. , Epub 2023 Feb 9. PMID:36759579<ref>PMID:36759579</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 8eet" style="background-color:#fffaf0;"></div>

==See Also==
*[[Gag polyprotein 3D structures|Gag polyprotein 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Human immunodeficiency virus 1]]
[[Category: Large Structures]]
[[Category: Ganser-Pornillos BK]]
[[Category: Pornillos O]]
[[Category: Schirra RT]]