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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[8fzc]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_type_2_(ISOLATE_ROD) Human immunodeficiency virus type 2 (ISOLATE ROD)]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8FZC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8FZC FirstGlance]. <br>
<table><tr><td colspan='2'>[[8fzc]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_type_2_(ISOLATE_ROD) Human immunodeficiency virus type 2 (ISOLATE ROD)]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8FZC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8FZC FirstGlance]. <br>
</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=8fzc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8fzc OCA], [https://pdbe.org/8fzc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8fzc RCSB], [https://www.ebi.ac.uk/pdbsum/8fzc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8fzc ProSAT]</span></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 5.5&#8491;</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=8fzc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8fzc OCA], [https://pdbe.org/8fzc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8fzc RCSB], [https://www.ebi.ac.uk/pdbsum/8fzc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8fzc ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/GAG_HV2RO GAG_HV2RO] Matrix protein p17 targets Gag and Gag-pol polyproteins to the plasma membrane via a multipartite membrane binding signal. Also mediates nuclear localization of the preintegration complex (By similarity).  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 (By similarity).  p6-gag plays a role in budding of the assembled particle by interacting with the host class E VPS proteins TSG101 and PDCD6IP/AIP1.
[https://www.uniprot.org/uniprot/GAG_HV2RO GAG_HV2RO] Matrix protein p17 targets Gag and Gag-pol polyproteins to the plasma membrane via a multipartite membrane binding signal. Also mediates nuclear localization of the preintegration complex (By similarity).  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 (By similarity).  p6-gag plays a role in budding of the assembled particle by interacting with the host class E VPS proteins TSG101 and PDCD6IP/AIP1.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Retrovirus immature particle morphology consists of a membrane enclosed, pleomorphic, spherical and incomplete lattice of Gag hexamers. Previously, we demonstrated that human immunodeficiency virus type 2 (HIV-2) immature particles possess a distinct and extensive Gag lattice morphology. To better understand the nature of the continuously curved hexagonal Gag lattice, we have used single particle cryo-electron microscopy with a retrovirus to determine the HIV-2 Gag lattice structure for immature virions. The reconstruction map at 5.5 A resolution revealed a stable, wineglass-shaped Gag hexamer structure with structural features consistent with other lentiviral immature Gag structures. Cryo-electron tomography provided evidence for nearly complete ordered Gag lattice structures in HIV-2 immature particles. We also solved a 1.98 A resolution crystal structure of the carboxyl-terminal domain (CTD) of the HIV-2 capsid (CA) protein that identified a structured helix 12 supported via an interaction of helix 10 in the absence of the SP1 region of Gag. Residues at the helix 10-12 interface proved critical in maintaining HIV-2 particle release and infectivity. Taken together, our findings provide the first 3D organization of HIV-2 immature Gag lattice and important insights into both HIV Gag lattice stabilization and virus maturation.
HIV-2 Immature Particle Morphology Provides Insights into Gag Lattice Stability and Virus Maturation.,Talledge N, Yang H, Shi K, Coray R, Yu G, Arndt WG, Meng S, Baxter GC, Mendonca LM, Castano-Diez D, Aihara H, Mansky LM, Zhang W J Mol Biol. 2023 May 5:168143. doi: 10.1016/j.jmb.2023.168143. PMID:37150290<ref>PMID:37150290</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8fzc" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
</StructureSection>

Latest revision as of 06:46, 19 June 2024

HIV-2 Gag Capsid from Immature Virus-like Particles

8fzc, resolution 5.50Å

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