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{{STRUCTURE_3j4f| PDB=3j4f | SCENE= }}
==Structure of HIV-1 capsid protein by cryo-EM==
===Structure of HIV-1 capsid protein by cryo-EM===
<StructureSection load='3j4f' size='340' side='right' caption='[[3j4f]], [[Resolution|resolution]] 8.60&Aring;' scene=''>
{{ABSTRACT_PUBMED_23719463}}
== Structural highlights ==
<table><tr><td colspan='2'>[[3j4f]] is a 6 chain structure with 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=3J4F OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3J4F FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3j34|3j34]], [[3j3y|3j3y]], [[3j3q|3j3q]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">gag ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=11676 Human immunodeficiency virus 1])</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3j4f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3j4f OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3j4f RCSB], [http://www.ebi.ac.uk/pdbsum/3j4f PDBsum]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Retroviral capsid proteins are conserved structurally but assemble into different morphologies. The mature human immunodeficiency virus-1 (HIV-1) capsid is best described by a 'fullerene cone' model, in which hexamers of the capsid protein are linked to form a hexagonal surface lattice that is closed by incorporating 12 capsid-protein pentamers. HIV-1 capsid protein contains an amino-terminal domain (NTD) comprising seven alpha-helices and a beta-hairpin, a carboxy-terminal domain (CTD) comprising four alpha-helices, and a flexible linker with a 310-helix connecting the two structural domains. Structures of the capsid-protein assembly units have been determined by X-ray crystallography; however, structural information regarding the assembled capsid and the contacts between the assembly units is incomplete. Here we report the cryo-electron microscopy structure of a tubular HIV-1 capsid-protein assembly at 8 A resolution and the three-dimensional structure of a native HIV-1 core by cryo-electron tomography. The structure of the tubular assembly shows, at the three-fold interface, a three-helix bundle with critical hydrophobic interactions. Mutagenesis studies confirm that hydrophobic residues in the centre of the three-helix bundle are crucial for capsid assembly and stability, and for viral infectivity. The cryo-electron-microscopy structures enable modelling by large-scale molecular dynamics simulation, resulting in all-atom models for the hexamer-of-hexamer and pentamer-of-hexamer elements as well as for the entire capsid. Incorporation of pentamers results in closer trimer contacts and induces acute surface curvature. The complete atomic HIV-1 capsid model provides a platform for further studies of capsid function and for targeted pharmacological intervention.


==Function==
Mature HIV-1 capsid structure by cryo-electron microscopy and all-atom molecular dynamics.,Zhao G, Perilla JR, Yufenyuy EL, Meng X, Chen B, Ning J, Ahn J, Gronenborn AM, Schulten K, Aiken C, Zhang P Nature. 2013 May 30;497(7451):643-6. doi: 10.1038/nature12162. PMID:23719463<ref>PMID:23719463</ref>
[[http://www.uniprot.org/uniprot/Q79791_9HIV1 Q79791_9HIV1]] Capsid protein p24 forms the conical core of the virus that encapsulates the genomic RNA-nucleocapsid complex (By similarity).[SAAS:SAAS000071_004_008806]  Nucleocapsid protein p7 encapsulates and protects viral dimeric unspliced (genomic) RNA. Binds these RNAs through its zinc fingers (By similarity).[SAAS:SAAS000071_004_011858]


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[3j4f]] is a 6 chain structure with 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=3J4F OCA].
</div>
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:023719463</ref><references group="xtra"/><references/>
__TOC__
</StructureSection>
[[Category: Human immunodeficiency virus 1]]
[[Category: Human immunodeficiency virus 1]]
[[Category: Meng, X.]]
[[Category: Meng, X]]
[[Category: Perilla, J R.]]
[[Category: Perilla, J R]]
[[Category: Schulten, K.]]
[[Category: Schulten, K]]
[[Category: Zhang, P.]]
[[Category: Zhang, P]]
[[Category: Zhao, G.]]
[[Category: Zhao, G]]
[[Category: All-atom model]]
[[Category: All-atom model]]
[[Category: Core]]
[[Category: Core]]
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