6ssj: Difference between revisions
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==Human endogenous retrovirus (HML2) mature capsid assembly, T=1 icosahedron== | |||
<StructureSection load='6ssj' size='340' side='right'caption='[[6ssj]], [[Resolution|resolution]] 2.75Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6ssj]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6SSJ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6SSJ FirstGlance]. <br> | |||
</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=6ssj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ssj OCA], [http://pdbe.org/6ssj PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ssj RCSB], [http://www.ebi.ac.uk/pdbsum/6ssj PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ssj ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/GAK24_HUMAN GAK24_HUMAN]] The products of the Gag polyproteins of infectious retroviruses perform highly complex orchestrated tasks during the assembly, budding, maturation, and infection stages of the viral replication cycle. During viral assembly, the proteins form membrane associations and self-associations that ultimately result in budding of an immature virion from the infected cell. Gag precursors also function during viral assembly to selectively bind and package two plus strands of genomic RNA. Endogenous Gag proteins may have kept, lost or modified their original function during evolution. | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The HML2 (HERV-K) group constitutes the most recently acquired family of human endogenous retroviruses, with many proviruses less than one million years old. Many maintain intact open reading frames and provirus expression together with HML2 particle formation are observed in early stage human embryo development and are associated with pluripotency as well as inflammatory disease, cancers and HIV-1 infection. Here, we reconstruct the core structural protein (CA) of an HML2 retrovirus, assemble particles in vitro and employ single particle cryogenic electron microscopy (cryo-EM) to determine structures of four classes of CA Fullerene shell assemblies. These icosahedral and capsular assemblies reveal at high-resolution the molecular interactions that allow CA to form both pentamers and hexamers and show how invariant pentamers and structurally plastic hexamers associate to form the unique polyhedral structures found in retroviral cores. | |||
Structural basis for Fullerene geometry in a human endogenous retrovirus capsid.,Acton O, Grant T, Nicastro G, Ball NJ, Goldstone DC, Robertson LE, Sader K, Nans A, Ramos A, Stoye JP, Taylor IA, Rosenthal PB Nat Commun. 2019 Dec 20;10(1):5822. doi: 10.1038/s41467-019-13786-y. PMID:31862888<ref>PMID:31862888</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6ssj" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Acton, O J.H]] | |||
[[Category: Rosenthal, P B]] | |||
[[Category: Taylor, I A]] | |||
[[Category: Mature retrovirus capsid assembly]] | |||
[[Category: Viral protein]] | |||
Revision as of 11:23, 1 January 2020
Human endogenous retrovirus (HML2) mature capsid assembly, T=1 icosahedronHuman endogenous retrovirus (HML2) mature capsid assembly, T=1 icosahedron
Structural highlights
Function[GAK24_HUMAN] The products of the Gag polyproteins of infectious retroviruses perform highly complex orchestrated tasks during the assembly, budding, maturation, and infection stages of the viral replication cycle. During viral assembly, the proteins form membrane associations and self-associations that ultimately result in budding of an immature virion from the infected cell. Gag precursors also function during viral assembly to selectively bind and package two plus strands of genomic RNA. Endogenous Gag proteins may have kept, lost or modified their original function during evolution. Publication Abstract from PubMedThe HML2 (HERV-K) group constitutes the most recently acquired family of human endogenous retroviruses, with many proviruses less than one million years old. Many maintain intact open reading frames and provirus expression together with HML2 particle formation are observed in early stage human embryo development and are associated with pluripotency as well as inflammatory disease, cancers and HIV-1 infection. Here, we reconstruct the core structural protein (CA) of an HML2 retrovirus, assemble particles in vitro and employ single particle cryogenic electron microscopy (cryo-EM) to determine structures of four classes of CA Fullerene shell assemblies. These icosahedral and capsular assemblies reveal at high-resolution the molecular interactions that allow CA to form both pentamers and hexamers and show how invariant pentamers and structurally plastic hexamers associate to form the unique polyhedral structures found in retroviral cores. Structural basis for Fullerene geometry in a human endogenous retrovirus capsid.,Acton O, Grant T, Nicastro G, Ball NJ, Goldstone DC, Robertson LE, Sader K, Nans A, Ramos A, Stoye JP, Taylor IA, Rosenthal PB Nat Commun. 2019 Dec 20;10(1):5822. doi: 10.1038/s41467-019-13786-y. PMID:31862888[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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