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==Structure of the major structural protein D135 of Acidianus tailed spindle virus (ATSV)==
==Structure of the major structural protein D135 of Acidianus tailed spindle virus (ATSV)==
<StructureSection load='5eqw' size='340' side='right' caption='[[5eqw]], [[Resolution|resolution]] 1.68&Aring;' scene=''>
<StructureSection load='5eqw' size='340' side='right'caption='[[5eqw]], [[Resolution|resolution]] 1.68&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[5eqw]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Acidianus_tailed_spindle_virus Acidianus tailed spindle virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5EQW OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5EQW FirstGlance]. <br>
<table><tr><td colspan='2'>[[5eqw]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Acidianus_tailed_spindle_virus Acidianus tailed spindle virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5EQW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5EQW FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.679&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ATSV_D135 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1797140 Acidianus tailed spindle virus])</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=5eqw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5eqw OCA], [https://pdbe.org/5eqw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5eqw RCSB], [https://www.ebi.ac.uk/pdbsum/5eqw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5eqw ProSAT]</span></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=5eqw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5eqw OCA], [http://pdbe.org/5eqw PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5eqw RCSB], [http://www.ebi.ac.uk/pdbsum/5eqw PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5eqw ProSAT]</span></td></tr>
</table>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A125SJ78_9VIRU A0A125SJ78_9VIRU]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The spindle-shaped virion morphology is common among archaeal viruses, where it is a defining characteristic of many viral families. However, structural heterogeneity intrinsic to spindle-shaped viruses has seriously hindered efforts to elucidate the molecular architecture of these lemon-shaped capsids. We have utilized a combination of cryo-electron microscopy and X-ray crystallography to study Acidianus tailed spindle virus (ATSV). These studies reveal the architectural principles that underlie assembly of a spindle-shaped virus. Cryo-electron tomography shows a smooth transition from the spindle-shaped capsid into the tubular-shaped tail and allows low-resolution structural modeling of individual virions. Remarkably, higher-dose 2D micrographs reveal a helical surface lattice in the spindle-shaped capsid. Consistent with this, crystallographic studies of the major capsid protein reveal a decorated four-helix bundle that packs within the crystal to form a four-start helical assembly with structural similarity to the tube-shaped tail structure of ATSV and other tailed, spindle-shaped viruses. Combined, this suggests that the spindle-shaped morphology of the ATSV capsid is formed by a multistart helical assembly with a smoothly varying radius and allows construction of a pseudoatomic model for the lemon-shaped capsid that extends into a tubular tail. The potential advantages that this novel architecture conveys to the life cycle of spindle-shaped viruses, including a role in DNA ejection, are discussed.
Structural studies of Acidianus tailed spindle virus reveal a structural paradigm used in the assembly of spindle-shaped viruses.,Hochstein R, Bollschweiler D, Dharmavaram S, Lintner NG, Plitzko JM, Bruinsma R, Engelhardt H, Young MJ, Klug WS, Lawrence CM Proc Natl Acad Sci U S A. 2018 Feb 27;115(9):2120-2125. doi:, 10.1073/pnas.1719180115. Epub 2018 Feb 12. PMID:29440399<ref>PMID:29440399</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5eqw" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Acidianus tailed spindle virus]]
[[Category: Acidianus tailed spindle virus]]
[[Category: Hochstein, R A]]
[[Category: Large Structures]]
[[Category: Lawrence, C M]]
[[Category: Hochstein RA]]
[[Category: Lintner, N G]]
[[Category: Lawrence CM]]
[[Category: Young, M J]]
[[Category: Lintner NG]]
[[Category: Archaeal virus]]
[[Category: Young MJ]]
[[Category: Four helix bundle]]
[[Category: Large tailed spindle virus]]
[[Category: Structural protein]]

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