6eh1: Difference between revisions
New page: '''Unreleased structure''' The entry 6eh1 is ON HOLD Authors: Plevka, P., Prochazkova, M. Description: Sacbrood virus of honeybee -expansion state II [[Category: Unreleased Structures]... |
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The entry | ==Sacbrood virus of honeybee - expansion state II== | ||
<SX load='6eh1' size='340' side='right' viewer='molstar' caption='[[6eh1]], [[Resolution|resolution]] 7.25Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6eh1]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Sacbrood_virus Sacbrood virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6EH1 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6EH1 FirstGlance]. <br> | |||
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6eh1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6eh1 OCA], [http://pdbe.org/6eh1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6eh1 RCSB], [http://www.ebi.ac.uk/pdbsum/6eh1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6eh1 ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Infection by sacbrood virus (SBV) from the family Iflaviridae is lethal to honey bee larvae but only rarely causes the collapse of honey bee colonies. Despite the negative effect of SBV on honey bees, the structure of its particles and mechanism of its genome delivery are unknown. Here we present the crystal structure of SBV virion and show that it contains 60 copies of a minor capsid protein (MiCP) attached to the virion surface. No similar MiCPs have been previously reported in any of the related viruses from the order Picornavirales. The location of the MiCP coding sequence within the SBV genome indicates that the MiCP evolved from a C-terminal extension of a major capsid protein by the introduction of a cleavage site for a virus protease. The exposure of SBV to acidic pH, which the virus likely encounters during cell entry, induces the formation of pores at threefold and fivefold axes of the capsid that are 7 A and 12 A in diameter, respectively. This is in contrast to vertebrate picornaviruses, in which the pores along twofold icosahedral symmetry axes are currently considered the most likely sites for genome release. SBV virions lack VP4 subunits that facilitate the genome delivery of many related dicistroviruses and picornaviruses. MiCP subunits induce liposome disruption in vitro, indicating that they are functional analogs of VP4 subunits and enable the virus genome to escape across the endosome membrane into the cell cytoplasm. | |||
Virion structure and genome delivery mechanism of sacbrood honeybee virus.,Prochazkova M, Fuzik T, Skubnik K, Moravcova J, Ubiparip Z, Pridal A, Plevka P Proc Natl Acad Sci U S A. 2018 Jul 9. pii: 1722018115. doi:, 10.1073/pnas.1722018115. PMID:29987012<ref>PMID:29987012</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6eh1" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</SX> | |||
[[Category: Large Structures]] | |||
[[Category: Sacbrood virus]] | |||
[[Category: Plevka, P]] | [[Category: Plevka, P]] | ||
[[Category: Prochazkova, M]] | [[Category: Prochazkova, M]] | ||
[[Category: Empty particle]] | |||
[[Category: Expanded particle]] | |||
[[Category: Icosahedral virus particle]] | |||
[[Category: Iflavirus]] | |||
[[Category: Virus]] | |||