6p4h: Difference between revisions
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==Structure of a mammalian small ribosomal subunit in complex with the Israeli Acute Paralysis Virus IRES (Class 2)== | |||
<StructureSection load='6p4h' size='340' side='right'caption='[[6p4h]], [[Resolution|resolution]] 3.20Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6p4h]] is a 36 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6P4H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6P4H FirstGlance]. <br> | |||
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[6p4g|6p4g]]</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=6p4h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6p4h OCA], [http://pdbe.org/6p4h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6p4h RCSB], [http://www.ebi.ac.uk/pdbsum/6p4h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6p4h ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/G1TWL4_RABIT G1TWL4_RABIT]] Required for the assembly and/or stability of the 40S ribosomal subunit. Required for the processing of the 20S rRNA-precursor to mature 18S rRNA in a late step of the maturation of 40S ribosomal subunits. Also functions as a cell surface receptor for laminin. Plays a role in cell adhesion to the basement membrane and in the consequent activation of signaling transduction pathways. May play a role in cell fate determination and tissue morphogenesis. Also acts as a receptor for several other ligands, including the pathogenic prion protein, viruses, and bacteria. Acts as a PPP1R16B-dependent substrate of PPP1CA.[HAMAP-Rule:MF_03016] [[http://www.uniprot.org/uniprot/G1SS70_RABIT G1SS70_RABIT]] May play a role during erythropoiesis through regulation of transcription factor DDIT3.[HAMAP-Rule:MF_03122] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Colony collapse disorder (CCD) is a multi-faceted syndrome decimating bee populations worldwide, and a group of viruses of the widely distributed Dicistroviridae family have been identified as a causing agent of CCD. This family of viruses employs non-coding RNA sequences, called internal ribosomal entry sites (IRESs), to precisely exploit the host machinery for viral protein production. Using single-particle cryo-electron microscopy (cryo-EM), we have characterized how the IRES of Israeli acute paralysis virus (IAPV) intergenic region captures and redirects translating ribosomes toward viral RNA messages. We reconstituted two in vitro reactions targeting a pre-translocation and a post-translocation state of the IAPV-IRES in the ribosome, allowing us to identify six structures using image processing classification methods. From these, we reconstructed the trajectory of IAPV-IRES from the early small subunit recruitment to the final post-translocated state in the ribosome. An early commitment of IRES/ribosome complexes for global pre-translocation mimicry explains the high efficiency observed for this IRES. Efforts directed toward fighting CCD by targeting the IAPV-IRES using RNA-interference technology are underway, and the structural framework presented here may assist in further refining these approaches. | |||
The Israeli acute paralysis virus IRES captures host ribosomes by mimicking a ribosomal state with hybrid tRNAs.,Acosta-Reyes F, Neupane R, Frank J, Fernandez IS EMBO J. 2019 Oct 14:e102226. doi: 10.15252/embj.2019102226. PMID:31609474<ref>PMID:31609474</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6p4h" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Oryctolagus cuniculus]] | |||
[[Category: Acosta-Reyes, F J]] | |||
[[Category: Fernandez, I S]] | |||
[[Category: Frank, J]] | |||
[[Category: Neupane, R]] | |||
[[Category: Internal ribosome entry site]] | |||
[[Category: Ire]] | |||
[[Category: Israeli acute paralysis virus]] | |||
[[Category: Ribosome]] | |||
[[Category: Small ribosomal subunit]] | |||