3o8b: Difference between revisions
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==Visualizing ATP-dependent RNA Translocation by the NS3 Helicase from HCV== | |||
<StructureSection load='3o8b' size='340' side='right'caption='[[3o8b]], [[Resolution|resolution]] 1.95Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3o8b]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Hepatitis_C_virus_subtype_1b Hepatitis C virus subtype 1b]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3O8B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3O8B FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.95Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=3o8b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3o8b OCA], [https://pdbe.org/3o8b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3o8b RCSB], [https://www.ebi.ac.uk/pdbsum/3o8b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3o8b ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/Q99AU2_9HEPC Q99AU2_9HEPC] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The structural mechanism by which nonstructural protein 3 (NS3) from the hepatitis C virus (HCV) translocates along RNA is currently unknown. HCV NS3 is an ATP-dependent motor protein essential for viral replication and a member of the superfamily 2 helicases. Crystallographic analysis using a labeled RNA oligonucleotide allowed us to unambiguously track the positional changes of RNA bound to full-length HCV NS3 during two discrete steps of the ATP hydrolytic cycle. The crystal structures of HCV NS3, NS3 bound to bromine-labeled RNA, and a tertiary complex of NS3 bound to labeled RNA and a non-hydrolyzable ATP analog provide a direct view of how large domain movements resulting from ATP binding and hydrolysis allow the enzyme to translocate along the phosphodiester backbone. While directional translocation of HCV NS3 by a single base pair per ATP hydrolyzed is observed, the 3' end of the RNA does not shift register with respect to a conserved tryptophan residue, supporting a "spring-loading" mechanism that leads to larger steps by the enzyme as it moves along a nucleic acid substrate. | |||
Visualizing ATP-Dependent RNA Translocation by the NS3 Helicase from HCV.,Appleby TC, Anderson R, Fedorova O, Pyle AM, Wang R, Liu X, Brendza KM, Somoza JR J Mol Biol. 2010 Dec 9. PMID:21145896<ref>PMID:21145896</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 3o8b" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Helicase|Helicase]] | *[[Helicase 3D structures|Helicase 3D structures]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
[[Category: Hepatitis | </StructureSection> | ||
[[Category: | [[Category: Hepatitis C virus subtype 1b]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Appleby TC]] | ||
[[Category: Somoza JR]] | |||