View source for 1khv

==Crystal Structure of Rabbit Hemorrhagic Disease Virus RNA-dependent RNA polymerase complexed with Lu3+==
<StructureSection load='1khv' size='340' side='right' caption='[[1khv]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1khv]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhdv Rhdv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KHV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KHV FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=LU:LUTETIUM+(III)+ION'>LU</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1khw|1khw]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/RNA-directed_RNA_polymerase RNA-directed RNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.48 2.7.7.48] </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=1khv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1khv OCA], [http://pdbe.org/1khv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1khv RCSB], [http://www.ebi.ac.uk/pdbsum/1khv PDBsum]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/POLG_RHDVF POLG_RHDVF]] NTPase presumably plays a role in replication (By similarity).<ref>PMID:1887589</ref> <ref>PMID:15063122</ref>   Viral genome-linked protein is covalently linked to the 5'-end of the positive-strand, negative-strand genomic RNAs and subgenomic RNA. Acts as a genome-linked replication primer. May recruit ribosome to viral RNA thereby promoting viral proteins translation (By similarity).<ref>PMID:1887589</ref> <ref>PMID:15063122</ref>   3C-like protease processes the polyprotein: 3CLpro-RdRp (p72) is first released by autocleavage, then all other proteins are cleaved (By similarity).<ref>PMID:1887589</ref> <ref>PMID:15063122</ref>   RNA-directed RNA polymerase replicates genomic and antigenomic RNA by recognizing replications specific signals. Transcribes also a subgenomic mRNA by initiating RNA synthesis internally on antigenomic RNA. This sgRNA codes for structural proteins. Catalyzes the covalent attachment VPg with viral RNAs (By similarity).<ref>PMID:1887589</ref> <ref>PMID:15063122</ref>   Capsid protein VP60 self assembles to form an icosahedral capsid with a T=3 symmetry, about 35 nm in diameter, and consisting of 180 capsid proteins. A smaller form of capsid with a diameter of 23 nm might be capsid proteins assembled as icosahedron with T=1 symmetry. The capsid encapsulate VP2 proteins and genomic or subgenomic RNA. Attaches virion to target cells by binding histo-blood group antigens, inducing endocytosis of the viral particle. Acidification of the endosome induces conformational change of capsid protein thereby injecting virus genomic RNA into host cytoplasm (By similarity).<ref>PMID:1887589</ref> <ref>PMID:15063122</ref>  
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/kh/1khv_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
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== Publication Abstract from PubMed ==
The structure of the RNA-dependent RNA polymerase (RdRP) from the rabbit hemorrhagic disease virus has been determined by x-ray crystallography to a 2.5-A resolution. The overall structure resembles a "right hand," as seen before in other polymerases, including the RdRPs of polio virus and hepatitis C virus. Two copies of the polymerase are present in the asymmetric unit of the crystal, revealing active and inactive conformations within the same crystal form. The fingers and palm domains form a relatively rigid unit, but the thumb domain can adopt either "closed" or "open" conformations differing by a rigid body rotation of approximately 8 degrees. Metal ions bind at different positions in the two conformations and suggest how structural changes may be important to enzymatic function in RdRPs. Comparisons between the structures of the alternate conformational states of rabbit hemorrhagic disease virus RdRP and the structures of RdRPs from hepatitis C virus and polio virus suggest novel structure-function relationships in this medically important class of enzymes.

Crystal structures of active and inactive conformations of a caliciviral RNA-dependent RNA polymerase.,Ng KK, Cherney MM, Vazquez AL, Machin A, Alonso JM, Parra F, James MN J Biol Chem. 2002 Jan 11;277(2):1381-7. Epub 2001 Oct 24. PMID:11677245<ref>PMID:11677245</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1khv" style="background-color:#fffaf0;"></div>

==See Also==
*[[RNA polymerase|RNA polymerase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: RNA-directed RNA polymerase]]
[[Category: Rhdv]]
[[Category: Alonso, J M]]
[[Category: Cherney, M M]]
[[Category: James, M N]]
[[Category: Machin, A]]
[[Category: Ng, K K]]
[[Category: Parra, F]]
[[Category: Vazquez, A L]]
[[Category: Rna-dependent rna polymerase]]
[[Category: Transferase]]