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2r7t

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Revision as of 07:44, 25 October 2017

Crystal Structure of Rotavirus SA11 VP1/RNA (UGUGAACC) Complex

Structural highlights

2r7t is a 2 chain structure with sequence from Simian rotavirus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	2r7o, 2r7q, 2r7r, 2r7s, 2r7u, 2r7v, 2r7w, 2r7x
Gene:	gene 1 (Simian rotavirus)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RDRP_ROTSP] RNA-directed RNA polymerase that is involved in both transcription and genome replication. Together with VP3 capping enzyme, forms an enzyme complex positioned near the channels situated at each of the five-fold vertices of the core. Following infection, the outermost layer of the virus is lost, leaving a double-layered particle (DLP) made up of the core and VP6 shell. VP1 then catalyzes the transcription of fully conservative plus-strand genomic RNAs that are extruded through the DLP's channels into the cytoplasm where they function as mRNAs for translation of viral proteins. One copy of each of the viral (+)RNAs is also recruited during core assembly, together with newly synthesized polymerase complexes and VP2. The polymerase of these novo-formed particles catalyzes the synthesis of complementary minus-strands leading to dsRNA formation. To do so, the polymerase specifically recognizes and binds 4 bases 5'-UGUG-3' in the conserved 3'-sequence of plus-strand RNA templates. VP2 presumably activates the autoinhibited VP1-RNA complex to coordinate packaging and genome replication. Once dsRNA synthesis is complete, the polymerase switches to the transcriptional mode, thus providing secondary transcription.^[1] ^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Rotavirus RNA-dependent RNA polymerase VP1 catalyzes RNA synthesis within a subviral particle. This activity depends on core shell protein VP2. A conserved sequence at the 3' end of plus-strand RNA templates is important for polymerase association and genome replication. We have determined the structure of VP1 at 2.9 A resolution, as apoenzyme and in complex with RNA. The cage-like enzyme is similar to reovirus lambda3, with four tunnels leading to or from a central, catalytic cavity. A distinguishing characteristic of VP1 is specific recognition, by conserved features of the template-entry channel, of four bases, UGUG, in the conserved 3' sequence. Well-defined interactions with these bases position the RNA so that its 3' end overshoots the initiating register, producing a stable but catalytically inactive complex. We propose that specific 3' end recognition selects rotavirus RNA for packaging and that VP2 activates the autoinhibited VP1/RNA complex to coordinate packaging and genome replication.

Mechanism for coordinated RNA packaging and genome replication by rotavirus polymerase VP1.,Lu X, McDonald SM, Tortorici MA, Tao YJ, Vasquez-Del Carpio R, Nibert ML, Patton JT, Harrison SC Structure. 2008 Nov 12;16(11):1678-88. PMID:19000820^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Patton JT, Jones MT, Kalbach AN, He YW, Xiaobo J. Rotavirus RNA polymerase requires the core shell protein to synthesize the double-stranded RNA genome. J Virol. 1997 Dec;71(12):9618-26. PMID:9371626
↑ Lu X, McDonald SM, Tortorici MA, Tao YJ, Vasquez-Del Carpio R, Nibert ML, Patton JT, Harrison SC. Mechanism for coordinated RNA packaging and genome replication by rotavirus polymerase VP1. Structure. 2008 Nov 12;16(11):1678-88. PMID:19000820 doi:10.1016/j.str.2008.09.006
↑ Lu X, McDonald SM, Tortorici MA, Tao YJ, Vasquez-Del Carpio R, Nibert ML, Patton JT, Harrison SC. Mechanism for coordinated RNA packaging and genome replication by rotavirus polymerase VP1. Structure. 2008 Nov 12;16(11):1678-88. PMID:19000820 doi:10.1016/j.str.2008.09.006

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2r7t"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of Rotavirus SA11 VP1/RNA (UGUGAACC) Complex==
 <StructureSection load='2r7t' size='340' side='right' caption='[[2r7t]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2r7o|2r7o]], [[2r7q|2r7q]], [[2r7r|2r7r]], [[2r7s|2r7s]], [[2r7u|2r7u]], [[2r7v|2r7v]], [[2r7w|2r7w]], [[2r7x|2r7x]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">gene 1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10922 Simian rotavirus])</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=2r7t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2r7t OCA], [http://pdbe.org/2r7t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2r7t RCSB], [http://www.ebi.ac.uk/pdbsum/2r7t PDBsum]</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=2r7t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2r7t OCA], [http://pdbe.org/2r7t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2r7t RCSB], [http://www.ebi.ac.uk/pdbsum/2r7t PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2r7t ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 28: / Line 29: @@
 </div>
 <div class="pdbe-citations 2r7t" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[RNA polymerase|RNA polymerase]]
 == References ==
 <references/>

2r7t

From Proteopedia

Revision as of 07:44, 25 October 2017

Crystal Structure of Rotavirus SA11 VP1/RNA (UGUGAACC) Complex

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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