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3j9b

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Revision as of 05:40, 10 October 2019

Electron cryo-microscopy of an RNA polymerase

Structural highlights

3j9b is a 10 chain structure with sequence from I96a0, Influenza a virus (a/goose/guangdong/3/97(h5n1)) and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Gene:	PA (Influenza A virus (A/Goose/Guangdong/3/97(H5N1))), PB1 (I96A0), PB2 (I96A0)
Activity:	RNA-directed RNA polymerase, with EC number 2.7.7.48
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RDRP_I96A0] RNA-dependent RNA polymerase which is responsible for replication and transcription of virus RNA segments. The transcription of viral mRNAs occurs by a unique mechanism called cap-snatching. 5' methylated caps of cellular mRNAs are cleaved after 10-13 nucleotides by PA. In turn, these short capped RNAs are used as primers by PB1 for transcription of viral mRNAs. During virus replication, PB1 initiates RNA synthesis and copy vRNA into complementary RNA (cRNA) which in turn serves as a template for the production of more vRNAs.[UniProtKB:P03431]

Publication Abstract from PubMed

Replication and transcription of influenza virus genome mainly depend on its RNA-dependent RNA polymerase (RdRP), composed of the PA, PB1, and PB2 subunits. Although extensively studied, the underlying mechanism of the RdRP complex is still unclear. Here we report the biochemical characterization of influenza RdRP subcomplex comprising PA, PB1, and N terminus of PB2, which exist as dimer in solution and can assemble into a tetramer state, regulated by vRNA promoter. Using single-particle cryo-electron microscopy, we have reconstructed the RdRP tetramer complex at 4.3 A, highlighting the assembly and interfaces between monomers within the tetrameric structure. The individual RdRP subcomplex contains all the characterized motifs and appears as a cage-like structure. High-throughput mutagenesis profiling revealed that residues involved in the oligomer state formation are critical for viral life cycle. Our results lay a solid base for understanding the mechanism of replication of influenza and other negative-stranded RNA viruses.

Cryo-EM Structure of Influenza Virus RNA Polymerase Complex at 4.3 A Resolution.,Chang S, Sun D, Liang H, Wang J, Li J, Guo L, Wang X, Guan C, Boruah BM, Yuan L, Feng F, Yang M, Wang L, Wang Y, Wojdyla J, Li L, Wang J, Wang M, Cheng G, Wang HW, Liu Y Mol Cell. 2015 Jan 21. pii: S1097-2765(14)01009-0. doi:, 10.1016/j.molcel.2014.12.031. PMID:25620561^[1]

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

References

↑ Chang S, Sun D, Liang H, Wang J, Li J, Guo L, Wang X, Guan C, Boruah BM, Yuan L, Feng F, Yang M, Wang L, Wang Y, Wojdyla J, Li L, Wang J, Wang M, Cheng G, Wang HW, Liu Y. Cryo-EM Structure of Influenza Virus RNA Polymerase Complex at 4.3 A Resolution. Mol Cell. 2015 Jan 21. pii: S1097-2765(14)01009-0. doi:, 10.1016/j.molcel.2014.12.031. PMID:25620561 doi:http://dx.doi.org/10.1016/j.molcel.2014.12.031

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3j9b"

@@ Line 1: / Line 1: @@
 ==Electron cryo-microscopy of an RNA polymerase==
-<StructureSection load='3j9b' size='340' side='right' caption='[[3j9b]], [[Resolution|resolution]] 4.30&Aring;' scene=''>
+<StructureSection load='3j9b' size='340' side='right'caption='[[3j9b]], [[Resolution|resolution]] 4.30&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3j9b]] is a 10 chain structure with sequence from [http://en.wikipedia.org/wiki/I96a0 I96a0] and [http://en.wikipedia.org/wiki/Influenza_a_virus_(a/goose/guangdong/3/97(h5n1)) Influenza a virus (a/goose/guangdong/3/97(h5n1))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3J9B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3J9B FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3j9b]] is a 10 chain structure with sequence from [http://en.wikipedia.org/wiki/I96a0 I96a0], [http://en.wikipedia.org/wiki/Influenza_a_virus_(a/goose/guangdong/3/97(h5n1)) Influenza a virus (a/goose/guangdong/3/97(h5n1))] and [http://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3J9B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3J9B FirstGlance]. <br>
 </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=UNK:UNKNOWN'>UNK</scene></td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=165512 Influenza A virus (A/Goose/Guangdong/3/97(H5N1))]), PB1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=93838 I96A0]), PB2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=93838 I96A0])</td></tr>
@@ Line 28: / Line 28: @@
 </StructureSection>
 [[Category: I96a0]]
+[[Category: Large Structures]]
 [[Category: RNA-directed RNA polymerase]]
+[[Category: Synthetic construct]]
 [[Category: Boruah, B M]]
 [[Category: Chang, S H]]

3j9b

From Proteopedia

Revision as of 05:40, 10 October 2019

Electron cryo-microscopy of an RNA polymerase

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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