2of6

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<SX load='2of6' size='340' side='right' viewer='molstar' caption='[[2of6]], [[Resolution|resolution]] 24.00&Aring;' scene=''>
<SX load='2of6' size='340' side='right' viewer='molstar' caption='[[2of6]], [[Resolution|resolution]] 24.00&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[2of6]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/West_nile_virus West nile virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OF6 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=2OF6 FirstGlance]. <br>
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<table><tr><td colspan='2'>[[2of6]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/West_Nile_virus West Nile virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OF6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2OF6 FirstGlance]. <br>
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</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=2of6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2of6 OCA], [http://pdbe.org/2of6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2of6 RCSB], [http://www.ebi.ac.uk/pdbsum/2of6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2of6 ProSAT]</span></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 24&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2of6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2of6 OCA], [https://pdbe.org/2of6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2of6 RCSB], [https://www.ebi.ac.uk/pdbsum/2of6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2of6 ProSAT]</span></td></tr>
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</table>
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/Q9Q6P4_WNV Q9Q6P4_WNV]] Envelope protein E binding to host cell surface receptor is followed by virus internalization through clathrin-mediated endocytosis. Envelope protein E is subsequently involved in membrane fusion between virion and host late endosomes. Synthesized as a homodimer with prM which acts as a chaperone for envelope protein E. After cleavage of prM, envelope protein E dissociate from small envelope protein M and homodimerizes (By similarity).[SAAS:SAAS011998_004_099774]
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[https://www.uniprot.org/uniprot/POLG_KUNJM POLG_KUNJM] Capsid protein C self-assembles to form an icosahedral capsid about 30 nm in diameter. The capsid encapsulates the genomic RNA (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> prM acts as a chaperone for envelope protein E during intracellular virion assembly by masking and inactivating envelope protein E fusion peptide. prM is matured in the last step of virion assembly, presumably to avoid catastrophic activation of the viral fusion peptide induced by the acidic pH of the trans-Golgi network. After cleavage by host furin, the pr peptide is released in the extracellular medium and small envelope protein M and envelope protein E homodimers are dissociated (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> Envelope protein E binding to host cell surface receptor is followed by virus internalization through clathrin-mediated endocytosis. Envelope protein E is subsequently involved in membrane fusion between virion and host late endosomes. Synthesized as a homodimer with prM which acts as a chaperone for envelope protein E. After cleavage of prM, envelope protein E dissociate from small envelope protein M and homodimerizes (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> Non-structural protein 1 is involved in virus replication and regulation of the innate immune response (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> Non-structural protein 2A may be involved viral RNA replication and capsid assembly (Potential).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> Non-structural protein 2B is a required cofactor for the serine protease function of NS3 (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> Serine protease NS3 displays three enzymatic activities: serine protease, NTPase and RNA helicase. NS3 serine protease, in association with NS2B, performs its autocleavage and cleaves the polyprotein at dibasic sites in the cytoplasm: C-prM, NS2A-NS2B, NS2B-NS3, NS3-NS4A, NS4A-2K and NS4B-NS5. NS3 RNA helicase binds RNA and unwinds dsRNA in the 3' to 5' direction (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> Non-structural protein 4A induces host endoplasmic reticulum membrane rearrangements leading to the formation of virus-induced membranous vesicles hosting the dsRNA and polymerase, functioning as a replication complex. NS4A might also regulate the ATPase activity of the NS3 helicase (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> Peptide 2k functions as a signal peptide for NS4B and is required for the interferon antagonism activity of the latter (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> Non-structural protein 4B inhibits interferon (IFN)-induced host STAT1 phosphorylation and nuclear translocation, thereby preventing the establishment of cellular antiviral state by blocking the IFN-alpha/beta pathway (By similarity).<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref> RNA-directed RNA polymerase NS5 replicates the viral (+) and (-) genome, and performs the capping of genomes in the cytoplasm. NS5 methylates viral RNA cap at guanine N-7 and ribose 2'-O positions. Besides its role in genome replication, also prevents the establishment of cellular antiviral state by blocking the interferon-alpha/beta (IFN-alpha/beta) signaling pathway. Inhibits host JAK1 and TYK2 phosphorylation, thereby preventing activation of JAK-STAT signaling pathway.<ref>PMID:18337583</ref> <ref>PMID:20686019</ref> <ref>PMID:15650160</ref> <ref>PMID:20106931</ref>
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<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: West nile virus]]
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[[Category: West Nile virus]]
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[[Category: Chipman, P R]]
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[[Category: Chipman PR]]
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[[Category: Kaufmann, B]]
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[[Category: Kaufmann B]]
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[[Category: Kuhn, R J]]
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[[Category: Kuhn RJ]]
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[[Category: Rossmann, M G]]
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[[Category: Rossmann MG]]
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[[Category: Zhang, Y]]
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[[Category: Zhang Y]]
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[[Category: Em immature flavivirus west nile]]
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[[Category: Icosahedral virus]]
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[[Category: Virus]]
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Current revision

Structure of immature West Nile virus

2of6, resolution 24.00Å

Proteopedia Page Contributors and Editors (what is this?)

OCA

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