3c6r

From Proteopedia

(Difference between revisions)

Revision as of 07:54, 18 July 2018

Low pH Immature Dengue Virus

Structural highlights

3c6r is a 6 chain structure with sequence from Dengue virus type 2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[POLG_DEN2U] 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). 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). Non-structural protein 1 is involved in virus replication and regulation of the innate immune response. Soluble and membrane-associated NS1 may activate human complement and induce host vascular leakage. This effect might explain the clinical manifestations of dengue hemorrhagic fever and dengue shock syndrome (By similarity).

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

Intracellular cleavage of immature flaviviruses is a critical step in assembly that generates the membrane fusion potential of the E glycoprotein. With cryo-electron microscopy we show that the immature dengue particles undergo a reversible conformational change at low pH that renders them accessible to furin cleavage. At a pH of 6.0, the E proteins are arranged in a herringbone pattern with the pr peptides docked onto the fusion loops, a configuration similar to that of the mature virion. After cleavage, the dissociation of pr is pH-dependent, suggesting that in the acidic environment of the trans-Golgi network pr is retained on the virion to prevent membrane fusion. These results suggest a mechanism by which flaviviruses are processed and stabilized in the host cell secretory pathway.

Structure of the immature dengue virus at low pH primes proteolytic maturation.,Yu IM, Zhang W, Holdaway HA, Li L, Kostyuchenko VA, Chipman PR, Kuhn RJ, Rossmann MG, Chen J Science. 2008 Mar 28;319(5871):1834-7. PMID:18369148^[1]

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

References

↑ Yu IM, Zhang W, Holdaway HA, Li L, Kostyuchenko VA, Chipman PR, Kuhn RJ, Rossmann MG, Chen J. Structure of the immature dengue virus at low pH primes proteolytic maturation. Science. 2008 Mar 28;319(5871):1834-7. PMID:18369148 doi:http://dx.doi.org/319/5871/1834

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/3c6r"

@@ Line 1: / Line 1: @@
 ==Low pH Immature Dengue Virus==
 <StructureSection load='3c6r' size='340' side='right' caption='[[3c6r]], [[Resolution|resolution]] 25.00&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[3c6r]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Dengue_virus_type_2 Dengue virus type 2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C6R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3C6R FirstGlance]. <br>
-</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=3c6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c6r OCA], [http://pdbe.org/3c6r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3c6r RCSB], [http://www.ebi.ac.uk/pdbsum/3c6r PDBsum]</span></td></tr>
+</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=3c6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c6r OCA], [http://pdbe.org/3c6r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3c6r RCSB], [http://www.ebi.ac.uk/pdbsum/3c6r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3c6r ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 11: / Line 12: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c6/3c6r_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c6/3c6r_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

3c6r

From Proteopedia

Revision as of 07:54, 18 July 2018

Low pH Immature Dengue Virus

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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