1c8h

From Proteopedia

(Difference between revisions)

Current revision

CANINE PARVOVIRUS STRAIN D EMPTY CAPSID STRUCTURE AT PH 5.5

Structural highlights

1c8h is a 1 chain structure with sequence from Canine parvovirus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 3.5Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CAPSD_PAVCD Capsid protein self-assembles to form an icosahedral capsid with a T=1 symmetry, about 22 nm in diameter, and consisting of 60 copies of two size variants of the capsid proteins, VP1 and VP2, which differ by the presence of an N-terminal extension in the minor protein VP1. The capsid encapsulates the genomic ssDNA. Capsid proteins are responsible for the attachment to host cell receptor TFRC. This attachment induces virion internalization predominantly through clathrin-endocytosis. Binding to the host receptors also induces capsid rearrangements leading to surface exposure of VP1 N-terminus, specifically its phospholipase A2-like region and nuclear localization signal(s). VP1 N-terminus might serve as a lipolytic enzyme to breach the endosomal membrane during entry into host cell (By similarity). Intracytoplasmic transport involves microtubules and interaction between capsid proteins and host dynein. Exposure of nuclear localization signal probably allows nuclear import of capsids.^[1] ^[2] ^[3]

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

Canine parvovirus (CPV) emerged in 1978 as a host range variant of feline panleukopenia virus (FPV). This change of host was mediated by the mutation of five residues on the surface of the capsid. CPV and FPV enter cells by endocytosis and can be taken up by many non-permissive cell lines, showing that their host range and tissue specificity are largely determined by events occurring after cell entry.We have determined the structures of a variety of strains of CPV and FPV at various pH values and in the presence or absence of Ca(2+). The largest structural difference was found to occur in a flexible surface loop, consisting of residues 359 to 375 of the capsid protein. This loop binds a divalent calcium ion in FPV and is adjacent to a double Ca(2+)-binding site, both in CPV and FPV. Residues within the loop and those associated with the double Ca(2+)-binding site were found to be essential for virus infectivity. The residues involved in the double Ca(2+)-binding site are conserved only in FPV and CPV.Our results show that the loop conformation and the associated Ca(2+)-binding are influenced by the Ca(2+) concentration, as well as pH. These changes are correlated with the ability of the virus to hemagglutinate erythrocytes. The co-localization of hemagglutinating activity and host range determinants on the virus surface implies that these properties may be functionally linked. We speculate that the flexible loop and surrounding regions are involved in binding an as yet unidentified host molecule and that this interaction influences host range.

Host range and variability of calcium binding by surface loops in the capsids of canine and feline parvoviruses.,Simpson AA, Chandrasekar V, Hebert B, Sullivan GM, Rossmann MG, Parrish CR J Mol Biol. 2000 Jul 14;300(3):597-610. PMID:10884355^[4]

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

References

↑ Vihinen-Ranta M, Wang D, Weichert WS, Parrish CR. The VP1 N-terminal sequence of canine parvovirus affects nuclear transport of capsids and efficient cell infection. J Virol. 2002 Feb;76(4):1884-91. PMID:11799183
↑ Suikkanen S, Aaltonen T, Nevalainen M, Valilehto O, Lindholm L, Vuento M, Vihinen-Ranta M. Exploitation of microtubule cytoskeleton and dynein during parvoviral traffic toward the nucleus. J Virol. 2003 Oct;77(19):10270-9. PMID:12970411
↑ Harbison CE, Lyi SM, Weichert WS, Parrish CR. Early steps in cell infection by parvoviruses: host-specific differences in cell receptor binding but similar endosomal trafficking. J Virol. 2009 Oct;83(20):10504-14. doi: 10.1128/JVI.00295-09. Epub 2009 Aug 5. PMID:19656887 doi:http://dx.doi.org/10.1128/JVI.00295-09
↑ Simpson AA, Chandrasekar V, Hebert B, Sullivan GM, Rossmann MG, Parrish CR. Host range and variability of calcium binding by surface loops in the capsids of canine and feline parvoviruses. J Mol Biol. 2000 Jul 14;300(3):597-610. PMID:10884355 doi:10.1006/jmbi.2000.3868

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1c8h"

Categories: Canine parvovirus | Large Structures | Rossmann MG | Simpson AA

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1c8h]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Canine_parvovirus Canine parvovirus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1C8H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1C8H FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.5&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1c8h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1c8h OCA], [https://pdbe.org/1c8h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1c8h RCSB], [https://www.ebi.ac.uk/pdbsum/1c8h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1c8h ProSAT]</span></td></tr>
 </table>
@@ Line 14: / Line 15: @@
   <jmolCheckbox>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c8/1c8h_consurf.spt"</scriptWhenChecked>
-    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>

1c8h

From Proteopedia

Current revision

CANINE PARVOVIRUS STRAIN D EMPTY CAPSID STRUCTURE AT PH 5.5

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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