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1nn8

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[[Image:1nn8.gif|left|200px]]
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{{STRUCTURE_1nn8| PDB=1nn8 | SCENE= }}
{{STRUCTURE_1nn8| PDB=1nn8 | SCENE= }}
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'''CryoEM structure of poliovirus receptor bound to poliovirus'''
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===CryoEM structure of poliovirus receptor bound to poliovirus===
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==Overview==
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Structures of all three poliovirus (PV) serotypes (PV1, PV2, and PV3) complexed with their cellular receptor, PV receptor (PVR or CD155), were determined by cryoelectron microscopy. Both glycosylated and fully deglycosylated CD155 exhibited similar binding sites and orientations in the viral canyon for all three PV serotypes, showing that all three serotypes use a common mechanism for cell entry. Difference maps between the glycosylated and deglycosylated CD155 complexes determined the sites of the carbohydrate moieties that, in turn, helped to verify the position of the receptor relative to the viral surface. The proximity of the CD155 carbohydrate site at Asn105 to the viral surface in the receptor-virus complex suggests that it might interfere with receptor docking, an observation consistent with the properties of mutant CD155. The footprints of CD155 on PV surfaces indicate that the south rim of the canyon dominates the virus-receptor interactions and may correspond to the initial CD155 binding state of the receptor-mediated viral uncoating. In contrast, the interaction of CD155 with the north rim of the canyon, especially the region immediately outside the viral hydrophobic pocket that normally binds a cellular "pocket factor," may be critical for the release of the pocket factor, decreasing the virus stability and hence initiating uncoating. The large area of the CD155 footprint on the PV surface, in comparison with other picornavirus-receptor interactions, could be a potential limitation on the viability of PV escape mutants from antibody neutralization. Many of these are likely to have lost their ability to bind CD155, resulting in there being only three PV serotypes.
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(as it appears on PubMed at http://www.pubmed.gov), where 12663789 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12663789}}
==About this Structure==
==About this Structure==
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[[Category: Picornavirus]]
[[Category: Picornavirus]]
[[Category: Virus/receptor complex]]
[[Category: Virus/receptor complex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 02:44:20 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 19:55:46 2008''

Revision as of 16:55, 27 July 2008

Image:1nn8.png

Template:STRUCTURE 1nn8

CryoEM structure of poliovirus receptor bound to poliovirus

Template:ABSTRACT PUBMED 12663789

About this Structure

1NN8 is a Protein complex structure of sequences from Homo sapiens and Human poliovirus 1 mahoney. Full crystallographic information is available from OCA.

Reference

Complexes of poliovirus serotypes with their common cellular receptor, CD155., He Y, Mueller S, Chipman PR, Bator CM, Peng X, Bowman VD, Mukhopadhyay S, Wimmer E, Kuhn RJ, Rossmann MG, J Virol. 2003 Apr;77(8):4827-35. PMID:12663789

Page seeded by OCA on Sun Jul 27 19:55:46 2008

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