POLIOVIRUS TYPE 3/SAUKETT - ANTIGENIC AND STRUCTURAL CORRELATES OF SEQUENCE VARIATION IN THE CAPSID PROTEINS

被引:7
作者
HUOVILAINEN, A [1 ]
KINNUNEN, L [1 ]
POYRY, T [1 ]
LAAKSONEN, L [1 ]
ROIVAINEN, M [1 ]
HOVI, T [1 ]
机构
[1] CTR SCI CALCULAT,ESPOO,FINLAND
关键词
D O I
10.1006/viro.1994.1116
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The Saukett/USA/50 strain is the type 3 component of the inactivated poliovirus vaccine. The capsid-coding region of genomic RNA of Saukett strains from five different sources was sequenced and the sequence differences were correlated with antigenic differences measurable with poliovirus type S-specific neutralizing monoclonal antibodies. All strains appeared to have capsid protein genes identical in size to those of the entirely sequenced type 3 poliovirus strains. The nucleotide sequence identity between the strains was 91% on the average and the strains could be divided into three groups. Amino acid differences were seen in 30 positions located throughout the capsid region both within and outside the known antigenic sites. Substitutions at the known antigenic sites explained most of the observed antigenic differences. Use of the atomic coordinates of the crystal structure model of the Sabin 3 virus and prior data based on escape mutants and peptide scanning revealed that most of the exposed substitutions located outside the known antigenic sites are spatially associated with regions found to be antigenic by either or both of these methods. © 1994 Academic Press. All rights reserved.
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页码:228 / 232
页数:5
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