Specificity of the H-2 L(d)-restricted cytotoxic T-lymphocyte response to the mouse hepatitis virus nucleocapsid protein

被引:9
|
作者
Bergmann, CC [1 ]
Stohlman, SA [1 ]
机构
[1] UNIV SO CALIF,SCH MED,DEPT MOLEC MICROBIOL & IMMUNOL,LOS ANGELES,CA 90033
关键词
D O I
10.1128/JVI.70.5.3252-3257.1996
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Cytotoxic T lymphocytes provide protection against persistent infection of the central nervous system by the JHM strain of mouse hepatitis virus. In BALB/c (H-2(d)) mice, the dominant response is directed against an L(d)-restricted peptide in the nucleocapsid protein (APTAGAFFF). Characterization of the fine specificity of this response revealed that the predicted anchor residues at positions 2 and 9 were the most critical for class I binding. Amino acids at positions 7 and 8 were identified as T-cell receptor contact residues. Virus-induced cytotoxic T lymphocytes to other L(d) motif-containing nucleocapsid peptides were not detected, despite the identification of two epitopes with reduced L(d) affinity. These data suggest that mutations within four residues of the dominant epitope could contribute to the persistence of the JHM strain of mouse hepatitis virus.
引用
收藏
页码:3252 / 3257
页数:6
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