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- W1623962303 abstract "Five distinct cytotoxic T-lymphocyte (CTL) recognition sites were identified in the simian virus 40 (SV40) T antigen by using H-2b cells that express the truncated T antigen or antigens carrying internal deletions of various sizes. Four of the CTL recognition determinants, designated sites I, II, III, and V, are H-2Db restricted, while site IV is H-2Kb restricted. The boundaries of CTL recognition sites I, II, and III, clustered in the amino-terminal half of the T antigen, were further defined by use of overlapping synthetic peptides containing amino acid sequences previously determined to be required for recognition by T-antigen site-specific CTL clones by using SV40 deletion mutants. CTL clone Y-1, which recognizes epitope I and whose reactivity is affected by deletion of residues 193 to 211 of the T antigen, responded positively to B6/PY cells preincubated with a synthetic peptide corresponding to T-antigen amino acids 205 to 219. CTL clones Y-2 and Y-3 lysed B6/PY cells preincubated with large-T peptide LT220-233. To distinguish further between epitopes II and III, Y-2 and Y-3 CTL clones were reacted with SV40-transformed cells bearing mutations in the major histocompatibility complex class I antigen. Y-2 CTL clones lysed SV40-transformed H-2Dbm13 cells (bm13SV) which carry several amino acid substitutions in the putative antigen-binding site in the alpha 2 domain of the H-2Db antigen but not bm14SV cells, which contain a single amino acid substitution in the alpha 1 domain. Y-3 CTL clones lysed both mutant transformants. Y-1 and Y-5 CTL clones failed to lyse bm13SV and bm14SV cells; however, these cells could present synthetic peptide LT205-219 to CTL clone Y-1 and peptide SV26(489-503) to CTL clone Y-5, suggesting that the endogenously processed T antigen yields fragments of sizes or sequences different from those of synthetic peptides LT205-219 and SV26(489-503)." @default.
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- W1623962303 date "1990-03-01" @default.
- W1623962303 modified "2023-09-27" @default.
- W1623962303 title "Dissection of H-2Db-restricted cytotoxic T-lymphocyte epitopes on simian virus 40 T antigen by the use of synthetic peptides and H-2Dbm mutants" @default.
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- W1623962303 doi "https://doi.org/10.1128/jvi.64.3.1192-1200.1990" @default.
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