Kondo T, Uenishi H, Shimizu T, Hirama T, Iwashiro M, Kuribayashi K, Tamamura H, Fujii N, Fujisawa R, Miyazawa M
Department of Biophysics, Faculty of Science, Kyoto University, Japan.
J Virol. 1995 Nov;69(11):6735-41. doi: 10.1128/JVI.69.11.6735-6741.1995.
Several dominant T-cell receptors of cytotoxic T-lymphocyte (CTL) clones specific for FBL-3 tumor antigen were clonally amplified in mixed lymphocyte tumor cell cultures derived from an individual immune mouse. Every CTL clone analyzed had a common specificity for a single epitope in the precursor to cell membrane-associated nonstructural gag-encoded protein, Pr75gag, which can be minimally identified by nine amino acid residues, SIVLCCLCL. This epitope is located within the hydrophobic signal sequence motif that mediates translocation of the protein into the endoplasmic reticulum. These novel observations suggest that expression of Pr75gag in FBL-3 tumor cells led to the amplification of CTLs which recognize the signal sequence of the nonstructural gag-encoded glycoprotein precursor.
在源自一只免疫小鼠的混合淋巴细胞肿瘤细胞培养物中,对几种针对FBL - 3肿瘤抗原的细胞毒性T淋巴细胞(CTL)克隆的主要T细胞受体进行了克隆扩增。分析的每个CTL克隆对细胞膜相关非结构gag编码蛋白Pr75gag前体中的单个表位具有共同的特异性,该表位可由九个氨基酸残基SIVLCCLCL最小限度地鉴定。此表位位于介导蛋白质转运至内质网的疏水信号序列基序内。这些新发现表明,FBL - 3肿瘤细胞中Pr75gag的表达导致了识别非结构gag编码糖蛋白前体信号序列的CTL的扩增。