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表达鸡白细胞介素1β基因重组鸡痘病毒的构建
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邵卫星, 卢建红, 刘玉良, 韦栋平, 彭大新, 刘秀梵
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(扬州大学 农业部畜禽传染病学重点开放实验室, 江苏 扬州225009)
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摘要:从伴刀豆球蛋白(ConA)刺激的鸡脾细胞中扩增出鸡白细胞介素1β(ChIL1β)编码区基因,通过与GenBank上登录的ChIL1β序列(Y15006)进行比较。结果显示,在ChIL1β基因编码区的104位、306位、387位和432位的核苷酸发生了变化;相应的氨基酸在35位也发生了变化。虽然306位、387位和432位的核苷酸发生了变化,但没有引起氨基酸变化,说明这一区域的氨基酸具有一定的保守性。从氨基酸的性质上看,35位(Asp→Ala)由酸性氨基酸变为中性氨基酸,这可能是同一种属的不同品种间的正常变化。以鸡痘病毒(FPV)为活载体,构建了表达ChIL1β的重组鸡痘病毒rFPVIL1β。应用XTT/PMS方法检测rFPVIL1β感染的成纤维细胞72h后表达ChIL1β的生物活性,效价为1.0×105U/mL,证明FPV能有效地表达ChIL1β。 关键词:
白细胞介素1β; 鸡痘病毒; 生物活性
中图分类号:S 852.659.1 文献标识码:
A 文章编号:1000-6419(2004)01-0012-05 |
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Construction of recombinant fowlpox virus expressing chicken IL1β gene
SHAO Weixing, LU Jianhong, LIU Yuliang,
WEI Dongping, PENG Daxin, LIU Xiufan
Key Laboratory of Domestic Animal and Poultry Lemology, Ministry of Agriculture/Yangzhou University, Yangzhou 225009, China) |
Abstract: The cDNA of the chicken interleukin1β (ChIL1β) was cloned from ConAstimulated chicken spleen cells by RTPCR. Compared with the published ChIL1β sequence in the GenBank(accession No.Y15006), nucleotide changes in the cloned ChIL1β sequence were found at nt 104(A→G),306(C→T),387(G→T)and 432(C→A). And the corresponding change of amino acid was found at amino acid 35 (Asp→Ala) of putative polypeptide. The nucleotide variation at nt 306(C→T),387(G→T)and 432(C→A) did not result in amino acid change. Then a recombinant fowlpox virus(rFPV) expressing ChIL1β was constructed and the biologic activity of the recombinant ChIL1β expressed by rFPV in chicken embryo fibroblasts in vitro using XTT/PMS was determined. The result demonstrated that FPV can express effectively ChIL1β.
Key words: interleukin1β (IL1β); fowlpox virus; biologic activity |
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