家蚕chi、gluE和fruA基因与微生物相应基因的同源性及基因水平转移初探 |
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引用本文: | 程廷才,夏庆友,刘春,赵萍,查幸福,徐汉福,向仲怀. 家蚕chi、gluE和fruA基因与微生物相应基因的同源性及基因水平转移初探[J]. 遗传学报, 2004, 31(10): 1082-1088 |
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作者姓名: | 程廷才 夏庆友 刘春 赵萍 查幸福 徐汉福 向仲怀 |
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作者单位: | 西南农业大学,农业部蚕桑学重点实验室,重庆,400716 |
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基金项目: | 国家自然科学基金项目 (编号 :3 0 2 70 691),教育部留学回国人员科研启动基金资助项目 (编号 :2 0 0 3 40 6)~~ |
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摘 要: | 通过对家蚕(Bombyxm mori)大规模EST的分析,发现家蚕的chi、gluE和fruA基因分别与微生物的相应基因存在高度的氨基酸序列同源性,且进化关系很近,但与线虫(Caenorhabditis elegans)、果蝇(Drosophila melanogaster)、按蚊(Anopheles gamble)以及家蚕近缘昆虫的类似基因之间的相似性却非常低。这表明它们可能分别与微生物的同源基因具有共同的祖先,即微生物的基因水平转移给了家蚕,进化途径不属于垂直遗传。
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关 键 词: | 基因水平转移 几丁质酶基因 系统进化 家蚕 |
文章编号: | 0379-4172(2004)10-1082-07 |
Three Bombyx mori Genes,chi,gluE and fruA,Encode Proteins Homologous to Microorganism and Primary Analysis of Horizontal Gene Transfer |
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Abstract: | According to the analysis of large scale EST sequencing of silkworm,Bombyx mori,we found that chi,glue and fruA of silkworm have very high homology at amino acid level and closely phylogenetic relative with that of microorganism,but lower similarity with genes of eelworm (Caenorhabditis elegans),fruitfly (Drosophila melanogaster),mosquito (Anopheles gambiae) and other relative insects,respectively.It indicates that each of them is likely to have common ancestor with that of microorganism.Namely,microbial genes were likely transferred to silkworm by horizontal gene transfer,instead of the vertical inheritance in evolutionary manner. |
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Keywords: | horizontal gene transfer chitinase gene phylogenesis Bombyx mori |
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