黑腹果蝇Amy基因座中重复基因编码的α-淀粉酶变体的进化关系和序列变异
Evolutionary relationships and sequence variation of alpha-amylase variants encoded by duplicated genes in the Amy locus of Drosophila melanogaster.
作者信息
Inomata N, Shibata H, Okuyama E, Yamazaki T
机构信息
Department of Biology, Faculty of Science, Kyushu University, Fukuoka, Japan.
出版信息
Genetics. 1995 Sep;141(1):237-44. doi: 10.1093/genetics/141.1.237.
Abstract
To infer the genealogical relationships of alpha-amylase electromorphs of Drosophila melanogaster, we determined the nucleotide sequences of a collection of electromorphs sampled throughout the world. On average there were 1.0 amino acid substitutions between identical electromorphs and 3.9 between different electromorphs, respectively. We found that the evolution of AMY1 through AMY6 electromorphs occurred by sequential accumulation of single amino acid substitutions each causing one charge difference. The nucleotide diversities at synonymous sites within Amy1,Amy2,Amy3,Amy4 and Amy6 were 0.0321, 0.0000, 0.0355, 0.0059 and 0.0030, respectively. We also obtained evidence of genetic exchanges, such as intrachromosomal recombination, interchromosomal recombination or gene conversion, between the two duplicated Amy genes as well as among the alleles.
摘要
为了推断黑腹果蝇α-淀粉酶电变体的谱系关系，我们测定了从世界各地采集的一系列电变体的核苷酸序列。相同电变体之间平均有1.0个氨基酸替换，不同电变体之间平均有3.9个氨基酸替换。我们发现，AMY1至AMY6电变体的进化是通过单个氨基酸替换的顺序积累发生的，每次替换导致一个电荷差异。Amy1、Amy2、Amy3、Amy4和Amy6内同义位点的核苷酸多样性分别为0.0321、0.0000、0.0355、0.0059和0.0030。我们还获得了两个重复的Amy基因之间以及等位基因之间发生遗传交换的证据，如染色体内重组、染色体间重组或基因转换。
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