Recent horizontal transfer of mellifera subfamily Mariner transposons into insect lineages representing four different orders shows that selection acts only during horizontal transfer
Recent horizontal transfer of mellifera subfamily Mariner transposons into insect lineages representing four different orders shows that selection acts only during horizontal transfer
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DOI：
10.1093/molbev/msg069
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发表时间：
2003-04-01
影响因子：
10.7
通讯作者：
Robertson, HM
中科院分区：
文献类型：
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作者：
Lampe, DJ;Witherspoon, DJ;Robertson, HM
我们报告了近期水平转移到欧洲蠼螋（Forficula aurillaryia）基因组中的水手转座子基因组拷贝的分离和测序；欧洲蜜蜂，Apis mellifera；地中海果蝇 Ceratitis headata；还有水泡甲虫（Epicauta funebris），这是四种不同目的昆虫。这些元素属于 mellifera 亚科，是涉及此类现象的第二个有记录的全长水手元素的例子。我们对编码序列应用了最大似然法，并确定每个基因组中的拷贝都是中性进化的，而重建的祖先编码序列似乎处于选择之下，这强化了我们之前的假设，即水手序列进化的主要选择性限制是基因组之间的水平转移行为。
We report the isolation and sequencing of genomic copies of mariner transposons involved in recent horizontal transfers into the genomes of the European earwig, Forficula auricularia; the European honey bee, Apis mellifera; the Mediterranean fruit fly, Ceratitis capitata; and a blister beetle, Epicauta funebris, insects from four different orders. These elements are in the mellifera subfamily and are the second documented example of full-length mariner elements involved in this kind of phenomenon. We applied maximum likelihood methods to the coding sequences and determined that the copies in each genome were evolving neutrally, whereas reconstructed ancestral coding sequences appeared to be under selection, which strengthens our previous hypothesis that the primary selective constraint on mariner sequence evolution is the act of horizontal transfer between genomes.