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原文連結
論文資訊
- 類型：已發表論文
- 日期：2008
摘要
Horizontal gene transfer in prokaryotes is rampant on short and intermediate 演化ary time scales. It poses a fundamental problem to our ability to reconstruct the 演化ary tree of life. Is it also frequent over long 演化ary distances? To address this question, we analyzed the 演化 of 2,091 insertion sequences from all 20 major families in 438 completely sequenced prokaryotic 基因組s. Specifically, we mapped insertion sequence occurrence on a 16S rDNA tree of the 基因組s we analyzed, and we also constructed 系統發育 trees of the insertion sequence transposase coding sequences. We found only 30 cases of likely horizontal transfer among distantly related prokaryotic clades. Most of these horizontal transfer events are ancient. Only seven events are recent. Almost all of these transfer events occur between pairs
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