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首页> 外文期刊>Genetics: A Periodical Record of Investigations Bearing on Heredity and Variation >Genome-Wide Analysis of mariner-Like Transposable Elements in Rice Reveals Complex Relationships With Stowaway Miniature Inverted Repeat Transposable Elements (MITEs)
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Genome-Wide Analysis of mariner-Like Transposable Elements in Rice Reveals Complex Relationships With Stowaway Miniature Inverted Repeat Transposable Elements (MITEs)

机译：水稻中水手样转座因子的全基因组分析揭示了与偷渡微型反向重复转座因子（MITE）的复杂关系。

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摘要

Stowaway is a superfamily of miniature inverted repeat transposable elements (MITEs) that is widespread and abundant in plant genomes. Like other MITEs, however, its origin and mode of amplification are poorly understood. Several lines of evidence point to plant mariner -like elements (MLEs) as the autonomous partners of the nonautonomous Stowaway MITEs. To better understand this relationship, we have taken advantage of the nearly complete genome sequences of two rice subspecies to generate the first inventory of virtually all MLEs and Stowaway families coexisting in a single plant species. Thirty-four different MLEs were found to group into three major clades and 25 families. More than 22,000 Stowaway MITEs were identified and classified into 36 families. On the basis of detailed sequence comparisons, MLEs were confirmed to be the best candidate autonomous elements for Stowaway MITEs. Surprisingly, however, sequence similarity between MLE and Stowaway families was restricted to the terminal inverted repeats (TIRs) and, in a few cases, to adjacent subterminal sequences. These data suggest a model whereby most of the Stowaway MITEs in rice were cross-mobilized by MLE transposases encoded by distantly related elements.
机译：偷渡者是微型反向重复重复转座元件（MITE）的超家族，广泛存在于植物基因组中。但是，与其他MITE一样，对其起源和扩增方式的了解也很少。多种证据表明，植物水手样元素（MLE）是非自治Stowaway MITE的自主伙伴。为了更好地理解这种关系，我们利用了两个水稻亚种的近乎完整的基因组序列，生成了在单个植物物种中共存的几乎所有MLE和Stowaway家族的第一个清单。发现34个不同的MLE分为三个主要分支和25个家族。确定了超过22,000个Stowaway MITE，并将其分为36个家族。根据详细的序列比较，MLE被确认为Stowaway MITE的最佳候选自主元素。但是，令人惊讶的是，MLE和Stowaway家族之间的序列相似性仅限于末端反向重复序列（TIR），在少数情况下，仅限于相邻的亚末端序列。这些数据表明了一个模型，其中水稻中的大多数Stowaway MITE被远缘相关元件编码的MLE转座酶交叉动员。

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