Knoop V, Unseld M, Marienfeld J, Brandt P, Sünkel S, Ullrich H, Brennicke A
Institut für Genbiologische Forschung, Berlin, Germany.
Genetics. 1996 Feb;142(2):579-85. doi: 10.1093/genetics/142.2.579.
Several retrotransposon fragments are integrated in the mitochondrial genome of Arabidopsis thaliana. These insertions are derived from all three classes of nuclear retrotransposons, the Ty1/copia-, Ty3/gypsy- and non-LTR/LINE-families. Members of the Ty3/gypsy group of elements have not yet been identified in the nuclear genome of Arabidopsis. The varying degrees of similarity with nuclear elements and the dispersed locations of the sequences in the mitochondrial genome suggest numerous independent transfer-insertion events in the evolutionary history of this plant mitochondrial genome. Overall, we estimate remnants of retrotransposons to cover > or = 5% of the mitochondrial genome in Arabidopsis.
几个反转录转座子片段整合在拟南芥的线粒体基因组中。这些插入片段来源于核内反转录转座子的所有三类，即Ty1/copia类、Ty3/gypsy类和非LTR/LINE家族。在拟南芥的核基因组中尚未鉴定出Ty3/gypsy类元件的成员。与核元件的不同程度的相似性以及线粒体基因组中序列的分散位置表明，在这种植物线粒体基因组的进化历史中有许多独立的转移插入事件。总体而言，我们估计反转录转座子的残余序列覆盖了拟南芥线粒体基因组的5%或更多。
