Biology Department, University of Rochester, Rochester, NY 14627, USA.
Insect Mol Biol. 2010 Feb;19 Suppl 1:37-48. doi: 10.1111/j.1365-2583.2009.00949.x.
Sequencing reads from the Nasonia genome project were used to study the ribosomal RNA gene loci and the retrotransposons R1 and R2 that insert specifically into the 28S genes. Five highly divergent R1 and five highly divergent R2 families were identified in the three sequenced species, as well as a non-autonomous element that appears to use the retrotransposition machinery of R1. A duplication of the R1 target site within the spacer region of the rDNA units was also found to be extensively utilized by R1 elements. We document numerous instances where the R1 and R2 families appropriated parts of the retrotransposition machinery of other lineages and speculate that this enables rapid adaptation and the maintenance of multiple R1 and R2 families.
利用 Nasonia 基因组项目的测序reads，研究了核糖体 RNA 基因座和专门插入 28S 基因的逆转录转座子 R1 和 R2。在这三个测序物种中，鉴定出了五个高度分化的 R1 和五个高度分化的 R2 家族，以及一个似乎利用 R1 逆转录转座机制的非自主元件。还发现 rDNA 单位间隔区中的 R1 靶位点重复，被 R1 元件广泛利用。我们记录了许多 R1 和 R2 家族利用其他谱系逆转录转座机制部分的实例，并推测这使它们能够快速适应和维持多个 R1 和 R2 家族。
