Heikkinen E, Launonen V, Müller E, Bachmann L
Center for Population Biology, University of California at Davis 95616-8554, USA.
J Mol Evol. 1995 Nov;41(5):604-14. doi: 10.1007/BF00175819.
The pvB370 BamHI tandemly repeated satellite DNA family was isolated and analyzed in eight species of the Drosophila virilis group and is probably common to all its members. Unexpectedly, the satellite DNA family showed similar levels of intra- and interspecific sequence variability. An EMBL gene-bank search revealed a high degree of similarity between the members of the pvB370 BamHI satellite DNA sequence family and the direct terminal repeats of the mobile dispersed genetic pDv elements described in D. virilis and other species of the group. However, no similarity was observed to the transcribed and translated part of the pDv elements. It is suggested that the satellite DNA repeats are phylogenetically older than the mobile dispersed genetic pDv element and that the functional pDv elements might have derived from the satellite DNA family through an insertion of a tandemly repeated 36-bp transcription unit.
在果蝇粗壮组的八个物种中分离并分析了pvB370 BamHI串联重复卫星DNA家族，它可能为该组所有成员所共有。出乎意料的是，该卫星DNA家族在种内和种间的序列变异水平相似。对EMBL基因文库的搜索显示，pvB370 BamHI卫星DNA序列家族的成员与在果蝇粗壮种及该组其他物种中描述的可移动分散遗传pDv元件的直接末端重复序列高度相似。然而，未观察到与pDv元件的转录和翻译部分有相似性。有人提出，卫星DNA重复序列在系统发育上比可移动分散遗传pDv元件更古老，并且功能性pDv元件可能是通过串联重复的36bp转录单元的插入从卫星DNA家族衍生而来。
