Molecular evolution of a Drosophila homolog of human BRCA2.

Molecular evolution of a Drosophila homolog of human BRCA2.
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人类BRCA2果蝇同系物的分子进化。

DOI:
10.1007/s10709-009-9376-9
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发表时间:
2009-11
期刊:
影响因子:
1.5
通讯作者:
Noor, Mohamed A. F.
Noor, Mohamed A. F.
中科院分区:
生物学4区
文献类型:
--
作者:
Bennett, Sarah M.;Noor, Mohamed A. F.

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人类癌症易感基因BRCA2通过同源重组在双链断裂修复中起作用,它似乎通过重复区域(“BRC重复”)与RAD-51的相互作用起作用。最近在黑腹果蝇中发现了一种假定更简单的同源物dmbrca2,它也影响有丝分裂和减数分裂双链断裂的修复。在这项研究中,我们检查了重复变异的模式,无论是在果蝇假眼和现有的果蝇基因组序列。我们发现BRC重复数在密切相关的果蝇物种内部和物种之间存在广泛的变异,在某种程度上,该属内的变异概括了整个动物界中发现的变异程度。我们通过记录最近的重复扩增(有时在串联阵列中)和可用基因组序列的均质化来描述物种间的进化模式。总的来说,我们已经在一个对人类健康很重要的基因的新模型系统中记录了模式和进化模式。
The human cancer susceptibility gene, BRCA2, functions in double-strand break repair by homologous recombination, and it appears to function via interaction of a repetitive region (“BRC repeats”) with RAD-51. A putatively simpler homolog, dmbrca2, was identified in Drosophila melanogaster recently and also affects mitotic and meiotic double-strand break repair. In this study, we examined patterns of repeat variation both within Drosophila pseudoobscura and among available Drosophila genome sequences. We identified extensive variation within and among closely related Drosophila species in BRC repeat number, to the extent that variation within this genus recapitulates the extent of variation found across the entire animal kingdom. We describe patterns of evolution across species by documenting recent repeat expansions (sometimes in tandem arrays) and homogenizations within available genome sequences. Overall, we have documented patterns and modes of evolution in a new model system of a gene which is important to human health.
DOI: 10.1038/nature06341
发表时间: 2007-11-08
期刊: NATURE
影响因子: 64.8
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