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酿酒酵母群体中DUP240多基因家族的扩增与收缩

Expansion and contraction of the DUP240 multigene family in Saccharomyces cerevisiae populations.

作者信息

Leh-Louis Véronique, Wirth Bénédicte, Potier Serge, Souciet Jean-Luc, Despons Laurence

机构信息

Laboratoire de Microbiologie et de Génétique, FRE 2326 Université Louis Pasteur/Centre National de la Recherche Scientifique, Institut de Botanique, F-67083 Strasbourg, France.

出版信息

Genetics. 2004 Aug;167(4):1611-9. doi: 10.1534/genetics.104.028076.

DOI:10.1534/genetics.104.028076
PMID:15342502
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1470973/
Abstract

The influence of duplicated sequences on chromosomal stability is poorly understood. To characterize chromosomal rearrangements involving duplicated sequences, we compared the organization of tandem repeats of the DUP240 gene family in 15 Saccharomyces cerevisiae strains of various origins. The DUP240 gene family consists of 10 members of unknown function in the reference strain S288C. Five DUP240 paralogs on chromosome I and two on chromosome VII are arranged as tandem repeats that are highly polymorphic in copy number and sequence. We characterized DNA sequences that are likely involved in homologous or nonhomologous recombination events and are responsible for intra- and interchromosomal rearrangements that cause the creation and disappearance of DUP240 paralogs. The tandemly repeated DUP240 genes seem to be privileged sites of gene birth and death.

摘要

重复序列对染色体稳定性的影响目前还知之甚少。为了表征涉及重复序列的染色体重排，我们比较了15株不同来源的酿酒酵母菌株中DUP240基因家族串联重复序列的组织情况。在参考菌株S288C中，DUP240基因家族由10个功能未知的成员组成。位于第一条染色体上的5个DUP240旁系同源基因和位于第七条染色体上的2个DUP240旁系同源基因排列成串联重复序列，其拷贝数和序列具有高度多态性。我们对可能参与同源或非同源重组事件的DNA序列进行了表征，这些序列导致了DUP240旁系同源基因的产生和消失，进而引起了染色体内和染色体间的重排。串联重复的DUP240基因似乎是基因产生和消亡的特殊位点。

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