通过基序使用的进化对酵母转录网络进行重新布线。
Rewiring of the yeast transcriptional network through the evolution of motif usage.
作者信息
Ihmels Jan, Bergmann Sven, Gerami-Nejad Maryam, Yanai Itai, McClellan Mark, Berman Judith, Barkai Naama
机构信息
Department of Molecular Genetics and Department of Physics of Complex systems, Weizmann Institute of Science, Rehovot, Israel.
出版信息
Science. 2005 Aug 5;309(5736):938-40. doi: 10.1126/science.1113833.
Recent experiments revealed large-scale differences in the transcription programs of related species, yet little is known about the genetic basis underlying the evolution of gene expression and its contribution to phenotypic diversity. Here we describe a large-scale modulation of the yeast transcription program that is connected to the emergence of the capacity for rapid anaerobic growth. Genes coding for mitochondrial and cytoplasmic ribosomal proteins display a strongly correlated expression pattern in Candida albicans, but this correlation is lost in the fermentative yeast Saccharomyces cerevisiae. We provide evidence that this change in gene expression is connected to the loss of a specific cis-regulatory element from dozens of genes following the apparent whole-genome duplication event. Our results shed new light on the genetic mechanisms underlying the large-scale evolution of transcriptional networks.
最近的实验揭示了相关物种转录程序的大规模差异,但对于基因表达进化的遗传基础及其对表型多样性的贡献却知之甚少。在此,我们描述了酵母转录程序的一种大规模调控,它与快速厌氧生长能力的出现有关。编码线粒体和细胞质核糖体蛋白的基因在白色念珠菌中呈现出高度相关的表达模式,但在发酵酵母酿酒酵母中这种相关性消失了。我们提供的证据表明,这种基因表达的变化与明显的全基因组复制事件后数十个基因中一个特定顺式调控元件的丢失有关。我们的结果为转录网络大规模进化的遗传机制提供了新的线索。