The transcription factor Gcr1 stimulates cell growth by participating in nutrient-responsive gene expression on a global level

被引:25
作者
Barbara, Kellie E. [1 ]
Haley, Terry M. [1 ]
Willis, Kristine A. [1 ]
Santangelo, George M. [1 ]
机构
[1] Univ So Mississippi, Funct Genom Network, Hattiesburg, MS 39406 USA
关键词
glycolysis; ribosomal proteins; YBR187W; respiration; cell size; reverse recruitment;
D O I
10.1007/s00438-006-0182-0
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Transcriptomic reprogramming is critical to the coordination between growth and cell cycle progression in response to changing extracellular conditions. In Saccharomyces cerevisiae, the transcription factor Gcr1 contributes to this coordination by supporting maximum expression of G1 cyclins in addition to regulating both glucose-induced and glucose-repressed genes. We report here the comprehensive genome-wide expression profiling of gcr1 Delta cells. Our data show that reduced expression of ribosomal protein genes in gcr1 Delta cells is detectable both 20 min after glucose addition and in steady-state cultures of raffinose-grown cells, showing that this defect is not the result of slow growth or growth on a repressing sugar. However, the large cell phenotype of the gcr1 Delta mutant occurs only in the presence of repressing sugars. GCR1 deletion also results in aberrant derepression of numerous glucose repressed loci; glucose-grown gcr1 Delta cells actively respire, demonstrating that this global alteration in transcription corresponds to significant changes at the physiological level. These data offer an insight into the coordination of growth and cell division by providing an integrated view of the transcriptomic, phenotypic, and metabolic consequences of GCR1 deletion.
引用
收藏
页码:171 / 188
页数:18
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