Overexpression limits of fission yeast cell-cycle regulators in vivo and in silico.
Overexpression limits of fission yeast cell-cycle regulators in vivo and in silico.
复制标题
DOI:
10.1038/msb.2011.91
复制
发表时间:
2011-12-06
影响因子:
9.9
通讯作者:
中科院分区:
文献类型:
--
作者:
Cellular systems are generally robust against fluctuations of intracellular parameters such as gene expression level. However, little is known about expression limits of genes required to halt cellular systems. In this study, using the fission yeast Schizosaccharomyces pombe, we developed a genetic ‘tug-of-war’ (gTOW) method to assess the overexpression limit of certain genes. Using gTOW, we determined copy number limits for 31 cell-cycle regulators; the limits varied from 1 to >100. Comparison with orthologs of the budding yeast Saccharomyces cerevisiae suggested the presence of a conserved fragile core in the eukaryotic cell cycle. Robustness profiles of networks regulating cytokinesis in both yeasts (septation-initiation network (SIN) and mitotic exit network (MEN)) were quite different, probably reflecting differences in their physiologic functions. Fragility in the regulation of GTPase spg1 was due to dosage imbalance against GTPase-activating protein (GAP) byr4. Using the gTOW data, we modified a mathematical model and successfully reproduced the robustness of the S. pombe cell cycle with the model.
登录
查看更多内容
影响因子:
64.8
作者:
Alon, U;Surette, MG;Leibler, S
通讯作者:
Leibler, S
影响因子:
64.8
作者:
Barkai, N;Leibler, S
通讯作者:
Leibler, S
影响因子:
2
作者:
Morohashi, M;Winn, AE;Kitano, H
通讯作者:
Kitano, H
影响因子:
64.8
作者:
Dekel, E;Alon, U
通讯作者:
Alon, U
影响因子:
10.7
作者:
Wagner, A
通讯作者:
Wagner, A