作者
Anna Kuchina, Lorena Espinar, Tolga Çağatay, Alejandro O Balbin, Fang Zhang, Alma Alvarado, Jordi Garcia‐Ojalvo, Gürol M Süel
发表日期
2011/12/6
期刊
Molecular systems biology
卷号
7
期号
1
页码范围
557
出版商
John Wiley & Sons, Ltd
简介
Multipotent differentiation, where cells adopt one of several possible fates, occurs in diverse systems ranging from bacteria to mammals. This decision‐making process is driven by multiple differentiation programs that operate simultaneously in the cell. How these programs interact to govern cell fate choice is poorly understood. To investigate this issue, we simultaneously measured activities of the competing sporulation and competence programs in single Bacillus subtilis cells. This approach revealed that these competing differentiation programs progress independently without cross‐regulation before the decision point. Cells seem to arrive at a fate choice through differences in the relative timing between the two programs. To test this proposed dynamic mechanism, we altered the relative timing by engineering artificial cross‐regulation between the sporulation and competence circuits. Results suggest a simple …
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