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Comparing feedback strategies for minimizing noise in gene expression event timing

机译:比较反馈策略以最大限度地减少基因表达事件定时中的噪声

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Many cellular events occur when their corresponding regulatory proteins attain critical thresholds. Can cells schedule such events with precision by controlling the dynamics of the proteins? We investigate this question by considering a simple gene expression model that consists of switching the gene between OFF and ON states and degradation of the protein. Because feedback regulation is a pervasive method of control in biological systems, we analyzed three feedback mechanisms (protein regulates either its own transcription, or the rate at which gene turns ON, or the rate at which gene turns OFF) for their abilities to suppress noise in timing. We show that in the limiting case where the protein does not degrade, feedbacks always amplify noise in event timing.
机译:当它们相应的调节蛋白获得临界阈值时,发生许多细胞事件。 通过控制蛋白质的动态,细胞可以用精确度提出这种事件吗? 我们通过考虑一个简单的基因表达模型来调查这个问题,该模型包括在断开和状态之间切换基因和蛋白质的降解。 因为反馈调节是生物系统中的普遍存器方法,我们分析了三种反馈机制(蛋白质调节其自身的转录,或基因转弯的速率或基因的速率转换为抑制噪声的能力 在时间。 我们表明,在蛋白质不会降低的限制情况下,反馈总是放大事件定时中的噪声。

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