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通过聚合物交叉连接器模型探索并从单个粒子轨迹重建的染色体相隔纳米区域

Andrea Papale¹, David Holcman^1,2

¹Group of Computational Biology and Applied Mathemathics, Ecole Normale Supérieure, IBENS, Université PSL, Paris, France.

PLoS computational biology

|January 24, 2024

概括

阶段分离域 (PSD) 在细胞中形成,聚焦分子并控制接入. 越来越多的交叉连接器凝结了聚合物,限制了这些生物凝结物的分子运动.

科学领域:

细胞生物学细胞生物学
生物物理学的生物物理.
聚合物物理聚合物物理

背景情况:

分相域 (PSD) 是细胞中的关键纳米区域,在突触和细胞核中发现.
PSDs调节分子度,并可以限制转录因子的访问,影响基因表达.

研究的目的:

用一个通用的交叉链接聚合物模型来建模相隔域 (PSD).
调查PSD中的聚合物凝结如何影响分子扩散和访问.
开发一种方法来从单粒子跟踪数据中重建PSD属性.

主要方法:

开发了一个通用的交叉连接器聚合物模型.
计算了扩散分子的平均停留时间和第一次逃离时间.
利用单个粒子轨迹的平均平方位移分析.

主要成果:

越来越多的交叉连接器会诱导聚合物凝结,防止分子进入PSD.
由聚合物产生的PSD不会产生远程吸引场,与突触纳米域不同.
开发了一种方法,从异常扩散指数重建PSD属性.

结论:

PSDs可能来自于凝聚的染色体组织.
交叉连接器的数量是控制PSD分子访问的关键因素.
了解PSD对于理解细胞调节和基因表达至关重要.

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