Pulling chromatin apart: Unstacking or Unwrapping?

Q1 Biochemistry, Genetics and Molecular Biology BMC Biophysics Pub Date : 2012-11-27 DOI:10.1186/2046-1682-5-21
Jean Marc Victor, Jordanka Zlatanova, Maria Barbi, Julien Mozziconacci
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引用次数: 18

Abstract

Unlabelled:

Background: Understanding the mechanical properties of chromatin is an essential step towards deciphering the physical rules of gene regulation. In the past ten years, many single molecule experiments have been carried out, and high resolution measurements of the chromatin fiber stiffness are now available. Simulations have been used in order to link those measurements with structural cues, but so far no clear agreement among different groups has been reached.

Results: We revisit here some of the most precise experimental results obtained with carefully reconstituted fibers.

Conclusions: We show that the mechanical properties of the chromatin fiber can be quantitatively accounted for by the stiffness of the DNA molecule and the 3D structure of the chromatin fiber.

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将染色质分开:拆散还是拆散?
背景:了解染色质的机械特性是破译基因调控的物理规则的重要一步。在过去的十年里,人们进行了许多单分子实验,并对染色质纤维的硬度进行了高分辨率的测量。为了将这些测量结果与结构线索联系起来,已经使用了模拟,但到目前为止,不同小组之间还没有达成明确的共识。结果:我们在这里回顾了一些最精确的实验结果,这些结果是用精心重建的纤维获得的。结论:我们证明了染色质纤维的力学性能可以定量地由DNA分子的刚度和染色质纤维的三维结构来解释。
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BMC Biophysics
BMC Biophysics BIOPHYSICS-
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