arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1007.4467q-bio.BMcs.ITmath.ITphysics.bio-ph
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作为信息通道的分子识别:构象变化的作用

Molecular Recognition as an Information Channel: The Role of Conformational Changes

Yonatan Savir, Tsvi Tlusty

摘要:

分子识别是生物系统中处理信息的关键,它发生在拥挤嘈杂的生物化学环境中,需要在各种相似竞争分子的背景下识别特定的靶标。我们认为分子识别作为一个信息的传输,通过一个嘈杂的通道,并使用这种类比,以获得最佳的见解,或最合适的,分子识别器。我们专注于分子的最佳结构特性,如灵活性和构象。我们发现,结合时,这往往发生在分子识别过程中的构象变化,可能会优化识别器的检测性能。因此,我们提出了一个通用的设计原则,称为“构象校对”,其中变形增强检测。我们评估的最佳灵活性的分子识别器,这是类似的随机性的决策单元。在某些情况下,灵活的识别器,即,随机决策单元比刚性的、确定性的单元执行得更好。作为一个生物学的例子,我们讨论了同源重组过程中的构象变化,两条DNA链之间的遗传交换过程。

英文摘要:

Molecular recognition, which is essential in processing information in biological systems, takes place in a crowded noisy biochemical environment and requires the recognition of a specific target within a background of various similar competing molecules. We consider molecular recognition as a transmission of information via a noisy channel and use this analogy to gain insights on the optimal, or fittest, molecular recognizer. We focus on the optimal structural properties of the molecules such as flexibility and conformation. We show that conformational changes upon binding, which often occur during molecular recognition, may optimize the detection performance of the recognizer. We thus suggest a generic design principle termed 'conformational proofreading' in which deformation enhances detection. We evaluate the optimal flexibility of the molecular recognizer, which is analogous to the stochasticity in a decision unit. In some scenarios, a flexible recognizer, i.e., a stochastic decision unit, performs better than a rigid, deterministic one. As a biological example, we discuss conformational changes during homologous recombination, the process of genetic exchange between two DNA strands.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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