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Cold denaturation as a tool to measure protein stability

机译:冷变性作为测量蛋白质稳定性的工具

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摘要

Protein stability is an important issue for the interpretation of a wide variety of biological problems but its assessment is at times difficult. The most common parameter employed to describe protein stability is the temperature of melting, at which the populations of folded and unfolded species are identical. This parameter may yield ambiguous results. It would always be preferable to measure the whole stability curve. The calculation of this curve is greatly facilitated whenever it is possible to observe cold denaturation. Using Yfh1, one of the few proteins whose cold denaturation occurs at neutral pH and low ionic strength, we could measure the variation of its full stability curve under several environmental conditions. Here we show the advantages of gauging stability as a function of external variables using stability curves.
机译:蛋白质稳定性是解释各种生物问题的重要问题,但其评估有时困难。 用于描述蛋白质稳定性的最常见的参数是熔化的温度,折叠和展开物种的群体是相同的。 该参数可以产生模糊的结果。 测量整个稳定性曲线总是最好的。 每当可以观察冷变性时,极大地促进了这种曲线的计算。 使用YFH1,少数蛋白质之一,其冷变性在中性pH和低离子强度下发生,我们可以在几个环境条件下测量其完全稳定性曲线的变化。 在这里,我们展示了使用稳定性曲线的外部变量的函数测量稳定性的优点。

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