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Oligoethylene Glycols Prevent Thermal Aggregation of α-Chymotrypsin in a Temperature-Dependent Manner: Implications for Design Guidelines

机译:低聚乙二醇可防止α-胰凝乳蛋白酶以温度依赖性方式热聚集:对设计指南的影响

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摘要

Protein aggregation is problematic in various fields, where aggregation can frequently occur during routine experiments. This study showed that tetraethylene glycol (TEG) and tet-raethylene glycol dimethyl ether (TEGDE) act as aggregation suppressors that have different unique properties from typical additives to prevent protein aggregation, such as arginine (Arg) and NaCl. Thermal aggregation of a-chymotrypsin was well suppressed with the addition of both TEG and TEGDE. Interestingly, the suppressive effects of Arg and NaCl on thermal aggregation were almost unchanged when temperature was shifted from 65°C to 85°C, whereas both TEG and TEGDE significantly decreased the aggregation rate with increasing temperature. Note that the effects of TEG and TEGDE were higher than Arg above 75°C. This temperature-dependent behavior of TEG and TEGDE provides a novel design guideline to develop aggregation suppressors for use at high temperature, i.e., the importance of the ethylene oxide group.
机译:蛋白质聚集在各个领域都存在问题,在常规实验中聚集经常发生。这项研究表明,四乙二醇(TEG)和四叔丁基乙二醇二甲醚(TEGDE)起到聚集抑制剂的作用,与典型的防止蛋白质聚集的添加剂(例如精氨酸(Arg)和NaCl)具有不同的独特特性。加入TEG和TEGDE可以很好地抑制α-胰凝乳蛋白酶的热聚集。有趣的是,当温度从65°C转变为85°C时,Arg和NaCl对热聚集的抑制作用几乎没有改变,而TEG和TEGDE都随着温度的升高而显着降低聚集速率。请注意,在温度高于75°C时,TEG和TEGDE的作用高于Arg。 TEG和TEGDE的这种温度依赖性行为为开发用于高温的聚集抑制剂(即环氧乙烷基团的重要性)提供了新颖的设计指南。

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