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Theoretical modeling of the kinetics of fibrilar aggregation of bovine beta-lactoglobulin at pH 2

机译:pH 2下牛β-乳球蛋白的纤维状聚集动力学的理论模型

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The authors propose a kinetic model for the heat-induced fibrilar aggregation of bovine beta-lactoglobulin at pH 2.0.The model involves a nucleation step and a simple addition reaction for the growth of the fibrils,as well as a side reaction leading to the irreversible denaturation and inactivation of a part of the protein molecules.For the early stages of the aggregation reaction,the authors obtain an analytical solution of the model.In agreement with their experimental results,the model predicts a critical protein concentration below where almost no fibrils are formed.The model agrees well with their experimental data from in situ light scattering.By fitting the experimental data with the model,the authors obtain the ionic strength dependent kinetic rate constants for beta-lactoglobulin fibrilar aggregation and the size of the critical nucleus.
机译:作者提出了在pH 2.0下热诱导牛β-乳球蛋白的纤维状聚集的动力学模型,该模型涉及成核步骤和简单的加成反应,以促进纤维的生长,以及导致不可逆的副反应。一部分蛋白质分子发生变性和失活。对于聚集反应的早期阶段,作者获得了该模型的解析溶液。与他们的实验结果一致,该模型预测了临界蛋白浓度,在该浓度下几乎没有原纤维存在。该模型与原位光散射的实验数据非常吻合。通过将实验数据与模型拟合,作者获得了离子强度依赖的β-乳球蛋白纤维状聚集的动力学速率常数和临界核的大小。

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