Co-aggregation of ovotransferrin and lysozyme

Co-aggregation of ovotransferrin and lysozyme
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卵转铁蛋白和溶菌酶的共聚集

DOI:
10.1016/j.foodhyd.2018.11.022
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发表时间:
2019
期刊:
影响因子:
10.7
通讯作者:
Shiraki Kentaro
Shiraki Kentaro
中科院分区:
农林科学1区
文献类型:
--
作者:
Iwashita Kazuki;Handa Akihiro;Shiraki Kentaro

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卵转铁蛋白(OVT)是鸡蛋白色的主要蛋白质成分,由于其高的热敏性而负责初始凝胶化。溶菌酶(LYZ)的共聚集参与了低温下OVT聚集体的形成。不希望的聚集体的形成限制了可应用于蛋白白色产品的热加工程度。然而,OVT和LYZ的共聚集体的特征尚未阐明。在这里,我们确定了OVT和LYZ的蛋白质组成,结构,分子间力和形态的热共聚集过程。无论混合比如何,共聚集体中所涉及的LYZ的量取决于聚集的OVT的量。天然LYZ具有通过非共价缔合沉淀可溶性OVT聚集体的能力。OVT和LYZ的共聚集体形成具有大网络的胶体颗粒,这在由单独的蛋白质组成的系统中没有观察到。OVT和LYZ的分级共聚集开始于OVT与LYZ的非共价聚集,这抑制了可溶性OVT聚集体之间的静电排斥,然后通过可溶性聚集体之间的二硫键交联形成不溶性聚集体。这些结果提供了关于鸡蛋白色的有效巴氏杀菌和热处理的信息。
Ovotransferrin (OVT) is the main protein component of egg white responsible for initial gelation due to its high thermal susceptibility. Co-aggregation of lysozyme (LYZ) is involved in OVT aggregate formation at low temperatures during pasteurization. Undesirable formation of aggregates limits the degree of thermal processing that can be applied to egg white products. However, the characteristics of co-aggregates of OVT and LYZ have not been elucidated. Here, we determined the thermal co-aggregation process of OVT and LYZ in terms of protein composition, structure, intermolecular forces, and morphology. The amount of LYZ involved in co-aggregates was dependent on the amount of aggregated OVT regardless of the mixing ratio. Native LYZ had the capability of precipitating soluble OVT aggregates by non-covalent association. The co-aggregates of OVT and LYZ formed colloidal particles with a large network, which was not observed in systems consisting of either protein alone. The hierarchical co-aggregation of OVT and LYZ started from the aggregation of OVT involving LYZ non-covalently, which suppresses electrostatic repulsion between soluble OVT aggregates, followed by the growth of insoluble aggregates by disulfide bond crosslinkage between the soluble aggregates. These results provide information regarding efficient pasteurization and thermal processing of hen egg white.
DOI: 10.1007/s10930-015-9612-3
发表时间: 2015-06
期刊: PROTEIN JOURNAL
影响因子: 3
作者:
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DOI: 10.1111/j.1365-2621.1981.tb04498.x
发表时间: 1981-01-01
影响因子: 3.9
作者:
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DOI: --
发表时间: 1998
期刊: Bioscience, biotechnology and biochemistry
影响因子: --
作者:
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DOI: --
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DOI: --
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影响因子: --
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