微波处理条件对蛋清结构和IgG结合能力的影响
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国家重点研发计划项目(2018YFD0400304)和国家自然科学基金项目(31660436)


Effects of Microwave Treatment on Structure of Egg White and IgG Binding Capacity
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    摘要:

    为探究降低蛋清致敏性的新方法,在不同的微波条件下处理蛋清蛋白,通过SDS-PAGE(十二烷基磺酸钠-聚丙烯酰氨凝胶电泳)分析分子量变化、圆二色光谱分析二级结构变化、紫外光谱分析三级结构变化、外源性荧光光谱分析疏水性变化、间接ELISA(酶联免疫吸附试验)分析IgG(免疫球蛋白G)结合能力的变化,研究微波对蛋清的影响。研究证实,微波处理降低蛋清蛋白的潜在致敏性,其中400W/30s处理后的蛋白显示出最低的IgG结合能力,所有条件下处理后的蛋清蛋白的二、三级结构均发生显著改变。80W的微波功率下,蛋白质的结构先折叠,该条件下处理30s后,蛋白结构又展开;当微波功率达到640W时,处理时间较长的蛋白分子产生堆叠。蛋白质分子的结构变化导致了其抗原性的变化。

    Abstract:

    Aiming to explore a new way to reduce the allergenicity of egg allergens. The influence of different microwave treatments on egg white was demonstrated by SDS-PAGE, circular dichroism spectroscopy, ultraviolet spectroscopy, exogenous fluorescence spectroscopy and indirect ELISA to analyze molecular weight changes, secondary structure, tertiary structure, hydrophobic changes and changes in IgG binding capacity, respectively. Results showed that the microwave treatment reduced the potential allergenicity of egg white proteins, and the IgG binding capacity of egg white was the lowest when it was treated under 400W for 30s. The secondary and tertiary structure of protein were obviously changed by microwave treatment. Under 80W, the structure of egg white proteins was folded, however, when treatment time was more than 30s, the structure of egg white proteins was unfolded again. When the power of microwave treatment was increased to 640W, part of egg white proteins was aggregated. Changes in the structure could induce changes in potential allergenicity of egg white proteins, however, the relationship of structure and potential allergenicity of egg white proteins under microwave treatment should be further analyzed.

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陈红兵,杨皞,高金燕,佟平.微波处理条件对蛋清结构和IgG结合能力的影响[J].农业机械学报,2019,50(7):355-361. CHEN Hongbing, YANG Hao, GAO Jinyan, TONG Ping. Effects of Microwave Treatment on Structure of Egg White and IgG Binding Capacity[J]. Transactions of the Chinese Society for Agricultural Machinery,2019,50(7):355-361.

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  • 收稿日期:2019-01-05
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  • 在线发布日期: 2019-07-10
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