食品科学 ›› 2009, Vol. 30 ›› Issue (24 ): 416-418.doi: 10.7506/spkx1002-6630-200924095

• 分析检测 • 上一篇    下一篇

SDS 结合法测定蛋白质的疏水性

耿玮蔚,杨 光﹡,谢欣怡,杨 波   

  1. 上海理工大学医疗器械与食品学院
  • 收稿日期:2009-08-24 出版日期:2009-12-15 发布日期:2010-12-29
  • 通讯作者: 杨 光﹡ E-mail:yangguang@usst.edu.cn
  • 基金资助:

    上海市科技攻关重点项目(08521102000);上海市自然科学基金项目(08ZR1415200)

Determination of Protein Hydrophobicity by Sodium Dodecyl Sulfate Binding Method

GENG Wei-wei,YANG Guang*,XIE Xin-yi,YANG Bo   

  1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2009-08-24 Online:2009-12-15 Published:2010-12-29
  • Contact: YANG Guang*, E-mail:yangguang@usst.edu.cn

摘要:

SDS(sodium dodecyl sulfate,十二烷基磺酸钠)与蛋白质溶液混合,在一定浓度和pH 值的缓冲液中透析一段时间后,用Epton's 方法测SDS 含量,通过标准曲线读出蛋白质结合的SDS 数量。得到最佳测定条件为透析时间24h、温度30℃、SDS 溶液40ml、缓冲液pH8。并且将SDS 结合法与荧光探针法相比较,结果表明这两种方法具有较好的相关性。

关键词: 蛋白质, 疏水性, SDS 结合法, 透析

Abstract:

In this study, binding capacity between sodium dodecyl sulfate (SDS) and protein was used to evaluate protein hydrophobicity. SDS and protein were mixed in a buffer with certain concentration and pH. Followed by dialysis of the SDSprotein mixture, the bound SDS was determined through Epton s method. The optimal determination condition was achieved to be 24 h of dialysis, 30 ℃ of dialysis temperature, 40 ml of SDS solution and pH 8. Compared with fluorescence probe method, the SDS binding method exhibited a good correlation with it.

Key words: protein, hydrophobicity, SDS-binding method, dialysis

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