吉林大学学报(理学版)

• 生命科学 • 上一篇    下一篇

大豆球蛋白的红外和Raman光谱分析

龙国徽1, 纪媛2, 潘洪斌3,4, 孙泽威4, 王锦欣1, 秦贵信4   

  1. 1. 吉林农业大学 生命科学学院, 长春130118; 2. 吉林大学 物理学院, 长春 130012; 3. 云南农业大学云南省动物营养与饲料重点实验室, 昆明 650201; 4. 吉林农业大学 动物科学技术学院, 长春 130118
  • 收稿日期:2013-10-15 出版日期:2014-07-26 发布日期:2014-09-26
  • 通讯作者: 秦贵信 E-mail:qgx2013@sohu.com

Analysis of Soy Glycinin by FTIR and Raman Spectroscopy

LONG Guohui1, JI Yuan2, PAN Hongbin3,4, SUN Zewei4, WANG Jinxin1, QIN Guixin4   

  1. 1. College of Life Science, Jilin Agricultural University, Changchun 130118, China; 2. College of Physics, Jilin University, Changchun 130012, China; 3. Key Laboratory of Animal Nutritionand Feed of Yunnan Province, Yunan Agricultural University, Kunming 650201, China;4. College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
  • Received:2013-10-15 Online:2014-07-26 Published:2014-09-26
  • Contact: QIN Guixin E-mail:qgx2013@sohu.com

摘要:

利用Fourier变换红外光谱(FTIR)和激光Raman光谱研究大豆球蛋白的结构, 并对大豆球蛋白的红外光谱和Raman光谱的特征峰进行指认, 计算Raman费米共振\%I\%850/830的比值. 结果表明: 红外光谱和Raman光谱的酰胺Ⅰ带去卷积和曲线拟合获得二级结构, 其中β折叠结果差异较小, α螺旋、 β转角和
无规卷曲结果差异较大(p<0.05); 红外光谱在1 618,1 682 cm-1处的吸收峰归属于大豆球蛋白的分子间和分子内聚集, 拟合峰面积百分数分别为11.1%和9.5%; 包埋和外露的酪氨酸残基占酪氨酸残基总量的14%和86%.

关键词: 红外光谱, Raman光谱, 大豆球蛋白, 分子结构

Abstract:

The molecular structure of glycinin was investigated by FTIR and Raman spectroscopy. The frequency and signal intensity of IR and Raman bands were assigned. The data suggest that FTIR and Raman spectra reflect a large amount of structural information. The secondary structure of glycinin was ass
essed by the deconvolution amide Ⅰ band and curvefitting. Quantitative analysis of secondary structure reveals that the results of the folded glycinin β
sheet had no significant difference, while the glycinin αhelix, turning angle, random coil had significant difference (\%p\%<0.05). The IR bands at 
1 618 cm-1 and 1 682 cm-1 were considered to reflect the formation of intermolecular aggregates (11.1%) and intramolecular aggregates (
9.5%). The \%I\%850/830 intensity ratio of Raman tyrosine doublet suggests that the contents of the buried tyrosine residue and exposed tyrosine residue were 14% and 86% in glycinin.

Key words: molecular structure, FTIR, Raman spectroscopy, glycinin

中图分类号: 

  • Q512