Wheat Gluten, Gliadins and Glutenin Content Changes During Germination Based on the Methods of R5 ELISA and RP-HPLC
HU HuiMin, PAN XueFeng, YANG Heng, CHEN Chen, CHEN YinJi,College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210023
Abstract 【Objective】 The current study was conducted to determine the dynamic changes of gluten, gliadins and glutenin contents in different germination states of wheat, so as to provide a scientific basis for the development of gluten-free food and utilization of germinated wheat. 【Method】Seven wheat grains with different germination states were obtained by controlling the germination conditions. Changes of composition of gliadins and glutenin were analyzed by sodium dedecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), and changes of gluten, gliadins and glutenin subunits during wheat germination were further determined by enzyme-linked immunosorbent assay based on R5 antibody (R5 ELISA) and reversed-phase high-performance liquid chromatography (RP-HPLC). 【Result】The content of gluten, gliadins and glutenin subunits in wheat could be determined by R5 ELISA and RP-HPLC. Germination treatment had different effects on the allergic proteins and subunits mentioned above. The content of gluten changed little at the early stage of germination, but decreased significantly at the later stage. The relative content of ω-gliadins did not change significantly. During the germination process, the relative content of α-/β-gliadins was significantly reduced, with the percentage of untreated wheat seeds decreased from 41.85% to 31.51%-35.35% after germination (P<0.01). The relative content of γ-gliadins increased significantly from 31.37% to 36.69%-39.02% after germination (P<0.05). The relative content changes of high molecular weight glutenin subunit (HMW-GS) and low molecular weight glutenin subunit (LMW-GS) were not significant. HMW-GS decreased slightly from 8.66% (untreated group) to 5.94% (1/4 bud length) and then to 7.28% (bud length=grain length). LMW-GS increased slightly from 8.30% (untreated group) to 10.45% (bud length=grain length).【Conclusion】Both of the methods R5 ELISA and RP-HPLC could be used for quantitative analysis of wheat sensitized proteins. The content of allergenic protein in wheat decreased during germination. In particular, when the germinating bud was up to 1/2 long, the α-/β-gliadin which containing the most sensitive peptide decreased significantly. It was suggested that moderate germination treatment could reduce sensitization of wheat. Keywords:celiac disease;gliadin;glutenin;gluten;R5 ELISA;RP-HPLC
PDF (1822KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 胡慧敏, 潘雪峰, 杨恒, 陈晨, 陈银基. 基于R5 ELISA和RP-HPLC法的小麦发芽过程中主要致敏蛋白含量变化[J]. 中国农业科学, 2020, 53(6): 1247-1255 doi:10.3864/j.issn.0578-1752.2020.06.016 HU HuiMin, PAN XueFeng, YANG Heng, CHEN Chen, CHEN YinJi. Wheat Gluten, Gliadins and Glutenin Content Changes During Germination Based on the Methods of R5 ELISA and RP-HPLC[J]. Scientia Acricultura Sinica, 2020, 53(6): 1247-1255 doi:10.3864/j.issn.0578-1752.2020.06.016
Table 1 表1 表1不同发芽状态小麦中醇溶蛋白和谷蛋白相对含量(%) Table 1Relative amounts of gliadins and glutenin from wheat in different germination state (%)
亚基 Subunit
发芽状态Germination state
A
B
C
D
E
F
G
ω
9.48±1.06a
9.81±0.40a
9.69±0.84a
11.30±1.00a
10.20±0.37a
12.03±0.47a
10.57±0.88a
α+β
41.85±0.63A
33.81±1.65B
34.36±1.83B
35.35±0.77B
33.19±1.35B
31.51±0.32B
33.52±0.77B
γ
31.37±0.76a
36.69±0.37b
39.02±1.04b
37.62±2.40b
38.70±2.27b
37.28±1.29b
36.91±1.10b
HMW
8.66±0.61a
8.98±1.33a
8.12±1.11a
6.32±1.15a
5.94±0.34a
8.00±0.20a
7.28±0.19a
LMW
8.30±0.74a
9.80±0.61a
8.81±0.40a
8.73±0.80a
10.13±1.03a
10.49±0.33a
10.45±0.43a
The lowercase letters indicate significant differences at 0.05 level, and the capital letters indicate significant differences at 0.01 level 表中小写字母表示在0.05水平差异显著,大写字母表示在0.01水平差异显著
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