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使用全基因组关联分析探索Lactobacillus helveticus菌株化大豆蛋白的遗传信息
Zengbo Wang1, Junwu Cai2, Bailiang Li2
1State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang), Nanchang University, Nanchang 330047, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China; Food College, Northeast Agricultural University, Harbin 150030, China.
International journal of food microbiology
|April 23, 2025
概括
对Lactobacillus helveticus的基因分析揭示了影响大豆蛋白质水解的两个关键基因突变. 这一发现有助于为改进的基于大豆的发酵乳制品替代品选择菌株.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 生物化学 生物化学
背景情况:
- 与牛奶蛋白相比,豆蛋白在发酵过程中被乳酸细菌 (LAB) 代谢效率较低.
- 关于LAB对大豆蛋白质的水解存在有限的遗传数据.
研究的目的:
- 为了研究影响大豆蛋白在Lactobacillus helveticus (L. helveticus) 的水解的遗传因素.
- 确定在L. helveticus菌株中对大豆蛋白水解活性差异负责的特定遗传变异.
主要方法:
- 46个L. helveticus菌株的基因组测序.
- 全基因组关联分析 (GWAS) 用于识别与水解活动相关的遗传标记.
- 酶测试验证识别突变的功能影响.
主要成果:
- 没有发现大豆蛋白水解与隔离源,地理来源或蛋白酶,载体和酶基因分布之间的相关性.
- 两个错误的SNP (SNP-482062和SNP-1780770) 与大豆蛋白水解有显著的关联.
- 这些SNP分别改变了氨基酸浸透酶和鸟脱碳酶的三级结构和活性.
结论:
- 这项研究阐明了L. helveticus.不同大豆蛋白水解能力的遗传基础.
- 鉴定的遗传变异为选择强壮菌株提供了基础,用于开发基于大豆的发酵产品.
- 这项研究为食品行业提供了实际见解,以增强基于大豆的发酵乳制品替代品.
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