哈尔干香肠中的Staphylococcus saprophyticus蛋白酶的发酵潜力:蛋白质水解,风味分析和分子对接
Yuhang Fan1, Fangda Sun1, Qian Chen1
1College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
Meat science
|December 30, 2025
概括
葡萄球菌saprophyticus蛋白酶通过修改蛋白质结构和增加有益的代谢物来增强干香肠发酵和风味. 这种蛋白质酶的添加比直接的细菌注射更有效地提高了香肠的质量.
科学领域:
- 食品科学与技术 食品科学与技术
- 微生物学 微生物学
- 生物化学 生物化学
背景情况:
- 传统的干香肠发酵依赖于微生物活动来产生味道和质地.
- 了解特定的酶贡献,如Staphylococcus saprophyticus蛋白酶,对于优化生产至关重要.
- 目前的方法可能无法充分利用酶的潜力来提高产品质量.
研究的目的:
- 调查哈尔干香肠中Staphylococcus saprophyticus蛋白酶的发酵潜力和风味形成机制.
- 阐明这种蛋白酶对香肠蛋白质结构,代谢物概况和挥发性化合物的影响.
- 确定Staphylococcus saprophyticus蛋白酶的最佳度,以提高香肠的质量.
主要方法:
- 综合代谢学,气色谱-质谱 (GC-MS) 和分子对接.
- 凝电泳和富里埃变换红外光谱 (FTIR) 用于蛋白质结构分析.
- 对差异性代谢物,挥发性化合物,pH值,水活动,剪切力和感觉评估的分析.
主要成果:
- 蛋白酶治疗显著改变了蛋白质带强度和二次结构 (例如,增加了α-螺旋环).
- 鉴定了325种不同的代谢物和9种关键的挥发性化合物,具有增加的味道,氨基酸,酸,和.
- 优化的蛋白酶添加 (1.6 g/kg) 显著改善了pH,水活性,剪切力和感官得分,超过了直接注射.
结论:
- 葡萄球菌saprophyticus蛋白酶有效调节蛋白质结构,并增强干香肠中的风味化合物形成.
- 蛋白酶促进了理想的代谢途径,有助于改善味道和香味的特征.
- 与直接微生物接种相比,酶添加提供了一种优越的质量提升方法.
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