来自haloarchaeon Natrialba sp. 的一种新的素. 菌株PRR66:识别和表征
Xinran Jiang1, Chengyun Wang1, Zhumeihui Ding1
1College of Life Sciences, Anhui Normal University, Wuhu, 241002, Anhui, People's Republic of China.
Biochemical and biophysical research communications
|October 5, 2025
概括
一种新的细胞外蛋白酶hly66已成功克隆和表达. 这种素酶在极端条件下表现出最佳活性和增强的稳定性,使其非常适合工业应用.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 酶学 是一种酶学.
背景情况:
- Haloarchaea 是一种极端友好的微生物,在高盐环境中繁荣发展.
- 来自藻类的细胞外蛋白质酶具有独特的特性,适合工业应用.
- 纳特里亚尔巴 (Natrialba) sp. 这种植物有很多种. 在PRR66中含有编码潜在工业蛋白酶的hly66基因.
研究的目的:
- 克隆和表达来自Natrialba sp.的hly66基因. 在大肠杆菌中的PRR66.
- 描述重组素 (rHLY66) 的酶性质和稳定性.
- 评估rHLY66的潜在工业应用,特别是在盐发酵食品行业.
主要方法:
- 在大肠杆菌中克隆基因和hly66的异质表达.
- 使用阿佐素作为基质进行酶活性测定.
- 确定动力参数 (Km,Vmax,Kcat) 和最佳反应条件 (温度,pH,NaCl度).
- 评估酶稳定性和低盐适应性.
主要成果:
- hly66基因被成功克隆和表达,产生了重组蛋白MBP-Hly66 (rHLY66).
- rHLY66在60°C,pH值9.0和4.0M NaCl时表现出最大活性,表明具有和性质.
- 确定了动力参数:Km = 1.79 mM,Vmax = 751.28 U/mg,以及Kcat = 1502.56 S-1.1. 这些参数为:
- 与传统的素相比,rHLY66表现出增强的稳定性和显著的低盐适应性.
结论:
- 重组哈洛辛rHLY66具有独特的酶特性,包括高温,高盐度和性最佳.
- rHLY66表现出显著的稳定性和适应性低盐条件,扩大了其适用性.
- 这种酶在盐发酵食品工业和其他专业工业过程中具有广泛的应用潜力.
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