在Bacillus subtilis子上显示细菌异花酶,提高了酶的稳定性和可回收性
Mati Ullah1, Yutong Xia1, Dalal Sulaiman Alshaya2
1School of Life Sciences, Jiangsu University, Zhenjiang 212013, China.
Molecules (Basel, Switzerland)
|September 28, 2024
概括
来自Paenibacillus barengoltzii在Bacillus subtilis子上固定化的重组表皮酶显示出高稳定性和活性. 这种固定酶表现出极好的可回收性,为工业应用铺平了道路.
科学领域:
- 生物技术是生物技术.
- 酶学 是一种酶学.
- 微生物工程 微生物工程
背景情况:
- 是一种丰富的天然多糖,仅次于纤维素.
- 基的降解产生具有宝贵生物特性的氨基糖.
- 酸酶的高效生产对于酸的分解和利用至关重要.
研究的目的:
- 从Paenibacillus barengoltzii.zii中再组合地产生和固定出异酶PbChiA.
- 为了提高固定酶的稳定性和活性,使用Bacillus subtilis WB800N子.
- 评估酶的性能,包括活性,稳定性和可回收性.
主要方法:
- 再组合产生的表皮酶 PbChiA.
- 酶被固定在Bacillus subtilis WB800N子的CotG表面蛋白上.
- 测试溶性活性和评估在不同的pH值和温度条件下的稳定性.
- 研究金属离子和EDTA对酶活性的影响.
- 在多个循环中评估固定酶的可回收性.
主要成果:
- 固定化的异激酶在各种pH水平上表现出高热稳定性和有效性.
- 固定化的酶的奇丁分解活性达到了大约16.06 U/mL.
- 由Ni2+,Zn+2,K+和EDTA显著增强了酶活性.
- 固定化的酶在三次循环后保持了70%以上的活性,在四次循环后保持了62.7%.
结论:
- 在 Bacillus subtilis 子上固定化的外基酶 PbChiA 显示出卓越的稳定性和可回收性.
- 该酶的活性可以通过特定的金属离子和EDTA进行调节.
- 这项研究为不动化的细菌外基因酶的工业应用提供了基础.
相关概念视频
Endospores and Sporulation
6.8K
Endospores are specialized, dormant cells primarily formed by Gram-positive bacteria, including Bacillus and Clostridium, enabling survival under extreme environmental conditions. Due to their unique composition and formation process, these structures are highly resistant to physical and chemical insults, such as extreme heat, ultraviolet and ionizing radiation, desiccation, and toxic chemicals. Rare instances of endospore-like structures have also been observed in some Gram-negative bacteria,...
6.8K
Production of Biopesticides
120
Biopesticides offer a sustainable alternative to chemical pesticides, utilizing microbial agents to control agricultural pests. Bacillus thuringiensis (Bt) is a widely employed bacterium known for its potent insecticidal activity. Bt biopesticides are favored for their specificity to insect pests, minimal environmental impact, and natural degradability.Mechanism of Bt Toxin Action Bt produces insecticidal crystal (Cry) proteins during its sporulation phase. These proteins form parasporal...
120
Microbial Bioremediation of Plastics
142
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
142


