针对脱氧尼瓦伦醇通过化学过氧化酶/谷氨系统降解
Xiaoyun Su1, Shuai Wang2, Xiaolu Wang1
1State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, No. 2 West Yuanmingyuan Road, Haidian District, Beijing 100193, China.
Ecotoxicology and environmental safety
|February 23, 2024
概括
研究人员设计了过氧化酶 (MnP),以有效地降解化 (DON) 在料中. 将一个DON向的融合蛋白与谷氨相结合,显著提高了降解率,克服了木质素干扰.
科学领域:
- 生物技术是生物技术.
- 酵素工程是什么意思 酵素工程
- 食品安全 食品安全
背景情况:
- 过氧化酶 (MnP) 有效地降解了像脱氧尼瓦伦醇 (DON) 这样的真菌毒素.
- 食品和料中的红素干扰MnP的DON降解活动.
- 开发有针对性的酶溶液对于复杂矩阵中的真菌毒素排毒至关重要.
研究的目的:
- 在干扰性木质素的存在下,设计一个过氧化酶 (MnP) 进行高效的脱氧尼瓦醇 (DON) 催化.
- 确定在料样本中克服基于木质素的MnP活性抑制的策略.
- 开发一种使用工程酶降解真菌毒素的多功能平台.
主要方法:
- 通过将其与一种脱氧尼瓦伦醇识别单链可变片段 (ScFv) 融合而改造的Ceriporiopsis subvermispora MnP (CsMnP).
- 确定了谷氨作为一种特定的增强剂,以改善MnP的向和活性.
- 在含有木质素和DON的料矩阵中测试了设计的MnP和增强剂系统.
主要成果:
- 用谷氨增强的工程CsMnP,实现了在料中82.7%的DON降解率.
- 这代表了与最初的2.5%降解率 (没有工程) 相比的显著改善.
- 结合的策略成功克服了红素干扰,使得有效的DON催化.
结论:
- 酶工程,结合蛋白质融合和增强剂补充,可以克服复杂生物系统中的基质竞争.
- 这种方法提供了一种有效的方法,可以在料中排毒脱氧瓦伦醇,并有可能用于其他真菌毒素.
- 开发的战略提供了一个强大的平台,用于为各种排毒挑战创造有针对性的生物催化剂.
相关概念视频
01:21Radical Oxidation of Allylic and Benzylic Alcohols
2.0K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
2.0K
02:37Oxidation of Alcohols
13.1K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
13.1K
02:21Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.5K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.5K
01:17Oxidation of Phenols to Quinones
3.0K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
3.0K