两种不同类型的化酶在一个高效的降解菌株Lysobacter sp.中共同降解甲氨酸A. 在CW239中使用
Xiaojie Fu1, Qingru Fei1, Xuanjun Zhang1
1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Heifei 230036, China.
Journal of hazardous materials
|May 26, 2024
概括
一种新型酶amidohydrolaseADH2能够有效地降解食物污染物的Ochratoxin A (OTA). 这种酶与碳氧化酶CP4一起,为控制农产品中的OTA提供了一种协同方法.
科学领域:
- 微生物学 微生物学
- 食品科学 食品科学 食品科学
- 生物化学 生化学
背景情况:
- 毒素A (OTA) 是一种普遍存在的菌毒素,会污染农产品,对健康构成重大风险.
- 之前的研究已经在Lysobacter sp.中确定了carboxypeptidase CP4. CW239用于OTA降解,但效率有限.
研究的目的:
- 选和表征新型酶,以实现高效的Ochratoxin A水解.
- 阐明Lysobacter sp.中的酶对OTA的协同降解机制. 在CW239.9.
主要方法:
- 对Lysobacter sp.进行查. CW239用于OTA-化酶.
- 鉴定到的氨基基酶ADH2.2的生物化学特征.
- 基因突变 (Δcp4, Δadh2, Δcp4-adh2) 的构建和分析,以确定酶作用.
主要成果:
- 阿米多酶ADH2证明了OTA的超高效降解 (50μg/L在5分钟内降解为1.0μg/mLrADH2).
- CP4和ADH2都将OTA转化为甲酸α (OTα) 和l-β-氨.
- 基因删除研究证实CP4和ADH2是CW239菌株中OTA共降解的唯一原因,ADH2是主要酶.
结论:
- 与之前识别的酶相比,阿米多酶ADH2在奥克拉托辛A降解方面表现出更高的效率.
- 碳氧化酶CP4和氨基化酶ADH2协同作用,在Lysobacter sp.中有效地进行OTA解毒. 在CW239.9.
- 这些发现为制定控制农产品中Ochratoxin A污染的战略提供了基础.
相关概念视频
01:15Hydrolysis
105.0K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
105.0K
02:37Oxidation of Alcohols
13.0K
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:
13.0K
01:46Oxidative Cleavage of Alkenes: Ozonolysis
10.3K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.3K
01:15Oxidations of Aldehydes and Ketones to Carboxylic Acids
3.8K
Oxidation of aldehydes and ketones results in the formation of carboxylic acids. Aldehydes, bearing hydrogen next to the carbonyl group, are easily oxidized compared to ketones. This is because an aldehydic proton can easily be abstracted during oxidation.
Aldehydes readily undergo oxidation in strong oxidizing agents such as potassium permanganate and chromic acid. The oxidation can also be carried out using mild oxidizing agents such as silver oxide. In fact, aldehydes can be easily oxidized...
Aldehydes readily undergo oxidation in strong oxidizing agents such as potassium permanganate and chromic acid. The oxidation can also be carried out using mild oxidizing agents such as silver oxide. In fact, aldehydes can be easily oxidized...
3.8K