结构和基质特异性S-甲基 thiourocanate 酸酶
Camille M Vasseur1, Dishani Karunasegaram1, Florian P Seebeck1
1Department of Chemistry, University of Basel, BPR 1096, Mattenstrasse 22, Basel 4002, Switzerland.
ACS chemical biology
|February 23, 2024
概括
研究人员发现了一种新酶,S-甲基 thiourocanate hydratase (S-Me-TUC),它使用尼古丁胺胺氨基二核酸 (NAD +) 进行异常的催化反应. 这一发现揭示了酶的进化和潜在的新型酶设计.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 结构生物学 结构生物学
背景情况:
- 尼古丁胺胺氨基二核酸 (NAD+) 通常在化物转移反应中充当辅因子.
- 乌洛卡纳酶和相关酶独特地使用NAD+进行共价电友性催化.
- 了解这种不寻常的催化策略的演变,可以为新的酶设计提供信息.
研究的目的:
- 为了识别和表征新的NAD+依赖性酸酶.
- 阐明S-甲基 thiourocanate 酸酶 (S-Me-TUC) 的催化机制和基质特异性.
- 探索S-甲基化在欧戈氨酸代谢中的生物学意义.
主要方法:
- 从Variovorax sp.发现和净化酶. 在RA8.8中,我们可以看到RA8.
- 生物化学测试以确定酶活性和基质范围.
- X射线晶体学以确定酶-辅因子-产品模拟复杂结构.
主要成果:
- 鉴定S-甲基 thiourocanate 酸酶 (S-Me-TUC) 是一种新的NAD+ 依赖酸酶.
- S-Me-TUC催化了S-甲基硫酸的水化,这是S-甲基欧戈氨酸代谢的一个关键步骤.
- 晶体结构揭示了关键的动机,解释了相关水解酶的基质特异性.
- 发现了一种新的S-甲基欧戈氨酸代谢途径.
结论:
- S-Me-TUC代表了NAD+依赖酸酶家族的新成员,扩大了我们对异常辅因子利用的知识.
- 结构洞察力为理解和工程酶基质特异性提供了基础.
- 鉴定的途径突出显示了S-甲基化在欧戈胺生物学的潜在重要性.
相关概念视频
02:34Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
8.4K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
8.4K
02:34Enzymes
81.5K
Inside living organisms, enzymes act as catalysts for many biochemical reactions involved in cellular metabolism. The role of enzymes is to reduce the activation energies of biochemical reactions by forming complexes with its substrates. The lowering of activation energies favor an increase in the rates of biochemical reactions.
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
81.5K
02:33Preparation and Reactions of Thiols
6.2K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
6.2K
02:26Preparation and Reactions of Sulfides
4.8K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
4.8K
02:36Regioselectivity and Stereochemistry of Hydroboration
8.1K
A significant aspect of hydroboration–oxidation is the regio- and stereochemical outcome of the reaction.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
8.1K
02:40Alkynes to Aldehydes and Ketones: Acid-Catalyzed Hydration
8.4K
Introduction
Analogous to alkenes, alkynes also undergo acid-catalyzed hydration. While the addition of water to an alkene gives an alcohol, hydration of alkynes produces different products such as aldehydes and ketones.
Analogous to alkenes, alkynes also undergo acid-catalyzed hydration. While the addition of water to an alkene gives an alcohol, hydration of alkynes produces different products such as aldehydes and ketones.
8.4K