反向蛋白解由在位生成的 Ester 片段促进
Nicole Wehofsky1, Norman Koglin, Sven Thust
1Max-Planck Society, Research Unit for Enzymology of Protein Folding, Weinbergweg 22, D-06120 Halle/Saale, Germany.
Journal of the American Chemical Society
|June 6, 2003
概括
本研究介绍了一种一般的合成概念,用于制备使用甲基硫的蛋白酶特异反应剂. 这些前体能够有效地在位子基质模拟制备蛋白酶介导的合成.
科学领域:
- 生物催化和合成
- 有机化学 有机化学
- 酶学 是一种酶学.
背景情况:
- 蛋白酶介导的合成需要特定的反应剂.
- 现有的制备这些反应物的方法可能很复杂或效率低下.
- 甲基 thioesters 提供了作为联的多功能前体的潜力.
研究的目的:
- 介绍一种一般合成概念,用于在现场制备蛋白酶特异反应剂.
- 为了利用甲基 thioesters 为酶性合成的通用前体.
- 开发一种用于生成基质模拟剂的方法,用于增强蛋白酶介导反应.
主要方法:
- 甲基 thioesters 被用作蛋白酶特定反应物的通用前体.
- 用于现场基质模拟制备,采用了一自发的转化化反应.
- 模型合成使用素,alpha-chymotrypsin和V8蛋白酶进行.
主要成果:
- 甲基 thioesters 已成功地直接作为反应剂用于蛋白酶介导的联.
- 在现场通过 transthioesterification 准备基质模拟物得到了高效的实现.
- 合成的基质模仿剂作为有效的乙捐赠剂,使不可逆转的反应成为可能.
- 这种方法证明了与固相 Ester 合成的兼容性.
结论:
- 通过使用甲基 thioesters 的蛋白酶特异反应剂建立了一个通用和高效的合成概念.
- 基质模拟物的现场制备简化了蛋白酶介导的合成.
- 这种方法在生物催化化学中提供了合成价值和广泛的应用.
相关概念视频
Phosphodiester Linkages
Overview
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
Mismatch Repair
Overview
DNA Replication
DNA replication involves the separation of the two strands of the double helix, with each strand serving as a template from which the new complementary strand is copied. After replication, each double-stranded DNA includes one parental or “old” strand and one “new” strand. This is known as semiconservative replication. The resulting DNA molecules have the same sequence and are divided equally into the two daughter cells.
Replication in Prokaryotes
DNA replication uses a large number of...
Replication in Prokaryotes
DNA replication uses a large number of...
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis
Hydrolysis of esters under acidic conditions proceeds through a nucleophilic acyl substitution. In the presence of excess water, the reaction proceeds in a reversible manner, forming carboxylic acids and alcohols.
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
Esters to β-Ketoesters: Claisen Condensation Mechanism
Regular Claisen condensation involves the synthesis of β-ketoesters by combining identical ester molecules bearing two α hydrogens in the presence of an alkoxide base. The reaction commences with the deprotonation of the acidic α hydrogen by the base to form a resonance stabilized ester enolate. This nucleophilic ion then attacks the carbonyl center of another ester molecule to generate a tetrahedral alkoxide intermediate. Next, the expulsion of the alkoxide group from the intermediate restores...
Mismatch Repair
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...


