相关实验视频

Updated: May 23, 2025

X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050

X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050

Published on: May 13, 2020

来自Mycobacterium结核病菌的S-adenosylmethionine依赖的酸合成酶UmaA的晶体结构

Sean Teng¹, Jie Wang¹, Collin D Sroge²

¹Department of Biology, Washington University in St Louis, St Louis, MO 63134, USA.

Acta crystallographica. Section F, Structural biology communications

|March 10, 2025

概括

研究人员阐明了UmaA的晶体结构,UmaA是Mycobacterium结核病细胞壁合成中的关键酶. 这种结构性洞察力揭示了开发抗多药耐药结核病药物的潜在新策略.

科学领域:

生物化学生物化学
结构生物学结构生物学
微生物学微生物学

背景情况:

结核菌导致结核病,这是全球主要的死亡原因,由多药性耐药性加剧.
酸对M.结核病细胞壁的完整性,毒性和持久性至关重要.
依赖S-adenosylmethionine的酸合成酶是有前途的药物标,而UmaA是最不了解的.

研究的目的:

为了确定UmaA酶的晶体结构.
了解UMAA功能的结构基础,并识别潜在的药物点.

主要方法:

使用X射线晶体学来确定UmaA.的三维结构.
进行了生物信息分析和结构比较.
进行了体外测试,以调查酶活性和抑制.

主要成果:

UmaA的晶体结构揭示了一个具有两个不同的域的单体蛋白质:一个保存的S-adenosylmethionine (SAM) 结合域和一个可变的基质结合辅助域.
在活性位点观察到一个酸盐离子,模仿碳酸盐,并暗示在循环添加合成酶中作为一般基的作用.
发现UmaA的N端是高度灵活的.
S-adenosyl-N-decyl-aminoethyl被确定为UmaA的潜在抑制剂.

结论:

确定的晶体结构为UmaA的机制及其在酸生物合成中的作用提供了关键的见解.
鉴定一种潜在的抑制剂为开发新型抗结核疗法提供了一个有希望的途径.
针对UmaA可能是一个可行的策略,以对抗多药耐药的M.结核病感染.

关键词:

结核病菌菌菌的结核病菌的结核病菌.在S-adenosylmethionine依赖的甲基转移酶中.这是一种SAM依赖的酸合成酶.西雅图结构基因组学传染病中心.一个人的心,一个人的心.短链脂肪酸修饰的短链脂肪酸修饰结构基因组学是结构基因组学.

更多相关视频

Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092

Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092

Published on: October 2, 2017

From Constructs to Crystals – Towards Structure Determination of β-barrel Outer Membrane Proteins

From Constructs to Crystals – Towards Structure Determination of β-barrel Outer Membrane Proteins

Published on: July 4, 2016

相关概念视频

ATP Synthase: Structure

ATP Synthase: Structure

ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...

Allosteric Proteins-ATCase

Allosteric Proteins-ATCase

Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...

ATP Synthase: Mechanism

ATP Synthase: Mechanism

In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...