菌因诺辛5'-单酸脱酸酶八聚化接口的合规景观
Ondřej Bulvas1, Zdeněk Knejzlík1, Anatolij Filimoněnko1
1Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic.
Journal of structural biology
|March 19, 2025
概括
来自Mycobacterium smegmatis的因诺辛5'-单酸脱酶 (IMPDH) 的结构洞察力揭示了基质诱导的构造变化和一种新的八化接口. 这些发现提升了对细菌纯素代谢和抗菌药物点的理解.
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:
- 伊诺辛5'-单酸脱酶 (IMPDH) 对细菌纯素代谢至关重要,也是一个有前途的抗菌药物标.
- 了解IMPDH的结构动态和基质相互作用对于药物开发至关重要.
研究的目的:
- 阐明Mycobacterium smegmatis IMPDH (MsmIMPDH) 中基质诱导的形状变化的结构基础.
- 描述MsmIMPDH的octameric组件和新型交互接口.
主要方法:
- 使用冷电子显微镜 (cryo-EM) 来确定MsmIMPDH.的全长结构.
- 结构分析侧重于反应中间状态和基质结合.
主要成果:
- 确定了协调基质,辅因子和K+离子结合的解决的柔性循环.
- 发现了MsmIMPDH独特的新型八聚化接口.
- 一个类似桶的密度表明了潜在的C端自我相互作用和调节机制.
结论:
- 这项研究为MSMIMPDH的基质诱导的结构动态提供了详细的见解.
- 新的相互作用接口和潜在的监管机制被揭示出来,为未来的IMPDH向药物设计提供了信息.
相关概念视频
ATP Synthase: Structure
11.8K
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...
11.8K
Induced-fit Model
80.0K
Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being consumed or permanently changed. They reduce the activation energy needed to convert the reactants into products. Enzymes are proteins, that usually work by binding to a substrate—a reactant molecule that they act upon.
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
80.0K
Protein-Protein Interfaces
3.6K
3.6K
ATP Synthase: Mechanism
13.8K
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...
13.8K
Cooperative Allosteric Transitions
2.4K
2.4K
Protein-protein Interfaces
12.4K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
12.4K


