分子子阻塞蛋白质机器的功能孔
Abbna Kirupakaran1, Johannes van den Boom2, Mike Blueggel2
1Faculty of Chemistry, University of Duisburg-Essen, 45141 Essen, Germany.
Journal of the American Chemical Society
|May 12, 2025
概括
研究人员开发了一种新型的多价子来阻断蛋白质毛孔,专门针对p97酶. 这一突破为药物发现和抗击疾病提供了新的策略,
科学领域:
- 生物化学
- 分子生物学
- 超分子化学
背景情况:
- 在蛋白质质量控制和细胞存活方面,p97酶 (一个六合体AAA-ATPase) 是至关重要的.
- 通过其中央孔隙将基质蛋白线连接而起作用,这是由ATP水解推动的过程.
- 针对蛋白质毛孔是一种有前途的治疗策略.
研究的目的:
- 设计和表征对称的多价作为蛋白质毛孔的新型抑制剂.
- 研究这些子对p97酶的抑制机制.
- 建立多价位作为针对蛋白质毛孔的多功能超分子策略.
主要方法:
- 以分子模型为指导的合理药物设计.
- 合成和表征C3对称的多价.
- 生物物理方法 (基于光的测定) 和生物化学测定 (ATPase活性,蛋白质展开).
- 位点定向突变,以验证结合位点和机制.
主要成果:
- 开发并描述了能够与p97孔口结合的对称多价.
- 通过阻断孔隙, 针可以抑制p97 ATPase活动和基质展开.
- 证实了对p97的特定结合,并通过突变发生验证了孔隙阻断机制.
- 展示了C3对称针作为强大的抑制剂, 与p97的对称性一致.
结论:
- 多价子代表了一种新型的超分子元素,用于功能性地阻断蛋白质毛孔.
- 这种策略有效地抑制AAA-ATPase p97,证实基质线程作为其机制.
- 开发的孔隙结合剂为药物发现和治疗与p97功能障碍相关的疾病提供了新的途径.
相关概念视频
Mechanical Protein Functions
4.9K
Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force.
4.9K
Mechanical Protein Function
2.0K
2.0K
Microtubule Associated Motor Proteins
7.6K
Eukaryotic cells have different motor proteins for transporting various cargo within the cell. These motor proteins differ based on the filament they associate with, the direction they move within the cell, and the type of cargo they transport. Motor proteins that associate with microtubules are known as microtubule-associated motor proteins. There are two families of microtubule-associated motor proteins —Kinesins and Dyneins. Both these proteins assist in the transport of cellular...
7.6K
Protein Translocation Machinery on the ER Membrane
4.4K
The translocon complex situated on the ER membrane is the main gateway for the protein secretory pathway. It facilitates the transport of nascent peptides into the ER lumen and their insertion into the ER membrane.
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the...
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the...
4.4K
Molecular Chaperones and Protein Folding
17.6K
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
17.6K
Pinching-off of Coated Vesicles
3.1K
Vesicle budding is orchestrated by distinct cytosolic proteins such as adaptor proteins, coat proteins, and GTPases. To initiate vesicle budding, membrane-bending proteins containing crescent-shaped BAR domains bind to the lipid heads in the bilayer and distort the membrane to form a protein-coated vesicle bud. Adaptors proteins such as AP2 for clathrin-coated vesicles can nucleate on the deformed membrane. Finally, coat proteins such as clathrin or COPI and COPII assemble into a coat forming...
3.1K


