类似帕帕因的氨酸蛋白酶的结构转变:对传感器发育的影响
Srdjan Marković1, Natalija S Andrejević1, Jelica Milošević1
1Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia.
Biomimetics (Basel, Switzerland)
|July 28, 2023
概括
阻止了帕帕因的产生.
科学领域:
- 生物化学 生物化学
- 生物技术是生物技术.
- 酶学 是一种酶学.
背景情况:
- 类似帕帕因的氨酸蛋白酶在生物医学和生物技术中至关重要.
- 它们的自由醇组是传感器发育和抑制剂结合的关键.
- 保护原生蛋白质结构对于抑制剂相互作用和分子印记至关重要.
研究的目的:
- 为了研究可逆醇组阻断对帕帕因变性化的影响.
- 评估阻断如何影响帕帕因的活性损失和聚合.
- 了解在抑制剂被移除后变性和活性的可逆性.
主要方法:
- 使用S-甲基甲二硫酸盐 (MMTS) 可逆地阻断帕帕因的自由醇组.
- 使用的生物物理技术:度测量和高分辨率红外光谱学.
- 蛋白质结构的量化变化,包括二次结构含量和聚合.
主要成果:
- 结合MMTS增加了对疏水性残留物的暴露,通过增强的8-Anilinonaphthalene-1-硫酸光度来表明.
- 观察到显著的二次结构变化:α螺旋和无序结构减少,β片增加 (25%至52%).
- 可逆抑制与可逆变性相关,但高抑制剂过量导致不可逆转的活性损失.
结论:
- 在帕帕因中,可逆的醇阻断会导致变性和聚合,在去除抑制剂后可以逆转.
- 高度的阻断剂可以导致不可逆转的变性,影响酶活性.
- 帕帕因类蛋白酶的稳定,富含β片的域为基于折叠分子的传感器开发提供了潜力.
相关概念视频
Caspases
12.6K
Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
12.6K
The Proteasome
8.8K
Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
8.8K
The Proteasome Structure
805
The ubiquitin-proteasome pathway is a well-known mechanism utilized by eukaryotic cells to remove cytoplasmic proteins that are misfolded, damaged, or no longer needed. In this pathway, the protein that needs to be eliminated undergoes a process called ubiquitination, where a chain of ubiquitin molecules is attached to the 48th lysine residue of the target protein. This ubiquitin modification helps the proteasome distinguish between a target protein and a healthy protein.
The proteasome is an...
The proteasome is an...
805
Transducer Mechanism: Enzyme-Linked Receptors
2.5K
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
2.5K


