相关实验视频
Updated: Jul 27, 2026
12:42
Microfluidic Mixers for Studying Protein Folding
Published on: April 10, 2012
蛋白酶酶超级家族中的融合动态
Vincenzo Carnevale1, Simone Raugei, Cristian Micheletti
1International School for Advanced Studies (SISSA) and INFM Democritos, Via Beirut 2-4, I-34014 Trieste, Italy.
Journal of the American Chemical Society
|July 27, 2006
概括
蛋白酶是切割键的必需酶,具有保存的结构特征和协调的运动. 这些不同蛋白酶家族之间的相似性表明,酸水解机制的共同进化起源.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 进化生物学 进化生物学
背景情况:
- 蛋白酶是通过分裂键来调节生物过程的关键酶.
- 已知的基因组中约有2%为这些蛋白质分解酶编码,这突显了它们的基本重要性.
- 了解蛋白酶机制是许多生物和医学应用的关键.
研究的目的:
- 研究在进化上相距较远的蛋白酶对中保存的结构和动态特征.
- 在蛋白酶的功能相关区域中确定共同的组织原则.
- 探索不同蛋白酶家族的化基底的共享机制.
主要方法:
- 对选定蛋白酶对进行比较结构分析.
- 蛋白质动态和协调运动的分析.
- 跨多种蛋白酶家族的生物信息比较.
主要成果:
- 选择的蛋白酶对共享功能相关区域的共同结构组织,不论是寡合体状态,催化残留物或折叠.
- 这些保存区域在酶作用期间经历类似的协同运动.
- 在进化上遥远的蛋白酶家族中观察到结构和动态相似之处.
结论:
- 蛋白酶功能的基础是保留的结构和动态原理.
- 这些保存的特征表明化水解的共同进化途径.
- 这些发现提供了对酶性键裂解的基本机制的见解.
相关概念视频
02:47Protein Families
Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key locations, protein...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
02:47Protein Families
Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key locations, protein...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
01:58Mechanical Protein Function
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.
01:19Protein Dynamics in Living Cells
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...