蛋白质酸酶1调节的结构基础
Mohammed Terrak1, Frederic Kerff, Knut Langsetmo
1Boston Biomedical Research Institute, 64 Grove Street, Watertown, Massachusetts 02472, USA.
Nature
|May 28, 2004
概括
蛋白酸酶1 (PP1) 通过像MYPT1.1.这样的调节子单元获得基质特异性. 结构分析揭示了MYPT1如何重塑PP1的结构.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 氨酸/氨酸 (Ser/Thr) 蛋白激酶和酶通过酸化调节生物过程.
- 蛋白酶1 (PP1) 对于细胞功能至关重要,但缺乏固有的基质特异性.
- 监管子单位,通常包含RVxF图案,赋予PP1的特异性.
研究的目的:
- 为了确定PP1-MYPT1复合物的晶体结构.
- 了解MYPT1如何调节PP1的活动和特异性.
- 阐明PP1基底向的结构基础.
主要方法:
- 在2.7 Å分辨率的X射线晶体学.
- 蛋白酸酶1 (PP1) 与MYPT1.1.的N端域的联合结晶.
- 对PP1-MYPT1复合体的结构分析.
主要成果:
- 确定了PP1-MYPT1复合物的晶体结构.
- MYPT1结合显著重塑了PP1的催化裂.
- 围绕MYPT1的RVxF图案的结构元素是这种重塑和肌特异性的关键.
结论:
- 结合MYPT1通过形状变化使PP1具有肌特异性.
- 揭示的结构提供了对PP1监管的见解,由各种各样的子单位.
- 这种机制可用于理解其他PP1调节相互作用.
相关概念视频
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...


