格拉姆阳性HtrA,蛋白酶也是一个陪伴者
Sarah Latimer1, Charles Agbavor1, Laty A Cahoon1
1Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Journal of bacteriology
|December 23, 2025
概括
高温要求A (HtrA) 对于阳性细菌中的蛋白质稳态至关重要. 了解 HtrA 的理解
科学领域:
- 分子生物学分子生物学
- 细菌学 细菌学是一门学科.
- 蛋白质生物化学 蛋白质生物化学
背景情况:
- 高温要求A (HtrA) 是一种至关重要的蛋白质,通过伴侣和蛋白酶活动参与维持蛋白质平衡.
- HtrA确保了蛋白质折叠的质量控制,并降解了错误折叠的蛋白质,防止细胞损伤.
- 在阳性细菌中,HtrA在包膜完整性,抗压力,毒性,能力和生物膜动态方面发挥作用.
研究的目的:
- 审查当前的知识,并突出研究关于HtrA在格兰美阳性细菌的差距.
- 强调HtrA作为新型抗菌策略的潜在目标.
- 刺激对HtrA的监管机制和基板的专注研究.
主要方法:
- 这是一篇综述性文章,综合了有关Htr.A.的现有研究.
- 它分析了已知的功能,结构组件 (蛋白酶和PDZ域),以及HtrA的监管方面.
- 该评论讨论了HtrA在细菌病原发生的参与及其作为抗菌点的潜力.
主要成果:
- 作为伴侣和蛋白酶的HtrA的双重作用对于细菌的生存和毒性至关重要.
- 虽然已知一些监管系统 (双组件系统),但许多HtrA的上游信号和下游目标仍然未被描述.
- 缺乏结构信息和不清楚的监管途径给开发HtrA抑制剂带来了挑战.
结论:
- HtrA是有前途的抗菌点,因为它在阳性细菌中起着至关重要的作用.
- 需要进一步的研究来阐明HtrA的调控机制,确定其基质,并获得结构信息.
- 解决这些知识差距对于合理设计有效的HtrA抑制抗生素来打击不断上升的抗菌素耐药性至关重要.
更多相关视频
07:14Author Spotlight: Exploring Heat Shock Proteins in Malaria and Tuberculosis Infections
Published on: March 8, 2024
1.8K
10:24Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry
Published on: June 7, 2018
9.1K
相关概念视频
Molecular Chaperones and Protein Folding
19.5K
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...
19.5K
Bacterial Protein Maturation
409
Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...
409
Export of Misfolded Proteins out of the ER
4.9K
After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...
4.9K
Tail-anchoring of Proteins in the ER Membrane
3.6K
Tail-anchored, or TA, proteins are estimated to make up to 3-5% of membrane proteins found in the eukaryotic cell. Such proteins have a single transmembrane domain located approximately 30 amino acid residues upstream from the C-terminal end. As a result, the signal recognition particle (SRP) cannot guide a TA protein to the ER membrane for cotranslational insertion. Hence, they are integrated into the ER membrane post-translationally using their C-terminal end as the anchor. TA proteins...
3.6K
Energy to Drive Translocation
2.6K
Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...
Generally, polypeptides are unfolded by two distinct...
2.6K
Allosteric Proteins-ATCase
6.4K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
6.4K
