定义人类肺部V8蛋白酶的病态降解组从金黄色葡萄球菌
Emilee M Mustor1,2, Dale Chaput1, Sophie Sipprell1,2
1Department of Molecular Biosciences, University of South Florida, Tampa, Florida, USA.
Infection and immunity
|March 5, 2026
概括
黄金葡萄球菌V8蛋白酶 (SspA) 向人类蛋白质,破坏免疫防御,包括补体和中性粒细胞功能. 这项研究揭示了SspAA.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 蛋白质组学是指蛋白质组学
背景情况:
- 黄金葡萄球菌 (Staphylococcus aureus) 是人类的主要病原体.
- 细胞外蛋白质酶,如V8蛋白质酶 (SspA),对于S. aureus的毒性至关重要.
- SspA 的宿主目标在很大程度上仍未确定.
研究的目的:
- 为了全面识别S. aureus V8蛋白酶 (SspA) 的宿主蛋白点.
- 阐明SspA操纵宿主免疫力并导致疾病的机制.
主要方法:
- 使用高效率的N-terminomic方法 (TAGS-CR).使用高效率的N-terminomic方法 (TAGS-CR).
- 在人肺蛋白质组中捕获了大约320个生物学相关的V8蛋白酶标.
主要成果:
- 确定了参与补充系统调制的V8蛋白酶标 (例如,补充C3).
- 证明中性粒细胞功能受到干扰 (ROS产生,迁移,细胞化,脱粒).
- 显示了对上皮屏障蛋白 (遮蔽区,α行为素) 和actin的向.
- 通过向铁复杂蛋白质 (转素,血素,血红蛋白) 揭示了营养免疫的利用.
- 确定了免疫调节器的破坏,如gelsolin.
结论:
- 黄金菌V8蛋白酶 (SspA) 广泛操纵宿主防御系统,包括补体,中性粒细胞和上皮屏障.
- 在营养免疫和炎症中,SspA起着重要的作用.
- 这项研究提供了SspA目标的全面地图,揭示了保存的毒性机制.
更多相关视频
09:26Antibiotic Efficacy Testing in an Ex vivo Model of Pseudomonas aeruginosa and Staphylococcus aureus Biofilms in the Cystic Fibrosis Lung
Published on: January 22, 2021
7.8K
11:23Purifying the Impure: Sequencing Metagenomes and Metatranscriptomes from Complex Animal-associated Samples
Published on: December 22, 2014
37.7K
相关概念视频
The Proteasome
10.4K
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...
10.4K
The Proteasome
1.9K
Eukaryotic cells can degrade proteins through several pathways. One of the most important among 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. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
1.9K
Role of Matrix Metalloproteases in Degradation of ECM
3.6K
Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult...
3.6K
The Proteasome Structure
2.0K
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...
2.0K
