UBIQUITIN C-TERMINAL HYDROLASE L3 COMPLEX WITH UBIQUITIN-BASED SUICIDE SUBSTRATE

泛素 C 末端水解酶 L3 复合物与基于泛素的自杀底物

• 批准号: 8169223
• 负责人: RACHELLE GAUDET
• 金额: $ 0.35万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8169223
• 关键词: Antigen Presentation; Architecture; Bacteria; Complex; Computer Retrieval of Information on Scientific Projects Database; Data; Funding; Grant; Host Defense Mechanism; Hydrolase; Institution; Malaria; Membrane Protein Traffic; Molecular; Orthologous Gene; Parasites; Pathway interactions; Plasmodium falciparum; Proteins; Regulation; Research; Research Personnel; Resources; Source; Specificity; System; Ubiquitin; United States National Institutes of Health; Virus; base; interest; multicatalytic endopeptidase complex; novel strategies; pathogen; suicide substrates

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. A new approach to controlling malaria-causing Plasmodium falciparum aims at the parasite's ubiquitin-proteasome pathway which is essential for its survival. Since the host's defense mechanisms against pathogens rely on the ubiquitin-proteasome system in antigen presentation and in the regulation of membrane trafficking, many viruses and bacteria encode proteins that act on the ubiquitin-proteasome pathway, yet there is a near-complete lack of data on this pathway in parasites. It was shown that the mammalian UchL3 ortholog in Plasmodium falciparum (PfUchL3) possesses deubiquitinating as well as deNeddylating activity. We are interested in determining the molecular architecture of PfUchL3 and revealing the mechanisms for the dual specificity towards ubiquitin and NEDD8. To this end we prepared crystals of the complex between PfUchL3 and the ubiquitin based suicide substrate UbVME.

该子项目是利用该技术的众多研究子项目之一 资源由 NIH/NCRR 资助的中心拨款提供。子项目及 研究者 (PI) 可能已从 NIH 的另一个来源获得主要资金， 因此可以在其他 CRISP 条目中表示。列出的机构是 对于中心来说，它不一定是研究者的机构。 一种控制引起疟疾的恶性疟原虫的新方法针对寄生虫的泛素蛋白酶体途径，该途径对其生存至关重要。由于宿主针对病原体的防御机制依赖于抗原呈递和膜运输调节的泛素蛋白酶体系统，因此许多病毒和细菌编码作用于泛素蛋白酶体途径的蛋白质，但寄生虫中该途径的数据几乎完全缺乏。 结果表明，恶性疟原虫中的哺乳动物 UchL3 直系同源物 (PfUchL3) 具有去泛素化和去 Neddylation 活性。我们感兴趣的是确定 PfUchL3 的分子结构并揭示针对泛素和 NEDD8 的双重特异性的机制。为此，我们制备了 PfUchL3 和基于泛素的硅化物底物 UbVME 之间的复合物晶体。