The role of nanocompartments in M. tuberculosis pathogenesis
纳米区室在结核分枝杆菌发病机制中的作用
基本信息
- 批准号:10020315
- 负责人:
- 金额:$ 38.11万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-09-18 至 2024-08-31
- 项目状态:已结题
- 来源:
- 关键词:AldehydesAltruismAntibiotic TherapyArchaeaAttenuatedBacteriaBiochemistryCellsCharacteristicsDataDefense MechanismsDrug Metabolic DetoxicationDyesEncapsulatedEnvironmentEnzymesEukaryotaGenesGrantGrowthHydrogen PeroxideImmunologicsIn VitroIndividualInfectionInflammationLinkLipid PeroxidesLipidsLysosomesM. tuberculosis genomeMolecularMycobacterium tuberculosisNADPNADPH OxidaseOrganellesOxidasesOxidative StressPathogenesisPeroxidasesPeroxidesPhagocytesProductionProteinsReactive Oxygen SpeciesResistanceRespiratory BurstRoleSystemTestingVirulenceattenuationaxenic culturebacterial geneticsbaseenzyme activityexperimental studyextracellularhuman pathogenin vivoinsightmacrophagemicrobicidemouse modelmutantnovelpathogenpathogenic bacteriaresistance mechanismstability testingstressorsuccess
项目摘要
Contact PD/PI: Stanley, Sarah A
Project Summary. The bacterial pathogen Mycobacterium tuberculosis is highly resistant to oxidative stress
encountered in the host, however defense mechanisms remain poorly characterized. This proposal seeks to
characterize a nanocompartment system in M. tuberculosis that we propose contributes to defense against
oxidative stress. Nanocompartments are protein-based organelles that encapsulate an enzymatic cargo, often
an enzyme related to oxidative defense. Although genes encoding nanocompartments are widespread in
bacteria and archaea, their endogenous functions are not well understood and it is not clear what benefit the
encapsulation of specific enzymes provides. We have discovered that M. tuberculosis has a bacterial
nanocompartment system that is required for defense against oxidative stress. This system consists of the
encapsulin protein Cfp29 and the cargo protein DypB, a dye decolorizing peroxidase. Our hypothesis is that
the M. tuberculosis DypB nanocompartment system is required for resisting oxidative stresses encountered in
host macrophages. Building on preliminary data in which we show that DypB encapsulin mutants are
attenuated for growth in macrophages, and that these mutants are also susceptible to H2O2 at pH 4.5 in axenic
culture we test this hypothesis in three aims. 1) Determine whether encapsulation promotes DypB stability and
function; 2) Determine whether the M. tuberculosis DypB encapsulin system is required for defense against
lipid peroxides; 3) Determine the role of the DypB nanocompartment in virulence of M. tuberculosis. If
successful, the proposed experiments will provide the first link between a nanocompartment system and
bacterial virulence, advancing our understanding of how M. tuberculosis, and possibly other pathogens, defend
against diverse oxidative stresses encountered in the host. In addition, these studies will provide insights into
the function of encapsulin systems and the specific role of the shell protein. Finally, these studies will advance
our understanding of the endogenous functions of DyP peroxidases, which are widespread throughout
bacteria, archaea, and eukaryotes
Page 6
Project Summary/Abstract
联系PD/PI:Stanley,Sarah A
项目摘要。细菌病原体结核分枝杆菌对氧化应激具有高度抗性
在主机中遇到的,但防御机制仍然很差的特点。这项建议旨在
表征M中的纳米室系统。我们认为结核病有助于防御
氧化应激纳米隔室是基于蛋白质的细胞器,其封装酶货物,通常
一种与氧化防御有关的酶。尽管编码纳米区室的基因在
细菌和古细菌,它们的内源性功能还没有很好地理解,也不清楚什么有益于
特定酶的封装提供。我们发现M。结核病有一种细菌,
纳米区室系统,需要防御氧化应激。该系统由
标记蛋白Cfp 29和货物蛋白DypB,染料脱色过氧化物酶。我们的假设是
分枝结核病DypB纳米区室系统是抵抗结核病中遇到的氧化应激所必需的。
宿主巨噬细胞基于初步数据,我们表明DypB β蛋白突变体是
在巨噬细胞中的生长减弱,并且这些突变体在无菌环境中在pH 4.5时也对H2 O2敏感。
文化我们测试这个假设在三个目标。1)确定包封是否促进DypB稳定性,
函数; 2)确定M.结核病需要DypB介导系统来防御
脂质过氧化物; 3)确定DypB纳米区室在M.结核如果
如果成功,拟议的实验将提供纳米隔室系统与
细菌的毒力,推进我们对M.结核病和其他病原体,
抵抗宿主中遇到的各种氧化应激。此外,这些研究还将为以下方面提供见解:
的功能和壳蛋白的具体作用。最后,这些研究将推进
我们对DyP过氧化物酶的内源性功能的理解,这是广泛存在于整个
细菌、古生菌和真核生物
第6页
项目总结/摘要
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Sarah A Stanley其他文献
Sarah A Stanley的其他文献
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{{ truncateString('Sarah A Stanley', 18)}}的其他基金
The role of nanocompartments in M. tuberculosis pathogenesis
纳米区室在结核分枝杆菌发病机制中的作用
- 批准号:
10247654 - 财政年份:2019
- 资助金额:
$ 38.11万 - 项目类别:
Modeling tuberculosis infection in a new collection of genetically diverse mice
在一组新的遗传多样性小鼠中建立结核感染模型
- 批准号:
9808825 - 财政年份:2019
- 资助金额:
$ 38.11万 - 项目类别:
The role of nanocompartments in M. tuberculosis pathogenesis
纳米区室在结核分枝杆菌发病机制中的作用
- 批准号:
10689049 - 财政年份:2019
- 资助金额:
$ 38.11万 - 项目类别:
The role of nanocompartments in M. tuberculosis pathogenesis
纳米区室在结核分枝杆菌发病机制中的作用
- 批准号:
10462785 - 财政年份:2019
- 资助金额:
$ 38.11万 - 项目类别:
The role of lipid droplets in immunity to M. tuberculosis infection
脂滴在结核分枝杆菌感染免疫中的作用
- 批准号:
9278110 - 财政年份:2016
- 资助金额:
$ 38.11万 - 项目类别:
The role of lipid droplets in immunity to M. tuberculosis infection
脂滴在结核分枝杆菌感染免疫中的作用
- 批准号:
9168274 - 财政年份:2016
- 资助金额:
$ 38.11万 - 项目类别:
Metabolic regulation of macrophage function during M. tuberculosis infection
结核分枝杆菌感染期间巨噬细胞功能的代谢调节
- 批准号:
10626926 - 财政年份:2015
- 资助金额:
$ 38.11万 - 项目类别:
Metabolic regulation of macrophage function during M. tuberculosis infection
结核分枝杆菌感染期间巨噬细胞功能的代谢调节
- 批准号:
9049446 - 财政年份:2015
- 资助金额:
$ 38.11万 - 项目类别:
Metabolic regulation of macrophage function during M. tuberculosis infection
结核分枝杆菌感染期间巨噬细胞功能的代谢调节
- 批准号:
10410449 - 财政年份:2015
- 资助金额:
$ 38.11万 - 项目类别:
Temporal profiling of the functional phosphoproteome in M. tuberculosis infected
感染结核分枝杆菌的功能性磷酸蛋白质组的时间分析
- 批准号:
8791881 - 财政年份:2014
- 资助金额:
$ 38.11万 - 项目类别:
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