The role and fate of Mtb storage lipids LCTAG and MWE
Mtb 储存脂质 LCTAG 和 MWE 的作用和命运
基本信息
- 批准号:9893601
- 负责人:
- 金额:$ 24.41万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2020
- 资助国家:美国
- 起止时间:2020-03-23 至 2022-02-28
- 项目状态:已结题
- 来源:
- 关键词:AnabolismAntibiotic ResistanceBacteriaBiochemicalBiologicalBiological ProcessCarbonCause of DeathCell WallCommunicable DiseasesCytoplasmDataDiseaseDrug ToleranceEnergy-Generating ResourcesEnvironmentEstersExhibitsFailureFatty AcidsGenesGeneticGenus MycobacteriumGranulomaHomeostasisHypoxiaIn VitroLipidsMembraneMetabolicMetabolismMicrobial BiofilmsModelingMycobacterium tuberculosisNecrosisNutrientOrganismOxygenPathway interactionsPhasePhenotypePhysiologyProteinsRecyclingResearchResearch PersonnelResource SharingResourcesResuscitationRoleSourceStressSurfaceSystemTestingTriglyceridesTuberculosisUp-RegulationVirulenceWaxesbasecapsulecell envelopedeprivationesteraseexperimental studyextracellularhuman pathogenin vitro Modelin vivolatent infectionlipid transportmetabolomicsmutantmycobacterialmycolateresponsesuccesstargeted treatmenttranscriptome sequencingtuberculosis drugs
项目摘要
SUMMARY
Tuberculosis is one of the leading causes of death due to infectious disease despite the availability of anti-
tubercular drugs. The majority of M. tuberculosis (Mtb) infections result in latent TB where bacteria have
altered metabolism and exhibit phenotypic drug tolerance. The biological pathways used to maintain metabolic
homeostasis and then fuel resuscitation and replication are poorly understood.
A crucial component of dormancy or quiescence is the storage of carbon and energy sources in cell wall
lipids that can be recycled upon resuscitation. Mtb generates the “storage lipids” triacylglycerol (TAG) and wax
esters (WE) in late stationary phase and in response to stresses commonly associated with dormancy. During
the transition to active replication, it is believed that these lipids are mobilized and employed as a metabolic
resource. However, this has not been experimentally demonstrated. We recently described the Very Long-
Chain triacylglycerol (LCTAG) and mycolate wax ester (MWE) of Mtb. These lipids are exported from the
cytoplasm to the mycobacterial outer membrane or capsule by the MmpL11 transporter. The fates of LCTAG
and MWE once they are extracellular are not known. However, correct localization of LCTAG and MWE is
important for Mtb virulence and physiology since 1) MmpL11 is required for virulence and 2) the Mtb mmpL11
mutant has reduced resuscitation from an in vitro non-replicating persistence model. As storage lipids, surface-
localized LCTAG and MWE may be utilized as a shared resource to maintain viability and resuscitate from
non-replicating persistence.
Based on our data, we hypothesize that Mtb hydrolyzes, imports and utilizes exported storage lipids to
promote resuscitation from hypoxic and nutrient-restricted environments.
We propose to test this hypothesis by 1) Determining how LCTAG and MWE contribute to Mtb
resuscitation from non-replicating persistence, and 2) Define proteins involved in the LCTAG and MWE
biosynthesis and recycling pathway. This exploratory study combines unbiased approaches with genetic and
biochemical analyses to investigate the important biological process of Mtb cell envelope remodeling in
metabolism.
总结
结核病是由于传染病导致死亡的主要原因之一,尽管抗结核药物是可用的。
抗结核药大多数M。结核病(Mtb)感染导致潜伏性结核病,
改变代谢并表现出表型药物耐受性。用于维持代谢的生物途径
体内平衡,然后燃料复苏和复制是知之甚少。
休眠或静止的一个重要组成部分是细胞壁中碳和能源的储存
复苏后可以回收的脂质。结核分枝杆菌产生“储存脂质”三酰甘油(TAG)和蜡
酯(WE)在后期稳定期和响应压力通常与休眠。期间
在向主动复制的转变中,据信这些脂质被动员并用作代谢代谢产物,
resource.然而,这还没有得到实验证明。我们最近描述了很长一段时间-
链三酰甘油(LCTAG)和霉菌蜡酯(MWE)的Mtb。这些脂质从
通过MmpL 11转运蛋白将细胞质转运至分枝杆菌外膜或包膜。LCTAG的命运
和MWE,一旦它们是细胞外的是未知的。然而,LCTAG和MWE的正确定位是
MmpL 11对于Mtb毒力和生理学是重要的,因为1)MmpL 11是毒力所需的,2)Mtb mmpL 11
突变体从体外非复制持久性模型的复苏减少。作为储存脂质,表面-
局部LCTAG和MWE可用作共享资源,以维持生存力并从
非复制持久性。
基于我们的数据,我们假设Mtb水解、输入和利用输出的储存脂质,
促进从缺氧和营养受限的环境中复苏。
我们建议通过1)确定LCTAG和MWE如何对Mtb做出贡献来检验这一假设
从非复制持久性复苏,和2)定义参与LCTAG和MWE的蛋白质
生物合成和循环途径。这项探索性研究结合了遗传学和
生化分析,以研究Mtb细胞包膜重塑的重要生物学过程,
新陈代谢.
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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Georgiana E. Purdy其他文献
Cryo-EM structure of the emMycobacterium smegmatis/em MmpL5-AcpM complex
耻垢分枝杆菌 MmpL5-AcpM 复合物的冷冻电镜结构
- DOI:
10.1128/mbio.03035-24 - 发表时间:
2024-11-13 - 期刊:
- 影响因子:4.700
- 作者:
Rakesh Maharjan;Zhemin Zhang;Philip A. Klenotic;William D. Gregor;Georgiana E. Purdy;Edward W. Yu - 通讯作者:
Edward W. Yu
Mycobacterium tuberculosis and the four-minute phagosome
结核分枝杆菌和四分钟吞噬体
- DOI:
- 发表时间:
2005 - 期刊:
- 影响因子:0
- 作者:
D. Russell;Georgiana E. Purdy;R. Owens;K. Rohde;R. Yates - 通讯作者:
R. Yates
M. tuberculosis Rv2252 encodes a diacylglycerol kinase involved in the biosynthesis of phosphatidylinositol mannosides (PIMs)
结核分枝杆菌 Rv2252 编码参与磷脂酰肌醇甘露糖苷 (PIM) 生物合成的二酰甘油激酶
- DOI:
10.1111/j.1365-2958.2006.05174.x - 发表时间:
2006 - 期刊:
- 影响因子:3.6
- 作者:
Róisín M. Owens;F. Hsu;B. VanderVen;Georgiana E. Purdy;Elizabeth Hesteande;P. Giannakas;J. Sacchettini;J. Mckinney;P. Hill;J. Belisle;B. Butcher;Kevin Pethe;D. Russell - 通讯作者:
D. Russell
Georgiana E. Purdy的其他文献
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{{ truncateString('Georgiana E. Purdy', 18)}}的其他基金
Metabolite modulation of Mtb regulators of cell wall biogenesis
细胞壁生物发生的结核分枝杆菌调节剂的代谢调节
- 批准号:
10053297 - 财政年份:2016
- 资助金额:
$ 24.41万 - 项目类别:
Metabolite modulation of Mtb regulators of cell wall biogenesis
细胞壁生物发生的结核分枝杆菌调节剂的代谢调节
- 批准号:
9234364 - 财政年份:2016
- 资助金额:
$ 24.41万 - 项目类别:
Mtb regulators of essential and virulence-associated MmpLs
必需 MmpL 和毒力相关 MmpL 的 Mtb 调节因子
- 批准号:
9106596 - 财政年份:2015
- 资助金额:
$ 24.41万 - 项目类别:
TB Membrane Transporters and Intrinsic Resistance
结核病膜转运蛋白和固有耐药性
- 批准号:
8492015 - 财政年份:2011
- 资助金额:
$ 24.41万 - 项目类别:
TB Membrane Transporters and Intrinsic Resistance
结核病膜转运蛋白和固有耐药性
- 批准号:
8676638 - 财政年份:2011
- 资助金额:
$ 24.41万 - 项目类别:
TB Membrane Transporters and Intrinsic Resistance
结核病膜转运蛋白和固有耐药性
- 批准号:
8868006 - 财政年份:2011
- 资助金额:
$ 24.41万 - 项目类别:
TB Membrane Transporters and Intrinsic Resistance
结核病膜转运蛋白和固有耐药性
- 批准号:
8039513 - 财政年份:2011
- 资助金额:
$ 24.41万 - 项目类别:
TB Membrane Transporters and Intrinsic Resistance
结核病膜转运蛋白和固有耐药性
- 批准号:
8296272 - 财政年份:2011
- 资助金额:
$ 24.41万 - 项目类别:
Mycobacterial genes mediating resistance to bactericidal ubiquitin peptides
介导杀菌泛素肽抗性的分枝杆菌基因
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7514596 - 财政年份:2009
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$ 24.41万 - 项目类别:
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