A New Targeting Approach to Inhibit Budding of the Ebola Virus
抑制埃博拉病毒萌芽的新靶向方法
基本信息
- 批准号:9763445
- 负责人:
- 金额:$ 22.64万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-08-14 至 2021-07-31
- 项目状态:已结题
- 来源:
- 关键词:AffinityAmino Acid SequenceAmino AcidsAnimal ModelAnimalsAntibodiesAntibody TherapyBiological AssayBiological ModelsBiophysicsCell SurvivalCell membraneCellsChemicalsClinicalCommunicable DiseasesComputer AnalysisDataDimerizationDisease OutbreaksDrug TargetingEbola virusEquilibriumEscape MutantFDA approvedFamilyFatality rateFiloviridae InfectionsFilovirusFrankfurt-Marburg Syndrome VirusFrightGenerationsGenesGlycoproteinsHumanIn VitroLaboratoriesLeadLife Cycle StagesLipid BilayersLipid BindingLipidsMalignant NeoplasmsMammalian CellMediatingMethodsModelingMutateMutationN-terminalPatientsPenetrationPeptidesPharmacologyPlasma CellsPreventive measureProcessProductionPropertyProteinsPublic HealthRecording of previous eventsStructural ProteinStructureTestingTherapeuticVaccine Clinical TrialVaccine TherapyVaccinesViralViral Matrix ProteinsVirionVirusVirus AssemblyVirus ReplicationVirus-like particleWestern Africaalpha helixbasechemical synthesiscostdesigndimerexperimental studyinsightlead candidatemonomerpandemic diseaseprotein protein interactionprotein structuresmall moleculetherapeutic targettherapeutic vaccinetoolvirus envelope
项目摘要
Abstract: Lipid-enveloped viruses replicate and bud from host cell membranes where they acquire their
lipid coat. Understanding the budding processes of several viruses has had significant impact on
elucidating the viral life cycle and identifying therapeutic targets. Filoviruses have a filamentous lipid-
envelope and despite being discovered more than 30 years ago, not much is known on how they assemble
and bud from the host cell plasma membrane. Filoviruses, which include Ebola virus (EBOV), have a high
fatality rate and there is still a lack of FDA approved therapeutics or vaccines for treatment. Moreover, the
EBOV glycoprotein, the prime target of antibody and vaccine therapy undergoes a high rate of mutation in
animal and human studies and escape mutant of glycoprotein have been found as EBOV is passaged
through animal models. Filoviruses encode seven genes including the viral matrix protein VP40, which
regulates budding from the host cell. VP40 as the only filovirus protein expressed in mammalian cells is
sufficient to produce virus like particles (VLPs) nearly indistinguishable from live virions. Thus, VP40 has
served as a model to study viral budding outside of BSL-4 laboratories. VP40 has been shown to be a
dimer, which is mediated by a-helical interactions in its N-terminal domain (NTD). Mutation of residues in
the NTD of VP40 that mediate dimerization is sufficient to abrogate viral budding in model systems. To date,
little is known about how VP40 monomer/dimer equilibrium and biophysics of oligomer assembly are
regulated as well as if VP40 is a viable drug target in the viral life cycle. The central hypothesis of this R21
proposal is that generation of a new chemical toolkit based upon stapled a-helical peptides can be used to
study VP40 assembly and inhibit VP40 dimerization. In specific aim 1, we will design and synthesize lead
candidate stapled a-helical peptides that target the VP40 dimer interface. We will elucidate the optimal
amino acid sequences and chemical linker of stapled a-helical peptides using computational analysis. We
hypothesize that optimization of the stapled helices can be performed to block VP40 dimer formation in vitro
and in cells. We will use computational analysis and a rapid chemical synthesis method to generate lead
candidates for quantitative analysis. Specific aim 2 will investigate the mechanism by which stapled a-
helical peptides interact with VP40 and inhibit VP40 dimerization and budding of VLPs. Quantitative assays
of VP40 dimer formation, VP40 lipid-binding, and budding of VLPs will be assessed to decipher the ability of
lead compounds to inhibit dimer formation and subsequent budding. Taken together, these studies should
produce new and important mechanistic insight into the viability of VP40 as a drug target and a better
biophysical understanding of the properties that govern VP40 assembly.
摘要:脂包膜病毒从宿主细胞膜复制并萌芽,在那里它们获得它们的
脂质外套。 了解几种病毒的萌芽过程对
阐明病毒的生命周期并确定治疗靶点。 丝状病毒具有丝状脂质
尽管 30 多年前就被发现了,但人们对它们的组装方式知之甚少
和从宿主细胞质膜出芽。 丝状病毒,包括埃博拉病毒 (EBOV),具有很高的感染率
死亡率高,并且仍然缺乏 FDA 批准的治疗方法或疫苗进行治疗。 此外,
埃博拉病毒糖蛋白是抗体和疫苗治疗的主要靶标,在
随着埃博拉病毒的传代,动物和人类研究发现了糖蛋白的逃逸突变体
通过动物模型。 丝状病毒编码七个基因,包括病毒基质蛋白 VP40,该基因
调节宿主细胞的出芽。 VP40 作为唯一在哺乳动物细胞中表达的丝状病毒蛋白是
足以产生与活病毒颗粒几乎无法区分的病毒样颗粒(VLP)。 因此,VP40 有
用作研究 BSL-4 实验室之外的病毒出芽的模型。 VP40 已被证明是
二聚体,由其 N 末端结构域 (NTD) 中的 aα-螺旋相互作用介导。 残基突变
介导二聚化的 VP40 的 NTD 足以消除模型系统中的病毒出芽。 迄今为止,
关于 VP40 单体/二聚体平衡和低聚物组装的生物物理学如何,人们知之甚少
VP40 是否是病毒生命周期中可行的药物靶标也受到监管。 R21 的中心假设
建议基于钉合α-螺旋肽生成新的化学工具包,可用于
研究 VP40 组装并抑制 VP40 二聚化。 在具体目标 1 中,我们将设计和合成先导化合物
候选人装订了针对 VP40 二聚体界面的 aα-螺旋肽。 我们将阐明最佳方案
使用计算分析确定钉合α-螺旋肽的氨基酸序列和化学接头。 我们
假设可以对装订螺旋进行优化以在体外阻断 VP40 二聚体的形成
以及细胞中。 我们将使用计算分析和快速化学合成方法来生成铅
定量分析的候选人。 具体目标 2 将研究钉合 a- 的机制
螺旋肽与 VP40 相互作用并抑制 VP40 二聚化和 VLP 出芽。 定量分析
将评估 VP40 二聚体形成、VP40 脂质结合和 VLP 出芽的能力,以破译
导致化合物抑制二聚体形成和随后的出芽。 综合起来,这些研究应该
对 VP40 作为药物靶点和更好的生存能力产生新的、重要的机制见解
对控制 VP40 组装特性的生物物理学理解。
项目成果
期刊论文数量(0)
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Robert Virgil Stahelin其他文献
Robert Virgil Stahelin的其他文献
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{{ truncateString('Robert Virgil Stahelin', 18)}}的其他基金
Elucidation of Assembly and Budding Mechanisms of SARS-CoV-2
阐明 SARS-CoV-2 的组装和出芽机制
- 批准号:
10595342 - 财政年份:2022
- 资助金额:
$ 22.64万 - 项目类别:
Elucidation of Assembly and Budding Mechanisms of SARS-CoV-2
阐明 SARS-CoV-2 的组装和出芽机制
- 批准号:
10707286 - 财政年份:2022
- 资助金额:
$ 22.64万 - 项目类别:
Computational and Biophysical Analysis of the Filovirus Matrix Protein System
丝状病毒基质蛋白系统的计算和生物物理分析
- 批准号:
10317727 - 财政年份:2021
- 资助金额:
$ 22.64万 - 项目类别:
Computational and Biophysical Analysis of the Filovirus Matrix Protein System
丝状病毒基质蛋白系统的计算和生物物理分析
- 批准号:
10448452 - 财政年份:2021
- 资助金额:
$ 22.64万 - 项目类别:
Computational and Biophysical Analysis of the Filovirus Matrix Protein System
丝状病毒基质蛋白系统的计算和生物物理分析
- 批准号:
10669678 - 财政年份:2021
- 资助金额:
$ 22.64万 - 项目类别:
Investigation of the role of phosphatidic acid metabolism in filovirus budding
磷脂酸代谢在丝状病毒出芽中的作用的研究
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9979431 - 财政年份:2020
- 资助金额:
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