Cyclic Peptide Inhibitors of HIV-1 Proliferation
HIV-1 增殖的环肽抑制剂
基本信息
- 批准号:9979753
- 负责人:
- 金额:$ 38.79万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-09-30 至 2022-07-31
- 项目状态:已结题
- 来源:
- 关键词:AIDS/HIV problemAddressAffinityAmino AcidsAnimalsAnti-HIV AgentsAntiviral AgentsApoptosisBase PairingBindingBinding ProteinsBiologicalBiological AssayCalorimetryCationsCellsChemicalsColoradoComplexComplex AnalysisCoupledCrystallizationCyclic PeptidesDevelopmentDissociationDrug TargetingDrug resistanceElementsEvolutionExhibitsFDA approvedGenetic TranscriptionGuanineHIVHIV-1Hela CellsHumanHydrogen BondingLeadLife Cycle StagesLigandsLongevityMajor GrooveMammalian CellMeasuresMolecular ConformationMusMutationNuclear ExtractNucleotidesOutcomePathway interactionsPatientsPenetrationPeptidesPharmaceutical PreparationsPharmacologic SubstancePharmacologyPlayPrivatizationPropertyProtein AnalysisProtein EngineeringProteinsRNARNA Recognition MotifRNA SplicingRNA analysisRNA-Protein InteractionReagentRecordsRefractoryResistanceResolutionRoleSchemeSite-Directed MutagenesisSmall Ubiquitin-Related Modifier ProteinsSodium ChlorideSpecificityStructureSurface Plasmon ResonanceTarsTestingTherapeuticTherapeutic IndexThickThinnessTitrationsToxic effectTransactivationUniversitiesVaccinesValidationVariantVertebral columnViralViral ProteinsVirusWorkYeastsaging populationbasebiophysical analysiscombatdesigndrug developmentdrug discoveryimprovedin vivoinhibitor/antagonistinnovationnext generationnovelpeptide drugpeptidomimeticsprotein complexprotein protein interactionresistance mutationsmall moleculestemstructural biologytat Proteintherapeutic developmenttherapeutic targettherapy outcome
项目摘要
Abstract. Innovative approaches are needed to create therapeutics that target HIV. Existing drugs can prolong
patient lifespan by targeting multiple facets of the viral life cycle, but next-generation therapies are needed that
act on new targets — especially those that resist mutation — to improve long-term therapeutic compliance and
outcome. HIV-1 TAR RNA is a validated drug target that resists mutations to interact with the viral protein Tat,
thus giving rise to an RNA-protein complex essential for proviral transcription and HIV-1 propagation. So far,
TAR has evaded discovery of compounds with sufficient affinity and selectivity to warrant pharmaceutical
development. To address this challenge, we undertook a ‘semi-design and protein evolution’ approach that
yielded many novel, high-affinity (KDs ~ 1.3 to 0.5 nM) TAR Binding Proteins (TBPs) using yeast display
maturation. We then determined the 1.80 Å resolution co-crystal structure of one variant, TBP6.7, in complex
with TAR, revealing that the major binding interface consists of evolved loop β2-β3, which reads out the TAR
RNA major groove. We hypothesize that cyclic peptides comprising the TBP6.7 β2-β3 loop, or other TBP loops
evolved in our lab, will be entry points to create a novel class of TAR binders. Indeed, the TBP6.7 β2-β3
hairpin retains affinity and specificity for TAR when fused to the small protein SUMO, signifying that the β2-β3
loop is necessary and sufficient for TAR recognition. Structural identification of the β-hairpin motif, and our use
of semi-design and evolution make our approach fundamentally different from prior efforts to block the Tat-TAR
interaction, while providing a robust experimental premise to pursue our aims: (Aim 1) Validate the observed
TBP6.7-TAR interface and determine additional novel co-crystal structures of other TBPs evolved in our lab;;
(Aim 2) synthesize and optimize cyclic peptides derived from Aim 1 that bind TAR and inhibit its interaction with
Tat;; (Aim 3) Test cyclic peptides from Aim 2 using viral infectivity assays to investigate mechanisms of action,
therapeutic indices, and pharmacological properties in animals. To our knowledge, no other group has used
protein evolution and structural biology to develop HIV-1 TAR-targeted reagents. We are a team of experts,
comprising two P.I.s, with strong records in protein evolution, peptide-based drug discovery, HIV therapeutic
discovery, measuring cell penetration and toxicity of biologics (McNaughton), and structural biology of
therapeutically-relevant RNAs, protein-RNA complexes, and biophysical analysis of protein-RNA interactions
(Wedekind), as well as two collaborators: Harold Smith (University of Rochester), a leader in drug discovery
and development, and CEO of OyaGen Inc., a private company developing anti-HIV drugs, and Dan Gustafson
(Colorado State University), a clinician and pharmacologist with expertise in measuring pharmacological
profiles of therapeutics. We are uniquely qualified and well suited to perform this work. High-value outcomes
include: (i) identification of novel lead inhibitors of HIV, and (ii) validation of our ‘semi-design’ and structural
approach, which has the potential for sustained impact on the drug discovery and inhibitor design fields.
摘要:需要创新的方法来创造针对艾滋病毒的治疗方法。现有的药物可以延长
通过靶向病毒生命周期的多个方面来延长患者的寿命,但需要下一代疗法,
作用于新的靶点--特别是那些抗突变的靶点--以改善长期治疗依从性,
HIV-1 TAR RNA是一种经验证的药物靶标,其抵抗突变以与病毒蛋白达特相互作用,
从而产生前病毒转录和HIV-HIV 1增殖所必需的RNA-β蛋白复合物。迄今为止,
TAR避免了发现具有足够亲和力和选择性的化合物,以保证药物
为了应对这一挑战,我们采用了一种“半重复设计和蛋白质进化”的方法,
利用酵母展示技术获得了许多新的、高亲和力的TAR结合蛋白(TBP)(KD约为1.3 - 0.5 nM
然后,我们确定了1.80 nm分辨率的一个变体,TBP6.7,在复杂的共晶体结构,
与TAR,揭示了主要的结合界面由进化的环β2-β3组成,其读出TAR
我们假设包含TBP6.7 β2-β3环或其他TBP环的环肽
TBP6.7 β2-β3结合蛋白是一种新型的TAR结合蛋白。
当与小蛋白SUMO融合时,发夹保留了对TAR的亲和力和特异性,这意味着β2-β3
环是TAR识别的必要和充分条件。
半隐式设计和进化的方法使我们的方法与以前阻止达特-奇塔尔的努力有着根本的不同
相互作用,同时提供了一个强大的实验前提,以追求我们的目标:(目标1)
TBP6.7-BITTAR接口,并确定我们实验室中开发的其他TBPs的其他新的共晶体结构;
(Aim 2)合成并优化源自Aim 1的环肽,其结合TAR并抑制其与
达特;肽(目的3)使用病毒感染性测定来测试来自目的2的环肽以研究作用机制,
治疗指数和药理学特性。据我们所知,没有其他组使用
蛋白进化和结构生物学,开发HIV-11靶向试剂。我们是一个专家团队,
包括两个P.I.s,在蛋白质进化,基于肽的药物发现,HIV治疗
发现,测量生物制剂的细胞渗透和毒性(McNaughton),以及生物制剂的结构生物学
与治疗相关的RNA,蛋白质-RNA复合物,以及蛋白质-RNA相互作用的生物物理分析
(Wedekind),以及两位合作者:哈罗德史密斯(罗切斯特大学),药物发现的领导者
OyaGen Inc.的首席执行官, 一家开发抗HIV药物的私人公司,
(科罗拉多州立大学),一位临床医生和药理学家,在测量药理学方面具有专业知识。
我们拥有独特的资质,非常适合开展这项工作。高价值的成果
包括:(i)鉴定新型HIV先导抑制剂,(ii)验证我们的“半重复设计”和结构
方法,这对药物发现和抑制剂设计领域的持续影响的潜力。
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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Joseph E Wedekind其他文献
Joseph E Wedekind的其他文献
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{{ truncateString('Joseph E Wedekind', 18)}}的其他基金
X-RAY DIFFRACTION ANALYSIS OF METABOLITE SENSING RIBOSWITCHES, G-PROTEIN/SMALL M
代谢物传感核开关、G 蛋白/小 M 的 X 射线衍射分析
- 批准号:
8362270 - 财政年份:2011
- 资助金额:
$ 38.79万 - 项目类别:
ABASIC RESCUE & THE ROLE OF CAT WATERS IN HAIRPIN RIBOZYME MECHANISM OF ACTION
基本救援
- 批准号:
8363520 - 财政年份:2011
- 资助金额:
$ 38.79万 - 项目类别:
EXPERIMENTAL PHASING OF A METABOLITE SENSING RIBOSWITCH
代谢物传感核开关的实验定相
- 批准号:
8170146 - 财政年份:2010
- 资助金额:
$ 38.79万 - 项目类别:
A shared macromolecular X-ray diffraction system in Rochester
罗彻斯特共享的高分子 X 射线衍射系统
- 批准号:
7791902 - 财政年份:2010
- 资助金额:
$ 38.79万 - 项目类别:
ABASIC RESCUE & THE ROLE OF CAT WATERS IN HAIRPIN RIBOZYME MECHANISM OF ACTION
基本救援
- 批准号:
8171498 - 财政年份:2010
- 资助金额:
$ 38.79万 - 项目类别:
CRYSTALLOGRAPHIC ANALYSIS OF HIV-1 VIF IN COMPLEX WITH HUMAN HOST PROTEINS
HIV-1 VIF 与人类宿主蛋白复合物的晶体学分析
- 批准号:
8170268 - 财政年份:2010
- 资助金额:
$ 38.79万 - 项目类别:
X-RAY DIFFRACTION ANALYSIS OF METABOLITE SENSING RIBOSWITCHES, G-PROTEIN/SMALL M
代谢物传感核开关、G 蛋白/小 M 的 X 射线衍射分析
- 批准号:
8170271 - 财政年份:2010
- 资助金额:
$ 38.79万 - 项目类别:
ABASIC RESCUE & THE ROLE OF CAT WATERS IN HAIRPIN RIBOZYME MECHANISM OF ACTION
基本救援
- 批准号:
7955557 - 财政年份:2009
- 资助金额:
$ 38.79万 - 项目类别:
EXPERIMENTAL PHASING OF A METABOLITE SENSING RIBOSWITCH
代谢物传感核开关的实验定相
- 批准号:
7954488 - 财政年份:2009
- 资助金额:
$ 38.79万 - 项目类别:
ABASIC RESCUE & THE ROLE OF CAT WATERS IN HAIRPIN RIBOZYME MECHANISM OF ACTION
基本救援
- 批准号:
7721312 - 财政年份:2008
- 资助金额:
$ 38.79万 - 项目类别:
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