Structural Biology Core

摘要，核心2 破译HIV-1复制周期关键步骤背后的分子机制对于充分 描述病毒的生物学，它与宿主成分的相互作用，以及开发新的抗逆转录病毒 治疗。为了实现这一目标，结构生物学发挥了重要作用，作为对原子水平的理解 大分子结构和动力学，以及结构变化如何影响功能，提供了机械论 对生物大分子工作原理的洞察。结构生物学核心(核心2)将作出贡献 补充专门知识、仪器和资源，用于研究病毒复制周期的关键步骤，如 在个别项目中描述，包括病毒进入/脱壳、整合和成熟/组装。 核心2包括：氢-氚交换-质谱仪(HDX-MS)和交联质谱 光谱(XL-MS)、核磁共振(核磁共振)光谱、单粒子低温电子 显微镜(Cryo-EM)和冷冻电子断层扫描(Cryo-ET)。出现了HDX-MS和XL-MS方法 作为探测蛋白质与溶液中的配体、共调控蛋白质和核酸相互作用的强大工具 在逐个残基的水平上深入了解大分子的行为。核磁共振波谱使 测定中小型蛋白质和核酸的高分辨结构，探测 原子分辨率下的大分子相互作用和构象动力学研究。单粒子低温- EM有助于理解大组装的大分子结构和动力学，通常只需较少的成本 材料，比传统方法更快。冷冻-ET和亚断层图像平均(STA)是理想的 适用于研究不规则物体，如非二十面体蛋白质晶格，其中具有3D体积 在集合平均之前，每个唯一集合的信息对于洞察局部和 长期的结构扰动。 核心2将应用现有的工具来解决各个项目中描述的特定问题，并且每个 实验室还将开发新技术，以满足拟议研究目标的需要。核心拥有 与大多数当前的B-HIVE调查人员建立了合作关系，为新项目制定了工作流程 这可能会在研究期间出现，并将为B-HIVE成员提供持续的咨询和培训 项目发展。已建立的工具为广大用户提供互补和协同的专业知识 中心的研究目标，而培训和传播模块与 国家卫生研究院。

ABSTRACT, CORE 2 Deciphering the molecular mechanisms underlying key steps of the HIV-1 replication cycle is essential to fully describe the biology of the virus, its interplay with host components, and for developing novel antiretroviral therapies. Toward this goal, structural biology plays an important role, as an atomic-level understanding of macromolecular structure and dynamics, and how alterations in structure affect function, provides mechanistic insights into the workings of biological macromolecules. The structural biology core (Core 2) will contribute complementary expertise, instrumentation, and resources for studying key steps of the viral replication cycle, as described within individual projects, including viral entry/uncoating, integration, and maturation/assembly. Core 2 includes: hydrogen deuterium exchange coupled to mass spectrometry (HDX-MS) and cross-linking mass spectrometry (XL-MS), nuclear magnetic resonance (NMR) spectroscopy, single-particle cryo-electron microscopy (cryo-EM), and cryo-electron tomography (cryo-ET). HDX-MS and XL-MS methods have emerged as powerful tools to probe protein interactions with ligands, co-regulatory proteins, and nucleic acids in solution to yield insights into macromolecular behavior on a residue-by-residue level. NMR spectroscopy enables determining high-resolution structures of small-to-medium size proteins and nucleic acids, probing macromolecular interactions at atomic resolution and studying conformational dynamics. Single-particle cryo- EM yields an understanding of macromolecular structure and dynamics for large assemblies, often with less material and more rapidly than with traditional methods. Cryo-ET and sub-tomogram averaging (STA) is ideally suited to studying irregular objects such as non-icosahedral protein lattices, where having 3D volumetric information for each unique assembly, prior to ensemble averaging, is necessary to gain insight into local and long-range structural perturbations. Core 2 will apply existing tools to address specific questions described within individual Projects, and each laboratory will also develop novel technologies to meet the needs of proposed research goals. The Core has established collaborations with most current B-HIVE investigators, has developed workflows for new projects that may emerge during the studies, and will provide ongoing consultation and training to B-HIVE members as projects develop. The established tools provide complementary and synergistic expertise toward the broad research goals of the center, while the training and dissemination module aligns with the broader impacts of the NIH.