Mechanisms of coordinated actin and microtubule dynamics

协调肌动蛋白和微管动力学的机制

• 批准号: 9797189
• 负责人: Jessica L. Henty-Ridilla
• 金额: $ 39.22万
• 依托单位: UPSTATE MEDICAL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9797189
• 关键词: Actins; Alzheimer' s Disease; Amyotrophic Lateral Sclerosis; Binding; Binding Proteins; Biochemistry; Biological Assay; Biological Process; CLIP-170 gene; Cell division; Cell physiology; Cellular biology; Color; Complex; Cytoskeleton; Disease; Goals; Huntington Disease; Individual; Label; Liquid substance; Malignant Neoplasms; Microfilaments; Microtubules; Molecular; Monitor; Morphogenesis; Movement; Phagocytosis; Physiological; Proteins; Research; Testing; cell motility; cell type; genetic regulatory protein; imaging system; insight; microscopic imaging; nervous system disorder; profilin; protein aggregate; single molecule

Project Summary/Abstract The cytoskeleton consists of several filamentous proteins including actin filaments and microtubules, that regulate nearly all vital cell processes including: cell division, morphogenesis, phagocytosis, and movement/motility. Exactly how the activities of actin and microtubules are coordinated to carry out these cell processes is not fully understood. The goal of this research is to determine how the dynamics of the actin and microtubules are coordinated in two ways: 1) by a group of regulatory proteins that bind to actin and MTs and also interact with each other: CLIP-170, mDia1, EB1, and IQGAP1; and 2) through the formation of disease- relevant protein aggregates (liquid droplets). This project uses classical biochemistry and cell biology assays combined with a unique 4-color advanced microscopy imaging system that permits the simultaneous monitoring of purified actin and microtubules with fluorescently labeled single molecules of interacting proteins to illuminate detailed molecular mechanisms. We will further test the physiological and disease-relevance of these mechanisms during critical cell processes (i.e. cell division and migration) in several cell types. This research will advance a dynamic and emerging field by defining complex molecular interactions and mechanisms of microtubule-actin crosstalk that underlie a host of fundamental biological processes and neurological disease.

项目摘要/摘要 细胞骨架由几种丝状蛋白组成，包括肌动蛋白丝和微管，这些蛋白质， 调节几乎所有重要的细胞过程，包括：细胞分裂，形态发生，吞噬作用和 运动/运动。确切的肌动蛋白和微管的活动如何协调以执行这些细胞 过程尚未完全理解。这项研究的目的是确定肌动蛋白和 微管以两种方式协调：1）一组与肌动蛋白和MT的调节蛋白以及 也相互作用：clip-170，mdia1，eb1和iqgap1; 2）通过疾病形成 相关的蛋白质聚集体（液滴）。该项目使用经典的生物化学和细胞生物学测定法 结合独特的4色高级显微镜成像系统，该系统允许同时监视 纯化的肌动蛋白和微管的荧光标记的相互作用蛋白的单分子以照明 详细的分子机制。我们将进一步测试这些 关键细胞过程中的机制（即细胞分裂和迁移）在几种细胞类型中。这项研究 通过定义复杂的分子相互作用和机制，将推进动态和新兴领域 微管 - 肌动蛋白串扰是基本生物学过程和神经系统疾病的基础。