Structure and function of integrin TM and CYTO domains

整合素TM和CYTO结构域的结构和功能

• 批准号: 6507842
• 负责人: Renhao Li
• 金额: $ 10.22万
• 依托单位: UNIVERSITY OF PENNSYLVANIA
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6507842
• 关键词: biological signal transduction; cell biology; cell line; cell membrane; confocal scanning microscopy; cytoplasm; integrins; neoplasm /cancer genetics; nuclear magnetic resonance spectroscopy; point mutation; postdoctoral investigator; protein structure; protein structure function; transfection

DESCRIPTION (provided by applicant): The candidate's career goal is to become an independent investigator focused on the molecular mechanisms of the integrin-mediated signaling pathway with an interdisciplinary approach. Many integrins are critically involved in cell development and migration, and accordingly identified as potential drug targets for cancer treatment. In the short term, the candidate seeks to understand the roles of the transmembrane and cytoplasmic (TM-CYTO) domains of integrin alphaIIbbeta3, using a combination of structural and cell biology methods. The results acquired from this study will contribute to a better understanding of cancer biology and the development of anti-cancer agents. To this end, he has initiated studies on the membrane-bound proteins corresponding to alphaIIb and beta3TM-CYTO domains, and hypothesized the significance of homo-oligomerization of these proteins in the context of integrin activation and clustering. The specific aims of this project are: (1) To determine the solution structure of the TM-CYTO domains of ?3 subunit by NMR spectroscopy. (2) To characterize homo-oligomerization of the ?IIb and ?3TM-CYTO domains in biological membranes and identify point mutations that disrupt or enhance self-association. The bacteria-based TOXCAT system will be used for this purpose. (3) To study the effects of homo-oligomerization on alphaIIbbeta3 function in GM1500 B-lymphocytes and/or Chinese hamster ovary cells. The next year or two will be critical for the candidate to polish his research skills, and make a significant contribution to the integrin field, thus allowing for a smooth transition to independence. His sponsor, Dr. William DeGrado, has an excellent mentoring track record. There is a supportive and stimulating atmosphere in the sponsor's lab and the Department of Biochemistry and Biophysics that encourages scientific exchange and collaboration, which is beneficial to the candidate's development as a scientist.

职位描述（由申请人提供）：候选人的职业目标是成为一名独立的研究人员，专注于整合素介导的信号通路的分子机制与跨学科的方法。 许多整合素在细胞发育和迁移中起关键作用，因此被鉴定为癌症治疗的潜在药物靶点。 在短期内，候选人试图了解整合素α IIb β 3的跨膜和胞质（TM-CYTO）结构域的作用，使用结构和细胞生物学方法的组合。 从这项研究中获得的结果将有助于更好地了解癌症生物学和抗癌药物的开发。 为此，他启动了对与alphaIIb和beta3 TM-CYTO结构域对应的膜结合蛋白的研究，并假设这些蛋白在整合素活化和聚集背景下的同源寡聚化的意义。 本课题的具体目标是：（1）确定TM-CYTO结构域的解结构;通过核磁共振光谱法测定3亚基。 (2)为了表征同质寡聚的？IIb和？生物膜中的3 TM-CYTO结构域，并鉴定破坏或增强自缔合的点突变。 将为此目的使用基于细菌的TOXCAT系统。 (3)研究同源寡聚化对GM 1500 B淋巴细胞和/或中国仓鼠卵巢细胞中α IIb β 3功能的影响。 接下来的一两年将是关键的候选人打磨他的研究技能，并作出重大贡献的整合素领域，从而使一个平稳过渡到独立。 他的赞助商威廉·德格拉多博士有着出色的指导记录。 在赞助商的实验室和生物化学和生物物理系有一个支持和激励的氛围，鼓励科学交流和合作，这有利于候选人作为科学家的发展。