Structural correlates of prestin activity.

prestin 活性的结构相关性。

• 批准号: 7896097
• 负责人: DHASAKUMAR S NAVARATNAM
• 金额: $ 35.17万
• 依托单位: YALE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-01-01 至 2015-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7896097
• 关键词: Accounting; Address; Affect; Amino Acids; Anions; Area; Auditory; Biochemical; Biological; CDK6-associated protein p18; Cell Culture Techniques; Cell Line; Cell Shape; Cell membrane; Cell model; Cells; Cellular biology; Characteristics; Charge; Chimera organism; Chimeric Proteins; Chloride Ion; Chlorides; Data; Dependence; Development; Electric Capacitance; Environment; Family member; Funding; Goals; Hair Cells; Hearing; Lateral; Mammals; Measurement; Measures; Mechanics; Membrane; Methods; Modeling; Molecular; Motor; Movement; Mus; Organ of Corti; Outer Hair Cells; Pathology; Performance; Progress Reports; Proteins; Route; Sampling; Structure; Surface; Temperature; Testing; Time; Work; base; combat; in vivo; interest; millisecond; mutant; protein structure; public health relevance; rat Pres protein; response; sensor; signature molecule; single molecule; trafficking; voltage

DESCRIPTION (provided by applicant): With the identification of prestin as the elusive lateral membrane motor protein of the outer hair cell (OHC), we are faced with the possibility of understanding how this single molecule can affect the mammal's exquisite sense of hearing. To that end, we have focused our interest on determining what protein structures may give rise to the motor's known biophysical attributes, including its temperature, tension, and voltage dependence. We hypothesize that these molecular activities arise and/or are influenced by interactions of prestin's intracellular C and N termini with other intracellular proteins and anions, and possibly by multimeric interactions, as well. We propose to target a focused set of aims, including 1) determine the contribution of prestin's C and N termini to prestin's signature biophysical attributes, 2) determine prestin's trafficking route in a prestin cell line that we have developed, and 3) determine what structures are different between prestin (slc26a5) and its closet family member slc26a6 that account for prestin's nonlinear capacitance. In order to reach these goals, we will employ a host of electrophysiological, molecular biological and biochemical methods. We believe that the information that we obtain through these studies will aid in understanding how the OHC enables us to hear so well and in turn how we might combat pathologies of the OHC that afflict millions. PUBLIC HEALTH RELEVANCE: With the identification of prestin as the elusive lateral membrane motor protein of the outer hair cell (OHC), we are faced with the possibility of understanding how this single molecule can affect the mammal's exquisite sense of hearing. To that end, we have focused our interest on determining what protein structures may give rise to the motor's known biophysical attributes, and how the protein trafficks within the cell. We hypothesize that understanding these molecular activities will aid in understanding how the OHC enables us to hear so well and in turn how we might combat pathologies of the OHC that afflict millions.

描述（由申请人提供）：随着 prestin 被鉴定为外毛细胞 (OHC) 难以捉摸的侧膜运动蛋白，我们面临着了解这种单分子如何影响哺乳动物精致听觉的可能性。为此，我们将兴趣集中在确定哪些蛋白质结构可能会产生电机已知的生物物理属性，包括其温度、张力和电压依赖性。我们假设这些分子活性是由 prestin 的细胞内 C 和 N 末端与其他细胞内蛋白质和阴离子的相互作用产生和/或影响的，也可能是受多聚体相互作用的影响。我们建议针对一组重点目标，包括 1) 确定 prestin 的 C 和 N 末端对 prestin 标志性生物物理属性的贡献，2) 确定我们开发的 prestin 细胞系中 prestin 的运输路线，以及 3) 确定哪些结构prestin (slc26a5) 与其最接近的家族成员 slc26a6 之间存在差异，这导致了 prestin 的非线性电容。为了实现这些目标，我们将采用一系列电生理学、分子生物学和生化方法。我们相信，通过这些研究获得的信息将有助于了解 OHC 如何使我们能够很好地听到声音，以及我们如何对抗困扰数百万人的 OHC 病症。 公共健康相关性：随着 prestin 被鉴定为外毛细胞 (OHC) 难以捉摸的侧膜运动蛋白，我们面临着了解这种单分子如何影响哺乳动物敏锐听觉的可能性。为此，我们的兴趣集中在确定哪些蛋白质结构可能产生马达的已知生物物理属性，以及蛋白质如何在细胞内运输。我们假设，了解这些分子活动将有助于了解 OHC 如何使我们能够拥有如此好的听力，进而帮助我们了解如何对抗困扰数百万人的 OHC 病症。