Chemical Genetic Analysis of RAS Signaling

RAS 信号转导的化学遗传学分析

• 批准号: 10642578
• 负责人: Dustin J Maly
• 金额: $ 4.11万
• 依托单位: UNIVERSITY OF WASHINGTON
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-04-01 至 2026-02-28
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10642578
• 关键词: Behavior; Cell physiology; Cells; Chemicals; Complex; Conflict (Psychology); Dose; Environment; Enzymes; Eukaryota; GTP Binding; Guanosine Triphosphate Phosphohydrolases; Malignant Neoplasms; Mediating; Molecular; Oncogenic; Permeability; Play; Process; Role; Signal Transduction; T-Cell Development; Work; chemical genetics; genetic analysis; inhibitor; migration; mutant; novel; phosphoproteomics; small molecule; tool; transcriptomics

Abstract The GTPase RAS functions as a molecular “on/off” switch, existing both in GDP-bound (inactive) and GTP- bound forms (active). Despite functioning as a simple binary switch, RAS is capable of directing complex and diverse cellular processes, including proliferation, migration, survival, and T-cell development. Recent work suggests that the ability of RAS to play complex, often conflicting roles in diverse processes results from differences in cellular context and and/or subcellular localization of its signaling. We have developed a novel chemical genetic tool–called Chemically-Inducible Activator of RAS (CIAR)–to study the dynamics of the signaling networks that are mediated by RAS activity. CIAR allows rapid and dose-dependent activation of RAS signaling with a cell permeable small molecule. With CIAR, we propose to use targeted, quantitative phosphoproteomics and transcriptomics to study the fundamental dynamic behavior of RAS-driven signaling. Subcellularly-localized versions of CIAR will be used to determine the effects of localized RAS activation on the dynamics of RAS-mediated signaling. We will also delineate the interplay between WT RAS and oncogenic RAS signaling and the contribution of WT RAS-mediated signaling to direct inhibitors of oncogenic RAS mutants. Finally, we will develop and use a chemically-controlled toolset for the rapid activation of signaling enzyme oligomers, which will be used to dissect the role that oligomerization state plays in RAS signaling dynamics.

摘要