Peroxisomal impacts on cellular quality control

项目总结-过氧化物酶体对细胞质量控制的影响 职业目标：候选人的长期职业目标是成为一名大学教授， 联合收割机研究细胞质量控制与教育下一代科学家和增加 学院的多样性。她设计了她的博士后培训，以补充她的研究生 转录组学经验与蛋白质组学，生物化学和细胞生物学的经验，以解决她 研究问题，同时成为一个全面的生物学家。 培训环境：莱斯大学拥有优秀的培训环境，支持跨学科 和机构间研究与其他得克萨斯州医疗中心机构，包括充分利用共享 国家的最先进的设备，同时保持一个亲密的研究环境，包括教学法， 专业沟通和就业市场准备培训。邦妮·巴特尔博士，项目导师 培养一个支持性的环境，促进科学和专业发展。她有一个 在植物激素、microRNA和 过氧化物酶体 研究：该项目的目标是利用最近的发现，功能性过氧化物酶体是靶向的 当过氧化物酶体伴侣和蛋白酶 LON 2蛋白功能失调。这一发现表明，过氧化物酶体信号，促进 pexophagy被LON 2降解或重折叠。这些实验旨在揭示 控制过氧化物酶体周转的机制，以确定这种周转如何促进整体细胞 健康，并确定过氧化物酶体功能障碍如何向其他细胞器发出信号。几个互连 将采用各种方法来实现这些目标。首先，将鉴定LON 2底物， 其特征在于，包括伴侣蛋白、蛋白酶和促进噬菌作用的底物。第二，蛋白质组 将对功能失调的过氧化物酶体的细胞景观进行调查，以确定差异积累的 蛋白质和其他重要细胞器的相关改变。第三，将分析转录组， 识别从过氧化物酶体到细胞核的逆行信号，包括转录反应 当过氧化物酶体受损时会诱发。这些研究将结合预测模型 并提供了对调节摄食和细胞信号反应的信号成分的深入了解 当食人花被加强或阻止时会发生。过氧化物酶体功能的许多方面 广泛保守，这些利用拟南芥模型优势的实验可能会提供 有助于理解人类过氧化物酶体生物合成障碍的病因学。

PROJECT SUMMARY – Peroxisomal impacts on cellular quality control Career Goals: The candidate’s long-term career goal is to become a university professor, where she can combine research in cellular quality control with educating the next generation of scientists and increasing diversity in the academy. She has designed her postdoctoral training to complement her graduate transcriptomics experience with experience in proteomics, biochemistry, and cell biology to address her research questions while becoming a well-rounded biologist. Training Environment: Rice University has an excellent training environment that supports interdisciplinary and inter-institutional research with other Texas Medical Center institutions, including full access to shared state-of-the-art equipment, while maintaining an intimate research setting inclusive of pedagogy, professional communication, and job market preparedness trainings. Dr. Bonnie Bartel, the project mentor, fosters a supportive environment that promotes scientific and professional development. She has an extensive publication and training record at the forefront of discoveries in phytohormones, microRNAs, and peroxisomes. Research: The goal of this project is to leverage the recent finding that functional peroxisomes are targeted for destruction by overzealous autophagy machinery when the peroxisomal chaperone and protease protein, LON2, is dysfunctional. This finding suggests the hypothesis that peroxisomal signals that promote pexophagy are degraded or refolded by LON2. The proposed experiments are designed to uncover mechanisms controlling peroxisomal turnover, to determine how this turnover facilitates overall cellular health, and to identify how peroxisome dysfunction signals to other organelles. Several interconnected approaches will be employed to achieve these goals. First, LON2 substrates will be identified and characterized, including chaperone, protease, and pexophagy-promoting substrates. Second, the proteomic landscape of cells housing dysfunctional peroxisomes will be surveyed to identify differentially accumulated proteins and associated alterations in other essential organelles. Third, transcriptomes will be analyzed to identify retrograde signaling from the peroxisomes to the nucleus, including the transcriptional responses that are induced when peroxisomes are compromised. These studies will incorporate predictive modeling and provide insight into the signaling components regulating pexophagy and cellular signaling responses that ensue when pexophagy is heightened or prevented. As many aspects of peroxisomal function are widely conserved, these experiments exploiting the advantages of the Arabidopsis model will likely provide insights useful for understanding the etiology of human peroxisome biogenesis disorders.