SUMO conjugation in cell biology and Development

细胞生物学和发育中的相扑结合

• 批准号: 7569505
• 负责人: ALBERT J COUREY
• 金额: $ 23.89万
• 依托单位: UNIVERSITY OF CALIFORNIA LOS ANGELES
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2010-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7569505
• 关键词: Affinity; Animal Model; Biochemical; Biogenesis; Biological; Biological Phenomena; Biological Process; Cell Nucleus; Cells; Cellular biology; Chromatin Structure; Complex; Databases; Development; Disease model; Drosophila genus; Drosophila melanogaster; Embryo; Embryonic Development; Embryonic Pattern Specification; Enzymes; Epigenetic Process; Genes; Genetic; Genotype; Goals; Homeobox Genes; Huntington Disease; Inheritance Patterns; JUN gene; Malignant Neoplasms; Mass Spectrum Analysis; Mediating; Natural Immunity; Nerve Degeneration; Neurodegenerative Disorders; Oncogene Proteins; Organism; Pathway interactions; Pattern Formation; Play; Polycomb; Post-Translational Protein Processing; Process; Protein p53; Proteins; Proteomics; Regulation; Repression; Research; Role; SAM Domain; Specificity; Staging; Structure; Sumoylation Pathway; System; Techniques; Testing; Transcriptional Regulation; Transgenes; Tumor Suppressor Proteins; Ubiquitin Like Proteins; Wing; biological adaptation to stress; fitness; flexibility; fly; genetic regulatory protein; human Huntingtin protein; human disease; protein folding; research study

DESCRIPTION (provided by applicant): Project Summary: SUMO is a ubiquitin-like protein that is reversibly conjugated to a wide variety of target proteins, thereby serving as a flexible switch to control protein subcellular localization and biochemical activity. SUMO conjugation ("sumoylation") plays central roles in many crucial biological processes including epigenetic inheritance and pattern formation. The long-term goal of this research is to illuminate the connections between sumoylation and these biological phenomena using the easily manipulated model organism Drosophila melanogaster. The specific aims are: 1. To determine the role of SUMO in Polycomb Group (PcG) function. PcG factors play essential roles in maintaining the silent epigenetic state of genes that regulate development. Two PcG factors, Ph and Scm, appear to be regulatory targets of sumoylation. Genetic, cell biological, and biochemical approaches will be employed to make mechanistic connections between the sumoylation of these proteins and transcriptional silencing. 2. To carry out a system wide analysis of the effects of genotype and developmental stage on the spectrum of SUMO-conjugated proteins. The pleiotropic roles of SUMO suggest the existence of many unidentified SUMO conjugation targets. Proteomic techniques will be used to characterize the spectrum of SUMO conjugated proteins in the intact organism as a function of genotype and developmental stage. The creation of a multi-dimensional database of SUMO-conjugated proteins will allow us to test hypotheses about how SUMO conjugating and deconjugating enzymes determine the specificity of conjugation, and about the role of SUMO in such processes as protein biogenesis, epigenetic transcriptional control, and embryogenesis. Relevance: The sumoylation pathway has been implicated in both neurodegenerative disorders and cancer. For example, sumoylation of Huntingtin, the pathogenic protein in Huntington's disease, exacerbates neurodegeneration in a Drosophila model of this disease. Furthermore, the sumoylation of numerous oncoproteins (c-jun, elk-1, and TEL) and tumor suppressor proteins (p53, RB, and PML) modulates their function. Consequently, the research proposed here will advance our understanding of human disease.

描述(由申请人提供)：项目摘要：相扑是一种泛素样蛋白，可与多种目标蛋白可逆结合，从而成为控制蛋白质亚细胞定位和生化活性的灵活开关。相扑接合(“相扑”)在包括表观遗传和模式形成在内的许多重要的生物学过程中起着核心作用。这项研究的长期目标是使用易于操纵的模式生物黑腹果蝇来阐明苏莫化和这些生物现象之间的联系。具体目的是：1.确定相扑在PcG功能中的作用。PCG因子在维持调节发育的基因的沉默表观遗传状态方面发挥着至关重要的作用。Ph和SCm这两个PcG因子似乎是苏木糖基化的调节靶点。遗传、细胞生物学和生化方法将被用来在这些蛋白质的总甲基化和转录沉默之间建立机械性的联系。2.系统分析不同基因和发育阶段对SUMO结合蛋白谱的影响。相扑的多效性表明，存在许多未知的相扑共轭靶标。蛋白质组学技术将被用来表征完整生物体中相扑结合蛋白的光谱，作为基因和发育阶段的函数。相扑结合蛋白多维数据库的建立将使我们能够检验相扑结合和去结合酶如何决定接合的特异性，以及相扑在蛋白质生物发生、表观遗传转录控制和胚胎发生等过程中的作用。相关性：苏莫化途径与神经退行性疾病和癌症都有关联。例如，亨廷顿病的致病蛋白亨廷顿蛋白的苏莫化会加剧这种疾病的果蝇模型的神经退化。此外，许多癌蛋白(c-jun、elk-1和tel)和肿瘤抑制蛋白(p53、Rb和PML)的总和作用调节它们的功能。因此，这里提出的研究将促进我们对人类疾病的理解。