Function of Protein Methylation in Chromatin and Signaling Regulation

摘要 共价翻译后蛋白修饰(PTM)有助于细胞生理学的各个方面，是一种 哺乳动物细胞中蛋白质功能多样性的主要来源。PTMS的异常调节是一种常见的现象 人类疾病的特征。我们的研究集中在两个重要的PTMS上：赖氨酸和蛋白质甲基化 组氨酸残留物。我们的首要目标是在分子水平上阐明赖氨酸和赖氨酸的生理作用。 组氨酸甲基化信号在染色质生物学、表观遗传学等基础调控中的作用 生物过程，并了解这些机制的破坏如何导致人类疾病。 在这个研究框架内，我们将研究调节组蛋白的酶的生物学和功能。 甲基化动力学，重点是组蛋白H3赖氨酸36(H3K36)的甲基化。超越组蛋白 甲基化后，人们越来越认识到，一些非组蛋白蛋白，包括几个具有明确 赖氨酸甲基化在基因表达和信号转导中起着重要作用。事实上，有可能远远超过 人类基因组中的100个赖氨酸甲基转移酶，以及越来越多的 这些基因的突变或易位与人类疾病有关。因此，放松管制很可能是 非组蛋白甲基化动态平衡在疾病发病机制中起着至关重要的作用。我们将探索 新的酶和非组蛋白甲基化信号通路的生物学和功能。除了……之外 赖氨酸甲基化，其他残基，如组氨酸，也是甲基化的；尽管对 组氨酸甲基化修饰网络。我们将探索蛋白质组氨酸甲基化具有 在信号转导、细胞生物学和疾病发病机制中被低估和重要的作用。为我们的 研究，我们将使用多学科策略，包括生化，分子，蛋白质组，基因组， 细胞和鼠标建模方法。

ABSTRACT Covalent post-translational protein modifications (PTMs) contribute to all aspects of cell physiology and are a major source of protein functional diversity in mammalian cells. Aberrant regulation of PTMs is a common feature of human diseases. Our research focuses on two important PTMs: protein methylation at lysine and histidine residues. Our overarching goal is to elucidate at a molecular level the physiologic roles for lysine and histidine methylation signaling in the regulation of chromatin biology, epigenetics and other fundamental biological processes, and to understand how disruption in these mechanisms contributes to human disease. Within this research framework we will investigate the biology and function of enzymes that regulate histone methylation dynamics, with a focus on methylation at histone H3 lysine 36 (H3K36). Beyond histone methylation, there is a growing appreciation that a number of non-histone proteins, including several with clear roles in gene expression and signal transduction are lysine methylated. Indeed, there are likely far greater than one hundred lysine methyltransferases in the human genome, and an increasing number of examples of mutation or translocation of these genes being linked to human disorders. Thus, it is likely that deregulation in non-histone protein methylation homeostasis plays a crucial role in disease pathogenesis. We will explore the biology and function of new enzymes and non-histone protein methylation signaling pathways. In addition to lysine methylation, other residues like histidine are also methylated; though relatively little is known about the histidine methylation modification network. We will explore the hypothesis that protein histidine methylation has an underappreciated and significant role in signal transduction, cell biology, and disease pathogenesis. For our studies, we will use a multi-disciplinary strategy that include biochemical, molecular, proteomic, genomic, cellular and mouse modeling approaches.