PROBING ALLOSTERY IN METHYL-LYSINE READER DOMAINS

甲基赖氨酸阅读器结构域中的变构研究 摘要：染色质是组蛋白、RNA和DNA的复合体，它动态地包装 每个真核细胞内的基因组。而细胞系特异性转录因子显然起着主导作用 在基因表达调控中，通过翻译后修饰调节染色质的可及性 组蛋白(PTM)作为药物干预作用的机会，目前引起了人们的极大兴趣 的结合蛋白明显好于在转录因子的直接扰动下小 分子。染色质调节的分子细节才刚刚开始被理解，化学物质 生物学将在促进科学知识和评估治疗方法方面发挥核心作用。 这一领域的机遇。具体地说，细胞穿透性，高质量的化学探针调节调节 对染色质状态的研究具有重要意义。小分子驱动的探索方法的优势 染色质生物学有多种：时间分辨率；机械灵活性；在细胞和 潜在地，在活体内；重要的是，化学探针可能提供立即向药物发现的过渡 努力，可能缩短目标选择和治疗干预之间的几年时间。这是一种 化学探测的结果是同时解决了目标的“验证风险”(即 对靶标的药物调节将在疾病中产生有利的结果)和技术风险( 发现可耐受的调节靶标的分子的可能性)。虽然探测器通常缺少一些 药物所需的特征，他们的发现减少了许多靶标验证和技术风险，并创建了 层叠的分析、结构和机械信息，使后续工作能够专注于 毒品。虽然开发高质量的探测器具有挑战性，但在可用的资源范围内是可以实现的 对学术项目来说，他们的创作是一次奇妙的培训经历。为了最大限度地发挥我们的 我们打算继续在不创造知识产权的情况下分享它们。 我们在甲基赖氨酸大家族中开创了目标级探测器发现策略 (KME)读者。我们在这一领域取得了丰硕成果，并为未来专注于 KME读取区、核苷酸结合区和催化区之间的变构相互作用 来调节染色质的功能。在这一努力中，我们建立了一个有才华的合作者网络， 补充我们在化学生物学、药物化学、体外分析开发方面的优势，以及 生物物理学；具有分子、结构和染色质生物学方面的优势。染色质中的变构相互作用 调节复合体是极其重要的现象，为药理学创造了独特的机会 干预。我们将把未来的努力集中在KME阅读器家族中这一令人兴奋的前沿领域。

PROBING ALLOSTERY IN METHYL-LYSINE READER DOMAINS Abstract: Chromatin is the complex of histone proteins, RNA, and DNA that dynamically packages the genome within each eukaryotic cell. While cell lineage specific transcription factors clearly play a dominant role in the control of gene expression, the regulation of chromatin accessibility via post-translational modifications (PTM) of histones is of great current interest as the opportunities for pharmacological intervention in the action of the associated proteins are significantly better than in the direct perturbation of transcription factors by small molecules. The molecular details of chromatin regulation are just beginning to be understood and chemical biology is poised to play a central role in advancing scientific knowledge and assessing therapeutic opportunities in this field. Specifically, cell penetrant, high-quality chemical probes that modulate the regulation of chromatin state are of great significance. The advantages of a small molecule driven approach to exploring chromatin biology are numerous: temporal resolution; mechanistic flexibility; ease of delivery in cells and potentially, in vivo; and significantly, a chemical probe may provide an immediate transition to a drug discovery effort, possibly cutting years off the time between target selection and therapeutic intervention. This impact of a chemical probe results from simultaneously addressing target ‘validation risk’ (the likelihood that pharmacologic modulation of the target will have a favorable outcome in a disease) and ‘technical risk’ (the likelihood that a tolerable molecule that modulates the target can be discovered). While probes often lack some features required in drugs, their discovery diminishes many target validation and technical risks and creates a cascade of assays, structural and mechanistic information that is enabling to subsequent efforts focused on drugs. While high-quality probes are challenging to develop, they are achievable within the resources available to academic programs, and their creation is a fantastic training experience. To maximize the impact of our probes, we intend to continue our approach of sharing them without creation of intellectual property. We have pioneered a target-class probe discovery strategy within the large family of methyl-lysine (Kme) readers. We have been productive in this area and built momentum for future studies focused on the allosteric interactions between Kme reader domains, nucleotide binding domains, and the catalytic domains that regulate chromatin function. During this effort, we have established a network of talented collaborators that complement our strengths in chemical biology, medicinal chemistry, in vitro assay development, and biophysics; with strengths in molecular, structural and chromatin biology. Allosteric interactions in chromatin regulatory complexes are critically important phenomena that create unique opportunities for pharmacologic intervention. We will focus our future endeavors on this exciting frontier in the Kme reader family.