Targeting Metal-Dependent Epigenetic Modulators via MetalloPROTACs

项目摘要。虽然最近的努力已经确定了能够灭活的方法的需求 癌蛋白，目前的干预策略已使大部分蛋白质组“无法下药”。作为回应， NCI已经认识到了PAR-22-216中概述的这一挑战，通过激励开发新的 基于肿瘤发生过程中激活的特定信号通路的分子靶向药物 或肿瘤进展。该计划提出了实现这些目标的重要下一步，通过提供 异双功能分子诱导表达的快速开发和表征平台 新型分子靶向剂对肿瘤相关金属酶的降解。在这个节目中，我们的团队 将开发针对嵌合体的蛋白水解酶(PROTAC)，其中包含最先进的金属结合 药效团(Mbps)，最终目标是实现Juonji C结构域的异构体选择性降解 含有赖氨酸去甲基酶。目前抑制保守催化结构域Jumonjis(JMJCs)的策略 涉及靶向α-酮戊二酸(2OG)底物-接受JMJCs的活性部位的抑制剂，可以 与活性中心中的铁离子配位。靶向JMJCs的组蛋白结合辅助结构域产生 额外的异构体选择性。然而，没有任何抑制剂被证明只对一种异构体具有选择性。 JMJC。我们选择采取有针对性的退化方法，以增加 通过招募E3连接酶进行外周相互作用。这个项目将演示潜在的蛋白质是如何- 由这些嵌合体诱导的蛋白质相互作用可以被用来诱导选择性地降解 金属蛋白通过合理的MBP和连接子设计，将成为 癌症生物学的研究，以及为未来治疗剂的发展奠定基础。

Project Summary. While recent efforts have identified the need for methodologies capable of inactivating oncoproteins, current intervention strategies have left much of the proteome “undruggable.” In response the NCI has recognized this challenge as outlined in PAR-22-216 by incentivizing the development of new molecular targeting agents based on specific signaling pathways activated during the process of tumorigenesis or tumor progression. This program proposes an important next step in reaching these goals by providing a platform for the rapid development and characterization of heterobifunctional molecules capable of inducing degradation of cancer related metalloenzymes with new molecular targeting agents. In this program, our team will develop proteolysis targeting chimeras (PROTACs) containing state-of-the-art metal-binding pharmacophores (MBPs) with the ultimate goal of achieving isoform-selective degradation of jumonji C-domain containing lysine demethylases. Current strategies to inhibit conserved catalytic domain Jumonjis (JMJCs) involve targeting the α-ketoglutaric acid (2OG) substrate-accepting active site of JMJCs with inhibitors that can coordinate to the iron ion in the active site. Targeting the histone-binding helper domain of JMJCs generates additional isoform selectivity. However, no inhibitor has been shown to be selective for only one isoform of JMJCs. We have chosen to take a targeted degradation approach in order to increase the surface area of the peripheral interaction by recruiting an E3 ligase. This program will demonstrate how the potential protein- protein interaction induced by these chimeras can be leveraged to induce selective degradation of metalloproteins (`MetalloPROTACs') through rational MBP and linker design and will serve as a platform for the study of cancer biology, as well as laying the foundation for future development of therapeutic agents.