학술논문
Structure-Based Exploration of Selectivity for ATM Inhibitors in Huntington’s Disease
Document Type
Article
Author
Van de Poël, Amanda; Toledo-Sherman, Leticia; Breccia, Perla; Cachope, Roger; Bate, Jennifer R.; Angulo-Herrera, Ivan; Wishart, Grant; Matthews, Kim L.; Martin, Sarah L.; Peacock, Marcus; Barnard, Amy; Cox, Helen C.; Jones, Graham; McAllister, George; Vater, Huw; Esmieu, William; Clissold, Cole; Lamers, Marieke; Leonard, Philip; Jarvis, Rebecca E.; Blackaby, Wesley; Eznarriaga, Maria; Lazari, Ovadia; Yates, Dawn; Rose, Mark; Jang, Sung-Wook; Muñoz-Sanjuan, Ignacio; Dominguez, Celia
Source
Journal of Medicinal Chemistry; April 2021, Vol. 64 Issue: 8 p5018-5036, 19p
Subject
Language
ISSN
00222623; 15204804
Abstract
Our group has recently shown that brain-penetrant ataxia telangiectasia-mutated (ATM) kinase inhibitors may have potential as novel therapeutics for the treatment of Huntington’s disease (HD). However, the previously described pyranone-thioxanthenes (e.g., 4) failed to afford selectivity over a vacuolar protein sorting 34 (Vps34) kinase, an important kinase involved with autophagy. Given that impaired autophagy has been proposed as a pathogenic mechanism of neurodegenerative diseases such as HD, achieving selectivity over Vps34 became an important objective for our program. Here, we report the successful selectivity optimization of ATM over Vps34 by using X-ray crystal structures of a Vps34-ATM protein chimera where the Vps34 ATP-binding site was mutated to approximate that of an ATM kinase. The morpholino-pyridone and morpholino-pyrimidinone series that resulted as a consequence of this selectivity optimization process have high ATM potency and good oral bioavailability and have lower molecular weight, reduced lipophilicity, higher aqueous solubility, and greater synthetic tractability compared to the pyranone-thioxanthenes.