Molecular basis of human ATM kinase inhibition
Stakyte K, Rotheneder M, Lammens K, Bartho JD, Grädler U, Fuchß T, Pehl U, Alt A, van de Logt E, Hopfner KP (2021) Molecular basis of human ATM kinase inhibition. Nat Struct Mol Biol. 2021 Sep 23. doi: 10.1038/s41594-021-00654-x. PMID: 34556870
Abstract cited directly from the article:
Human checkpoint kinase ataxia telangiectasia-mutated (ATM) plays a key role in initiation of the DNA damage response following DNA double-strand breaks. ATM inhibition is a promising approach in cancer therapy, but, so far, detailed insights into the binding modes of known ATM inhibitors have been hampered due to the lack of high-resolution ATM structures. Using cryo-EM, we have determined the structure of human ATM to an overall resolution sufficient to build a near-complete atomic model and identify two hitherto unknown zinc-binding motifs. We determined the structure of the kinase domain bound to ATPγS and to the ATM inhibitors KU-55933 and M4076 at 2.8 Å, 2.8 Å and 3.0 Å resolution, respectively. The mode of action and selectivity of the ATM inhibitors can be explained by structural comparison and provide a framework for structure-based drug design.