Molecular basis of human ATM kinase inhibition

Autor: U Pehl, M. Rotheneder, T Fuchß, K. Stakyte, Joseph Bartho, Karl-Peter Hopfner, E van de Logt, Ulrich Grädler, Aaron Alt, Katja Lammens
Rok vydání: 2021
Předmět:
Zdroj: Nature Structural & Molecular Biology. 28:789-798
ISSN: 1545-9985
1545-9993
DOI: 10.1038/s41594-021-00654-x
Popis: 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 A, 2.8 A and 3.0 A 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. High-resolution cryo-EM structures of human ATM bound to ATPγS and two distinct ATM inhibitors provide insights into the mechanism of inhibitor selectivity and offer a framework for structure-based drug design.
Databáze: OpenAIRE
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