Authors: Goebel, Lisa
Kirschner, Tonia
Koska, Sandra
Rai, Amrita
Janning, Petra
Maffini, Stefano
Vatheuer, Helge
Czodrowski, Paul
Goody, Roger S.
Müller, Matthias Philipp
Rauh, Daniel
Title: Targeting oncogenic KRasG13C with nucleotide-based covalent inhibitors
Language (ISO): en
Abstract: Mutations within Ras proteins represent major drivers in human cancer. In this study, we report the structure-based design, synthesis, as well as biochemical and cellular evaluation of nucleotide-based covalent inhibitors for KRasG13C, an important oncogenic mutant of Ras that has not been successfully addressed in the past. Mass spectrometry experiments and kinetic studies reveal promising molecular properties of these covalent inhibitors, and X-ray crystallographic analysis has yielded the first reported crystal structures of KRasG13C covalently locked with these GDP analogues. Importantly, KRasG13C covalently modified with these inhibitors can no longer undergo SOS-catalysed nucleotide exchange. As a final proof-of-concept, we show that in contrast to KRasG13C, the covalently locked protein is unable to induce oncogenic signalling in cells, further highlighting the possibility of using nucleotide-based inhibitors with covalent warheads in KRasG13C-driven cancer.
Issue Date: 2023-04-12
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Appears in Collections:Chemische Biologie

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