Correction to: Nature Chemical Biology, published online 3 August 2020.

In the version of this Article originally published, cell line SKW3 was incorrectly referred to as SKN3 in Extended Data Fig. 10a–c, the Reporting Summary and the Methods section of the text. In the Methods, one instance was in the ‘Cell lines and generation of mutants’ section and the other was in the ‘Cyclin K degradation-sensitivity correlations and synergy experiments’ section. Additionally, panel letters ai were missing in Fig. 3. The errors have been corrected.