Fig. 4: Overlay of ATP competitive inhibitors of PLK1 obtained to date and highlighting the distinct binding modes observed.
From: Structural regulation of PLK1 activity: implications for cell cycle function and drug discovery

The binding mode of an ATP analogue with carbon atoms highlighted in yellow is shown for reference. Magenta represents BI2536, volasertib and similar ligands; cyan represents onvansertib and similar ligands; green (2OWB) is a 1,5-dihydropyrrolo[3,4-c]pyrazole derivative.