(a) Compound 1 binds to the central donut
cavity of
DCAF1 in two orientations. In both crystal structures, the protonated
imidazoline moiety makes a hydrogen bond, with the carbonyl of T1097
in pose 1 (PDB ID: 8OG6, cyan) and with the carboxyl moiety of D1356
side chain in pose 2 (PDB ID: 8OG5, green). The hydrogen bonds are
shown as dashed black lines. (b) Overlay of crystal structure of 1 bound to DCAF1 (PDB ID: 8OG6, cyan) and to EED (PDB ID:
5H25, orange). The three residues forming the aromatic cages in EED
are labeled.