Abstract: This work describes the X-ray crystal structures of complexes of atazanavir with two HIV-1
protease variants, namely, (i) an enzyme optimized for resistance to autolysis and oxidation, referred to as the cleavage-resistant mutant (CRM); and (ii) the
M46I/
V82F/
I84V/
L90M mutant of the CRM enzyme, which is resistant to all approved HIV-1
protease inhibitors, referred to as the inhibitor-resistant mutant.