Result: Comparison with the
PR/amprenavir structure reveals that mutations
D30N,
V32I,
I47V and
I84V in
PR20 alter the size, shape and charge of the S2/S2' pocket in the
PR20/amprenavir complex as described previously for the
PR20/darunavir and
PR20/saquinavir (3UFN) complexes.
Result: The wild type enzymes from HIV-1 and HIV-2 share 39-48% sequence identity; however, several of the mutations in
PR20 exist in the wild type
PR2 sequence including
V32I and
I47V in the S2/S2' subsites.