Crystal structure of human purine nucleoside phosphorylase mutant H257F with Imm-H

Neighboring Group Participation in the Transition State of Human Purine Nucleoside Phosphorylase

MENGYTYEDYKNTAEWLLSHTKHRPQVAIICGSGLGGLTDKLTQAQIFDYSEIPNFPRSTVPGHAGRLVFGFLNGRACVM
MQGRFHMYEGYPLWKVTFPVRVFHLLGVDTLVVTNAAGGLNPKFEVGDIMLIRDHINLPGFSGQNPLRGPNDERFGDRFP
AMSDAYDRTMRQRALSTWKQMGEQRELQEGTYVMVAGPSFETVAECRVLQKLGADAVGMSTVPEVIVARHCGLRVFGFSL
ITNKVIMDYESLEKANFEEVLAAGKQAAQKLEQFVSILMASIPLPDKAS

0.1 M Sodium Acetate, 4.0 M Ammonium Acetate, pH 4.6, VAPOR DIFFUSION, SITTING DROP, temperature 298K

Structure of the same protein H257D mutant with ImmH

Structure of the same protein H257G mutant

Structure of the same protein H257D mutant with DADMe-ImmH

Structure of the same protein H257G mutant with DADMe-ImmH

HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS

purine nucleoside phosphorylase, TRANSFERASE

MENGYTYEDYKNTAEWLLSHTKHRPQVAIICGSGLGGLTDKLTQAQIFDYGEIPNFPRSTVPGHAGRLVFGFLNGRACVM
MQGRFHMYEGYPLWKVTFPVRVFHLLGVDTLVVTNAAGGLNPKFEVGDIMLIRDHINLPGFSGQNPLRGPNDERFGDRFP
AMSDAYDRTMRQRALSTWKQMGEQRELQEGTYVMVAGPSFETVAECRVLQKLGADAVGMSTVPEVIVARHCGLRVFGFSL
ITNKVIMDYESLEKANHEEVLAAGKQAAQKLEQFVSILMASIPLPDKAS