PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24411201-4 2014 These structure-activity relationships are consistent with an X-ray structure of a representative compound bound in the AKR1C3 active site, which showed H-bonding between the carbonyl oxygen of the drug and Tyr55 and His117 in the "oxyanion hole" of the enzyme, with the piperazine bridging unit providing the correct twist to allow the terminal benzene ring to occupy the lipophilic pocket and align with Phe311. Piperazine 271-281 aldo-keto reductase family 1 member C3 Homo sapiens 120-126