PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12464252-0 2003 The enantiomer of progesterone (ent-progesterone) is a competitive inhibitor of human cytochromes P450c17 and P450c21. ent-progesterone 32-48 cytochrome P450 family 17 subfamily A member 1 Homo sapiens 98-105 12464252-7 2003 We conclude that CYP17 accommodates the stereochemically unnatural ent-progesterone better than CYP21. ent-progesterone 67-83 cytochrome P450 family 17 subfamily A member 1 Homo sapiens 17-22 12464252-3 2003 To probe the active site topologies of these related enzymes, we synthesized the enantiomer of progesterone and determined if ent-progesterone is a substrate or inhibitor of CYP17 and CYP21. ent-progesterone 126-142 cytochrome P450 family 17 subfamily A member 1 Homo sapiens 174-179 12464252-4 2003 Neither enzyme metabolizes ent-progesterone; however, ent-progesterone is a potent competitive inhibitor of CYP17 (K(I)=0.2 microM). ent-progesterone 27-43 cytochrome P450 family 17 subfamily A member 1 Homo sapiens 108-113 12464252-4 2003 Neither enzyme metabolizes ent-progesterone; however, ent-progesterone is a potent competitive inhibitor of CYP17 (K(I)=0.2 microM). ent-progesterone 54-70 cytochrome P450 family 17 subfamily A member 1 Homo sapiens 108-113