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Assay Detail

CHEMBL3705980

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Binding
Inhibition Assay: Assay method was adopted from a published protocol with some modifications to suit our requirements (Dmitry N Grigoryev et al, Analytical Biochemistry, (1999) 267, 319-330). The conversion of 17-alpha -hydroxy pregnenolone to Dehydroepiandrosterone is accompanied by the release of acetic acid. In the Cyp17 lyase assay, 17-alpha -hydroxy pregnenolone labeled with tritium (3H) at position 21 is used as the substrate. Chloroform extraction removes the radioactive steroids and acetic acid is taken into aqueous layer. The tritiated acetic acid released in the assay thus extracted is quantified to determine the enzyme activity.Initial buffer conditions were, 50 mM Phosphate buffer, pH 7.5 was used as the starting buffer for Cyp17 lyase activity based on the data published in US patent publication No. US2004/0198773 A1. This buffer was found to be suitable for regular Cyp17 lyase assay. Human Cyp 17 gene was cloned and expressed in Adenoviral expression system in A549 cell lines.
50
Total Activities
50
Compounds Tested
1
Activity Types
0
Assay Parameters

Assay Information

Assay Type Binding
Organism Homo sapiens
Cell Type A549
Confidence 9 — Direct single protein target
Curated By Autocuration

Target

Steroid 17-alpha-hydroxylase/17,20 lyase (CHEMBL3522)
Type SINGLE PROTEIN
Organism Homo sapiens

Publication

17α-hydroxylase/C17,20-lyase inhibitors
(2015)

Activity Statistics

Type Count Avg pChEMBL Best pChEMBL
IC50 50 7.57 8.72

Compounds Tested

Compound Name Phase Activities Best pChEMBL
CHEMBL3677969 1 8.72
CHEMBL3677940 1 8.57
CHEMBL3677971 1 8.32
CHEMBL3677960 1 8.30
CHEMBL3677970 1 8.28
CHEMBL3677947 1 8.22
CHEMBL3677927 1 8.22
CHEMBL3677951 1 8.22
CHEMBL3677972 1 8.22
CHEMBL3677936 1 8.17
CHEMBL3677955 1 8.16
CHEMBL3677937 1 8.15
CHEMBL3677943 1 8.15
CHEMBL3639767 1 8.10
CHEMBL3677924 1 8.05
CHEMBL3677968 1 8.00
CHEMBL3677934 1 7.96
CHEMBL3677962 1 7.92
CHEMBL3677953 1 7.92
CHEMBL3677928 1 7.89
CHEMBL3677957 1 7.89
CHEMBL3677926 1 7.89
CHEMBL3677942 1 7.77
CHEMBL3677945 1 7.72
CHEMBL3677965 1 7.66
CHEMBL3677930 1 7.66
CHEMBL3677925 1 7.58
CHEMBL3677935 1 7.58
CHEMBL3677959 1 7.57
CHEMBL3677946 1 7.52

Activity Data

Compound Name Type Rel. Value Units pChEMBL
CHEMBL3677969 IC50 = 1.9 nM 8.72
CHEMBL3677940 IC50 = 2.7 nM 8.57
CHEMBL3677971 IC50 = 4.75 nM 8.32
CHEMBL3677960 IC50 = 5.0 nM 8.30
CHEMBL3677970 IC50 = 5.2 nM 8.28
CHEMBL3677947 IC50 = 6.0 nM 8.22
CHEMBL3677927 IC50 = 6.0 nM 8.22
CHEMBL3677951 IC50 = 6.0 nM 8.22
CHEMBL3677972 IC50 = 6.0 nM 8.22
CHEMBL3677936 IC50 = 6.7 nM 8.17
CHEMBL3677955 IC50 = 6.9 nM 8.16
CHEMBL3677937 IC50 = 7.0 nM 8.15
CHEMBL3677943 IC50 = 7.0 nM 8.15
CHEMBL3639767 IC50 = 8.0 nM 8.10
CHEMBL3677924 IC50 = 9.0 nM 8.05
CHEMBL3677968 IC50 = 10.0 nM 8.00
CHEMBL3677934 IC50 = 11.0 nM 7.96
CHEMBL3677962 IC50 = 12.0 nM 7.92
CHEMBL3677953 IC50 = 12.0 nM 7.92
CHEMBL3677928 IC50 = 13.0 nM 7.89
CHEMBL3677957 IC50 = 13.0 nM 7.89
CHEMBL3677926 IC50 = 13.0 nM 7.89
CHEMBL3677942 IC50 = 17.0 nM 7.77
CHEMBL3677945 IC50 = 19.0 nM 7.72
CHEMBL3677930 IC50 = 22.0 nM 7.66
CHEMBL3677965 IC50 = 22.0 nM 7.66
CHEMBL3677925 IC50 = 26.0 nM 7.58
CHEMBL3677935 IC50 = 26.0 nM 7.58
CHEMBL3677959 IC50 = 27.0 nM 7.57
CHEMBL3677946 IC50 = 30.0 nM 7.52
CHEMBL3677966 IC50 = 36.0 nM 7.44
CHEMBL3677929 IC50 = 41.0 nM 7.39
CHEMBL3677931 IC50 = 42.0 nM 7.38
CHEMBL3677956 IC50 = 45.0 nM 7.35
CHEMBL3677961 IC50 = 48.0 nM 7.32
CHEMBL3677938 IC50 = 58.0 nM 7.24
CHEMBL3677964 IC50 = 70.0 nM 7.16
CHEMBL3677939 IC50 = 76.0 nM 7.12
CHEMBL3677963 IC50 = 84.0 nM 7.08
CHEMBL3677933 IC50 = 99.0 nM 7.00
CHEMBL3677941 IC50 = 106.0 nM 6.97
CHEMBL3677932 IC50 = 121.0 nM 6.92
CHEMBL3677950 IC50 = 161.0 nM 6.79
CHEMBL3677952 IC50 = 169.0 nM 6.77
CHEMBL3677954 IC50 = 184.0 nM 6.74
CHEMBL3677958 IC50 = 341.0 nM 6.47
CHEMBL3677967 IC50 = 397.0 nM 6.40
CHEMBL3677948 IC50 = 461.0 nM 6.34
CHEMBL3677949 IC50 = 548.0 nM 6.26
CHEMBL3677944 IC50 = 1213.0 nM 5.92