## Endpoint to Predict
- Endpoint scope: assay
- Measurement type: IC50
- Label type: continuous
- Binary semantics: pchembl
- Assay description: Pim-1 Kinase Inhibition Assay: One illustrative manner in which Pim-1 kinase activity can be determined is by quantifying the amount of ATP remaining in solution after an in vitro Pim-1 kinase reaction. The Kinase-Glo Assay Kit (Promega, Inc., Madison, Wis.) allows this. The amount of ATP remaining in the solution after the kinase reaction serves as a substrate for the luciferase to catalyze luciferin to oxyluciferin plus one photon of light. Thus, the luminescent signal read by the Luminoskan Ascent Instrument (Thermo Electron Corp., Milford, Mass.) correlates with the amount of ATP present after the kinase reaction and inversely correlates with the amount of kinase activity. This assay is efficient at determining the IC50 values of kinase inhibitors against the Pim-1 kinase. These assays are set up in duplicate 50 ul volumes in white, flat bottom 96 well plates. Inhibitors are added to the solution of 1× kinase buffer, 10 uM ATP, 100 uM Pim-1-specific substrate, 50 ng of active Pim-1 enzyme, and water in serial dilutions ranging from micromolar to nanomolar concentrations. This solution is incubated at 30 degrees Celsius at 360 rpm for two hours. Following the incubation, 50 ul of Kinase-Glo reagent is added to each well, including all positive and negative control wells, and incubated at room temperature for 15 minutes. The plate is then read by the Luminoskan Ascent instrument and the results displayed with the Ascent Software version 2.6. The IC50 values can then be calculated for each inhibitor tested. For Ki determination, PIM-1 were incubated with 10-dose, 3-fold serial dilutions of compound starting with 10 μM using 5 different concentrations of ATP (25, 50, 100, 250 and 500 μM ATP for PIM-1; 5, 10, 20, 50 and 100 μM ATP for PIM-2 and PIM-3), and the activity was measured at 0, 5, 10, 15, 20, 30, 45, 60, 75, 90, 105 and 120 minutes. The data was analyzed in a Michaelis-Menton plot to determine apparent Km and Ki values using GraFit software using a mixed inhibition equation for global fit.
- Target name: Serine/threonine-protein kinase pim-1
- Target type: SINGLE PROTEIN
- Target organism: Homo sapiens

## Reference Molecule A
- Canonical SMILES: CC(C)(O)[C@H]1CC[C@H](Nc2ccn3ncc(-c4cccc(OC(F)(F)F)c4)c3n2)CC1
- Properties:
- ChEMBL ID: CHEMBL3355546
- Molecule type: Small molecule
- Molecular weight: 434.46
- Heavy atoms: 31
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 5
- TPSA: 71.68
- LogP: 5.04
- Rotatable bonds: 5
- Ring count: 4
- Aromatic rings: 3
- Formal charge: 0
- Fraction Csp3: 0.45
- QED: 0.59

## Known Reference Result on This Endpoint
- Molecule A clean result: median pChEMBL = 6.69
- This result is provided as context for predicting Molecule B on the same endpoint.

## Reference Molecule A Other ChEMBL Evidence
- type IC50; relation =; value 204; units nM; pChEMBL 6.69; comment 987973

## Query Molecule B
- Canonical SMILES: OC[C@H]1CC[C@H](Nc2ccn3ncc(-c4cccc(OC(F)(F)F)c4)c3n2)CC1
- Properties:
- ChEMBL ID: CHEMBL5986225
- Molecular weight: 406.41
- Heavy atoms: 29
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 5
- TPSA: 71.68
- LogP: 4.26
- Rotatable bonds: 5
- Ring count: 4
- Aromatic rings: 3
- Formal charge: 0
- Fraction Csp3: 0.4
- QED: 0.66

## Molecule Similarity
- Weighted Tanimoto: 0.79

Answer: 6.42