## Endpoint to Predict
- Endpoint scope: assay
- Measurement type: IC50
- Label type: continuous
- Binary semantics: pchembl
- Assay description: Kinase Assay: A PDK1 kinase assay was performed as follows. PDK1 (amino acids 51-360) and AKT2 (amino acids 140-467 fused to PIFtide, amino acids EEQEMFRDFDYIADW) were expressed as N-terminally tagged GST fusion proteins in insect cells and purified to greater than 90% homogeneity. PDK1 protein was divided into two fractions, one of which was subsequently dephosphorylated. To generate dephosphorylated PDK1, the PDK1 was reacted with GST-tagged lambda-phosphatase in vitro. GST was subsequently cleaved proteolytically for both phosphorylated and dephosphorylated PDK1. Protein preparations were run on glutathione Sepharose columns to remove GST and GST-tagged lambda-phosphatase, if present. Phosphorylated PDK1 and dephosphorylated PDK1 were verified by mass-spectrometry. Enzyme activity was determined in a coupled PDK1/AKT/FAM-crosstide assay using either phosphorylated or unphosphorylated PDK1 and phosphorylation of FAM-crosstide was determined by standard IMAP protocol (Molecular Devices). For inhibition studies, compounds were titrated 3-fold in DMSO and diluted 40-fold into assay buffer (10 mM Tris HCl pH7.2; 10 mM MgCl2; 0.01% Triton X-100; 1 mM DTT) containing PDK1, AKT2, and FAM-crosstide. (final concentrations: 25 nM un-phosphorylated PDK1 or 0.5 nM phosphorylated PDK1, 30 nM unphosphorylated AKT2, and 100 nM crosstide substrate). The kinase reaction was initiated by adding ATP to a final concentration of 24 μM for both forms of PDK1 and incubated at 25° C. for 30 min. To detect assay product, the kinase reaction was combined with Progressive Binding Solution (1:600 Progressive Binding Reagent, 50% Buffer A, 50% Buffer B, Molecular Devices) in a 1:3 ratio. The mixture was incubated for 2 hours at 25° C. and the plate was scanned on an Analyst AD with excitation at 485 nm and emission at 530 nm.
- Target name: 3-phosphoinositide-dependent protein kinase 1
- Target type: SINGLE PROTEIN
- Target organism: Homo sapiens

## Reference Molecule A
- Canonical SMILES: Cc1sc(CNC(=O)c2cccn(Cc3ccc(F)c(F)c3)c2=O)nc1-c1c[nH]c2ncccc12
- Properties:
- ChEMBL ID: CHEMBL5773128
- Molecular weight: 491.52
- Heavy atoms: 35
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 5
- TPSA: 92.67
- LogP: 4.41
- Rotatable bonds: 6
- Ring count: 5
- Aromatic rings: 5
- Formal charge: 0
- Fraction Csp3: 0.12
- QED: 0.37

## Known Reference Result on This Endpoint
- Molecule A clean result: median pChEMBL = 5.28
- This result is provided as context for predicting Molecule B on the same endpoint.

## Reference Molecule A Other ChEMBL Evidence
- type IC50; relation =; value 5250; units nM; pChEMBL 5.28; comment 723665

## Query Molecule B
- Canonical SMILES: O=C(NCCOc1cc(F)c2[nH]c(=O)[nH]c2c1)c1cccn(Cc2ccc(F)c(F)c2)c1=O
- Properties:
- ChEMBL ID: CHEMBL5923108
- Molecular weight: 458.4
- Heavy atoms: 33
- Hydrogen bond donors: 3
- Hydrogen bond acceptors: 4
- TPSA: 108.98
- LogP: 2.29
- Rotatable bonds: 7
- Ring count: 4
- Aromatic rings: 4
- Formal charge: 0
- Fraction Csp3: 0.14
- QED: 0.37

## Molecule Similarity
- Weighted Tanimoto: 0.43

Answer: 5.28