## Endpoint to Predict
- Endpoint scope: assay
- Measurement type: IC50
- Label type: continuous
- Binary semantics: pchembl
- Assay description: GSKbeta Assay: Types of GSK-3 assay used to test the selectivity/off target potential compounds of the invention with respect to PKC Î±/Î¸ inhibition activity includes the following: Type 1: The GSK-3 specific peptide used in this assay was derived from the phosphorylation site of glycogen synthase and its sequence is: YRRAAVPPSPSLSRHSSPHQ(S)EDEEE (SEQ ID NO: 1). (S) is pre-phosphorylated as is glycogen synthase in vivo and the three consensus sites for GSK-3 specific phosphorylation are underlined. The buffer used to make up the glycogen synthase peptide and [γ-33P] ATP consisted of MOPS 25 mM, EDTA 0.2 mM, magnesium acetate 10 mM, Tween-20 0.01% and mercaptoethanol 7.5 mM at pH 7. The compounds were dissolved in dimethyl sulphoxide (DMSO) to a final concentration of 100 mM. Various concentrations were made up in DMSO and mixed with the substrate (GSK-3 peptide) solution (to a final concentration 20 uM) described in the above section along with rabbit or human GSK-3α and GSK-3β (final concentration 0.5 uM/mL enzyme). The reactions were initiated with the addition of [γ-33P] ATP (500 cpm/pmole) spiked into a mixture of ATP (final concentration of 10 uM). After 30 minutes at room temperature the reaction was terminated by the addition of 10 uL of H3PO4/O.OP/0 Tween-20 (2.5%). A volume (10 uL) of the mixture was spotted onto P-30 phosphocellulose paper (Wallac & Berthold, EG&G Instruments Ltd, Milton Keynes). The paper was washed four times in H3PO4 (0.5%), 2 minutes for each wash, air dried and the radioactive phosphate incorporated into the synthetic glycogen synthase peptide, which binds to the P-30 phosphocellulose paper, was counted in a Wallac microbeta scintillation counter Analysis of Data: Values for IC50 for each inhibitor were calculated by fitting a four-parameter logistic curve to the model: cpm=lower+(upper-lower)/(I+(concentration IC50)).
- Assay organism: Homo sapiens
- Target name: Glycogen synthase kinase-3 beta
- Target type: SINGLE PROTEIN
- Target organism: Homo sapiens

## Reference Molecule A
- Canonical SMILES: Nc1ncc(-c2ncccc2OC(F)(F)F)nc1C(=O)Nc1ncccc1N1CCC(N)(CO)CC1
- Properties:
- ChEMBL ID: CHEMBL3901073
- Molecule type: Small molecule
- Molecular weight: 504.47
- Heavy atoms: 36
- Hydrogen bond donors: 4
- Hydrogen bond acceptors: 10
- TPSA: 165.4
- LogP: 1.96
- Rotatable bonds: 6
- Ring count: 4
- Aromatic rings: 3
- Formal charge: 0
- Fraction Csp3: 0.32
- QED: 0.39

## Known Reference Result on This Endpoint
- Molecule A clean result: median pChEMBL = 5.89
- This result is provided as context for predicting Molecule B on the same endpoint.

## Reference Molecule A Other ChEMBL Evidence
- type IC50; relation =; value 1300; units nM; pChEMBL 5.89; comment 438375

## Query Molecule B
- Canonical SMILES: Nc1ncc(-c2ncccc2OC(F)(F)F)nc1C(=O)Nc1ncccc1N1CCC(N)CC1
- Properties:
- ChEMBL ID: CHEMBL3915489
- Molecule type: Small molecule
- Molecular weight: 474.45
- Heavy atoms: 34
- Hydrogen bond donors: 3
- Hydrogen bond acceptors: 9
- TPSA: 145.17
- LogP: 2.59
- Rotatable bonds: 5
- Ring count: 4
- Aromatic rings: 3
- Formal charge: 0
- Fraction Csp3: 0.29
- QED: 0.51

## Molecule Similarity
- Weighted Tanimoto: 0.76

Answer: 5.62