## Endpoint to Predict
- Endpoint scope: assay
- Measurement type: IC50
- Label type: continuous
- Binary semantics: pchembl
- Assay description: Inhibition of Protease Activity Assay: Full-length cDNA of human MALT1 gene (GenBank accession No: AB026118.1) amplified by PCR was inserted in flame to a SalI site located downstream of GST gene in a pGEX6P3 vector (GE Healthcare Japan Corp.) to prepare a vector (hereinafter, referred to as a pGEX6P3-MALT1 vector). Subsequently, E. coli for protein expression (BL21-RIL-codon plus-DE3, Agilent Technologies, Inc.) was transformed with the pGEX6P3-MALT1 vector and then analyzed by ampicillin resistance screening and colony PCR to obtain an E. coli strain expressing recombinant GST fusion MALT1. Protein expression was induced with isopropyl-(3-thiogalactopyranoside. After the expression induction, E. coli precipitates were recovered by centrifugation from the E. coli culture solution, and the E. coli precipitates were homogenized and then centrifuged to obtain a supernatant. The supernatant was purified using GSTrap FF column (GE Healthcare Japan Corp.) to obtain recombinant GST fusion MALT1.B) Evaluation of Inhibition of Protease Activity of MALT1:To 89 μL of an enzyme solution (4.8 g/mL GST fusion MALT1, 50 mmol/L MES, 150 mmol/L NaCl, 10% sucrose, 0.1% CHAPS, 10 mmol/L dithiothreitol, and 1 mol/L tri-ammonium citrate) per specimen, 1 μL of a test compound (DMSO-diluted solution) of each concentration was added to prepare a mixed solution. The mixed solution was incubated at room temperature for 30 minutes, followed by the measurement of the fluorescence value of the mixed solution (fluorescence value of the first measurement) (Ex: 380 nm, Em: 460 nm; Envision (Perkin Elmer Inc.)). Next, 10 μL of 200 μmol/L substrate (Ac-LRSR-AMC, SM Biochemicals LLC) was added (final concentration: 20 μmol/L) to the mixed solution, and the mixture was reacted by incubation at 30° C. for 80 minutes, followed by the measurement of the fluorescence value of the reaction solution (fluorescence value of the second measurement) (Ex: 380 nm, Em: 460 nm; Envision (Perkin Elmer Inc.)).
- Assay organism: Homo sapiens
- Target name: Mucosa-associated lymphoid tissue lymphoma translocation protein 1
- Target type: SINGLE PROTEIN
- Target organism: Homo sapiens

## Reference Molecule A
- Canonical SMILES: N/C(=N\S(=O)(=O)c1ccccc1)NCc1cnc(-c2cccc(Cl)c2)c(-c2ccc(Cl)cc2)c1
- Properties:
- ChEMBL ID: CHEMBL6025543
- Molecular weight: 511.43
- Heavy atoms: 34
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 3
- TPSA: 97.44
- LogP: 5.52
- Rotatable bonds: 6
- Ring count: 4
- Aromatic rings: 4
- Formal charge: 0
- Fraction Csp3: 0.04
- QED: 0.26

## Known Reference Result on This Endpoint
- Molecule A clean result: median pChEMBL = 5.85
- This result is provided as context for predicting Molecule B on the same endpoint.

## Reference Molecule A Other ChEMBL Evidence
- type IC50; relation =; value 1400; units nM; pChEMBL 5.85; comment 906372

## Query Molecule B
- Canonical SMILES: COCC(=O)/N=C(\N)NCc1cnc(-c2ccc(Cl)cc2)c(-c2ccc(Cl)cc2)c1
- Properties:
- ChEMBL ID: CHEMBL6015367
- Molecular weight: 443.33
- Heavy atoms: 30
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 3
- TPSA: 89.6
- LogP: 4.3
- Rotatable bonds: 6
- Ring count: 3
- Aromatic rings: 3
- Formal charge: 0
- Fraction Csp3: 0.14
- QED: 0.44

## Molecule Similarity
- Weighted Tanimoto: 0.56

Answer: 6.19