ChEMBL ligand: CHEMBL3964801
Janus kinase 1/Tyrosine-protein kinase JAK1 in Human [ChEMBL: CHEMBL2835] [GtoPdb: 2047] [UniProtKB: P23458] There should be some charts here, you may need to enable JavaScript!
Janus kinase 2/Tyrosine-protein kinase JAK2 in Human [ChEMBL: CHEMBL2971] [GtoPdb: 2048] [UniProtKB: O60674] There should be some charts here, you may need to enable JavaScript!
Janus kinase 3 in Human [GtoPdb: 2049] [UniProtKB: P52333] There should be some charts here, you may need to enable JavaScript!
tyrosine kinase 2 in Human [GtoPdb: 2269] [UniProtKB: P29597] There should be some charts here, you may need to enable JavaScript!

DB	Assay description	Assay Type	Standard value	Standard parameter	Original value	Original units	Original parameter	Reference
Janus kinase 1/Tyrosine-protein kinase JAK1 in Human (target type: SINGLE PROTEIN) [ChEMBL: CHEMBL2835] [GtoPdb: 2047] [UniProtKB: P23458]
ChEMBL	JAK Enzyme Assay: The activity of the isolated recombinant JAK1 and JAK2 kinase domain was measured by monitoring phosphorylation of a peptide derived from JAK3 (Val-Ala-Leu-Val-Asp-Gly-Tyr-Phe-Arg-Leu-Thr-Thr, fluorescently labeled on the N-terminus with 5-carboxyfluorescein) using the Caliper LabChip® technology (Caliper Life Sciences, Hopkinton, Mass.). To determine inhibition constants (Ki), compounds were diluted serially in DMSO and added to 50 μL kinase reactions containing purified enzyme (1.5 nM JAK1, or 0.2 nM JAK2), 100 mM HEPES buffer (pH 7.2), 0.015% Brij-35, 1.5 μM peptide substrate, ATP (25 μM), 10 mM MgCl2, 4 mM DTT at a final DMSO concentration of 2%. Reactions were incubated at 22° C. in 384-well polypropylene microtiter plates for 30 minutes and then stopped by addition of 25 μL of an EDTA containing solution (100 mM HEPES buffer (pH 7.2), 0.015% Brij-35, 150 mM EDTA), resulting in a final EDTA concentration of 50 mM. After termination of the kinase reaction, the proportion of phosphorylated product was determined as a fraction of total peptide substrate using the Caliper LabChip® 3000 according to the manufacturer's specifications.	B	9.47	pKi	0.34	nM	Ki	US-9346815-B2. 5-chloro-2-difluoromethoxyphenyl pyrazolopyrimidine compounds, compositions and methods of use thereof (2016)
GtoPdb	Biochemical assay determination	-	9.59	pKi	0.26	nM	Ki	Sci Transl Med (2018) 10: eaao2151 [PMID:30463918]
Janus kinase 2/Tyrosine-protein kinase JAK2 in Human (target type: SINGLE PROTEIN) [ChEMBL: CHEMBL2971] [GtoPdb: 2048] [UniProtKB: O60674]
ChEMBL	JAK Enzyme Assay: The activity of the isolated recombinant JAK1 and JAK2 kinase domain was measured by monitoring phosphorylation of a peptide derived from JAK3 (Val-Ala-Leu-Val-Asp-Gly-Tyr-Phe-Arg-Leu-Thr-Thr, fluorescently labeled on the N-terminus with 5-carboxyfluorescein) using the Caliper LabChip® technology (Caliper Life Sciences, Hopkinton, Mass.). To determine inhibition constants (Ki), compounds were diluted serially in DMSO and added to 50 μL kinase reactions containing purified enzyme (1.5 nM JAK1, or 0.2 nM JAK2), 100 mM HEPES buffer (pH 7.2), 0.015% Brij-35, 1.5 μM peptide substrate, ATP (25 μM), 10 mM MgCl2, 4 mM DTT at a final DMSO concentration of 2%. Reactions were incubated at 22° C. in 384-well polypropylene microtiter plates for 30 minutes and then stopped by addition of 25 μL of an EDTA containing solution (100 mM HEPES buffer (pH 7.2), 0.015% Brij-35, 150 mM EDTA), resulting in a final EDTA concentration of 50 mM. After termination of the kinase reaction, the proportion of phosphorylated product was determined as a fraction of total peptide substrate using the Caliper LabChip® 3000 according to the manufacturer's specifications.	B	9.15	pKi	0.7	nM	Ki	US-9346815-B2. 5-chloro-2-difluoromethoxyphenyl pyrazolopyrimidine compounds, compositions and methods of use thereof (2016)
GtoPdb	-	-	9.21	pKi	0.62	nM	Ki	Sci Transl Med (2018) 10: eaao2151 [PMID:30463918]
Janus kinase 3 in Human [GtoPdb: 2049] [UniProtKB: P52333]
GtoPdb	-	-	7.68	pKi	20.8	nM	Ki	Sci Transl Med (2018) 10: eaao2151 [PMID:30463918]
tyrosine kinase 2 in Human [GtoPdb: 2269] [UniProtKB: P29597]
GtoPdb	-	-	8.5	pKi	3.15	nM	Ki	Sci Transl Med (2018) 10: eaao2151 [PMID:30463918]

ChEMBL data shown on this page come from version 34:

Zdrazil B, Felix E, Hunter F, Manners EJ, Blackshaw J, Corbett S, de Veij M, Ioannidis H, Lopez DM, Mosquera JF, Magarinos MP, Bosc N, Arcila R, Kizilören T, Gaulton A, Bento AP, Adasme MF, Monecke P, Landrum GA, Leach AR. (2024). The ChEMBL Database in 2023: a drug discovery platform spanning multiple bioactivity data types and time periods. Nucleic Acids Res., 52(D1). DOI: 10.1093/nar/gkad1004. [EPMCID:10767899] [PMID:37933841]
Davies M, Nowotka M, Papadatos G, Dedman N, Gaulton A, Atkinson F, Bellis L, Overington JP. (2015) 'ChEMBL web services: streamlining access to drug discovery data and utilities.' Nucleic Acids Res., 43(W1). DOI: 10.1093/nar/gkv352. [EPMCID:25883136]