ChEMBL ligand: CHEMBL38434 (Brequinar)
dihydrofolate reductase/Dihydrofolate reductase in Human [ChEMBL: CHEMBL202] [GtoPdb: 2603] [UniProtKB: P00374] There should be some charts here, you may need to enable JavaScript!
Dihydroorotate dehydrogenase (quinone), mitochondrial in Schistosoma mansoni [ChEMBL: CHEMBL4523950] [UniProtKB: G4VFD7] dihydroorotate dehydrogenase (quinone)/Dihydroorotate dehydrogenase (quinone), mitochondrial in Human [ChEMBL: CHEMBL1966] [GtoPdb: 2604] [UniProtKB: Q02127] dihydroorotate dehydrogenase (quinone)/Dihydroorotate dehydrogenase (quinone), mitochondrial in Rat [ChEMBL: CHEMBL2383] [GtoPdb: 2604] [UniProtKB: Q63707] There should be some charts here, you may need to enable JavaScript!
RNA demethylase ALKBH5 in Human [ChEMBL: CHEMBL3621037] [UniProtKB: Q6P6C2] 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
dihydrofolate reductase/Dihydrofolate reductase in Human (target type: SINGLE PROTEIN) [ChEMBL: CHEMBL202] [GtoPdb: 2603] [UniProtKB: P00374]
ChEMBL	Inhibition of recombinant human N-terminal truncated GST-tagged DHFR (31 to 395 residues) expressed in Escherichia coli BL21(DE3) pyrD using DHO as substrate preincubated for 5 mins followed by substrate addition measured for 5 mins by DCIP oxidation based CoQ10 enzyme coupled assay	B	8.74	pIC50	1.8	nM	IC50	Eur J Med Chem (2017) 129: 287-302 [PMID:28235702]
Dihydroorotate dehydrogenase (quinone), mitochondrial in Schistosoma mansoni (target type: SINGLE PROTEIN) [ChEMBL: CHEMBL4523950] [UniProtKB: G4VFD7]
ChEMBL	Inhibition of Schistosoma mansoni DHODH using DHO as substrate measured at 4 secs interval for 60 secs by DCIP reduction based indirect assay	B	4.7	pIC50	20000	nM	IC50	Eur J Med Chem (2019) 167: 357-366 [PMID:30776695]
ChEMBL	Inhibition of Schistosoma mansoni DHODH	B	4.7	pIC50	20000	nM	IC50	Eur J Med Chem (2019) 183: 111681-111681 [PMID:31557612]
dihydroorotate dehydrogenase (quinone)/Dihydroorotate dehydrogenase (quinone), mitochondrial in Human (target type: SINGLE PROTEIN) [ChEMBL: CHEMBL1966] [GtoPdb: 2604] [UniProtKB: Q02127]
GtoPdb	-	-	7	pKi	100	nM	Ki	Invest New Drugs (1987) 5: 235-44 [PMID:2822596]
ChEMBL	Inhibition measurement of orotate formation from radiolabeled dihydroorotate, using partially purified DHODase isolated from human liver.	B	7.92	pKi	12	nM	Ki	Bioorg Med Chem Lett (1995) 5: 1549-1554
ChEMBL	Inhibition of His-tagged human DHODH assessed as reduction of DCIP by spectrophotometry	B	7.4	pIC50	39.81	nM	IC50	J Med Chem (2015) 58: 860-877 [PMID:25558988]
ChEMBL	Inhibition of human DHODH	B	7.43	pIC50	37	nM	IC50	Eur J Med Chem (2019) 183: 111681-111681 [PMID:31557612]
ChEMBL	Inhibition of human recombinant full length C-terminal MYC/DDk-tagged DHODH using decylubiquinone as substrate measured for 1 hr by DCIP absorbance assay	B	7.7	pIC50	20	nM	IC50	J Med Chem (2021) 64: 4762-4786 [PMID:33835811]
ChEMBL	Inhibition of recombinant N-terminal His-tagged human DHODH (31 to 395 residues) expressed in Escherichia coli using L-DHO as substrate measured every 10 mins for 90 mins in presence of decylubiquinone by DCIP based colorimetric assay	B	7.92	pIC50	12	nM	IC50	Bioorg Med Chem (2020) 28: 115739-115739 [PMID:33007554]
ChEMBL	Inhibition of DHODH (unknown origin) using L-DHO, DUQ, DCIP as substrate preincubated for 30 mins followed by substrate addition measured after 20 mins by multilabel plate reader analysis	B	7.92	pIC50	12	nM	IC50	Bioorg Med Chem (2015) 23: 4669-4680 [PMID:26088338]
ChEMBL	Inhibition of human DHODH	B	7.92	pIC50	12	nM	IC50	ACS Med Chem Lett (2013) 4: 517-521 [PMID:23930152]
ChEMBL	Inhibition of human recombinant DHODH	B	8	pIC50	10	nM	IC50	J Med Chem (2015) 58: 5579-5598 [PMID:26079043]
ChEMBL	Inhibition of human recombinant DHODH by Surface plasmon resonance based analysis	B	8	pIC50	10	nM	IC50	Eur J Med Chem (2024) 271: 116442-116442 [PMID:38685143]
ChEMBL	Inhibition of human purified recombinant DHODH	B	8	pIC50	10	nM	IC50	J Med Chem (2013) 56: 3148-3167 [PMID:23452331]
ChEMBL	Inhibition of human recombinant DHODH expressed in baculovirus infected insect cells using dihydroorotate as substrate in presence of quinone by dichlorophenol-indophenol dye based assay	B	8	pIC50	10	nM	IC50	ACS Med Chem Lett (2016) 7: 1112-1117 [PMID:27994748]
ChEMBL	Method for Testing Activities of Compounds at Enzyme Level: Principles of activity test at enzyme level: firstly, dihydroorotate (DHO) is oxidatively dehydrogenated by DHODH to form orotic acid (Orotate, OA), accompanied by reduction of Flavin mononucleotide (FMN) into reduced flavin mononucleotide (FMNH2) by accepting 2H+ and 2e−, then coenzyme Q (CoQ) as hydrogen acceptor accepting electron and proton from FMNH2 is reduced into reduced coenzyme Q (CoQH2), reduced coenzyme Q transfers electrons to a chromogenic substrate, diclofenac sodium salt (DCIP), and finally DCIP was reduced. DCIP shows maximum absorption at 600 nm, while the reduced DCIP does not show absorption at 600 nm. The degree to which the substrate DHO is oxidized can be judged based on the degree of decrease in absorbance. The degree of oxidation of the substrate DHO per unit time is the initial rate of the enzymatic reaction. Upon addition of a inhibitor, the initial rate of the enzymatic reaction is reduced.The purified DHODH was diluted to 10 nM with a test buffer (50 mM HEPES, pH 8.0, 150 mM KCl, 0.1% Triton X-100), and coenzyme Q and DCIP were added to a final concentration of 100 μM and 120 μM, respectively, mixed well, added into a 96-well plate and incubated for 5 min at room temperature. Substrate DHO was added to start the reaction with a DHO final concentration of 500 μM. The absorbance was read at 600 nm using a BioTek microplate reader and read every 30 s for 6 min. For inhibitor activity test, different concentrations of inhibitors were added into the above reaction system, the initial rate of enzymatic reaction when no inhibitor was added was V0, and the initial rate of enzymatic reaction after an inhibitor was added was Vi, and the inhibition rate of a compound was calculated by the formula (1−Vi/V0)×100%. For calculating IC50 of a compound, Origin 8.0 was used to test the inhibition rate at least 8 concentrations. In the experimental procedure, Brequinar (purchased from Sigma-Aldrich Reagent) was used as a positive control and at least three parallels were set in each experiment.	B	8.07	pIC50	8.45	nM	IC50	US-10919869-B2. Thiazole derivative and applications (2021)
ChEMBL	Inhibition of human DHODH using dihydroorotate substrate by DCIP assay	B	8.08	pIC50	8.4	nM	IC50	Medchemcomm (2017) 8: 1297-1302 [PMID:30108840]
ChEMBL	Inhibitory activity against recombinant human DHODH	B	8.1	pIC50	8	nM	IC50	Bioorg Med Chem Lett (2006) 16: 267-270 [PMID:16246558]
ChEMBL	Inhibition of N-terminally truncated human DHODH (Met30 to Arg396 residues) expressed in Escherichia coli BL21 (DE3) using dihydroorotate as substrate preincubated for 5 mins followed by substrate addition measured every 30 secs for 6 mins by DCIP-based spectrophotometric assay	B	8.13	pIC50	7.4	nM	IC50	Medchemcomm (2016) 7: 853-858
ChEMBL	Inhibition of DHODH (unknown origin) expressed in Escherichia coli Rosetta2(DE3) assessed as reduction of DCIP using dihydroorotate as substrate preincubated for 30 mins followed by substrate addition in presence of CoQ10 measured after 1 hr	B	8.14	pIC50	7.3	nM	IC50	J Med Chem (2018) 61: 5162-5186 [PMID:29727569]
ChEMBL	Inhibition of human DHODH	B	8.22	pIC50	6	nM	IC50	J Med Chem (2013) 56: 3148-3167 [PMID:23452331]
ChEMBL	Inhibition of human DHODH using dihydroorotate as substrate and CoQ10 as co-substrate preincubated for 30 mins followed by substrate addition by DCIP coupled microplate reader assay	B	8.28	pIC50	5.2	nM	IC50	J Med Chem (2020) 63: 7633-7652 [PMID:32496056]
ChEMBL	Inhibition of recombinant N-terminal His-tagged human DHODH (31 to 395 residues) expressed in Escherichia coli using DL-dihydroorotic acid as substrate and Q0 as coenzyme by DCIP based assay	B	8.3	pIC50	5	nM	IC50	J Med Chem (2021) 64: 13918-13932 [PMID:34516133]
ChEMBL	Inhibition of human recombinant DHODH	B	8.4	pIC50	4	nM	IC50	ACS Med Chem Lett (2016) 7: 1112-1117 [PMID:27994748]
ChEMBL	Inhibition of recombinant human DHODH by using blue indicator dye DCIP	B	8.52	pIC50	3	nM	IC50	Bioorg Med Chem Lett (2010) 20: 1981-1984 [PMID:20153645]
ChEMBL	Inhibition of human recombinant N-terminal GST-tagged DHODH expressed in Escherichia coli BL21(DE3) using dihydroorotate substrate preincubated for 5 mins followed by substrate addition by DCIP assay	B	8.74	pIC50	1.8	nM	IC50	J Med Chem (2021) 64: 5404-5428 [PMID:33844533]
ChEMBL	Inhibition of recombinant human N-terminal GST-fusion tagged DHODH expressed in Escherichia coli BL21 (DE3) using dihydroorotate as substrate at 50 uM preincubated for 5 mins followed by substrate addition measured after 5 mins by DCIP assay	B	8.74	pIC50	1.8	nM	IC50	J Med Chem (2022) 65: 12701-12724 [PMID:36162075]
ChEMBL	Inhibition of recombinant N-terminal GST-tagged human DHODH (31 to 395 residues) expressed in Escherichia coli BL21(DE3) assessed as inhibition of DCIP reduction using dihydroorotate as substrate preincubated for 5 mins followed by substrate addition measured after 5 mins	B	8.74	pIC50	1.8	nM	IC50	J Med Chem (2018) 61: 6034-6055 [PMID:29939742]
ChEMBL	Inhibition of human DHODH	B	9.32	pIC50	0.48	nM	IC50	Bioorg Med Chem Lett (2020) 30: 127589-127589 [PMID:33007394]
dihydroorotate dehydrogenase (quinone)/Dihydroorotate dehydrogenase (quinone), mitochondrial in Rat (target type: SINGLE PROTEIN) [ChEMBL: CHEMBL2383] [GtoPdb: 2604] [UniProtKB: Q63707]
ChEMBL	Inhibition of rat purified recombinant DHODH	B	6.44	pIC50	367	nM	IC50	J Med Chem (2013) 56: 3148-3167 [PMID:23452331]
ChEMBL	Inhibition of rat recombinant His-tagged truncated DHODH expressed in Escherichia coli using dihydroorotate as substrate by chromogen reduction assay	B	6.9	pIC50	127	nM	IC50	J Med Chem (2013) 56: 3148-3167 [PMID:23452331]
ChEMBL	Inhibition of dihydroorotate dehydrogenase in Wistar rat liver mitochondrial/microsomal membranes measured for 5 mins by 2,6-dichlorophenolindophenol reduction-based spectrophotometry	B	7.48	pIC50	33	nM	IC50	Eur J Med Chem (2012) 49: 102-109 [PMID:22245049]
RNA demethylase ALKBH5 in Human (target type: SINGLE PROTEIN) [ChEMBL: CHEMBL3621037] [UniProtKB: Q6P6C2]
ChEMBL	Inhibition of ALKBH5 (66 to 292 residues)(unknown origin) expressed in Escherichia coli BL21(DE3) using 5'-ATTGTCA(m6A)CAGCAGA-FAM-3' as substrate incubated for 30 mins by FP based assay	B	6.15	pIC50	710	nM	IC50	Eur J Med Chem (2024) 274: 116526-116526 [PMID:38805939]

ChEMBL data shown on this page come from version 36:

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]