Human JARID1B, also known as PLU-1 and KDM5B (GenBank Accession No. NM_006618), a.a. 2-751 with N-terminal His-FLAG-tag, MW=88 kDa, expressed in Sf9 cells via a baculovirus expression system.
Host cell line: Sf9 cells
Specific activity: 0.22 pmole/min/ug
Background
Histone demethylase that demethylates Lys-4 of histone H3, thereby playing a central role in histone code. Does not demethylate histone H3 Lys-9 or H3 Lys-27. Demethylates trimethylated, dimethylated and monomethylated H3 Lys-4. Acts as a transcriptional corepressor for FOXG1B and PAX9. Favors the proliferation of breast cancer cells by repressing tumor suppressor genes such as BRCA1 and HOXA5. In contrast, may act as a tumor suppressor for melanoma.
Immunogen Region
2-751
Tag
N-terminal His-FLAG-tags
Formulation
40 mM Tris-HCl, pH 8.0, 110 mM NaCl, 2.2 mM KCl, 0.04% Tween-20, 80 ug/mL FLAG peptide and 20% glycerol.
Species
Human
Application
Useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling
Notes
10 ul reaction mix containing assay buffer with 20 mM HEPES (pH 7.4), 50 mM NaCl 500 uM alpha-ketoglutarate, 25 uM iron, 2mM ascorbic acid, 0.01% Tween-20, 0.5 uM biotinylated peptide substrate, and JARID1B (20 - 100 ng) added to the wells. Add antibody against demethylated K4 peptide. Incubate for 30 min, then Streptavidin-conjugated secondary antibody followed by Alpha Screening detection.