Human JMJD2B, also known as JHDM3B and KDM4B (GenBank Accession No. NM_015015), amino acids 2-500 with N-terminal GST-tag, MW=83 kDa, expressed in Sf9 cells using a Baculovirus expression system.
Spezifität
0.32 pmole/min/μg Assay conditions: 10μl reaction mix containing assay buffer with 20 mM HEPES (pH 7.4), 50 mM NaCl, 1mM TCEP, 500 μM a-ketoglutarate, 25 μM iron, 2mM ascorbic acid, 0.01% Tween20, 0.5 μM biotinylated peptide substrate, and JMJD2B (2 – 10ng) added to the wells. Add antibody against di-methylated K9 peptide. Incubate for 30 min, then Streptavidin conjugated secondary antibody followed by Alpha Screening detection.
Anwendung
Useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling.
Physikalische Form
Formulated in: 40 mM Tris-HCl, pH 8.0, 110 mM NaCl, 2.2 mM KCl, 3 mM DTT, 20% Glycerol.
Lagerung und Haltbarkeit
At least 6 months at –80°C. Avoid freeze/thaw cycles. Storing diluted enzyme is not recommended, if necessary, use carrier protein (BSA 0.1 – 0.5%).
Histone lysine trimethyl states represent some of the most robust epigenetic modifications in eukaryotic chromatin. Using a candidate approach, we identified the subgroup of murine Jmjd2 proteins to antagonize H3K9me3 at pericentric heterochromatin. H3K27me3 and H4K20me3 marks are not impaired
The Journal of biological chemistry, 283(52), 36542-36552 (2008-11-06)
Posttranslational histone modifications serve to store epigenetic information and control both nucleosome assembly and recruitment of non-histone proteins. Histone methylation occurs on arginine and lysine residues and is involved in the regulation of gene transcription. A dynamic control of these
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