DNA methyltransferase (DNMT) assay kits provide a reliable, non-radioactive method for measuring DNMT activity by monitoring the transfer of methyl groups from S-adenosylmethionine (SAM) to DNA substrates. These assays are widely used for epigenetic research, enzyme characterization, inhibitor screening, recombinant protein quality control, and the analysis of DNMT activity in purified proteins or nuclear extracts.

Assay Formats

Modern DNMT assays employ ELISA-based detection using anti-5-methylcytosine antibodies, coupled enzymatic SAH detection, or highly quantitative LC-MS/HPLC approaches. Colorimetric, fluorometric, chemiluminescent, and bioluminescent readouts provide sensitive, scalable alternatives to traditional radiometric assays.

Applications

• Epigenetic Research: Quantification of total or isoform-specific DNMT activity.
• Drug Discovery: High-throughput screening of DNMT inhibitors and kinetic characterization.
• Quality Control: Validation of recombinant DNMT enzymes and comparison of cellular DNMT activity under different experimental conditions.