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Updated: Nov 3, 2025

Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
Published on: August 5, 2022
Biochemical perspectives on targeting KMT2 methyltransferases in cancer
Xiang Zhai1, James E Brownell2
1Mechanistic Biology & Profiling, Discovery Sciences, R&D, AstraZeneca, Waltham, MA 02451, USA.
Abstract:
KMT2 methyltransferases are important regulators of gene transcription through the methylation of histone H3 lysine 4 at promoter and enhancer regions. They reside in large, multisubunit protein complexes, which not only regulate their catalytic activities but also mediate their interactions with chromatin. The KMT2 family was initially associated with cancer due to the discovery of KMT2A translocations in mixed-lineage leukemia (MLL). However, emerging evidences suggest that the methyltransferase activity of KMT2 enzymes can also be important in cancer, raising the prospect of targeting the catalytic domain of KMT2 as a therapeutic strategy. In this review, we summarize recent advances in our understanding of KMT2 enzyme mechanisms and their regulation on nucleosomes, which will provide mechanistic insights into therapeutic discoveries targeting their methyltransferase activities.
Insights
KMT2 methyltransferases regulate gene transcription and are implicated in cancer. Targeting their catalytic activity offers a promising therapeutic strategy for various cancers.
Area of Science:
- Biochemistry
- Molecular Biology
- Cancer Research
Background:
- KMT2 methyltransferases are key regulators of gene transcription via histone methylation.
- These enzymes function within large protein complexes that influence chromatin interactions.
- KMT2 family genes are linked to cancer, notably KMT2A translocations in mixed-lineage leukemia (MLL).
Purpose of the Study:
- To review recent advances in KMT2 enzyme mechanisms.
- To explore KMT2 regulation on nucleosomes.
- To provide insights for targeting KMT2 methyltransferase activity therapeutically.
Main Methods:
- Literature review of KMT2 methyltransferases.
- Analysis of KMT2 enzyme mechanisms and regulation.
- Examination of KMT2's role in cancer and therapeutic targeting.
Main Results:
- KMT2 enzymes regulate gene transcription through histone H3 lysine 4 methylation.
- Protein complexes modulate KMT2 catalytic activity and chromatin binding.
- Emerging evidence highlights the importance of KMT2 methyltransferase activity in cancer.
Conclusions:
- Understanding KMT2 mechanisms and regulation is crucial.
- Targeting the catalytic domain of KMT2 presents a potential cancer therapy.
- This review offers mechanistic insights for developing KMT2-targeted therapies.
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