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Updated: Jun 17, 2025

Author Spotlight: Epigenetic Modifications and Metabolic Rewiring as Targets for Cancer Therapy
Published on: October 18, 2024
Transglutaminase 2-mediated histone monoaminylation and its role in cancer
Huapeng Li1,2,3, Jinghua Wu2,3, Nan Zhang2,3
1Molecular, Cellular, and Developmental Biology Graduate Program, The Ohio State University, Columbus, OH 43210, U.S.A.
Abstract:
Transglutaminase 2 (TGM2) has been known as a well-characterized factor regulating the progression of multiple types of cancer, due to its multifunctional activities and the ubiquitous signaling pathways it is involved in. As a member of the transglutaminase family, TGM2 catalyzes protein post-translational modifications (PTMs), including monoaminylation, amide hydrolysis, cross-linking, etc., through the transamidation of variant glutamine-containing protein substrates. Recent discoveries revealed histone as an important category of TGM2 substrates, thus identifying histone monoaminylation as an emerging epigenetic mark, which is highly enriched in cancer cells and possesses significant regulatory functions of gene transcription. In this review, we will summarize recent advances in TGM2-mediated histone monoaminylation as well as its role in cancer and discuss the key research methodologies to better understand this unique epigenetic mark, thereby shedding light on the therapeutic potential of TGM2 as a druggable target in cancer treatment.
Insights
Transglutaminase 2 (TGM2) modifies histones, creating an epigenetic mark enriched in cancer cells. This review explores TGM2-mediated histone monoaminylation and its therapeutic potential in cancer treatment.
Area of Science:
- Biochemistry and Molecular Biology
- Cancer Research
- Epigenetics
Background:
- Transglutaminase 2 (TGM2) is a multifunctional enzyme involved in cancer progression.
- TGM2 catalyzes various protein post-translational modifications (PTMs), including cross-linking and hydrolysis.
- Histones are identified as key substrates of TGM2, leading to histone monoaminylation.
Purpose of the Study:
- To review recent advances in TGM2-mediated histone monoaminylation.
- To elucidate the role of TGM2-mediated histone monoaminylation in cancer.
- To discuss methodologies for studying this epigenetic mark and TGM2's therapeutic potential.
Main Methods:
- Literature review of recent scientific publications.
- Analysis of TGM2's enzymatic activities and substrate interactions.
- Discussion of research methodologies for epigenetic mark investigation.
Main Results:
- Histone monoaminylation by TGM2 is an emerging epigenetic mark.
- This mark is highly enriched in cancer cells.
- Histone monoaminylation significantly regulates gene transcription.
Conclusions:
- TGM2-mediated histone monoaminylation plays a crucial role in cancer.
- Understanding this epigenetic mark offers insights into cancer biology.
- TGM2 represents a potential druggable target for cancer therapy.
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