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Updated: Jun 26, 2026

In vitro Methylation Assay to Study Protein Arginine Methylation
Published on: October 5, 2014
Minireview: protein arginine methylation of nonhistone proteins in transcriptional regulation
Young-Ho Lee1, Michael R Stallcup
1Department of Biochemistry and Molecular Biology, Norris Comprehensive Cancer Center, Los Angeles, California 90089-9176, USA.
Abstract:
Endocrine regulation frequently culminates in altered transcription of specific genes. The signal transduction pathways, which transmit the endocrine signal from cell surface to the transcription machinery, often involve posttranslational modifications of proteins. Although phosphorylation has been by far the most widely studied protein modification, recent studies have indicated important roles for other types of modification, including protein arginine methylation. Ten different protein arginine methyltransferase (PRMT) family members have been identified in mammalian cells, and numerous substrates are being identified for these PRMTs. Whereas major attention has been focused on the methylation of histones and its role in chromatin remodeling and transcriptional regulation, there are many nonhistone substrates methylated by PRMTs. This review primarily focuses on recent progress on the roles of the nonhistone protein methylation in transcription. Protein methylation of coactivators, transcription factors, and signal transducers, among other proteins, plays important roles in transcriptional regulation. Protein methylation may affect protein-protein interaction, protein-DNA or protein-RNA interaction, protein stability, subcellular localization, or enzymatic activity. Thus, protein arginine methylation is critical for regulation of transcription and potentially for various physiological/pathological processes.
Insights
Protein arginine methylation, a key posttranslational modification, regulates gene transcription by affecting nonhistone proteins. This process is vital for cellular signaling and various physiological functions.
Area of Science:
- Molecular Biology
- Epigenetics
- Biochemistry
Background:
- Endocrine regulation involves gene transcription, often mediated by signal transduction pathways using protein posttranslational modifications.
- While phosphorylation is well-studied, protein arginine methylation is emerging as a critical regulatory mechanism.
- Protein arginine methyltransferases (PRMTs) modify numerous substrates, including histones and nonhistone proteins.
Purpose of the Study:
- To review recent advancements in understanding the role of nonhistone protein methylation in transcriptional regulation.
- To highlight the diverse functions of protein arginine methylation beyond histone modification.
Main Methods:
- Literature review focusing on recent research in protein arginine methylation and transcription.
- Analysis of studies investigating PRMTs and their nonhistone substrates.
Main Results:
- Protein arginine methylation impacts nonhistone proteins like coactivators, transcription factors, and signal transducers.
- Methylation influences protein interactions, DNA/RNA binding, stability, localization, and enzymatic activity.
- PRMTs play a significant role in modulating gene transcription through nonhistone substrates.
Conclusions:
- Protein arginine methylation is a critical regulator of transcription.
- This modification is essential for various physiological and pathological processes.
- Further research into nonhistone protein methylation will uncover new therapeutic targets.
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