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Updated: Jul 9, 2025

Specificity Analysis of Protein Lysine Methyltransferases Using SPOT Peptide Arrays
Published on: November 29, 2014
Tumor-suppressive functions of protein lysine methyltransferases
Nur Aziz1, Yo Han Hong1, Han Gyung Kim2
1Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Abstract:
Protein lysine methyltransferases (PKMTs) play crucial roles in histone and nonhistone modifications, and their dysregulation has been linked to the development and progression of cancer. While the majority of studies have focused on the oncogenic functions of PKMTs, extensive evidence has indicated that these enzymes also play roles in tumor suppression by regulating the stability of p53 and β-catenin, promoting α-tubulin-mediated genomic stability, and regulating the transcription of oncogenes and tumor suppressors. Despite their contradictory roles in tumorigenesis, many PKMTs have been identified as potential therapeutic targets for cancer treatment. However, PKMT inhibitors may have unintended negative effects depending on the specific cancer type and target enzyme. Therefore, this review aims to comprehensively summarize the tumor-suppressive effects of PKMTs and to provide new insights into the development of anticancer drugs targeting PKMTs.
Insights
Protein lysine methyltransferases (PKMTs) have dual roles in cancer, acting as both oncogenes and tumor suppressors. This review highlights their tumor-suppressive functions, offering insights for developing targeted cancer therapies.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Protein lysine methyltransferases (PKMTs) are critical enzymes involved in histone and nonhistone modifications.
- Dysregulation of PKMTs is implicated in cancer development and progression.
- While often studied for oncogenic roles, PKMTs also exhibit tumor-suppressive functions.
Purpose of the Study:
- To comprehensively review the tumor-suppressive effects of PKMTs.
- To provide insights for developing novel anticancer drugs targeting PKMTs.
Main Methods:
- Literature review of studies on PKMTs in cancer.
- Analysis of PKMTs' roles in regulating protein stability (p53, β-catenin).
- Examination of PKMTs' involvement in genomic stability and gene transcription.
Main Results:
- PKMTs regulate tumor suppression through mechanisms including p53 and β-catenin stabilization.
- PKMTs contribute to genomic stability via α-tubulin regulation.
- PKMTs modulate the transcription of key oncogenes and tumor suppressors.
Conclusions:
- PKMTs possess significant tumor-suppressive activities.
- Understanding these dual roles is crucial for PKMT-targeted cancer therapy.
- Targeting PKMTs requires careful consideration of specific cancer types and enzymes to avoid adverse effects.
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