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Updated: Jun 30, 2025

Characterizing RNA Modifications in Single Neurons Using Mass Spectrometry
Published on: April 21, 2022
Regulation of m6Am RNA modification and its implications in human diseases
Hao Jin1,2, Zhouyuanjing Shi3, Tianhua Zhou2,3,4
1Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China.
Abstract:
N 6,2'-O-dimethyladenosine (m6Am) is a prevalent modification frequently found at the 5' cap-adjacent adenosine of messenger RNAs (mRNAs) and small nuclear RNAs (snRNAs) and the internal adenosine of snRNAs. This dynamic and reversible modification is under the regulation of methyltransferases phosphorylated CTD interacting factor 1 and methyltransferase-like protein 4, along with the demethylase fat mass and obesity-associated protein. m6Am RNA modification plays a crucial role in the regulation of pre-mRNA splicing, mRNA stability, and translation, thereby influencing gene expression. In recent years, there has been growing interest in exploring the functions of m6Am and its relevance to human diseases. In this review, we provide a comprehensive overview of the current knowledge concerning m6Am, with a focus on m6Am-modifying enzymes, sequencing approaches for its detection, and its impacts on pre-mRNA splicing, mRNA stability, and translation regulation. Furthermore, we highlight the roles of m6Am in the context of obesity, viral infections, and cancers, unravelling its underlying regulatory mechanisms.
Insights
N6,2'-O-dimethyladenosine (m6Am) is a key RNA modification regulating gene expression. This review covers m6Am enzymes, detection, and its role in diseases like obesity, viral infections, and cancer.
Area of Science:
- Molecular Biology
- Epigenetics
- RNA Biology
Background:
- N6,2"-O-dimethyladenosine (m6Am) is a prevalent epitranscriptomic modification found on mRNA and snRNA.
- This reversible modification is regulated by specific methyltransferases and demethylases.
- m6Am plays critical roles in gene expression by influencing splicing, mRNA stability, and translation.
Purpose of the Study:
- To provide a comprehensive overview of N6,2 -O-dimethyladenosine (m6Am) research.
- To detail m6Am-modifying enzymes and detection methodologies.
- To explore the functional impacts and disease relevance of m6Am.
Main Methods:
- Literature review of m6Am-related studies.
- Analysis of m6Am-modifying enzymes (methyltransferases and demethylases).
- Examination of sequencing approaches for m6Am detection.
Main Results:
- m6Am influences pre-mRNA splicing, mRNA stability, and translation.
- The modification is implicated in the pathogenesis of obesity, viral infections, and cancers.
- Understanding m6Am regulatory mechanisms is crucial for disease insights.
Conclusions:
- m6Am is a significant epitranscriptomic mark with broad biological functions.
- Further research into m6Am is vital for understanding its role in human health and disease.
- Targeting m6Am pathways may offer therapeutic strategies for diseases like cancer.
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