Long noncoding RNA-dependent methylation of nonhistone proteins

Area of Science:

• Molecular Biology
• Epigenetics
• RNA Biology

Background:

• Long noncoding RNAs (lncRNAs) are transcripts >200 nucleotides with no coding potential.
• Emerging evidence suggests lncRNAs regulate posttranslational modifications of nonhistone proteins.
• The scope of lncRNA-dependent nonhistone protein methylation remains largely uncharacterized.

Purpose of the Study:

• To systematically review and evaluate the impact of lncRNA-dependent methylation of nonhistone proteins.
• To elucidate the mechanisms by which lncRNAs mediate these modifications.
• To explore the biological relevance of these regulatory networks.

Main Methods:

• Systematic literature review.
• Analysis of lncRNA functions as scaffolds for methyltransferases.
• Evaluation of lncRNA roles in regulating methyltransferase activity and target protein modification.

Main Results:

• lncRNAs function as scaffolds, bringing methyltransferases (MTases) and their nonhistone protein targets together.
• Specific MTases like EZH2, PRMT1/4/5, and SMYD2 are modulated by lncRNAs.
• lncRNAs influence nonhistone protein stability and compartmentalization, affecting cell signaling, gene expression, and RNA processing.
• lncRNAs can also indirectly regulate MTase levels through transcriptional or posttranscriptional control.

Conclusions:

• lncRNA-mediated methylation of nonhistone proteins is a significant regulatory mechanism.
• These regulatory networks involving lncRNAs, MTases, and nonhistone proteins are critically implicated in carcinogenesis and neurological disorders.
• Further research into lncRNA-MTase-protein interactions is warranted to understand their roles in disease.