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Enhanced or reversible RNA N6-methyladenosine editing by red/far-red light induction.

Heng Tang1, Shaoqin Han2, Yang Jie3,4

  • 1Department of Otorhinolaryngology-Head and Neck Surgery, Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430072, China.

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Researchers developed a light-controlled system for precise RNA N6-methyladenosine (m6A) editing. This optogenetic tool allows dynamic and reversible control over m6A levels, impacting gene expression and cell differentiation.

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Area of Science:

  • Molecular Biology
  • Optogenetics
  • RNA Epigenetics

Background:

  • N6-methyladenosine (m6A) is a crucial RNA modification regulating biological processes.
  • Achieving precise and dynamic control over m6A levels is a significant challenge in RNA biology.

Purpose of the Study:

  • To develop a red/far-red light-inducible system for efficient and reversible m6A editing.
  • To enable targeted modulation of m6A deposition and removal on specific RNA transcripts.

Main Methods:

  • Engineered CRISPR dCas13 and sgRNA with light-inducible heterodimerizing proteins (ΔphyA/FHY1 and Bphp1/PspR2).
  • Utilized optogenetics for targeted recruitment of m6A effectors.
  • Demonstrated cyclic modulation of m6A at a single target site.

Main Results:

  • Achieved efficient and reversible modulation of m6A levels with minimal off-target effects.
  • Successfully regulated m6A deposition and removal on target transcripts (e.g., SOX2, ACTB).
  • Showcased influence on mRNA expression and human embryonic stem cell differentiation.

Conclusions:

  • The developed optogenetic platform provides precise and versatile control over m6A.
  • This system has broad implications for RNA biology research and potential therapeutic applications.