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Structural Insights into N6-methyladenosine (m6A) Modification in the Transcriptome.

Jinbo Huang1, Ping Yin1

  • 1National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China.

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Summary

N6-methyladenosine (m6A) is a key RNA modification impacting gene expression. This review details the proteins regulating m6A and its role in cellular processes.

Keywords:
EpitranscriptomicsEraserM(6)A modificationReaderWriter

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Area of Science:

  • Molecular Biology
  • Epigenetics
  • RNA Biology

Background:

  • Over 100 RNA modifications exist, with N6-methyladenosine (m6A) being the most abundant in mRNA and non-coding RNA.
  • m6A influences mRNA metabolism, including splicing, translation, and stability, and microRNA maturation.
  • m6A plays crucial roles in various cellular processes.

Purpose of the Study:

  • To review the structures of proteins that regulate m6A modification.
  • To provide insights into m6A-mediated gene regulation.

Main Methods:

  • Literature review focusing on m6A regulatory proteins (writers, erasers, readers).
  • Analysis of protein structures involved in m6A modulation.
  • Synthesis of current understanding of m6A-mediated gene regulation.

Main Results:

  • m6A modification is dynamically regulated by writer (methyltransferase), eraser (demethylating enzyme), and reader (m6A-binding protein) complexes.
  • Reader proteins, notably YTH family members, selectively bind m6A RNA and influence its fate.
  • Structural insights into these regulatory proteins are crucial for understanding m6A function.

Conclusions:

  • m6A is a fundamental epitranscriptomic mark with broad regulatory roles.
  • Understanding the structures and functions of m6A regulatory proteins is key to deciphering m6A-mediated gene expression control.
  • This review consolidates knowledge on m6A machinery, highlighting its significance in cellular regulation.