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Orientation of Human Microprocessor on Primary MicroRNAs

Huong Minh Nguyen1, Trung Duc Nguyen2, Thuy Linh Nguyen2

  • 1Laboratory of Molecular Microbiology, Institute of Biotechnology , Vietnam Academy of Science and Technology , Hanoi , Vietnam.

Biochemistry
|November 28, 2018
PubMed

Insights

MicroRNA (miRNA) production accuracy depends on how the Microprocessor complex orients on pri-miRNAs. Recent discoveries reveal cis-acting RNA elements and trans-acting factors control this crucial orientation mechanism.

Area of Science:

  • Molecular Biology
  • Gene Regulation

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression, impacting cellular processes and diseases like cancer.
  • miRNA biogenesis involves processing of primary miRNA transcripts (pri-miRNAs) by the Microprocessor complex in the nucleus.

Purpose of the Study:

  • To review and discuss the mechanisms controlling Microprocessor complex orientation on pri-miRNAs.
  • To explore how this orientation impacts miRNA production accuracy and efficiency.
  • To consider potential undiscovered regulatory mechanisms.

Main Methods:

  • Literature review of recent findings on Microprocessor orientation.
  • Analysis of cis-acting RNA elements involved in pri-miRNA processing.
  • Examination of trans-acting factors influencing Microprocessor binding.

Main Results:

  • Microprocessor orientation determines whether pri-miRNA processing yields functional miRNAs or leads to cleavage.
  • Both RNA sequence/structure (cis-acting) and protein factors (trans-acting) are critical for orienting the Microprocessor.
  • Understanding these mechanisms is vital for controlling miRNA levels.

Conclusions:

  • Microprocessor orientation is a fundamental regulatory step in miRNA biogenesis.
  • Recent advances have elucidated key factors governing this process.
  • Further research may uncover novel regulatory pathways for pri-miRNA processing.

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