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In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
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Updated: Aug 9, 2025

Discrimintion and Mapping of the Primary and Processed Transcripts in Maize Mitochondrion Using a Circular RT-PCR-based Strategy
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Plant organellar RNA maturation.

Ian Small1, Joanna Melonek1, Alexandra-Viola Bohne2

  • 1Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular Sciences, The University of Western Australia, Crawley 6009, Australia.

The Plant Cell
|February 22, 2023
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Summary

Plant organellar RNA metabolism relies on nucleus-encoded RNA-binding proteins (RBPs) to regulate RNA. This review explores the mechanisms and kinetics of RBPs in chloroplast and mitochondrial RNA processing for plant survival.

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Plant organellar RNA metabolism is crucial for photosynthesis and respiration.
  • Nucleus-encoded RNA-binding proteins (RBPs) are essential regulators of RNA stability, processing, and degradation in chloroplasts and mitochondria.
  • These post-transcriptional processes are vital for organellar biogenesis and overall plant survival.

Approach:

  • This review adopts an RNA-binding protein (RBP)-centric approach.
  • It focuses on the mechanistic details of how RBPs function in organellar RNA metabolism.
  • The review also examines the kinetics of RNA-related processes influenced by RBPs.

Key Points:

  • Numerous nucleus-encoded RBPs control RNA metabolism in plant organelles.
  • Specific RBPs are often assigned to individual RNA maturation steps for select transcripts.
  • Understanding the mechanistic functions and kinetics of these RBPs is an active area of research.

Conclusions:

  • A comprehensive understanding of organellar RNA metabolism requires detailed knowledge of RBP functions and their kinetics.
  • Further research into the mechanisms of RBPs is needed to fully elucidate plant organellar RNA processing.
  • This review consolidates current knowledge on RBPs in plant organellar RNA metabolism, highlighting mechanistic insights.