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Updated: May 13, 2026

Analysis of mRNA Nuclear Export Kinetics in Mammalian Cells by Microinjection
11:32

Analysis of mRNA Nuclear Export Kinetics in Mammalian Cells by Microinjection

Published on: December 4, 2010

mRNA export: threading the needle

Ouassila Gaouar1, Hugo Germain

  • 1Groupe de Recherche en Biologie Végétale, Département de Chimie et Physique, Université du Québec à Trois-Rivières Trois-Rivières, QC, Canada.

Frontiers in Plant Science
|March 26, 2013
PubMed

Insights

The plant protein MOS11 (MODIFIER OF SNC1, 11) is crucial for nuclear mRNA export, impacting plant immunity. Its human ortholog, CIP29, also interacts with mRNA export factors, suggesting conserved roles in stress responses.

Area of Science:

  • Plant molecular biology
  • RNA biology
  • Biotic stress response

Background:

  • Messenger RNA (mRNA) biogenesis involves numerous proteins ensuring proper export from the nucleus to the cytoplasm.
  • Proteins involved in mRNA export bind RNA during transcription or later processing steps, facilitating transport to the nuclear pore.
  • The Arabidopsis protein MOS11 (MODIFIER OF SNC1, 11) was found to partially suppress autoimmune responses in the snc1 mutant.

Purpose of the Study:

  • To investigate the role of MOS11 in nuclear mRNA export and its connection to plant immunity.
  • To explore the function of MOS11 and its putative human ortholog CIP29 in mRNA export pathways.
  • To discuss the significance of MOS11, CIP29, and associated proteins (DDX39, TAF15, ALY) in plant biotic stress.

Main Methods:

  • Analysis of Arabidopsis plant knockout mutants (mos11-1 snc1) to assess autoimmune responses and mRNA export.
  • Identification and characterization of protein interactions involving human CIP29 and mRNA export factors (DDX39, TAF15, ALY).
  • Review and discussion of the known and potential roles of these proteins in plants.

Main Results:

  • The mos11-1 snc1 Arabidopsis mutant exhibits suppressed autoimmune responses, linked to a decrease in nuclear mRNA export.
  • The human protein CIP29 (cytokine-induced protein 29 kDa) interacts with known mRNA export proteins: DDX39 (DEAD-box RNA helicase), TAF15 (FUS family), and ALY (ALWAYS EARLY).

Conclusions:

  • MOS11 plays a significant role in nuclear mRNA export in Arabidopsis, influencing the regulation of plant immunity.
  • Conserved interactions between human CIP29 and mRNA export factors suggest a conserved mechanism for mRNA export and potentially stress response across species.
  • Further research into plant orthologs of CIP29, DDX39, TAF15, and ALY is warranted to elucidate their roles in mRNA export and plant biotic stress.
Keywords:
ALYCIP29MOS11RNA helicaseTAF15bTAFsmRNA exportsnc1

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