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Unwinding BRAHMA Functions in Plants.

Caroline Thouly1, Marie Le Masson1, Xuelei Lai1

  • 1Université Grenoble Alpes, unité de formation et de recherche de Chimie et Biologie, Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAe), Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de recherche interdisciplinaire de Grenoble (IRIG), Laboratoire de Physiologie Cellulaire et Végétale, 38000 Grenoble, France.

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Summary

The BRAHMA (BRM) protein in plants plays a key role in gene transcription and development. BRM also has a newly discovered function in microRNA processing, independent of its chromatin remodeling role.

Keywords:
BRAHMASWI2/SNF2chromatinmiRNAsremodelingtranscription factor

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Area of Science:

  • Plant molecular biology
  • Chromatin remodeling
  • Gene regulation

Background:

  • The Switch/Sucrose non-fermenting (SWI/SNF) complex is crucial for gene transcription by altering DNA-histone interactions.
  • BRAHMA (BRM) is the plant homolog of yeast/animal SWI2/SNF2 ATPases and a catalytic subunit of the SWI/SNF complex.
  • BRM's functions extend beyond chromatin remodeling, including roles in development and microRNA processing.

Purpose of the Study:

  • To summarize recent advances on the roles of BRM in plant biology.
  • To highlight BRM's chromatin-independent function in pri-miRNA processing.
  • To elucidate the roles of plant-specific BRM-interacting partners.

Main Methods:

  • Literature review and synthesis of existing research on BRM.
  • Analysis of studies reporting BRM's involvement in plant development.
  • Examination of in vitro and in vivo studies on BRM's role in pri-miRNA processing.

Main Results:

  • BRM is essential for various aspects of plant development.
  • BRM participates in chromatin-independent processing of primary microRNAs (pri-miRNAs).
  • BRM interacts with diverse partners including DNA-binding proteins, enzymes, and RNA-binding proteins.

Conclusions:

  • BRM occupies a central position in plant regulatory networks.
  • BRM integrates chromatin-dependent and -independent pathways.
  • Understanding BRM and its partners is key to deciphering fundamental plant biological processes.