Recessive mutations in muscle-specific isoforms of FXR1 cause congenital multi-minicore myopathy

María Cristina Estañ, Elisa Fernández-Núñez, Maha S. Zaki, María Isabel Esteban, Sandra Donkervoort, Cynthia Hawkins, José A. Caparros-Martin, Dimah Saade, Ying Hu, Véronique Bolduc, Katherine Ru Yui Chao, Julián Nevado, Ana Lamuedra, Raquel Largo, Gabriel Herrero-Beaumont, Javier Regadera, Concepción Hernandez-Chico, Eduardo F. Tizzano, Victor Martinez-Glez, Jaime J. CarvajalRuiting Zong, David L. Nelson, Ghada A. Otaify, Samia Temtamy, Mona Aglan, Mahmoud Issa, Carsten G. Bönnemann, Pablo Lapunzina, Grace Yoon, Victor L. Ruiz-Perez*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


FXR1 is an alternatively spliced gene that encodes RNA binding proteins (FXR1P) involved in muscle development. In contrast to other tissues, cardiac and skeletal muscle express two FXR1P isoforms that incorporate an additional exon-15. We report that recessive mutations in this particular exon of FXR1 cause congenital multi-minicore myopathy in humans and mice. Additionally, we show that while Myf5-dependent depletion of all FXR1P isoforms is neonatal lethal, mice carrying mutations in exon-15 display non-lethal myopathies which vary in severity depending on the specific effect of each mutation on the protein.

Original languageEnglish
Article number797
JournalNature Communications
Issue number1
Publication statusPublished - Dec 1 2019
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)

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