Somatic genetic rescue of a germline ribosome assembly defect

Shengjiang Tan, Laëtitia Kermasson, Christine Hilcenko, Vasileios Kargas, David Traynor, Ahmed Z. Boukerrou, Norberto Escudero-Urquijo, Alexandre Faille, Alexis Bertrand, Maxim Rossmann, Beatriz Goyenechea, Li Jin, Jonathan Moreil, Olivier Alibeu, Blandine Beaupain, Christine Bôle-Feysot, Stefano Fumagalli, Sophie Kaltenbach, Jean Alain Martignoles, Cécile MassonPatrick Nitschké, Mélanie Parisot, Aurore Pouliet, Isabelle Radford-Weiss, Frédéric Tores, Jean Pierre de Villartay, Mohammed Zarhrate, Ai Ling Koh, Kong Boo Phua, Bruno Reversade, Peter J. Bond, Christine Bellanné-Chantelot, Isabelle Callebaut, François Delhommeau, Jean Donadieu, Alan J. Warren, Patrick Revy

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Indirect somatic genetic rescue (SGR) of a germline mutation is thought to be rare in inherited Mendelian disorders. Here, we establish that acquired mutations in the EIF6 gene are a frequent mechanism of SGR in Shwachman-Diamond syndrome (SDS), a leukemia predisposition disorder caused by a germline defect in ribosome assembly. Biallelic mutations in the SBDS or EFL1 genes in SDS impair release of the anti-association factor eIF6 from the 60S ribosomal subunit, a key step in the translational activation of ribosomes. Here, we identify diverse mosaic somatic genetic events (point mutations, interstitial deletion, reciprocal chromosomal translocation) in SDS hematopoietic cells that reduce eIF6 expression or disrupt its interaction with the 60S subunit, thereby conferring a selective advantage over non-modified cells. SDS-related somatic EIF6 missense mutations that reduce eIF6 dosage or eIF6 binding to the 60S subunit suppress the defects in ribosome assembly and protein synthesis across multiple SBDS-deficient species including yeast, Dictyostelium and Drosophila. Our data suggest that SGR is a universal phenomenon that may influence the clinical evolution of diverse Mendelian disorders and support eIF6 suppressor mimics as a therapeutic strategy in SDS.
Original languageEnglish (US)
JournalNature Communications
Volume12
Issue number1
DOIs
StatePublished - Dec 1 2021
Externally publishedYes

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • General Chemistry
  • General Physics and Astronomy

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