Defects in t6A tRNA modification due to GON7 and YRDC mutations lead to Galloway-Mowat syndrome

Christelle Arrondel, Sophia Missoury, Rozemarijn Snoek, Julie Patat, Giulia Menara, Bruno Collinet, Dominique Liger, Dominique Durand, Olivier Gribouval, Olivia Boyer, Laurine Buscara, Gaëlle Martin, Eduardo Machuca, Fabien Nevo, Ewen Lescop, Daniela A. Braun, Anne Claire Boschat, Sylvia Sanquer, Ida Chiara Guerrera, Patrick RevyMélanie Parisot, Cécile Masson, Nathalie Boddaert, Marina Charbit, Stéphane Decramer, Robert Novo, Marie Alice Macher, Bruno Ranchin, Justine Bacchetta, Audrey Laurent, Sophie Collardeau-Frachon, Albertien M. van Eerde, Friedhelm Hildebrandt, Daniella Magen, Corinne Antignac, Herman van Tilbeurgh, Géraldine Mollet*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

N6-threonyl-carbamoylation of adenosine 37 of ANN-type tRNAs (t6A) is a universal modification essential for translational accuracy and efficiency. The t6A pathway uses two sequentially acting enzymes, YRDC and OSGEP, the latter being a subunit of the multiprotein KEOPS complex. We recently identified mutations in genes encoding four out of the five KEOPS subunits in children with Galloway-Mowat syndrome (GAMOS), a clinically heterogeneous autosomal recessive disease characterized by early-onset steroid-resistant nephrotic syndrome and microcephaly. Here we show that mutations in YRDC cause an extremely severe form of GAMOS whereas mutations in GON7, encoding the fifth KEOPS subunit, lead to a milder form of the disease. The crystal structure of the GON7/LAGE3/OSGEP subcomplex shows that the intrinsically disordered GON7 protein becomes partially structured upon binding to LAGE3. The structure and cellular characterization of GON7 suggest its involvement in the cellular stability and quaternary arrangement of the KEOPS complex.

Original languageEnglish
Article number3967
Pages (from-to)1-13
JournalNature Communications
Volume10
Issue number1
DOIs
Publication statusPublished - 3 Sept 2019

Keywords

  • Adenosine/analogs & derivatives
  • Child
  • Female
  • GTP-Binding Proteins/chemistry
  • Hernia, Hiatal/genetics
  • Humans
  • Intrinsically Disordered Proteins/genetics
  • Male
  • Microcephaly/genetics
  • Multiprotein Complexes/chemistry
  • Mutation
  • Nephrosis/genetics
  • Nuclear Proteins/chemistry
  • RNA, Transfer/genetics
  • RNA-Binding Proteins/chemistry

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