Nature Communications (Sep 2022)

O-GlcNAcylation enhances CPS1 catalytic efficiency for ammonia and promotes ureagenesis

  • Leandro R. Soria,
  • Georgios Makris,
  • Alfonso M. D’Alessio,
  • Angela De Angelis,
  • Iolanda Boffa,
  • Veronica M. Pravata,
  • Véronique Rüfenacht,
  • Sergio Attanasio,
  • Edoardo Nusco,
  • Paola Arena,
  • Andrew T. Ferenbach,
  • Debora Paris,
  • Paola Cuomo,
  • Andrea Motta,
  • Matthew Nitzahn,
  • Gerald S. Lipshutz,
  • Ainhoa Martínez-Pizarro,
  • Eva Richard,
  • Lourdes R. Desviat,
  • Johannes Häberle,
  • Daan M. F. van Aalten,
  • Nicola Brunetti-Pierri

DOI
https://doi.org/10.1038/s41467-022-32904-x
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 14

Abstract

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Hyperammonemia occurs in liver diseases affecting ureagenesis, and is life-threatening. Here, the authors show that liver UDP-GlcNAc is increased during hyperammonemia, leading to O-GlcNAcylation of the rate-limiting ureagenesis enzyme CPS1, that enhanced ureagenesis and ammonia detoxification. They also showed that pharmacological increase of protein O-GlcNAcylation reduces hyperammonemia in mouse models of liver disease.