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ZIRC
ZFIN ID: ZDB-PUB-140113-13
Glutaredoxin regulates vascular development by reversible glutathionylation of sirtuin 1
Bräutigam, L., Jensen, L.D., Poschmann, G., Nyström, S., Bannenberg, S., Dreij, K., Lepka, K., Prozorovski, T., Montano, S.J., Aktas, O., Uhlén, P., Stühler, K., Cao, Y., Holmgren, A., and Berndt, C.
Date: 2013
Source: Proc. Natl. Acad. Sci. USA 110(50): 20057-20062 (Journal)
Registered Authors:
Keywords: cardiovascular system, proteomics
MeSH Terms:
  • Animals
  • Blotting, Western
  • Cardiovascular System/embryology*
  • DNA Primers/genetics
  • Gene Knockdown Techniques
  • Glutaredoxins/genetics
  • Glutaredoxins/metabolism*
  • Glutathione/metabolism*
  • HeLa Cells
  • Humans
  • Mass Spectrometry
  • Microscopy, Confocal
  • Neovascularization, Physiologic/physiology*
  • Oxidation-Reduction
  • Real-Time Polymerase Chain Reaction
  • Signal Transduction/genetics
  • Signal Transduction/physiology*
  • Sirtuin 1/metabolism*
  • Time-Lapse Imaging
  • Zebrafish
PubMed: 24277839 Full text @ Proc. Natl. Acad. Sci. USA
FIGURES
ABSTRACT

Embryonic development depends on complex and precisely orchestrated signaling pathways including specific reduction/oxidation cascades. Oxidoreductases of the thioredoxin family are key players conveying redox signals through reversible posttranslational modifications of protein thiols. The importance of this protein family during embryogenesis has recently been exemplified for glutaredoxin 2, a vertebrate-specific glutathione–disulfide oxidoreductase with a critical role for embryonic brain development. Here, we discovered an essential function of glutaredoxin 2 during vascular development. Confocal microscopy and time-lapse studies based on two-photon microscopy revealed that morpholino-based knockdown of glutaredoxin 2 in zebrafish, a model organism to study vertebrate embryogenesis, resulted in a delayed and disordered blood vessel network. We were able to show that formation of a functional vascular system requires glutaredoxin 2-dependent reversible S-glutathionylation of the NAD+-dependent protein deacetylase sirtuin 1. Using mass spectrometry, we identified a cysteine residue in the conserved catalytic region of sirtuin 1 as target for glutaredoxin 2-specific deglutathionylation. Thereby, glutaredoxin 2-mediated redox regulation controls enzymatic activity of sirtuin 1, a mechanism we found to be conserved between zebrafish and humans. These results link S-glutathionylation to vertebrate development and successful embryonic angiogenesis.

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