3'-5' phosphoadenosine phosphate is an inhibitor of PARP-1 and a potential mediator of the lithium-dependent inhibition of PARP-1 in vivo.

Elie Toledano 1, * Vasily Ogryzko 2 Antoine Danchin 3 Daniel Ladant 1 Undine Mechold 1, *
* Auteur correspondant
1 Biochimie des Interactions Macromoléculaires
2 IMC (UMR 8126) - Interactions moléculaires et cancer
3 AMAbiotics SAS
Abstract : pAp (3'-5' phosphoadenosine phosphate) is a by-product of sulfur and lipid metabolism and has been shown to have strong inhibitory properties on RNA catabolism. In the present paper we report a new target of pAp, PARP-1 [poly(ADP-ribose) polymerase 1], a key enzyme in the detection of DNA single-strand breaks. We show that pAp can interact with PARP-1 and inhibit its poly(ADP-ribosyl)ation activity. In vitro, inhibition of PARP-1 was detectable at micromolar concentrations of pAp and altered both PARP-1 automodification and heteromodification of histones. Analysis of the kinetic parameters revealed that pAp acted as a mixed inhibitor that modulated both the Km and the Vmax of PARP-1. In addition, we showed that upon treatment with lithium, a very potent inhibitor of the enzyme responsible for pAp recycling, HeLa cells exhibited a reduced level of poly(ADP-ribosyl)ation in response to oxidative stress. From these results, we propose that pAp might be a physiological regulator of PARP-1 activity.
Type de document :
Article dans une revue
Biochemical Journal, Portland Press, 2012, 443 (2), pp.485-90. 〈10.1042/BJ20111057〉
Liste complète des métadonnées

Littérature citée [40 références]  Voir  Masquer  Télécharger
https://hal-pasteur.archives-ouvertes.fr/pasteur-01427528
Contributeur : Undine Mechold <>
Soumis le : jeudi 5 janvier 2017 - 17:40:41
Dernière modification le : mercredi 28 février 2018 - 10:38:39
Document(s) archivé(s) le : jeudi 6 avril 2017 - 14:46:39

Fichier

PARPElie2012.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

PASTEUR | FNCLCC | IGR

Citation

Elie Toledano, Vasily Ogryzko, Antoine Danchin, Daniel Ladant, Undine Mechold. 3'-5' phosphoadenosine phosphate is an inhibitor of PARP-1 and a potential mediator of the lithium-dependent inhibition of PARP-1 in vivo.. Biochemical Journal, Portland Press, 2012, 443 (2), pp.485-90. 〈10.1042/BJ20111057〉. 〈pasteur-01427528〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

103

Téléchargements de fichiers

124