Glutathionyl-Hydroquinone Reductases from Poplar are Plastidial Proteins that Deglutathionylate Both Reduced and Oxidized Glutathionylated Quinones.
Lallement, P., Meux, E., Gualberto, J.M., Dumarcay, S., Favier, F., Didierjean, C., Saul, F., Haouz, A., Morel-Rouhier, M., Gelhaye, E., Rouhier, N., Hecker, A.(2015) FEBS Lett 589: 37
- PubMed: 25455804
- DOI: https://doi.org/10.1016/j.febslet.2014.11.021
- Primary Citation of Related Structures:
4USS - PubMed Abstract:
Glutathionyl-hydroquinone reductases (GHRs) catalyze the deglutathionylation of quinones via a catalytic cysteine. The two GHR genes in the Populus trichocarpa genome, Pt-GHR1 and Pt-GHR2, are primarily expressed in reproductive organs. Both proteins are localized in plastids. More specifically, Pt-GHR2 localizes in nucleoids. At the structural level, Pt-GHR1 adopts a typical GHR fold, with a dimerization interface comparable to that of the bacterial and fungal GHR counterparts. Pt-GHR1 catalyzes the deglutathionylation of both reduced and oxidized glutathionylated quinones, but the enzyme is more catalytically efficient with the reduced forms.
Organizational Affiliation:
Université de Lorraine, Interactions Arbres - Microorganismes, UMR1136, F-54500 Vandœuvre-lès-Nancy, France; INRA, Interactions Arbres - Microorganismes, UMR1136, F-54280 Champenoux, France.