Thioredoxin 2 from Escherichia coli is not involved in vivo in the recycling process of methionine sulfoxide reductase activities.

Date publication

juin 2011

Auteurs

Membres identifiés du Cancéropôle Est :
Pr BOSCHI-MULLER Sandrine , Dr JACOB Christophe

Tous les auteurs :
Jacob C, Kriznik A, Boschi-Muller S, Branlant G

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/21570393

Résumé

Thioredoxins (Trx) 1 and 2, and three methionine sulfoxide reductases (Msr) whose activities are Trx-dependent, are expressed in Escherichia coli. A metB(1)trxA mutant was shown to be unable to grow on methionine sulfoxide (Met-O) suggesting that Trx2 is not essential in the Msr-recycling process. In the present study, we have determined the kinetic parameters of the recycling process of the three Msrs by Trx2 and the in vivo expression of Trx2 in a metB(1)trxA mutant. The data demonstrate that the lack of growth of the metB(1)trxA mutant on Met-O is due to low in vivo expression of Trx2 and not to the lower catalytic efficiency of Msrs for Trx2.

Référence

FEBS Lett. 2011 Jun 23;585(12):1905-9