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ChrASO, the chromate efflux pump of Shewanella oneidensis, improves chromate survival and reduction

Article scientifique 2017 Anglais

Résumé

The chromate efflux pump encoding gene chrASO was identified on the chromosome of Shewanella oneidensis MR1. Although chrASO is expressed without chromate, its expression level increases when Cr(VI) is added. When deleted, the resulting mutant ΔchrASO exhibits a chromate sensitive phenotype compared to that of the wild-type strain. Interestingly, heterologous expression of chrASO in E. coli confers resistance to high chromate concentration. Moreover, expression of chrASO in S. oneidensis and E. coli significantly improves Cr(VI) reduction. This effect could result either from extracytoplasmic chromate reduction or from a better cell survival leading to enhanced Cr(VI) reduction.

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Baaziz, H., Gambari, C., Boyeldieu, A., Chaouche, A., Alatou, R., Méjean, V., Jourlin‐Castelli, C., Fons, M. (2017). ChrASO, the chromate efflux pump of Shewanella oneidensis, improves chromate survival and reduction. https://doi.org/10.1371/journal.pone.0188516

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Auteur(s)

Hiba Baaziz Cyril Gambari Anne Boyeldieu Amine Ali Chaouche Radia Alatou Vincent Méjean Cécile Jourlin‐Castelli Michel Fons

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