What makes A. guillouiae SFC 500-1A able to co-metabolize phenol and Cr (VI)? A proteomic approach

JOURNAL OF HAZARDOUS MATERIALS

卷:354

Article

Mailen Ontanon, Ornella^1,2  Landi, Claudia³  Carleo, Alfonso^3,4  Gagliardi, Assunta^3,5  Bianchi, Laura³  Solange Gonzalez, Paola^1,2  Agostini, Elizabeth^1,2  Bini, Luca³ 

[1] Natl Univ Rio Cuarto, Dept Mol Biol, Cordoba, Argentina

[2] Natl Council Sci & Technol Res CONICET, Buenos Aires, DF, Argentina

[3] Univ Siena, Lab Funct Prote, Dept Life Sci, Siena, Italy

[4] Hannover Med Sch, Dept Pulmonol, Hannover, Germany

[5] Univ Trento, Ctr Integrat Biol CIBIO, Trento, Italy

关键词: Simultaneous bioremediation;    Phenol;    Chromium (VI);    Proteomics;    Acinetobacter;   

DOI  :  10.1016/j.jhazmat.2018.04.068

来源: Elsevier

【 摘 要 】

Acinetobacter guillouiae SFC 500-1A is an environmental bacterium able to efficiently co-remediate phenol and Cr (VI). To further understand the molecular mechanisms triggered in this strain during the bioremediation process, variations in the proteomic profile after treatment with phenol and phenol plus Cr(VI) were evaluated. The proteomic analysis revealed the induction of the beta-ketoadipate pathway for phenol oxidation and the assimilation of degradation products through TCA cycle and glyoxylate shunt. Phenol exposure increased the abundance of proteins associated to energetic processes and All, synthesis, but it also triggered cellular stress. The lipid bilayer was suggested as a target of phenol toxicity, and changing fatty acids composition seemed to be the bacterial response to protect the membrane integrity. The involvement of two flavoproteins in Cr(VI) reduction to Cr(III) was also proposed. The results suggested the important role of chaperones, antioxidant response and SOS-induced proteins in the ability of the strain to mitigate the damage generated by phenol and Cr (VI). This research contributes to elucidate the mechanisms involved in A. guillouiae SFC 500-1A tolerance and co-remediation of phenol and Cr(VI). Such information may result useful not only to improve its bioremediation efficiency but also to identify putative markers of resistance in environmental bacteria.

【 授权许可】

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