TY - JOUR
T1 - The role of antioxidants enzymes of E. coli ASU3, a tolerant strain to heavy metals toxicity, in combating oxidative stress of copper
AU - Abskharon, Romany N.N.
AU - Hassan, Sedky H.A.
AU - Kabir, Mohammad Humayun
AU - Qadir, Syed Abdul
AU - El-Rab, Sanaa M.F.Gad
AU - Wang, Myeong Hyeon
PY - 2010/2
Y1 - 2010/2
N2 - The current study describes the isolation and characterization of E. coli from wastewater that collected from El-Malah canal in Assiut, Egypt. Twelve isolates were investigated for heavy metal resistance by which one of them showed multiple metal resistances. Furthermore, the bacterium was identified as E. coli ASU3 according to biochemical tests and then, preserved at Assuit University Mycological Centre with accession number AUMC B83. It exhibited high minimal inhibitory concentrations for metals and antibiotic resistance. The order of metals toxicity to the bacterium was Cr6+ > Cu2+ > Co2+ > Pb2+ > Ni2+ > Cr3+ > Cd2+ > Zn2+. Total protein content of E. coli ASU3 decreased with the increase of copper concentration. Under exposure of different concentrations of copper, the induction of antioxidant enzymes such as catalase, peroxidase and ascorbate peroxidase was increased and these antioxidant enzymes can contribute to combating oxidative stresses.
AB - The current study describes the isolation and characterization of E. coli from wastewater that collected from El-Malah canal in Assiut, Egypt. Twelve isolates were investigated for heavy metal resistance by which one of them showed multiple metal resistances. Furthermore, the bacterium was identified as E. coli ASU3 according to biochemical tests and then, preserved at Assuit University Mycological Centre with accession number AUMC B83. It exhibited high minimal inhibitory concentrations for metals and antibiotic resistance. The order of metals toxicity to the bacterium was Cr6+ > Cu2+ > Co2+ > Pb2+ > Ni2+ > Cr3+ > Cd2+ > Zn2+. Total protein content of E. coli ASU3 decreased with the increase of copper concentration. Under exposure of different concentrations of copper, the induction of antioxidant enzymes such as catalase, peroxidase and ascorbate peroxidase was increased and these antioxidant enzymes can contribute to combating oxidative stresses.
KW - Antioxidant enzymes
KW - Copper
KW - E. coli
KW - Oxidative stress
KW - Tolerance
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U2 - 10.1007/s11274-009-0166-4
DO - 10.1007/s11274-009-0166-4
M3 - Article
AN - SCOPUS:77951126799
SN - 0959-3993
VL - 26
SP - 241
EP - 247
JO - World Journal of Microbiology and Biotechnology
JF - World Journal of Microbiology and Biotechnology
IS - 2
ER -