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Curr Microbiol. 2002 Dec;45(6):410-4.

Mechanism of copper resistance in a copper mine isolate Pseudomonas putida strain S4.

Author information

1
Department of Genetics, University of Delhi South Campus, New Delhi-110021, India.

Abstract

The mechanism of copper resistance in a multiple-metal-resistant natural isolate Pseudomonas putida strain S4 is based on inducible efflux. Active extrusion of copper ions occurs from the cytoplasm during the exponential phase of growth. Involvement of ATPase in the efflux of copper ions has been demonstrated by employing specific inhibitors. The effluxed copper is not thrown out of the cell, but remains in a bound form (to a protein) in the periplasm. Thus, a balance between the intracellular level, to fulfill the metabolic requirements, and the periplasmic sequestration, to evade toxicity, is maintained by this isolate.

PMID:
12402081
DOI:
10.1007/s00284-002-3787-5
[Indexed for MEDLINE]

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