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. 1989 Oct;86(19):7351–7355. doi: 10.1073/pnas.86.19.7351

Expression and nucleotide sequence of a plasmid-determined divalent cation efflux system from Alcaligenes eutrophus.

D H Nies 1, A Nies 1, L Chu 1, S Silver 1
PMCID: PMC298059  PMID: 2678100

Abstract

Resistance to cobalt, zinc, and cadmium specified by the czc determinant on plasmid pMOL30 in Alcaligenes eutrophus results from a cation efflux system. Five membrane-bound polypeptides that were expressed in Escherichia coli from this determinant under the control of a phage T7 promoter were assigned to four open reading frames identified in the nucleotide sequence of the 6881-base-pair fragment containing the czc putative operon. The contributions of the polypeptides to the cation efflux system were analyzed with deletion derivatives of the 6.9-kilobase fragment, constructed, and expressed in E. coli under the control of the phage T7 promoter and in A. eutrophus under the control of the lac promoter.

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Selected References

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