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Complementation of Saccharomyces cerevisiae ccc2 mutant by a putative P1B-ATPase from Brassica napus supports a copper-transporting function



Complementation of Saccharomyces cerevisiae ccc2 mutant by a putative P1B-ATPase from Brassica napus supports a copper-transporting function



Febs Letters 566(1-3): 218-222



Copper transport across membranes plays an important role in plant growth and survival. P(1B)-type ATPases participate in transmembrane transport of copper in various organisms. A Brassica napus cDNA (BnRAN1) encoding a putative Cu(2+)-ATPase was cloned in this study. A complementation assay demonstrated that the protein encoded by this cDNA could functionally replace Ccc2p, a Saccharomyces cerevisiae Cu(2+)-ATPase, rescuing growth of ccc2 mutant under iron-limited conditions. Our results suggest that this rescue likely resulted from restoration of copper delivery, mediated by BnRAN1, to Fet3p. This study is amongst the first to demonstrate that a putative plant P(1B)-ATPase is functional and to examine its substrate specificity.

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Accession: 004084256

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PMID: 15147898

DOI: 10.1016/j.febslet.2004.04.035


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