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  • Title: AtCCS is a functional homolog of the yeast copper chaperone Ccs1/Lys7.
    Author: Abdel-Ghany SE, Burkhead JL, Gogolin KA, Andrés-Colás N, Bodecker JR, Puig S, Peñarrubia L, Pilon M.
    Journal: FEBS Lett; 2005 Apr 25; 579(11):2307-12. PubMed ID: 15848163.
    Abstract:
    In plant chloroplasts two superoxide dismutase (SOD) activities occur, FeSOD and Cu/ZnSOD, with reciprocal regulation in response to copper availability. This system presents a unique model to study the regulation of metal-cofactor delivery to an organelle. The Arabidopsis thaliana gene AtCCS encodes a functional homolog to yeast Ccs1p/Lys7p, a copper chaperone for SOD. The AtCCS protein was localized to chloroplasts where it may supply copper to the stromal Cu/ZnSOD. AtCCS mRNA expression levels are upregulated in response to Cu-feeding and senescence. We propose that AtCCS expression is regulated to allow the most optimal use of Cu for photosynthesis.
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