Evidence for the plant-specific intercellular transport of the Arabidopsis copper chaperone CCH
comunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/36080
comunitat-uji-handle3:10234/36082
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http://dx.doi.org/10.1046/j.1365-313x.2001.00985.x |
Metadata
Title
Evidence for the plant-specific intercellular transport of the Arabidopsis copper chaperone CCHDate
2001-03Publisher
WileyISSN
0960-7412Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionSubject
Abstract
Arabidopsis copper chaperone (CCH) belongs to a family of eukaryotic proteins that participates in intracellular copper homeostasis by delivering this metal to the secretory pathway. In this work we show that the CCH ... [+]
Arabidopsis copper chaperone (CCH) belongs to a family of eukaryotic proteins that participates in intracellular copper homeostasis by delivering this metal to the secretory pathway. In this work we show that the CCH protein is mainly located along the vascular bundles of senescing leaves and petioles, as shown by tissue prints and immunohistochemical detection. CCH protein also accumulates in stem sieve elements and is collected in phloem exudates. Accordingly, Arabidopsis CCH is the only member of the metallochaperone family described to function intercellularly to date. Moreover, the CCH protein remains stable when plants are subjected to excess copper that causes a rapid and specific decrease in its mRNA. These facts point to a role for CCH in copper mobilization from decaying organs towards reproductive structures, as a result of metalloprotein breakdown. [-]
Is part of
The Plant Journal, v. 25, n. 5, p. 521–528Rights
Copyright © 2001 Blackwell Science Ltd
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This item appears in the folowing collection(s)
- MED_Articles [636]