Delivering copper within plant cells.
Two genes recently identified in Arabidopsis thaliana may be involved in sequestering free copper ions in the cytoplasm and delivering copper to post-Golgi vesicles. The genes COPPER CHAPERONE and RESPONSIVE TO ANTAGONIST1 are homologous to copper-trafficking genes from yeast and humans. This plant copper-delivery pathway is required to create functional ethylene receptors. The pathway may also facilitate the transport of copper from senescing leaf tissue. In addition, several other genes have been identified recently that may have a role in copper salvage during senescence.
Himelblau
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Department of Biochemistry, University of Wisconsin, Madison, WI 53706, USA. ethimelb@students.wisc.edu
Amasino
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RM
D029681:Arabidopsis Proteins; D001692:Biological Transport; D027682:Cation Transport Proteins; D003300:Copper / Q000378:metabolism*; D000079922:Copper Transport Proteins; D005030:Ethylenes / Q000378:metabolism; D059828:Plant Cells; D063245:Plant Development; D010944:Plants / Q000378:metabolism*; D011494:Protein Kinases / Q000502:physiology; D016601:RNA-Binding Proteins; D020931:ran GTP-Binding Protein
D029681:Arabidopsis Proteins; C490178:At5g20010 protein, Arabidopsis; D027682:Cation Transport Proteins; D000079922:Copper Transport Proteins; D005030:Ethylenes; D016601:RNA-Binding Proteins; D003300:Copper; C036216:ethylene; D011494:Protein Kinases; D020931:ran GTP-Binding Protein