Journal
CELLULAR AND MOLECULAR LIFE SCIENCES
Volume 67, Issue 22, Pages 3763-3784Publisher
SPRINGER BASEL AG
DOI: 10.1007/s00018-010-0445-0
Keywords
Expression evidence; Gene diversification; Metal transporters; Populus trichocarpa
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Funding
- ANR PREC-ODD [ANR-06-ECOT-O15-01]
- Agence de l'Environnement et de la Maitrise de l'Energie (ADEME)
- Conseil Regional de Lorraine
- Natural Science and Engineering Research Council of Canada (NSERC)
- NSERC
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The specific transport of metal ions, mediated by membrane-localized metal transporters, is of fundamental importance in all eukaryotes. Genome-wide analysis of metal transporters was undertaken, making use of whole genome sequences of the green alga Chlamydomonas reinhardtii, the moss Physcomitrella patens, the lycophyte Selaginella moellendorffii, the monocots rice and sorghum, and the dicots Arabidopsis thaliana, poplar, grapevine, as well as of the yeast Saccharomyces cerevisiae. A repertoire of 430 metal transporters was found in total across eight photosynthetic plants, as well as in S. cerevisiae. Seventy-two full-length metal transporter genes were identified in the Populus genome alone, which is the largest number of metal transporters genes identified in any single species to date. Diversification of some transporter family gene clusters appears to have occurred in a lineage-specific manner. Expression analysis of Populus metal transporters indicates that some family members show tissue-specific transcript abundance. Taken together, the data provide a picture into the diversification of these important gene families.
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