Gene-specific expression and calcium activation of Arabidopsis thaliana phospholipase C isoforms. Hunt, L., Otterhag, L., Lee, J. C., Lasheen, T., Hunt, J., Seki, M., Shinozaki, K., Sornmarin, M., Gilmour, D. J., Pical, C., & Gray, J. E. New Phytologist, 162(3):643–654, June, 2004. Place: Malden Publisher: Wiley-Blackwell WOS:000221913500007doi abstract bibtex PI-PLCs synthesise the calcium releasing second messenger IP(3). We investigated the expression patterns of the Arabidopsis PI-PLC gene family and measured in vitro activity of encoded enzymes. Gene specific RT-PCR and promoter-GUS fusions were used to analyse AtPLC gene expression patterns. The five available AtPLC cDNAs were expressed as fusion proteins in Escherichia coli. All members of the AtPLC gene family were expressed in multiple organs of the plant. AtPLC1, and AtPLC5 expression was localized to the vascular cells of roots and leaves with AtPLC5::GUS also detected in the guard cells. AtPLC4::GUS was detected in pollen and cells of the stigma surface. In seedlings, AtPLC2 and AtPLC3 were constitutively expressed, while AtPLCs 1, 4 and 5 were induced by abiotic stresses. AtPLC1-5 were all shown to have phospholipase C activity in the presence of calcium ions. AtPLCs showed limited tissue specific expression and expression of at least three genes was increased by abiotic stress. The differing calcium sensitivities of recombinant AtPLC protein activities may provide a mechanism for generating calcium signatures.
@article{hunt_gene-specific_2004,
title = {Gene-specific expression and calcium activation of {Arabidopsis} thaliana phospholipase {C} isoforms},
volume = {162},
issn = {0028-646X},
doi = {10/bps2mq},
abstract = {PI-PLCs synthesise the calcium releasing second messenger IP(3). We investigated the expression patterns of the Arabidopsis PI-PLC gene family and measured in vitro activity of encoded enzymes. Gene specific RT-PCR and promoter-GUS fusions were used to analyse AtPLC gene expression patterns. The five available AtPLC cDNAs were expressed as fusion proteins in Escherichia coli. All members of the AtPLC gene family were expressed in multiple organs of the plant. AtPLC1, and AtPLC5 expression was localized to the vascular cells of roots and leaves with AtPLC5::GUS also detected in the guard cells. AtPLC4::GUS was detected in pollen and cells of the stigma surface. In seedlings, AtPLC2 and AtPLC3 were constitutively expressed, while AtPLCs 1, 4 and 5 were induced by abiotic stresses. AtPLC1-5 were all shown to have phospholipase C activity in the presence of calcium ions. AtPLCs showed limited tissue specific expression and expression of at least three genes was increased by abiotic stress. The differing calcium sensitivities of recombinant AtPLC protein activities may provide a mechanism for generating calcium signatures.},
language = {English},
number = {3},
journal = {New Phytologist},
author = {Hunt, L. and Otterhag, L. and Lee, J. C. and Lasheen, T. and Hunt, J. and Seki, M. and Shinozaki, K. and Sornmarin, M. and Gilmour, D. J. and Pical, C. and Gray, J. E.},
month = jun,
year = {2004},
note = {Place: Malden
Publisher: Wiley-Blackwell
WOS:000221913500007},
keywords = {Arabidopsis, abscisic-acid, calcium, cyclic adp-ribose, cytosolic-free calcium, diacylglycerol pyrophosphate, gene expression, guard cell, guard-cells, inositol 1,4,5-trisphosphate, papaver-rhoeas, phosphatidylinositol 4,5-bisphosphate, phosphoinositide turnover, phospholipase C, pi-plc, pollen, self-incompatibility response, stress},
pages = {643--654},
}
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All members of the AtPLC gene family were expressed in multiple organs of the plant. AtPLC1, and AtPLC5 expression was localized to the vascular cells of roots and leaves with AtPLC5::GUS also detected in the guard cells. AtPLC4::GUS was detected in pollen and cells of the stigma surface. In seedlings, AtPLC2 and AtPLC3 were constitutively expressed, while AtPLCs 1, 4 and 5 were induced by abiotic stresses. AtPLC1-5 were all shown to have phospholipase C activity in the presence of calcium ions. AtPLCs showed limited tissue specific expression and expression of at least three genes was increased by abiotic stress. 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