XB-ART-442
FEBS Lett
2006 Apr 17;5809:2381-7. doi: 10.1016/j.febslet.2006.03.064.
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Expression of the Arabidopsis high-affinity hexose transporter STP13 correlates with programmed cell death.
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We report the biochemical characterization in Xenopus oocytes of the Arabidopsis thaliana membrane protein, STP13, as a high affinity, hexose-specific H(+)-symporter. Studies with kinase activators suggest that it is negatively regulated by phosphorylation. STP13 promoter GFP reporter lines show GFP expression only in the vascular tissue in emerging petals under non-stressed conditions. Quantitative PCR and the pSTP13-GFP plants show induction of STP13 in programmed cell death (PCD) obtained by treatments with the fungal toxin fumonisin B1 and the pathogen Pseudomonas syringae. A role for STP13 in PCD is supported by microarray data from e.g. plants undergoing senescence and a strong correlation between STP13 transcripts and the PCD phenotype in different accelerated cell death (acd11) mutants.
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Species referenced: Xenopus
Genes referenced: dnah5 dnai1 pcbd1