Abstract
Plants are highly adapted to respond to a range of environmental stresses commonly by altering their gene expression and metabolism as a result of cell signalling which may be mediated by reactive oxygen species. The glycine-rich RNA-binding proteins ATGRP7 and ATGRP8 were rapidly upregulated in response to peroxide-induced oxidative stress and were amongst the most abundant RNA binding proteins isolated by oligo(dT) chromatography. The oligo(dT)-bound mRNP complexes were analysed proteomically, and were seen to contain potential isoforms of the ATGRP proteins; other proteins that contain an RNA Recognition Motif (RRM); and chloroplast RNA binding proteins. These findings suggest that ATGRP proteins have an evolutionarily conserved function in the regulation of gene expression at the posttranscriptional level in response to environmental stress.
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Acknowledgments
Aline Marnef was supported by a Summer Vacation Studentship awarded by the Nuffield Foundation (URB/01948/G); and Fabian Schmidt was supported by the German Academic Exchange Programme and by the Faculty of Health and Life Sciences, University of the West of England, Bristol. This work was also supported by the German Research Council (DFG) through grant STA 653/2 to D.S. We wish to thank Jenna Slinn and Mervyn Lewis for technical assistance with MALDI-Tof mass spectrometry.
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Schmidt, F., Marnef, A., Cheung, MK. et al. A proteomic analysis of oligo(dT)-bound mRNP containing oxidative stress-induced Arabidopsis thaliana RNA-binding proteins ATGRP7 and ATGRP8. Mol Biol Rep 37, 839–845 (2010). https://doi.org/10.1007/s11033-009-9636-x
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DOI: https://doi.org/10.1007/s11033-009-9636-x