Features of evolutionarily conserved alternative splicing events between Brassica and Arabidopsis
Article first published online: 2 APR 2013
© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust
Volume 199, Issue 1, pages 252–263, July 2013
How to Cite
Darracq, A. and Adams, K. L. (2013), Features of evolutionarily conserved alternative splicing events between Brassica and Arabidopsis. New Phytologist, 199: 252–263. doi: 10.1111/nph.12238
- Issue published online: 28 MAY 2013
- Article first published online: 2 APR 2013
- Manuscript Accepted: 18 FEB 2013
- Manuscript Received: 30 NOV 2012
- Natural Science and Engineering Council of Canada
- alternative splicing (AS);
- molecular evolution;
- splice variants
- Alternative splicing (AS) generates multiple types of mRNA from a single type of pre-mRNA by differential intron splicing. It can result in new protein isoforms or down-regulation of gene expression by transcript decay. The evolutionary conservation of AS events in plants is largely unexplored and only a small number of AS events have been identified as conserved between divergent species.
- We performed a large-scale analysis of cDNA data from Brassica and Arabidopsis to identify and further characterize conserved AS events.
- We identified 537 conserved AS events in 485 genes. Alternative donor and acceptor events are significantly overrepresented among conserved events, whereas intron retention and exon skipping events are underrepresented. Conserved AS events are significantly shorter, less likely to be in the 3′UTR, and they are enriched for genes whose products function in the chloroplast. AS modified a functional domain for about half of the genes with conserved events. We further characterized three genes with conserved AS events.
- This study identifies many AS events that are conserved between Brassica and Arabidopsis, revealing features of conserved AS events. Many of the conserved AS events may have important, but uncharacterized, functions.