Alternative splicing at NAGNAG acceptors in Arabidopsis thaliana SR and SR-related protein-coding genes
- Leibniz Institute for Age Research – Fritz Lipmann Institute, Jena (Germany); DOE/OSTI
- Leibniz Institute for Age Research – Fritz Lipmann Institute, Jena (Germany)
- Albert-Ludwigs-Univ. Freiburg (Germany). Inst. of Computer Science, Bioinformatics Group
- Colorado State Univ., Fort Collins, CO (United States). Dept. of Biology and Program in Molecular Plant Biology
Several recent studies indicate that alternative splicing in Arabidopsis and other plants is a common mechanism for post-transcriptional modulation of gene expression. However, few analyses have been done so far to elucidate the functional relevance of alternative splicing in higher plants. Representing a frequent and universal subtle alternative splicing event among eukaryotes, alternative splicing at NAGNAG acceptors contributes to transcriptome diversity and therefore, proteome plasticity. Alternatively spliced NAGNAG acceptors are overrepresented in genes coding for proteins with RNA-recognition motifs (RRMs). As SR proteins, a family of RRMcontaining important splicing factors, are known to be extensively alternatively spliced in Arabidopsis, we analyzed alternative splicing at NAGNAG acceptors in SR and SR-related genes. In a comprehensive analysis of the Arabidopsis thaliana genome, we identified 6,772 introns that exhibit a NAGNAG acceptor motif. Alternative splicing at these acceptors was assessed using available EST data, complemented by a sequence-based prediction method. Of the 36 identified introns within 30 SR and SR-related protein-coding genes that have a NAGNAG acceptor, we selected 15 candidates for an experimental analysis of alternative splicing under several conditions. We provide experimental evidence for 8 of these candidates being alternatively spliced. Quantifying the ratio of NAGNAG-derived splice variants under several conditions, we found organ-specific splicing ratios in adult plants and changes in seedlings of different ages. Splicing ratio changes were observed in response to heat shock and most strikingly, cold shock. Interestingly, the patterns of differential splicing ratios are similar for all analyzed genes. NAGNAG acceptors frequently occur in the Arabidopsis genome and are particularly prevalent in SR and SR-related protein-coding genes. A lack of extensive EST coverage can be compensated by using the proposed sequence-based method to predict alternative splicing at these acceptors. Our findings indicate that the differential effects on NAGNAG alternative splicing in SR and SR-related genes are organ- and condition-specific rather than gene-specific.
- Research Organization:
- Colorado State Univ., Fort Collins, CO (United States)
- Sponsoring Organization:
- Deutsche Forschungsgemeinschaft (DFG); Federal Ministry of Education and Research (BMBF); USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
- Grant/Contract Number:
- FG02-04ER15556
- OSTI ID:
- 1626462
- Journal Information:
- BMC Genomics, Journal Name: BMC Genomics Journal Issue: 1 Vol. 9; ISSN 1471-2164
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
A correlation with exon expression approach to identify cis-regulatory elements for tissue-specific alternative splicing
Comparative genomic analysis of the arthropod muscle myosin heavy chain genes allows ancestral gene reconstruction and reveals a new type of 'partially' processed pseudogene
Functional analysis of U1-70K interacting SR proteins in pre-mRNA splicing in Arabidopsis
Journal Article
·
Mon Jul 09 20:00:00 EDT 2007
· Nucleic Acids Research
·
OSTI ID:1625425
Comparative genomic analysis of the arthropod muscle myosin heavy chain genes allows ancestral gene reconstruction and reveals a new type of 'partially' processed pseudogene
Journal Article
·
Tue Feb 05 19:00:00 EST 2008
· BMC Molecular Biology
·
OSTI ID:1626500
Functional analysis of U1-70K interacting SR proteins in pre-mRNA splicing in Arabidopsis
Technical Report
·
Mon Nov 24 23:00:00 EST 2008
·
OSTI ID:941683