Abstract
Alternative splicing (AS) is a mechanism with which two or more forms of mature-mRNAs are generated from a single form of pre-mature mRNA. We found more than 5,000 genes in Arabidopsis thaliana having AS events, with bioinformatics approach. Our previous study showed that "AS profiles" were affected by expression tissues or environmental stresses. In this study, we approached AS events on splicing factors. We found many pre-mRNAs encoding SR proteins were alternatively spliced. Also we found several events were conserved between Arabidopsis and rice. The conserved AS make mRNAs encoding SR proteins with incomplete RNA recognition motifs. It seems to be important to decreasing the amount of functional SR proteins by the AS. Farther, we found AS events with NAGNAG accepters were enriched in transcription factors encoded mRNAs. It is known that such events tend to change charges of proteins. The events may be also important to regulate whole transcriptome.
