Information contents and dinucleotide compositions of plant intron sequences vary with evolutionary origin |
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| Authors: | Owen White Carol Soderlund Pari Shanmugan Chris Fields |
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| Affiliation: | (1) Computing Research Laboratory, New Mexico State University, Box 30001/3CRL, 88003-0001 Las Cruces, NM, USA;(2) Present address: Theoretical Biology and Biophysics (T-10), Los Alamos National Laboratory, 87545 Los Alamos, NM, USA |
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| Abstract: | The DNA sequence composition of 526 dicot and 345 monocot intron sequences have been characterized using computational methods. Splice site information content and bulk intron and exon dinucleotide composition were determined. Positions 4 and 5 of 5 splice sites contain different statistically significant levels of information in the two groups. Basal levels of information in introns are higher in dicots than in monocots. Two dinucleotide groups, WW (AA, AU, UA, UU) and SS (CC, CG, GC, GG) have significantly different frequencies in exons and introns of the two plant groups. These results suggest that the mechanisms of splice-site recognition and binding may differ between dicot and monocot plants. |
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| Keywords: | computation dinucleotide information intron splice site |
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