Journal
MOLECULAR CELL
Volume 22, Issue 6, Pages 769-781Publisher
CELL PRESS
DOI: 10.1016/j.molcel.2006.05.008
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Exonic splicing regulatory sequences (ESRs) are cisacting factor binding sites that regulate constitutive and alternative splicing. A computational method based on the conservation level of wobble positions and the overabundance of sequence motifs between 46,103 human and mouse orthologous exons was developed, identifying 285 putative ESRs. Alternatively spliced exons that are either short in length or contain weak splice sites show the highest conservation level of those ESRs, especially toward the edges of exons. ESRs that are abundant in those subgroups show a different distribution between constitutively and alternatively spliced exons. Representatives of these ESRs and two SR protein binding sites were shown, experimentally, to display variable regulatory effects on alternative splicing, depending on their relative locations in the exon. This finding signifies the delicate positional effect of ESRs on alternative splicing regulation.
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