Computational comparative analyses of alternative splicing regulation using full-length cDNA of various eukaryotes

Hitomi Itoh, Takanori Washio, Masaru Tomita

Research output: Contribution to journalArticle

44 Citations (Scopus)


We previously reported a computational approach to infer alternative splicing patterns from Mus musculus full-length cDNA clones and microarray data. Although we predicted a large number of unreported splice variants, the general mechanisms regulating alternative splicing were yet unknown. In the present study, we compared alternative exons and constitutive exons in terms of splice-site strength and frequency of potential regulatory sequences. These regulatory features were further compared among five different species: Homo sapiens, M. musculus, Arabidopsis thaliana, Oryza sativa, and Drosophila melanogaster. Solid statistical validations of our comparative analyses indicated that alternative exons have (1) weaker splice sites and (2) more potential regulatory sequences than constitutive exons. Based on our observations, we propose a combinatorial model of alternative splicing mechanisms, which suggests that alternative exons contain weak splice sites regulated alternatively by potential regulatory sequences on the exons.

Original languageEnglish
Pages (from-to)1005-1018
Number of pages14
Issue number7
Publication statusPublished - 2004 Jul 1



  • Alternative splicing
  • ESEs
  • Exonic splicing enhancers
  • Splice-site strength

ASJC Scopus subject areas

  • Molecular Biology

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