title: Co-regulation of alternative splicing by diverse splicing factors in Caenorhabditis elegans.
abstract: Regulation of alternative splicing is controlled by pre-mRNA sequences (cis-elements) and trans-acting protein factors that bind them. The combinatorial interactions of multiple protein factors with the cis-elements surrounding a given alternative splicing event lead to an integrated splicing decision. The mechanism of multifactorial splicing regulation is poorly understood. Using a splicing-sensitive DNA microarray, we assayed 352 Caenorhabditis elegans alternative cassette exons for changes in embryonic splicing patterns between wild-type and 12 different strains carrying mutations in a splicing factor. We identified many alternative splicing events that are regulated by multiple splicing factors. Many splicing factors have the ability to behave as splicing repressors for some alternative cassette exons and as splicing activators for others. Unexpectedly, we found that the ability of a given alternative splicing factor to behave as an enhancer or repressor of a specific splicing event can change during development. Our observations that splicing factors can change their effects on a substrate during development support a model in which combinatorial effects of multiple factors, both constitutive and developmentally regulated ones, contribute to the overall splicing decision.
authors.affiliation: Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, CA 95064, USA.
authors.forename: Sergio
authors.initials: S
authors.lastname: Barberan-Soler
authors.forename: Pedro
authors.initials: P
authors.lastname: Medina
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Estella
authors.forename: James
authors.initials: J
authors.lastname: Williams
authors.forename: Alan M
authors.initials: AM
authors.lastname: Zahler
mesh_terms: D017398:Alternative Splicing; D000818:Animals; D017173:Caenorhabditis elegans / Q000196:embryology / Q000235:genetics* / Q000378:metabolism; D029742:Caenorhabditis elegans Proteins / Q000235:genetics / Q000502:physiology*; D009154:Mutation; D020411:Oligonucleotide Array Sequence Analysis; D016601:RNA-Binding Proteins / Q000235:genetics / Q000502:physiology*
chemical_list: D029742:Caenorhabditis elegans Proteins; D016601:RNA-Binding Proteins
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