Allemand et al., 2001, Mol. Cell. Biol. 21(4): 1345--1359

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Allemand et al., 2001, Mol. Cell. Biol. 21(4): 1345--1359
FlyBase Identifier FBrf0132409
FlyBase URL http://flybase.org/reports/FBrf0132409.html
Publication Type paper
Publication Year 2001
PubMed ID 11158320
PubMed URL http://www.ncbi.nlm.nih.gov/pubmed/11158320

Title

Distinctive features of Drosophila alternative splicing factor RS domain: implication for specific phosphorylation, shuttling, and splicing activation.

Abstract

The human splicing factor 2, also called human alternative splicing factor (hASF), is the prototype of the highly conserved SR protein family involved in constitutive and regulated splicing of metazoan mRNA precursors. Here we report that the Drosophila homologue of hASF (dASF) lacks eight repeating arginine-serine dipeptides at its carboxyl-terminal region (RS domain), previously shown to be important for both localization and splicing activity of hASF. While this difference has no effect on dASF localization, it impedes its capacity to shuttle between the nucleus and cytoplasm and abolishes its phosphorylation by SR protein kinase 1 (SRPK1). dASF also has an altered splicing activity. While being competent for the regulation of 5' alternative splice site choice and activation of specific splicing enhancers, dASF fails to complement S100-cytoplasmic splicing-deficient extracts. Moreover, targeted overexpression of dASF in transgenic flies leads to higher deleterious developmental defects than hASF overexpression, supporting the notion that the distinctive structural features at the RS domain between the two proteins are likely to be functionally relevant in vivo.

Genes from Reference

Gene(s) Dmel\w
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