Science. 1994 Sep 16;265(5179):1706-9.

Regulation of alternative splicing in vivo by overexpression of antagonistic splicing factors.

Cáceres JF, Stamm S, Helfman DM, Krainer AR.

Source

Cold Spring Harbor Laboratory, NY 11724.

Abstract

The opposing effects of SF2/ASF and heterogeneous nuclear ribonucleoprotein (hnRNP) A1 influence alternative splicing in vitro. SF2/ASF or hnRNP A1 complementary DNAs were transiently overexpressed in HeLa cells, and the effect on alternative splicing of several cotransfected reporter genes was measured. Increased expression of SF2/ASF activated proximal 5' splice sites, promoted inclusion of a neuron-specific exon, and prevented abnormal exon skipping. Increased expression of hnRNP A1 activated distal 5' splice sites. Therefore, variations in the intracellular levels of antagonistic splicing factors influence different modes of alternative splicing in vivo and may be a natural mechanism for tissue-specific or developmental regulation of gene expression.

PMID:: 8085156; [PubMed - indexed for MEDLINE]

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