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. 1995 Mar 14;92(6):1822–1825. doi: 10.1073/pnas.92.6.1822

Exon skipping by overexpression of a Drosophila heterogeneous nuclear ribonucleoprotein in vivo.

J Shen 1, K Zu 1, C L Cass 1, A L Beyer 1, J Hirsh 1
PMCID: PMC42374  PMID: 7892184

Abstract

Heterogeneous nuclear ribonucleoproteins (hnRNPs) are abundant RNA-binding proteins that are implicated in splicing regulation. Here we investigate the role of a Drosophila hnRNP in splicing regulation in living animals. We find that overexpression of the Drosophila hnRNP HRB98DE leads to skipping of all internal exons in the Drosophila dopa decarboxylase (Ddc) pre-mRNA in vivo. These results indicate that HRB98DE has a splicing activity that promotes use of terminal splice sites. The effect of excess HRB98DE on Ddc splicing is transient, even though high levels of HRB98DE persist for at least 24 hr. This suggests that Drosophila larvae can induce a compensating mechanism to counteract the effects of excess HRB98DE.

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