RRM but not the Asp/Glu domain of hnRNP C1/C2 is required for splicing regulation of Ron exon 11 pre-mRNA
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초록
The Ron proto-oncogene is a human receptor for macrophage-stimulating protein (MSP). The exclusion of exon 11 in alternative splicing generates RON protein that is constitutively activated. Heterogenous ribonucleaoprotein (hnRNP) C1/C2 is one of the most abundant proteins in cells. In this manuscript, we showed that both hnRNP C1 and C2 promoted exon 11 inclusion of Ron pre-mRNA and that hnRNP C1 and hnRNP C2 functioned independently but not cooperatively. Moreover, hnRNP C1 stimulated exon 11 splicing through intron 10 activation but not through intron 11 splicing. Furthermore, we showed that, whereas the RRM domain was required for hnRNP C1 function, the Asp/Glu domain was not. In conclusion, hnRNP C1/C2 promoted exon 11 splicing independently by stimulating intron 10 splicing through RRM but not through the Asp/Glu domain.
Abstract
The Ron proto-oncogene is a human receptor for macrophage-stimulating protein (MSP). The exclusion of exon 11 in alternative splicing generates RON protein that is constitutively activated. Heterogenous ribonucleaoprotein (hnRNP) C1/C2 is one of the most abundant proteins in cells. In this manuscript, we showed that both hnRNP C1 and C2 promoted exon 11 inclusion of Ron pre-mRNA and that hnRNP C1 and hnRNP C2 functioned independently but not cooperatively. Moreover, hnRNP C1 stimulated exon 11 splicing through intron 10 activation but not through intron 11 splicing. Furthermore, we showed that, whereas the RRM domain was required for hnRNP C1 function, the Asp/Glu domain was not. In conclusion, hnRNP C1/C2 promoted exon 11 splicing independently by stimulating intron 10 splicing through RRM but not through the Asp/Glu domain.
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