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Research Papers
Department of Biophysics, Faculty of Science, Kyoto University, Japan.
Using mouse immunoglobulin mu (IgM) pre-mRNA as the model substrate for in vitro splicing, we have explored the role of exon sequences in splicing. We have found that deletion of the 5' portion of exon M2 of the IgM gene abolishes the splicing of its immediately upstream intron. Splicing was restored when a purine-rich sequence found within the deleted region was reinserted into the deletion construct. This M2 exon sequence was able to stimulate the splicing of a heterologous intron of the Drosophila doublesex pre-mRNA that contains a suboptimal 3' splice site sequence. These results show that the IgM M2 exon sequence functions as a splicing enhancer. We found that the assembly of the early splicing complex is stimulated by the M2 exon sequence. In vitro competition experiments show that this stimulatory effect is mediated by the interaction of some trans-acting factors. Our results suggest that the U1 snRNP is one such factor. We propose that recognition of an enhancer exon sequence by the components of splicing machinery plays a vital role in the selection of splice sites, not only for the IgM pre-mRNA but for other pre-mRNAs. We designate such a sequence as exon recognition sequence (ERS).
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M. Ichida, Y. Hakamata, M. Hayakawa, E. Ueno, U. Ikeda, K. Shimada, T. Hamamoto, Y. Kagawa, and H. Endo Differential Regulation of Exonic Regulatory Elements for Muscle-specific Alternative Splicing during Myogenesis and Cardiogenesis J. Biol. Chem., May 19, 2000; 275(21): 15992 - 16001. [Abstract] [Full Text] [PDF] |
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K. Arima, A. Kowalska, M. Hasegawa, M. Mukoyama, R. Watanabe, M. Kawai, K. Takahashi, T. Iwatsubo, T. Tabira, and N. Sunohara Two brothers with frontotemporal dementia and parkinsonism with an N279K mutation of the tau gene Neurology, May 9, 2000; 54(9): 1787 - 1795. [Abstract] [Full Text] [PDF] |
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H.-X. Liu, S. L. Chew, L. Cartegni, M. Q. Zhang, and A. R. Krainer Exonic Splicing Enhancer Motif Recognized by Human SC35 under Splicing Conditions Mol. Cell. Biol., February 1, 2000; 20(3): 1063 - 1071. [Abstract] [Full Text] |
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L. A. Goldstein and W.-T. Chen Identification of an Alternatively Spliced Seprase mRNA That Encodes a Novel Intracellular Isoform J. Biol. Chem., January 28, 2000; 275(4): 2554 - 2559. [Abstract] [Full Text] [PDF] |
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C. L. Lorson and E. J. Androphy An exonic enhancer is required for inclusion of an essential exon in the SMA-determining gene SMN Hum. Mol. Genet., January 22, 2000; 9(2): 259 - 265. [Abstract] [Full Text] [PDF] |
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R. J. Kelm Jr., P. K. Elder, and M. J. Getz The Single-stranded DNA-binding Proteins, Puralpha , Purbeta , and MSY1 Specifically Interact with an Exon 3-derived Mouse Vascular Smooth Muscle alpha -Actin Messenger RNA Sequence J. Biol. Chem., December 31, 1999; 274(53): 38268 - 38275. [Abstract] [Full Text] [PDF] |
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S. Guth, C. Martinez, R. K. Gaur, and J. Valcarcel Evidence for Substrate-Specific Requirement of the Splicing Factor U2AF35 and for Its Function after Polypyrimidine Tract Recognition by U2AF65 Mol. Cell. Biol., December 1, 1999; 19(12): 8263 - 8271. [Abstract] [Full Text] [PDF] |
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C. F. Bourgeois, M. Popielarz, G. Hildwein, and J. Stevenin Identification of a Bidirectional Splicing Enhancer: Differential Involvement of SR Proteins in 5' or 3' Splice Site Activation Mol. Cell. Biol., November 1, 1999; 19(11): 7347 - 7356. [Abstract] [Full Text] [PDF] |
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J. Y. Seong, S. Park, and K. Kim Enhanced Splicing of the First Intron from the Gonadotropin-Releasing Hormone (GnRH) Primary Transcript Is a Prerequisite for Mature GnRH Messenger RNA: Presence of GnRH Neuron-Specific Splicing Factors Mol. Endocrinol., November 1, 1999; 13(11): 1882 - 1895. [Abstract] [Full Text] |
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B. A. Kuo and P. A. Norton Accurate selection of a 5' splice site requires sequences within fibronectin alternative exon B Nucleic Acids Res., October 1, 1999; 27(19): 3945 - 3952. [Abstract] [Full Text] [PDF] |
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S. L. Chew, H.-X. Liu, A. Mayeda, and A. R. Krainer Evidence for the function of an exonic splicing enhancer after the first catalytic step of pre-mRNA splicing PNAS, September 14, 1999; 96(19): 10655 - 10660. [Abstract] [Full Text] [PDF] |
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