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Research Papers
Howard Hughes Medical Institute, Department of Cardiology, Children's Hospital, Boston, Massachusetts.
Abstract
alpha-Tropomyosin exons 2 and 3 are spliced in a mutually exclusive manner. Exon 3 is included as the default exon in the mRNA of most cell types, whereas exon 2 is only included in the mRNA of smooth muscle cells. The primary determinant for the default selection of exon 3 is the branchpoint/polypyrimidine tract. This element upstream of exon 3 clearly and effectively outcompetes the corresponding element upstream of exon 2. To identify trans-acting factors that bind to this important cis element, we used UV cross-linking to identify a 57-kD protein whose binding characteristics directly correlate with 3'-splice-site selection in cis-competition splicing assays. This protein appears to be identical to polypyrimidine tract-binding protein. In this report we have used oligonucleotides derived from peptide sequences to isolate and sequence cDNA clones encoding this 57.2-kD protein. The primary sequence reveals a novel protein with significant homology to other RNA-binding proteins. Expression of the mRNA is detected in all tissues and cells examined, although its levels exhibit tissue-specific and developmental regulation. Using a biochemical complementation assay, we have found that this protein, along with a 100-kD protein, exists as part of a large complex that is required to rescue splicing from depleted nuclear extracts.
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J. Wang, Z. Dong, and L. R. Bell Sex-lethal Interactions with Protein and RNA. ROLES OF GLYCINE-RICH AND RNA BINDING DOMAINS J. Biol. Chem., August 29, 1997; 272(35): 22227 - 22235. [Abstract] [Full Text] [PDF] |
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S. Huang, T. J. Deerinck, M. H. Ellisman, and D. L. Spector The Dynamic Organization of the Perinucleolar Compartment in the Cell Nucleus J. Cell Biol., June 2, 1997; 137(5): 965 - 974. [Abstract] [Full Text] [PDF] |
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D. E. Schultz, C. C. Hardin, and S. M. Lemon Specific Interaction of Glyceraldehyde 3-Phosphate Dehydrogenase with the 5'-Nontranslated RNA of Hepatitis A Virus J. Biol. Chem., June 14, 1996; 271(24): 14134 - 14142. [Abstract] [Full Text] [PDF] |
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H Min, R C Chan, and D L Black The generally expressed hnRNP F is involved in a neural-specific pre-mRNA splicing event. Genes & Dev., November 1, 1995; 9(21): 2659 - 2671. [Abstract] [PDF] |
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X Liu and J E Mertz HnRNP L binds a cis-acting RNA sequence element that enables intron-dependent gene expression. Genes & Dev., July 15, 1995; 9(14): 1766 - 1780. [Abstract] [PDF] |
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R Singh, J Valcarcel, and M. Green Distinct binding specificities and functions of higher eukaryotic polypyrimidine tract-binding proteins Science, May 26, 1995; 268(5214): 1173 - 1176. [Abstract] [PDF] |
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I Solovei, H Macgregor, and E Gaginskaya Single stranded nucleic acid binding structures on chicken lampbrush chromosomes J. Cell Sci., January 4, 1995; 108(4): 1391 - 1396. [Abstract] [PDF] |
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M Tian and T Maniatis A splicing enhancer exhibits both constitutive and regulated activities. Genes & Dev., July 15, 1994; 8(14): 1703 - 1712. [Abstract] [PDF] |
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C W Siebel, R Kanaar, and D C Rio Regulation of tissue-specific P-element pre-mRNA splicing requires the RNA-binding protein PSI. Genes & Dev., July 15, 1994; 8(14): 1713 - 1725. [Abstract] [PDF] |
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D. Bregman, L Du, Y Li, S Ribisi, and S. Warren Cytostellin distributes to nuclear regions enriched with splicing factors J. Cell Sci., January 3, 1994; 107(3): 387 - 396. [Abstract] [PDF] |
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P. Norton Alternative pre-mRNA splicing: factors involved in splice site selection J. Cell Sci., January 1, 1994; 107(1): 1 - 7. [PDF] |
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