Alternative splicing of alpha-tropomyosin (alpha-TM) involves mutually exclusive selection of exons 2 and 3. Selection of exon 2 in smooth muscle (SM) cells is due to inhibition of exon 3, which requires both binding sites for polypyrimidine tract-binding protein as well as UGC (or CUG) repeat elements on both sides of exon 3. Point mutations or substitutions of the UGC-containing upstream regulatory element (URE) with other UGC elements disrupted the alpha-TM splicing pattern in transfected ...Expand abstract
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A splicing silencer that regulates smooth muscle specific alternative splicing is active in multiple cell types.
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