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Mol Cell Biol. 1994 January; 14(1): 567-575

Alternative 5' splice site selection induced by heat shock.

H Takechi, N Hosokawa, K Hirayoshi and K Nagata

Department of Cell Biology, Faculty of Medicine, Kyoto University, Japan.

ABSTRACT

The mouse HSP47 gene consists of six exons separated by five introns. Three HSP47 cDNAs differing only in their 5' noncoding regions have been reported. One of these alternatively spliced mRNAs was detected only after heat shock, which caused an alternative 5' splice donor site selection. Other stress inducers, including an amino acid analog and sodium arsenite, had no effect on the alternative splicing. The alternatively spliced mRNA, which was 169 nucleotides longer in the 5' noncoding region compared to mRNA transcribed in non-heat shock conditions, was efficiently translated under heat shock conditions. This novel finding that alternative splicing is caused by artificial treatment like heat shock will provide a useful in vivo model for understanding the exon-intron recognition mechanism as well as heat shock-induced alterations in gene expression.

Mol Cell Biol. 1994 January; 14(1): 567-575




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