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Mol Cell Biol. 1987 November; 7(11): 4010-4016

Yeast pre-mRNA splicing requires a minimum distance between the 5' splice site and the internal branch acceptor site.

Laboratorium für Molekulare Biologie, Ludwig-Maximilians-Universität München, Martinsried, Federal Republic of Germany.

ABSTRACT

We have generated several deletions within the intron of a yeast actin gene construct which have lead to different splicing efficiencies as measured by Northern blot (RNA blot) and primer extension analyses. Our data especially demonstrate that a minimum distance from the 5' splice site to the internal branch acceptor site is required for accurate and efficient splicing. In a construct in which splicing was completely abolished, splicing could be restored by expanding the distance from the 5' splice site to the internal branch acceptor site with heterologous sequences. Alternative splicing, i.e., exon skipping and the use of a cryptic 5' splice site, was observed when the mRNA precursor was derived from a tandem repeat of a truncated intron with flanking exon sequences.

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