Developmental Expression of a Regulatory Gene is Programmed at the Level of Splicing

Overview

Journal EMBO J

Specialties Biotechnology
Molecular Biology

Date 1987 Dec 20

PMID 2832151

Citations 57

Authors

T B Chou

Z Zachar

P M Bingham

Affiliations

Soon will be listed here.

Abstract

We report sequence and transcript structures for a 6191-base chromosomal segment containing the presumptive regulatory gene from Drosophila, suppressor-of-white-apricot [su(wa)]. Our results indicate that su(wa) expression is controlled by regulating occurrence of specific splices. Seven introns are removed from the su(wa) primary transcript during precellular blastoderm development. The sequence of this mature RNA indicates that it is a conventional messenger RNA. In contrast, after cellular blastoderm the first two of these introns cease to be efficiently removed. The mature RNAs resulting from this failure to remove the first two introns have structures quite unexpected of mRNAs. We propose that postcellular blastoderm su(wa) expression is repressed by preventing splices necessary to produce a functional mRNA. Implications and mechanisms are discussed.

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