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Mol Cell Biol. 1988 March; 8(3): 1160-1168

Genomic organization and sequence of the Gus-s alpha allele of the murine beta-glucuronidase gene.

Population Council, New York, New York.

ABSTRACT

The Gus-s alpha allele of the mouse beta-glucuronidase gene exhibits a high degree of inducibility by androgens due to its linkage with the Gus-r alpha regulatory locus. We isolated Gus-s alpha on a 28-kilobase pair fragment of mouse chromosome 5 and found that it contains 12 exons and 11 intervening sequences spanning 14 kilobase pairs of this genomic segment. The mRNA cap site was identified by ribonuclease protection and primer extension analyses which revealed an unusually short 5' noncoding sequence of 12 nucleotides. Proximal regulatory sequences in the 5'-flanking DNA and the complete sequence of the Gus-s alpha mRNA transcript were also determined. Comparison of the amino acid sequence determined from the Gus-s alpha nucleotide sequence with that of human beta-glucuronidase indicated that the two human mRNA species differ due to alternate splicing of an exon homologous to exon 6 of the mouse gene.