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Mol Cell Biol. 1988 February; 8(2): 615-623

DNA-binding properties of the Drosophila melanogaster zeste gene product.

A Mansukhani, A Crickmore, P W Sherwood and M L Goldberg

Section of Genetics and Development, Cornell University, Ithaca, New York 14853.

ABSTRACT

The ability of the zeste moiety of beta-galactosidase-zeste fusion proteins synthesized in Escherichia coli to bind specific DNA sequences was examined. Such fusion proteins recognize a region of the white locus upstream of the start of transcription; this region has previously been shown to be required for genetic interaction between the zeste and white loci. Another strong binding site was localized to a region between 50 and 205 nucleotides before the start of the Ubx transcriptional unit; expression of the bithorax complex is also known to be influenced by the zeste locus. Weaker binding sites were also seen in the vicinity of the bxd and Sgs-4 genes, but it is currently unclear whether these binding sites play a role in transvection effects. The DNA-binding activity of the zeste protein is restricted to a domain of approximately 90 amino acids near the N terminus. This domain does not appear to contain homeobox or zinc finger motifs found in other DNA-binding proteins. The DNA-binding domain is not disrupted by any currently characterized zeste mutations.

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Mol Cell Biol. 1988 February; 8(2): 615-623

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