Genetic analysis of the enhancer of zeste locus and its role in gene regulation in Drosophila melanogaster - PubMed (original) (raw)

Genetic analysis of the enhancer of zeste locus and its role in gene regulation in Drosophila melanogaster

R S Jones et al. Genetics. 1990 Sep.

Abstract

The Enhancer of zeste [E(z)] locus of Drosophila melanogaster is implicated in multiple examples of gene regulation during development. First identified as dominant gain-of-function modifiers of the zeste1-white (z-w) interaction, mutant E(z) alleles also produce homeotic transformations. Reduction of E(z)+ activity leads to both suppression of the z-w interaction and ectopic expression of segment identity genes of the Antennapedia and bithorax gene complexes. This latter effect defines E(z) as a member of the Polycomb-group of genes. Analysis of E(z)S2, a temperature-sensitive E(z) allele, reveals that both maternally and zygotically produced E(z)+ activity is required to correctly regulate the segment identity genes during embryonic and imaginal development. As has been shown for other Polycomb-group genes, E(z)+ is required not to initiate the pattern of these genes, but rather to maintain their repressed state. We propose that the E(z) loss-of-function eye color and homeotic phenotypes may both be due to gene derepression, and that the E(z)+ product may be a general repressing factor required for both examples of negative gene regulation.

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References

    1. Mol Cell Biol. 1988 Feb;8(2):615-23 - PubMed
    1. Genetics. 1989 Sep;123(1):145-55 - PubMed
    1. Cell. 1987 Dec 4;51(5):721-32 - PubMed
    1. Genes Dev. 1987 Oct;1(8):868-79 - PubMed
    1. Genetica. 1968;39(3):497-507 - PubMed

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