Characterization of the polycomb group response elements of the Drosophila melanogaster invected Locus.

Molecular and Cellular Biology
Melissa D CunninghamJ A Kassis

Abstract

The Polycomb group proteins (PcGs) play a vital role throughout development by maintaining precise gene expression patterns. In Drosophila melanogaster, PcG-mediated gene silencing is achieved through DNA elements called Polycomb response elements (PREs); however, the mechanism for establishing silencing and the requirements and composition of a working PRE are not fully understood. We have used the computer program jPREdictor to uncover PREs located within the invected (inv) locus. The functionalities of these predicted PREs were tested in two different assays: one analyzing their abilities to maintain expression of a beta-galactosidase reporter gene and the other evaluating their abilities to establish pairing-sensitive silencing of the mini-white reporter in the vector pCaSpeR. We have identified two previously uncharacterized PREs at the inv gene and demonstrate that they produce similar results in the two assays. Our results indicate that clusters of protein binding sites do not accurately predict PREs and provide new insight into the DNA sequence requirements for the binding of the PcG protein Pho. Finally, our data show that PREs and regulatory DNA from different genes can function together to establish PcG-mediated sile...Continue Reading

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Citations

Mar 15, 2012·Nucleic Acids Research·Jia ZengJianpeng Ma
Mar 24, 2017·Molecular Genetics and Genomics : MGG·Juan M Calvo-MartínCarmen Segarra
Jan 4, 2018·ELife·Kirsty JamiesonEric U Selker
Oct 31, 2013·G3 : Genes - Genomes - Genetics·Jumana AlHaj AbedRichard S Jones
Aug 6, 2017·Genetics·Judith A KassisJohn W Tamkun

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