Evidence map›Paper›PMID 21410956›Full record

ArticleEpigenetics & chromatin2011

Quantitative analysis of polycomb response elements (PREs) at identical genomic locations distinguishes contributions of PRE sequence and genomic environment.

Helena Okulski, Birgit Druck, Sheetal Bhalerao, Leonie Ringrose

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Article in Epigenetics & chromatin, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
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30citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

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3 · Its place in the literature

Who cites it

30 citing papers in PubMed.

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  16. Sex combs reduced (Scr) regulatory region of Drosophila revisited.Molecular genetics and genomics : MGG · 2017
    Article
  17. Review
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  19. Dual functionality ofGenes & development · 2017
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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Helena OkulskiIMBA, Institute of Molecular Biotechnology GmBH, Dr, Bohr-Gasse 3, 1030 Vienna, Austria. Leonie.Ringrose@imba.oeaw.ac.at.
Birgit Druck
Sheetal Bhalerao
Leonie Ringrose

Funding

Austrian Science Fund FWF P 21525
6 · The paper itself

Abstract

backgroundPolycomb/Trithorax response elements (PREs) are cis-regulatory elements essential for the regulation of several hundred developmentally important genes. However, the precise sequence requirements for PRE function are not fully understood, and it is also unclear whether these elements all function in a similar manner. Drosophila PRE reporter assays typically rely on random integration by P-element insertion, but PREs are extremely sensitive to genomic position.

resultsWe adapted the ΦC31 site-specific integration tool to enable systematic quantitative comparison of PREs and sequence variants at identical genomic locations. In this adaptation, a miniwhite (mw) reporter in combination with eye-pigment analysis gives a quantitative readout of PRE function. We compared the Hox PRE Frontabdominal-7 (Fab-7) with a PRE from the vestigial (vg) gene at four landing sites. The analysis revealed that the Fab-7 and vg PREs have fundamentally different properties, both in terms of their interaction with the genomic environment at each site and their inherent silencing abilities. Furthermore, we used the ΦC31 tool to examine the effect of deletions and mutations in the vg PRE, identifying a 106 bp region containing a previously predicted motif (GTGT) that is essential for silencing.

conclusionsThis analysis showed that different PREs have quantifiably different properties, and that changes in as few as four base pairs have profound effects on PRE function, thus illustrating the power and sensitivity of ΦC31 site-specific integration as a tool for the rapid and quantitative dissection of elements of PRE design.

Identifiers

PMID21410956
PMCPMC3070613

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