Functional analysis of the murine Emr1 promoter identifies a novel purine-rich regulatory motif required for high-level gene expression in macrophages.

Abstract:

:This study has investigated the transcriptional regulation of the Emr1 gene in murine macrophages and defined an enhancer element within the proximal promoter that is necessary for Emr1 expression in myeloid cells. This element consists of an extended purine-rich sequence (PuRS) of 83 consecutive purine residues containing 9 GGAA sequences, the core binding sequence for members of the Ets family of transcription factors. The Ets factor PU.1 associates with this PuRS element both in vitro and in vivo. Using a standard BLAST search we identified similar PuRS elements in other myeloid and nonmyeloid genes. All PuRS elements tested confer enhancer activity onto a heterologous promoter and chromatin immunoprecipitation experiments revealed that PU.1 associates in vivo with the PuRS elements from the genes expressed in myeloid cells. Our results provide evidence that extended purine-rich sequence elements may constitute a new transcription regulatory motif and that PU.1 association is a prerequisite for macrophage-specific expression.

journal_name

Genomics

journal_title

Genomics

authors

O'Reilly D,Addley M,Quinn C,MacFarlane AJ,Gordon S,McKnight AJ,Greaves DR

doi

10.1016/j.ygeno.2004.08.016

subject

Has Abstract

pub_date

2004-12-01 00:00:00

pages

1030-40

issue

6

eissn

0888-7543

issn

1089-8646

pii

S0888-7543(04)00247-2

journal_volume

84

pub_type

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