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
Genomicsjournal_title
Genomicsauthors
O'Reilly D,Addley M,Quinn C,MacFarlane AJ,Gordon S,McKnight AJ,Greaves DRdoi
10.1016/j.ygeno.2004.08.016subject
Has Abstractpub_date
2004-12-01 00:00:00pages
1030-40issue
6eissn
0888-7543issn
1089-8646pii
S0888-7543(04)00247-2journal_volume
84pub_type
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