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. 1992 Sep 11;20(17):4525–4531. doi: 10.1093/nar/20.17.4525

Ligand dependence of estrogen receptor induced changes in chromatin structure.

D M Gilbert 1, R Losson 1, P Chambon 1
PMCID: PMC334180  PMID: 1408752

Abstract

To determine whether the human estrogen receptor requires ligand to bind to its cognate estrogen receptor element (ERE) in vivo, we have examined the structure of chromatin at a chromosomally integrated ERE-URA3 reporter gene in yeast, and the influence of ligand bound and ligand free estrogen receptors on that structure. Using indirect end-labelling to map DNaseI and micrococcal nuclease sensitive sites, we found that receptor induced alterations in chromatin structure were completely dependent upon the presence of estradiol. These same alterations in chromatin structure were induced by a truncated estrogen receptor with both TAF-1 and TAF-2 transactivation functions deleted, suggesting that DNA binding per se disrupts chromatin structure. These results support models in which the estrogen receptor requires ligand to bind to the ERE in vivo.

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Selected References

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