| Autor: |
Sean W Fanning, Christopher G Mayne, Venkatasubramanian Dharmarajan, Kathryn E Carlson, Teresa A Martin, Scott J Novick, Weiyi Toy, Bradley Green, Srinivas Panchamukhi, Benita S Katzenellenbogen, Emad Tajkhorshid, Patrick R Griffin, Yang Shen, Sarat Chandarlapaty, John A Katzenellenbogen, Geoffrey L Greene |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
eLife, Vol 5 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
2050-084X |
| DOI: |
10.7554/eLife.12792 |
| Popis: |
Somatic mutations in the estrogen receptor alpha (ERα) gene (ESR1), especially Y537S and D538G, have been linked to acquired resistance to endocrine therapies. Cell-based studies demonstrated that these mutants confer ERα constitutive activity and antiestrogen resistance and suggest that ligand-binding domain dysfunction leads to endocrine therapy resistance. Here, we integrate biophysical and structural biology data to reveal how these mutations lead to a constitutively active and antiestrogen-resistant ERα. We show that these mutant ERs recruit coactivator in the absence of hormone while their affinities for estrogen agonist (estradiol) and antagonist (4-hydroxytamoxifen) are reduced. Further, they confer antiestrogen resistance by altering the conformational dynamics of the loop connecting Helix 11 and Helix 12 in the ligand-binding domain of ERα, which leads to a stabilized agonist state and an altered antagonist state that resists inhibition. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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