Combining with estrogen and transmitting the signal within the cell to trigger a change in cell activity or function. [ http://www.ncbi.nlm.nih.gov/pubmed/17615392 GOC:signaling ]
Term information
For estrogen receptors that function within the nucleus to modulate transcription, consider instead annotating to the child terms 'estrogen-activated sequence-specific DNA binding RNA polymerase II transcription factor activity ; GO:0038052' or 'estrogen-activated RNA polymerase II transcription factor binding transcription factor activity ; GO:0038053'.