Abstract:
:Although, as their names imply, estrogen receptors [ERs] and estrogen-related receptors [ERRs] are related transcription factors, their evolutionary relationships to each other are not fully understood. To elucidate the origins and evolution of ERs and ERRs, we searched for their orthologs in the recently sequenced genome of Trichoplax, the simplest known animal, and in the genomes of three lophotrochozoans: Capitella, an annelid worm, Helobdella robusta, a leech, and Lottia gigantea, a snail. BLAST searches found an ERR in Trichoplax, but no ER. BLAST searches also found ERRs in all three lophotrochozoans and invertebrate-like ERs in Capitella and Lottia, but not in Helobdella. Unexpectedly we find that the Capitella ER sequence is closest to ERbeta, unlike the other invertebrate ER sequences, which are closest to ERalpha. Our database searches and phylogenetic analysis indicate that invertebrate ERs evolved in a lophotrochozoan and steroid-binding ERs evolved in a deuterostome.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Baker MEdoi
10.1016/j.bbrc.2008.08.047subject
Has Abstractpub_date
2008-10-31 00:00:00pages
623-7issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(08)01597-0journal_volume
375pub_type
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