Two erbA homologs encoding proteins with different T3 binding capacities are transcribed from opposite DNA strands of the same genetic locus

Nobuyuki Miyajima, Ryuya Horiuchi, Yukiko Shibuya, Shin ichi Fukushige, Ken ichi Matsubara, Kumao Toyoshima, Tadashi Yamamoto

Research output: Contribution to journalArticlepeer-review

193 Citations (Scopus)

Abstract

Two erbA homologs, termed ear-1 and ear-7, are present in the human genome on chromosome 17. The two genes reside in the same genetic locus with overlapping exons and are transcribed from opposite DNA strands. In addition, the ear-7 mRNA is alternatively spliced to generate two protein isoforms, namely the ear71 and ear72 proteins. Nucleotide sequence analysis predicts that the ear71 protein is a human counterpart of the chicken c-erbA protein, a molecule closely related or identical to thyroid hormone receptor. Indeed, Scatchard analysis of proteins synthesized in vitro indicated very high affinity binding of T3 to the ear71 protein but not to the ear72 protein. Interestingly, the ear-1 gene product showed low, but appreciable, binding to T3, although its authentic ligand remains to be clarified.

Original languageEnglish
Pages (from-to)31-39
Number of pages9
JournalCell
Volume57
Issue number1
DOIs
Publication statusPublished - 1989 Apr 7
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Fingerprint Dive into the research topics of 'Two erbA homologs encoding proteins with different T<sub>3</sub> binding capacities are transcribed from opposite DNA strands of the same genetic locus'. Together they form a unique fingerprint.

Cite this