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  • Title: Genomic organization of the human retinoic acid receptor beta 2.
    Author: van der Leede BJ, Folkers GE, Kruyt FA, van der Saag PT.
    Journal: Biochem Biophys Res Commun; 1992 Oct 30; 188(2):695-702. PubMed ID: 1332705.
    Abstract:
    Recently three isoforms of the mouse retinoic acid receptor (mRAR beta 1, mRAR beta 2, mRAR beta 3) have been described, generated from the same gene (Zelent et al., 1991). The isoforms differ in their 5'-untranslated (5'-UTR) and A region, but have identical B to F regions. The N-terminal variability of mRAR beta 1/beta 3 is encoded in the first two exons (E1 and E2), while exon E3 includes N-terminal sequences of the mRAR beta 2 isoform. We have determined the structure of the human RAR beta 2 gene, using a genomic library from K562 cells. The open reading frame is split into eight exons: E3 contains sequences for the N-terminal A region and E4 to E10 encode the common part of the receptor, including the DNA-binding domain and ligand-binding domain. Corresponding to other nuclear receptors, both 'zinc-fingers' of the DNA-binding domain are encoded separately in two exons and the ligand-binding domain is assembled from five exons.
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