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Mol Cell Biol April 1, 1994; 14 (4): 2786-97.
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FTZ-F1-related orphan receptors in Xenopus laevis: transcriptional regulators differentially expressed during early embryogenesis.

Ellinger-Ziegelbauer H , Hihi AK , Laudet V , Keller H , Wahli W , Dreyer C .

Orphan receptors of the FTZ-F1-related group of nuclear receptors (xFF1r) were identified in Xenopus laevis by isolation of cDNAs from a neurula stage library. Two cDNAs were found, which encode full length, highly related receptor proteins, xFF1rA and B, whose closet relative known so far is the murine LRH-1 orphan receptor. xFF1rA protein expressed by a recombinant vaccinia virus system specifically binds to FTZ-F1 response elements (FRE; PyCAAGGPyCPu). In cotransfection studies, xFF1rA constitutively activates transcription, in a manner dependent on the number of FREs. The amounts of at least four mRNAs encoding full-length receptors greatly increase between gastrula and early tailbud stages and decrease at later stages. At early tailbud stages, xFTZ-F1-related antigens are found in all nuclei of the embryo.

PubMed ID: 8139576
PMC ID: PMC358644
Article link: Mol Cell Biol

Species referenced: Xenopus laevis
Genes referenced: frzb nr5a2

References [+] :
Ayer, Activation and repression of Drosophila alcohol dehydrogenase distal transcription by two steroid hormone receptor superfamily members binding to a common response element. 1993, Pubmed