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A binding site for germ cell nuclear factor within c-mos regulatory sequences.

Alexandra Zilz·Geoffrey M Cooper
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Abstract

The proto-oncogene c-mos is specifically expressed in male and female germ cells. Previous studies have shown that the orphan nuclear receptor chicken ovalbumin upstream promoter transcription factor (COUP-TF) contributes to the repression of c-mos in somatic cells by binding to an inverted hexamer repeat within the c-mos regulatory region. In the present study, we demonstrate that another nuclear receptor superfamily member, germ cell nuclear factor (GCNF), binds to a sequence overlapping the c-mos COUP-TF binding site. Electrophoretic mobility shift assays with recombinant GCNF and both wild-type and mutant c-mos oligonucleotides demonstrated the binding of GCNF to an extended half site, CCAAGTTCA, which overlaps the first hexamer of the COUP-TF binding site. Transient transfection assays in NIH 3T3 cells further demonstrated that GCNF fused to a VP16 activation domain stimulated transcription from reporter constructs containing the c-mos GCNF binding site. Since GCNF is expressed in male and female germ cells at the same stages of development at which c-mos is transcribed, these results suggest that GCNF may serve as a regulator of c-mos transcription. Mol. Reprod. Dev. 67: 55-64, 2004.

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AnimalsBinding SitesCOUP Transcription FactorsChickensDNA-Binding ProteinsFemaleGene Expression RegulationGenes, ReporterGenes, mosMaleMiceNIH 3T3 CellsNuclear Receptor Subfamily 6, Group A, Member 1OligonucleotidesProtein BindingReceptors, Cytoplasmic and NuclearReceptors, SteroidRegulatory Sequences, Nucleic AcidTranscription FactorsTransfectionJournal ArticleResearch Support, U.S. Gov't, P.H.S.

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Alexandra Zilz, Geoffrey M Cooper. 2004. A binding site for germ cell nuclear factor within c-mos regulatory sequences.. https://doi.org/10.1002/mrd.20006

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