Medaka (Oryzias latipes) FTZ-F1 potentially regulates the transcription of P-450 aromatase in ovarian follicles: cDNA cloning and functional characterization.
Our previous findings suggest the activity of cytochrome P-450 aromatase (P-450arom), the enzyme which converts testosterone to estradiol-17beta, in the ovarian follicle of medaka (Oryzias latipes) is regulated at the transcriptional level. In this study, we cloned a cDNA encoding a FTZ-F1-like protein (mdFtz-F1) from ovarian follicles of medaka. In vitro translated mdFTZ-F1, and nuclear extract from medaka ovarian follicles, formed complexes with oligonucleotide probes containing putative orphan nuclear receptor binding motifs, which are present in the promoter region of the medaka P-450arom gene. The expression pattern of mdFtz-F1 transcripts during oogenesis coincides with that of P-450arom transcripts. Transfection assays further suggest a potential transcriptional regulatory activity of mdFTZ-F1 upon the medaka P-450arom promoter. Taken together, these results suggest a potential role of mdFTZ-F1 in the transcriptional regulation of P-450arom in the ovarian follicle of medaka.
Watanabe
M
M
Department of Molecular Biomechanics, School of Life Science, The Graduate University for Advanced Studies, Okazaki, Japan.
Tanaka
M
M
Kobayashi
D
D
Yoshiura
Y
Y
Oba
Y
Y
Nagahama
Y
Y
D000595:Amino Acid Sequence; D000818:Animals; D001141:Aromatase / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular; D017931:DNA Primers / Q000235:genetics; D018076:DNA, Complementary / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism*; D005260:Female; D051717:Fushi Tarazu Transcription Factors; D015971:Gene Expression Regulation, Enzymologic; D018398:Homeodomain Proteins; D066298:In Vitro Techniques; D008969:Molecular Sequence Data; D009866:Oogenesis; D009990:Oryzias; D006080:Ovarian Follicle / Q000201:enzymology / Q000378:metabolism*; D011401:Promoter Regions, Genetic; D018160:Receptors, Cytoplasmic and Nuclear; D017386:Sequence Homology, Amino Acid; D054339:Steroidogenic Factor 1; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism*
D017931:DNA Primers; D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D051717:Fushi Tarazu Transcription Factors; D018398:Homeodomain Proteins; D018160:Receptors, Cytoplasmic and Nuclear; D054339:Steroidogenic Factor 1; D014157:Transcription Factors; D001141:Aromatase