Human Ad4BP/SF-1 and its related nuclear receptor.
Ad4BP (or SF-1) is an essential transcriptional factor for steroidogenesis as well as for the development of the reproductive axis. We elucidated the structure of the human Ad4BP gene. The spliced variants of Ad4BP gene, ELP1 and ELP2 in mice, are unlikely to be present in humans since the analysis of the human gene revealed an in frame stop codon, 36-bp before the first ATG of Ad4BP. The promoter sequence of human Ad4BP, upstream of non-coding exon 1 was highly conserved, and E-box was also found to be essential for the transcription of human Ad4BP gene. During the process of the human Ad4BP gene cloning, we happened to obtain an Ad4BP-related gene, FTZ-F1beta which also belongs to the nuclear receptor family. We revealed cDNA structures of rat FTZ-F1beta, and found that rat has at least two types of FTZ-F1beta isoforms, which differ only by 21 amino acids length in the A/B domain. The tissue distributions of FTZ-F1beta in rat examined by RT-PCR, was found to be abundant in liver, pancreas, and gastrointestinal tracts. These results suggest that the physiological significance of FTZ-F1beta is different from that of Ad4BP.
Nawata
H
H
The Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Yanase
T
T
Oba
K
K
Ichino
I
I
Saito
M
M
Goto
K
K
Ikuyama
S
S
Sakai
H
H
Takayanagi
R
R
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D017931:DNA Primers; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D051717:Fushi Tarazu Transcription Factors; D018398:Homeodomain Proteins; D006801:Humans; D008969:Molecular Sequence Data; D018160:Receptors, Cytoplasmic and Nuclear / Q000378:metabolism*; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D054339:Steroidogenic Factor 1; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
D017931:DNA Primers; D004268:DNA-Binding Proteins; D051717:Fushi Tarazu Transcription Factors; D018398:Homeodomain Proteins; D018160:Receptors, Cytoplasmic and Nuclear; D054339:Steroidogenic Factor 1; D014157:Transcription Factors