The regulation of the Oct-1 gene transcription is mediated by two promoters.
The ubiquitous transcription factor Oct-1 is a member of the POU domain family of regulatory proteins. Target genes controlled by Oct-1 include housekeeping genes, e.g. the genes encoding histon H2B or snRNAs, as well as tissue-specific genes, e.g. the genes encoding the light and heavy chains of immunoglobulines, some interleukins, and others. Oct-1 pre-mRNA may be spliced in several ways, resulting in production of several protein isoforms that may differ functionally. The 5'-end of the Oct-1 gene contains two exons-exon 1U and exon 1L that alternatively present in Oct-1 mRNA. We studied regulation of transcription of the Oct-1 gene using reporter gene assays of promoter-luciferase gene-constructs. It was shown that transcription of the Oct-1 gene is regulated by two promoters located upstream of the exon 1U and upstream of the exon 1L. The promoter located upstream of the exon 1U contains G/C-rich sequences and multiple Sp1 sites, while the promoter located upstream of the exon 1L contains A/T-rich motifs and autoregulation-related cis-elements: two octamer sites ATGCAAAT, two octamer related sites and multiple TAAT-core sites. Exons 1U and 1L in the human OTF-1 locus encoding the Oct-1 gene are located at the distance of 108 kbp. In the murine locus otf-1 the distance between exons 1U and 1L is 67 kbp. We suggest that the two promoters can differ functionally.
Pankratova
Elizaveta V
EV
Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str., 32, Moscow, 119991, Russia. pank@eimb.relarn.ru
Sytina
Elena V
EV
Luchina
Nadejda N
NN
Krivega
Ivan V
IV
D024506:5' Flanking Region; D000818:Animals; D001482:Base Composition; D002460:Cell Line; D003001:Cloning, Molecular; D004268:DNA-Binding Proteins / Q000235:genetics*; D005091:Exons; D005786:Gene Expression Regulation; D051863:Host Cell Factor C1; D006801:Humans; D008214:Lymphocytes / Q000502:physiology; D051379:Mice; D050811:Octamer Transcription Factor-1; D011401:Promoter Regions, Genetic; D014157:Transcription Factors / Q000235:genetics*; D014158:Transcription, Genetic
D004268:DNA-Binding Proteins; C497692:HCFC1 protein, human; C497693:Hcfc1 protein, mouse; D051863:Host Cell Factor C1; D050811:Octamer Transcription Factor-1; C494165:POU2F1 protein, human; C494166:Pou2f1 protein, mouse; D014157:Transcription Factors