Analysis of proteins binding to the proximal promoter region of two rat serine protease inhibitor genes

• Published in: Nucleic acids research 1992-03, Vol.20 (5), p.1061-1068
• Main Authors: Rossi, Valerie, Francois Rouayrenc, Jean, Paquereau, Laurent, Joseé Vilarem, Marie, Le Cam, Alphonse
• Format: Article
• Language: English
• Subjects: Animals; Base Sequence; Binding Sites - genetics; Biological and medical sciences; CCAAT-Enhancer-Binding Proteins; DNA - metabolism; DNA-Binding Proteins - metabolism; Fundamental and applied biological sciences. Psychology; Gene Expression Regulation; Inflammation - genetics; Molecular and cellular biology; Molecular genetics; Molecular Sequence Data; Nuclear Proteins - metabolism; Promoter Regions, Genetic - genetics; Rats; Serine Proteinase Inhibitors - genetics; Temperature; Trans-Activators - metabolism; Transcription Factors - metabolism; Transcription. Transcription factor. Splicing. Rna processing
• ISSN: 0305-1048; 1362-4962
• DOI: 10.1093/nar/20.5.1061

The three serine protease Inhibitor (SPI) rat genes expressed preferentially In liver share considerable structural features and, nonetheless, are transcriptlonally regulated in completely different manners, more particularly after hypophysectomy or upon acute inflammation. DNase I footprinting and gel mobility shift analyses of the SPI 2.1 and 2.3 proximal promoter regions reveal the presence of three common protein binding sites (1 to 3, 3′ to 5′) located immediately upstream from the transcription start site. C/EBP, the liver-enriched factor, specifically interacts with site 1 whereas its related proteins (e.g; DBP, LAP/NFIL6) most likely recognize sites 2 and 3. Another ubiquitous unidentified factor also binds to site 2. A liver-specific protein dependent on growth hormone, whose binding is competed out by an ollgonucleotide reproducing an HNF3 motif, interacts exclusively with site 3. The 42 bp sequence which is found only within the SPI 2.3 promoter interacts with two ubiquitous factors, one of which is related to NFϰB. Acute inflammation does not significantly affect the protein binding patterns observed with the SPI 2.1 or 2.3 proximal promoter sequences. Our results show an apparent discrepancy between the large magnitude of in vivo changes In SPI gene transcription mediated by hormones and the small alterations detected In vitro, in the DNA-protein interactions on the promoters.