PMID: 8612605Mar 1, 1996Paper

Motifs resembling hepatocyte nuclear factor 1 and activator protein 3 mediate the tissue specificity of the human plasminogen gene

European Journal of Biochemistry
G MeroniR Taramelli

Abstract

Plasminogen is one of the key elements in the fibrinolytic process. Like most of the gene products that participate in such reactions and which interact with plasminogen, the site of its synthesis is mainly confined to the hepatocyte. Plasminogen RNA has additionally been detected in kidney and very low amounts also in testes. Deletional analysis has indicated that two 5' sequences located within 2.5 kb of the first ATG are responsible for the transcriptional activation and the tissue specificity of the expression of the gene. By DNase protection and gel mobility shift assays with HepG2 nuclear extracts, the two sequences were localized and found to be the recognition sites for the widely known hepatocyte nuclear factor 1 (HNF-1) a trans-acting factor, and a nuclear factor like activator protein 3 (AP-3). The first one lies in a rather unusual position, i.e. within the 5'-untranslated region. The latter is located further upstream in a region between --2200 and --2100 from the plasminogen mRNA cap site. Moreover, site-directed mutagenesis coupled by functional experiments in HepG2 cells has demonstrated a synergism between these two positively acting elements in controlling the transcription of the human plasminogen gene.

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Citations

Oct 31, 2001·The British Journal of Surgery·J R Waller, M L Nicholson
Apr 6, 2005·BMC Immunology·Nives ZimmermannMarc E Rothenberg
Aug 1, 2007·Journal of Thrombosis and Haemostasis : JTH·A Gutiérrez-FernándezL A Miles
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Mar 17, 2020·The Journal of Clinical Investigation·Daxian WuLanjuan Li
Sep 13, 2006·Molecular Cancer Research : MCR·Silvia BorghiniIsabella Ceccherini

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