作者: Atsuhisa Ueda , Teizo Yoshimura
关键词: Molecular biology 、 Messenger RNA 、 Transcription (biology) 、 Electrophoretic mobility shift assay 、 Promoter 、 Base pair 、 Biology 、 CAAT box 、 Gene 、 Cell type 、 Cell biology 、 Biochemistry
摘要: To analyze the promotor region of human macrophage-stimulating protein (MSP) gene, 5′-flanking this gene was cloned. The major initiation site determined at T located 49 base pairs upstream translation by primer extention with mRNA from HepG2 and Hep3B cells. There no TATA sequence in region. Transient transfection assay 5′-deletion constructs showed that transcription regulated positive negative regulatory elements (PRE NRE). PRE (−34 to +2) essential for maximal NRE (−141 −34) appeared be responsible tissue-specific expression gene. contained CCAAT a mutation CTGAT resulted significant loss transcriptional activity. Electrophoretic mobility shift suggested two different proteins bound (MSP-PRE-binding protein-1 (MSP-PREB1) 2). MSP-PREB1 2 were detected various cell types, involved these bindings. These findings indicate are regulators. Further characterization also revealed MSP-PREB2 identical binding factor, known as NF-Y.