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      [Screening of binding proteins to interferon-alpha promoter DNA by phage display technique].

      Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology
      DNA, Complementary, genetics, DNA-Binding Proteins, biosynthesis, Gene Library, Hepatocytes, cytology, metabolism, Humans, Interferon-alpha, Promoter Regions, Genetic, Two-Hybrid System Techniques

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          Abstract

          To investigate the interferon alpha regulation mechanisms by screening binding proteins of interferon alpha promoter by phage display. PCR product of interferon-alpha promoter was incubated with a phage display cDNA library that expressed a library of human liver proteins on the surface of bacteriophage T7. Unbound phages were washed off and the phages bound to the interferon alpha promoter were amplified. Positive plaques were amplified by PCR and cloned into a pGEM-Teasy vector in order to perform DNA sequence analysis and subsequent computer blasting analysis. Positive phage-displayed proteins binding with interferon alpha promoter were enriched after five rounds of biopanning. We found that the following proteins were relevant to interferon alpha: mitochondrial ribosomal protein, chromosome clone, fibrinogen A alpha polypeptide, enoyl coenzyme A hydratase short chain, eukaryotic translation elongation factor 1 alpha, PI-3-kinase-related kinase SMG-1-like, xeroderma pigmentosum C group, and Homo sapien activity-dependent neuroprotector (ADNP). Many proteins with different functions could bind with interferon alpha promoter.

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