Verification of the interaction between ASGPR and HBV preS1 protein / 西安交通大学学报(医学版)

Objective To verify the interaction between asialoglycoprotein receptor (ASGPR)and hepatitis B virus (HBV)preS1 protein in vivo and in vitro ,and identify ASGPR as a cell-surface receptor for HBV,which could elucidate the molecular mechanism of HBV infection.Methods The preS1-ASGPR interaction was examined in mammalian two-hybrid and coimmunoprecipitation system by strictly following the manufacturer’s instructions.Results ASGPR interacted specifically and directly with the preS1 domain of HBV in vivo and in vitro .Conclusion ASGPR may be a candidate receptor for HBV that mediates further step of HBV entry.

Screening of proteins interacting with the Hepatitis B Virus PreS1 protein from T7-Phage display library / 重庆医科大学学报

Objective:To screen and identify proteins that interact with the hepatitis B virus PreS1 protein by means of T7-phage display system. Method:Hepatitis B virus PreS1 protein was expressed by prokaryotic expression and used as selected molecule to biopan the T7 select human liver cDNA library,the selected positive clones were identified by DNA sequence and analyzed with BLAST program in GenBank. Result:After BLAST in all positive clones,one protein:Cytochrome c Oxidase Subunit I(COX1)was found to interact with the hepatitis B virus PreS1 protein. Conclusion:T7-phage display system is a convenient,rapid and effective method for screening interacting proteins. This results will provide important evidences for studying the pathogenesis and mechanism of HBV.

Cloning gene of hepatitis B virus PreS1 binding protein by phage display system / 解放军医学杂志

Objective T7 cDNA phage display system and bioinformatics methods were employed to find the binding protein to the PreS1 protein of hepatitis B virus (HBV). Methods PreS1 protein was coated in ELISA plate as the target protein, and then T7 cDNA library phage display system was used to scan the binding protein or peptide. A piece of cDNA was found to have the function to bind the PreS1 protein, and the product was named as PreS1 binding protein (PreS1BP). Using BLAST in GenBank, the amino acid sequence of PreS1BP was compared in the protein sequence database. Results The amino acid sequence of PreS1BP was identified as a piece of glioma tumor suppressor candidate region gene 2 (GLTSCR2), and the length of cDNA of PreS1BP was proved to be 1436 nt. The gene was located at chromosome 19q arm (19q13.3) with a length of 11445 base pair between 10403483 and 10414989, containing 13 exons and 12 introns. Conclusion HBV PreS1BP gene could be obtained by T7 cDNA phage display system in combination with bioinformatics methods.