Bacterial expression, purification, and in vitro N-myristoylation of fusion hepatitis B virus preS1 with the native-type N-terminus

• Published in: Protein expression and purification 2003, Vol.27 (1), p.49-54
• Main Authors: Ma, Han-Hui, Yang, Li, Yang, Xin-Ying, Xu, Zheng-Ping, Li, Bo-Liang
• Format: Article
• Language: English
• Subjects: Acyltransferases - metabolism; Amino Acid Sequence; Base Sequence; Chromatography, Affinity; Electrophoresis, Polyacrylamide Gel; Escherichia coli - genetics; Gene Expression; Hepatitis B Surface Antigens - chemistry; Hepatitis B Surface Antigens - genetics; Hepatitis B Surface Antigens - isolation & purification; Hepatitis B Surface Antigens - metabolism; Hepatitis B virus - genetics; Histidine; Humans; Molecular Sequence Data; Mutation - genetics; Myristic Acid - metabolism; Protein Precursors - chemistry; Protein Precursors - genetics; Protein Precursors - isolation & purification; Protein Precursors - metabolism; Recombinant Fusion Proteins - chemistry; Recombinant Fusion Proteins - genetics; Recombinant Fusion Proteins - isolation & purification; Recombinant Fusion Proteins - metabolism
• ISSN: 1046-5928; 1096-0279
• DOI: 10.1016/S1046-5928(02)00541-7

Very low-level expression of hepatitis B virus (HBV) preS1 with the native-type N-terminus hampered the biochemical and functional studies on its myristoylation. In the present study, the fusion HBV preS1 with the native-type N-terminus and a His6-Tag fused to C-terminus (HBV preS1-HT) was highly expressed in Escherichia coli. This was due to an introduced mutation of the rare codon GGA found in the HBV preS1 to the codon preferred by E. coli, GGU. The protein was rapidly purified from bacterial lysate by Ni-IDA affinity chromatography. The experimental assays using 3H-labeled substrate demonstrate that the purified HBV preS1-HT can be effectively N-myristoylated by recombinant human protein N-myristoyltransferase (NMT) in vitro.