Expression of codon optimized HA5.1 gene with biofunctional activity in Pichia pastoris X33

Authors

  • Vo Viet Cuong VAST
  • Le Thi Hue VAST
  • Do Thi Huyen VAST
  • Le Quynh Giang VAST
  • Nguyen Thi Quy VAST
  • Truong Nam Hai VAST

DOI:

https://doi.org/10.15625/0866-7160/v35n2.3113

Keywords:

Codon Adaptation Index, avian influenza virus H5N1, P. pastoris X33, HA5.1 recombinant protein.

Abstract

Exotic gene expression in P. pastoris is dependent on multistep processes involving regulation at the level of transcription, protein translation, and posttranslational modifications. In order to further improve the expression level of HA recombinant protein from A/H5N1 avian virus we optimized the HA5.1 protein coding sequence and expressed it in P. pastoris X33. After optimizationCodon Adaptation Index (CAI) value was improved from 0.69 to 0.98, without modifying the amino acid sequence of the encoded protein. The synthetic mha5.1 with a length of 1 kb was inserted in to pPICZαmha5.1 and cloned in E. coli DH10b then integrated into P. pastoris X33. HA5.1 recombinant protein of 50-70 kDa was synthesized at 30oC under induction of 1% methanol during 72 hours. Recombinant protein had biological function to agglutinate chicken’s blood cells at maximum 26 dilutions and had antigenicity to bind with antibody against HA5 of virus H5N1. These important results are the basis for using recombinant HA5.1 protein as a subunit vaccine.

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Published

09-07-2013

How to Cite

Cuong, V. V., Hue, L. T., Huyen, D. T., Giang, L. Q., Quy, N. T., & Hai, T. N. (2013). Expression of codon optimized HA5.1 gene with biofunctional activity in Pichia pastoris X33. Academia Journal of Biology, 35(2), 255–264. https://doi.org/10.15625/0866-7160/v35n2.3113

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