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Secreted Expression and Purification of Dengue 2 Virus Full-length Nonstructural Glycoprotein NS1 in Pichia. pastoris

Abstract

The dengue 2 virus (DEN-2) RNA (NGC strain) was used as a substrate to produce DNA clones of the full-length NS1 genes via reverse transcriptase synthesis of cDNA followed by polymerase chain reaction amplification of the NS1 region. Products were cloned into pPICZαB vector for sequencing and into Pichia pastoris for expression. A recombinant protein with a molecular size of approximately 80 KDa was secreted into the supernatant from the yeast cells when induced with methanol. The expressed protein was able to bind with mouse polyclonal antibody or NS1-specific monoclonal antibody of dengue 2 virus. Purified NS1-poly(His)-tagged fusion protein was obtained from the expressed product by passing through a metal-chelating affinity chromatographic (MCAC) column. The study also verified that our purified rNS1 protein retained its antigenicity. High-level production of the rNS1 protein up to 70 mg/l indicates that P. pastoris is an efficient expression system for dengue virus full-length NS1 glycoprotein.

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Correspondence to Li-fang Jiang.

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Zhou, J., Tang, Y., Fang, D. et al. Secreted Expression and Purification of Dengue 2 Virus Full-length Nonstructural Glycoprotein NS1 in Pichia. pastoris . Virus Genes 33, 27–32 (2006). https://doi.org/10.1007/s11262-005-0036-6

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Keywords

  • Dengue virus
  • NS1 protein
  • Pichia pastoris
  • Expression