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Expression and characterization of soluble human parainfluenza virus type 1 hemagglutinin-neuraminidase glycoprotein

Z M Wang1, L L Tong, D Grant

  • 1Gilead Sciences, Inc., 333 Lakeside Drive, Foster City, CA 94404, USA. michael_wang@gilead.com

Journal of Virological Methods
|September 7, 2001
PubMed

Insights

Researchers developed a method to produce and purify human parainfluenza virus type 1 hemagglutinin-neuraminidase (hPIV-1 HN) for antiviral drug discovery. This soluble protein retains native enzymatic activity, aiding further biochemical studies.

Area of Science:

  • Virology
  • Biochemistry
  • Structural Biology

Background:

  • Human parainfluenza virus types 1, 2, and 3 are significant respiratory pathogens.
  • No specific antiviral treatments are currently available for these infections.
  • The hemagglutinin-neuraminidase (HN) glycoprotein is a potential target for antiviral therapies.

Purpose of the Study:

  • To characterize the biochemical functions of the hPIV-1 HN glycoprotein.
  • To establish an expression and purification system for soluble hPIV-1 HN.
  • To obtain material suitable for X-ray crystallography studies.

Main Methods:

  • Cloned and expressed a soluble portion of hPIV-1 HN (residues 137-575) in insect cells using baculovirus.
  • Purified the recombinant HN protein via cation-exchange and metal affinity chromatography.
  • Confirmed correct signal peptide removal and N-glycosylation of the purified protein.

Main Results:

  • Successfully expressed and purified soluble hPIV-1 HN protein.
  • The purified HN protein exhibited N-glycosylation.
  • The protein demonstrated neuraminidase activity similar to native hPIV-1 virion HN.

Conclusions:

  • An effective system for expressing and purifying soluble hPIV-1 HN was established.
  • The characterized soluble HN protein can be used for further biochemical investigations.
  • This work provides valuable material for structural studies of paramyxovirus HN.

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