Archives of Virology

, Volume 144, Issue 4, pp 781–786

Strain-specific differences in the effect of influenza A virus neuraminidase on vector-expressed hemagglutinin

  • N. V. Kaverin
  • H.-D. Klenk
Brief Report

DOI: 10.1007/s007050050543

Cite this article as:
Kaverin, N. & Klenk, HD. Arch. Virol. (1999) 144: 781. doi:10.1007/s007050050543


In order to evaluate the efficiency of the removal of sialic acid residues from the influenza virus hemagglutinin by the viral neuraminidase in the course of the virus replication cycle, CV-1 cells expressing the hemagglutinin of H7 subtype from an SV40-based vector were superinfected with influenza virus strain A/Duck/Ukraine/63 (H3N8) or A/USSR/90/77 (H1N1). Vector-expressed hemagglutinin was immunoprecipitated from cell lysates and analyzed by polyacrylamide gel electrophoresis. The data indicate that the removal of sialic acid residues from the vector-expressed H7 hemagglutinin by N1 neuraminidase of A/USSR/90/77 virus in the course of the virus replication cycle is incomplete. The results are discussed in connection with previously published data showing that the low activity of NA in wild-type influenza virus results in incomplete removal of sialic acid residues from virion components.

Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • N. V. Kaverin
    • 1
  • H.-D. Klenk
    • 1
  1. 1.Institut für Virologie, Philipps Universität Marburg, Marburg, GermanyGermany

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