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Structure of the influenza C glycoprotein gene as determined from cloned DNA

Authors
Journal
Virus Research
0168-1702
Publisher
Elsevier
Publication Date
Volume
1
Issue
4
Identifiers
DOI: 10.1016/0168-1702(84)90017-0
Keywords
  • Influenza C Virus Segment 4
  • Glycoprotein Gene
  • Nucleic Acid Sequence
  • Hemagglutinin
Disciplines
  • Biology

Abstract

Abstract The complete nucleotide sequence of RNA segment 4 of influenza C/JHB/1/66 virus has been determined, utilizing cloned cDNA derived from the viral RNA segment. The gene is 2073 nucleotides in length, and can code for a polypeptide of 655 amino acids, which corresponds to the viral glycoprotein. The predicted polypeptide has a molecular weight of 72063, not including oligosaccharides linked to eight predicted glycosylation sites. The influenza C glycoprotein shares structural features with hemagglutinin (HA) glycoproteins of influenza A and B viruses, including three stretches of hydrophobic amino acids believed to function as a signal sequence, a fusion function, and a membrane anchor. However, a substantial part of the protein lacks direct sequence homology to these HA glycoproteins. The results suggest a more distant evolutionary relationship between influenza C virus and influenza A and B viruses, compared to that between influenza A and B themselves.

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