GM Air, AJ Gibbs, WG Laver, and RG Webster. Evolutionary Changes in Influenza B are Not Primarily Governed by Antibody Selection. PNAS, May 1990; 87: 3884 - 3888
Evolutionary Changes in Influenza B are Not Primarily Governed by Antibody Selection
GM Air, AJ Gibbs, WG Laver and RG Webster
Influenza B viruses evolve more slowly than human influenza A, but no reasons for the difference have been established. We have analyzed sequence changes in the hemagglutinin and neuraminidase of influenza B viruses (and have determined four hemagglutinin sequences, of B/Bonn/43,B/USSR/100/83,B/Victoria/3/85, and B/Memphis/6/86) in relation to antigenic properties and compared these with similar analyses of variation in influenza A antigens. Independent of the slower rate of change in influenza B antigens, only approximately 30% of nucleotide changes in either the hemagglutinin or neuraminidase gene sequence result in amino acid changes in the protein, whereas in influenza A 50% of nucleotide changes result in altered amino acids. Thus, there is less selection for change, or less tolerance to change, in the influenza B antigens. This is similar to findings with influenza C and findings with influenza A viruses that replicate in lower animals and birds and is closer to the type of variation found in other RNA viruses. We propose that human influenza A is unique in that it is the only virus group in which antibody selection dominates evolutionary change.
See Also:
Latest articles in those days:
- Nucleic acid detection and genomic sequence analysis of one H5N1 avian influenza virus from wide birds around Qinghai Lake 1 days ago
- An aggregated dataset of serial morbidity and titer measurements from influenza A virus-infected ferrets 1 days ago
- Structures of H5N1 influenza polymerase with ANP32B reveal mechanisms of genome replication and host adaptation 4 days ago
- Risk assessment of a highly pathogenic H5N1 influenza virus from mink 4 days ago
- Detection of clade 2.3.4.4b highly pathogenic H5N1 influenza virus in New York City 4 days ago
[Go Top] [Close Window]