tetano
Editor, Senior Moderator
Elife. 2017 Jun 9;6. pii: e26437. doi: 10.7554/eLife.26437. [Epub ahead of print]
[h=1]A novel twelve class fluctuation test reveals higher than expected mutation rates for influenza A viruses.[/h] Pauly MD[SUP]1[/SUP], Procario MC[SUP]1[/SUP], Lauring AS[SUP]1[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Influenza virus' low replicative fidelity contributes to its capacity for rapid evolution. Clonal sequencing and fluctuation tests have suggested that the influenza virus mutation rate is 2.7x10[SUP]-6[/SUP] - 3.0x10[SUP]-5[/SUP] substitutions per nucleotide per strand copied (s/n/r). However, sequencing assays are biased toward mutations with minimal fitness impacts and fluctuation tests typically investigate only a subset of all possible single nucleotide mutations. We developed a fluctuation test based on reversion to fluorescence in a set of virally encoded mutant green fluorescent proteins, which allowed us to measure the rates of selectively neutral mutations representative of the twelve different mutation types. We measured an overall mutation rate of 1.8x10[SUP]-4[/SUP] s/n/r for PR8 (H1N1) and 2.5x10[SUP]-4[/SUP] s/n/r for Hong Kong 2014 (H3N2) and a transitional bias of 2.7-3.6. Our data suggest that each replicated genome will have an average of 2-3 mutations and highlight the importance of mutational load in influenza virus evolution.
[h=4]KEYWORDS:[/h] evolutionary biology; genomics; infectious disease; microbiology; viruses
PMID: 28598328 DOI: 10.7554/eLife.26437
Free full text
[h=1]A novel twelve class fluctuation test reveals higher than expected mutation rates for influenza A viruses.[/h] Pauly MD[SUP]1[/SUP], Procario MC[SUP]1[/SUP], Lauring AS[SUP]1[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Influenza virus' low replicative fidelity contributes to its capacity for rapid evolution. Clonal sequencing and fluctuation tests have suggested that the influenza virus mutation rate is 2.7x10[SUP]-6[/SUP] - 3.0x10[SUP]-5[/SUP] substitutions per nucleotide per strand copied (s/n/r). However, sequencing assays are biased toward mutations with minimal fitness impacts and fluctuation tests typically investigate only a subset of all possible single nucleotide mutations. We developed a fluctuation test based on reversion to fluorescence in a set of virally encoded mutant green fluorescent proteins, which allowed us to measure the rates of selectively neutral mutations representative of the twelve different mutation types. We measured an overall mutation rate of 1.8x10[SUP]-4[/SUP] s/n/r for PR8 (H1N1) and 2.5x10[SUP]-4[/SUP] s/n/r for Hong Kong 2014 (H3N2) and a transitional bias of 2.7-3.6. Our data suggest that each replicated genome will have an average of 2-3 mutations and highlight the importance of mutational load in influenza virus evolution.
[h=4]KEYWORDS:[/h] evolutionary biology; genomics; infectious disease; microbiology; viruses
PMID: 28598328 DOI: 10.7554/eLife.26437
Free full text