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J. Virol., 06 1997, 4233-4240, Vol 71, No. 6
U Plikat, K Nieselt-Struwe and A Meyerhans
The evolution of human immunodeficiency virus (HIV) type 1 nef quasispecies
in a patient clonally infected with a contaminated batch of blood clotting
factor IX was monitored. nef sequences were derived at 11, 25, and 41
months postinfection from infected peripheral blood mononuclear cells after
molecular cloning of PCR-amplified proviral DNA. The phylogenetic
relationships among a total of 41 informative sequences were established by
split decomposition analysis and used as a basis to establish a
substitution matrix and to score synonymous (s) and nonsynonymous (ns)
substitutions. The number of observed in-phase stop codons within the nef
sequences was comparable to that expected on a random basis. Similarly, the
numbers of observed s and ns substitutions did not differ significantly
from expected values. No codon position was preferentially mutated. The
maximum sequence divergence increased in a linear manner, with
approximately 4.4 nucleotide and approximately 3.2 amino acid changes per
year. It appears that stochastic processes strongly influence short-term
HIV nef quasispecies evolution in vivo.
Copyright © 1997, American Society for Microbiology
Genetic drift can dominate short-term human immunodeficiency virus type 1 nef quasispecies evolution in vivo
Abteilung Virologie, Institut fur Medizinische Mikrobiologie und Hygiene, Universitat Freiburg, Germany.
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