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Convergent HIV evolution across species
Human immunodeficiency virus (HIV) has a highly diverse envelope protein that it uses to target human cells, and the complexity of the viral envelope has stymied vaccine development. Roark et al. report that the immediate and short-term evolutionary potential of the HIV envelope is constrained because of a number of essential functions, including antibody escape. Consequently, when introduced into humans as HIV or into rhesus macaque monkeys as chimeric simian-human immunodeficiency virus, homologous envelope glycoproteins appear to exhibit conserved patterns of sequence evolution, in some cases eliciting broadly neutralizing antibodies in both hosts. Conserved patterns of envelope variation and homologous B cell responses in humans and monkeys represent examples of convergent evolution that may serve to guide HIV vaccine development.
Science, this issue p. eabd2638
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