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. 1985 Dec;82(24):8577–8581. doi: 10.1073/pnas.82.24.8577

Sequence-directed mutagenesis: evidence from a phylogenetic history of human alpha-interferon genes.

G B Golding, B W Glickman
PMCID: PMC390960  PMID: 3866242

Abstract

We have studied the potential contribution of template-dependent events to genetic variation in mammals by examining the sequence alterations that have occurred in the recent evolution of human interferon genes. Fifteen members of the human alpha-interferon gene family were aligned, and a phylogenetic history was inferred. Many multiple events are inferred to have occurred in the evolution of the interferon genes and for the majority of these local DNA sequences were present that were capable of serving as templates for their occurrence. We conclude that the DNA sequence has the potential to explain many of the inferred spontaneous events and to explain complex alterations to sequences--i.e., the joint occurrence of base substitutions and insertions/deletions. Thus, such a mechanism would often cause multiple sequence changes as a result of a single mutational event and would provide additional genetic variation for evolution. Sequence-directed mutations would depend upon the local DNA sequences and, hence, would not be random at the DNA level.

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Selected References

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