Format

Send to

Choose Destination
Mol Microbiol. 1995 Oct;18(2):185-9.

Molecular handles on adaptive mutation.

Author information

1
Department of Biochemistry, University of Alberta, Edmonton, Canada.

Abstract

In one experimental system, several handles on the molecular mechanism of apparent adaptive mutation have emerged. The system is reversion of a lac frameshift mutation in Escherichia coli. The molecular handles include a requirement for homologous recombination; the implication of DNA double-strand breaks as a molecular intermediate; a unique sequence spectrum of -1 deletions in mononucleotide repeats which implies polymerase errors, and also implies a failure of postsynthesis mismatch repair on those errors; and the involvement of sexual functions at some stage of the process. These molecular handles are revealing an unexpected new mechanism of mutagenesis.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center