Adaptive mutation by deletions in small mononucleotide repeats

Susan M. Rosenberg, Simonne Longerich, Pauline Gee, Reuben S. Harris

Resultado de la investigación: Articlerevisión exhaustiva

186 Citas (Scopus)

Resumen

Adaptive reversion of a +1 frameshift mutation in Escherichia coli, which requires homologous recombination functions, is shown here to occur by -1 deletions in regions of small mononucleotide repeats. This pattern makes improbable recombinational mechanisms for adaptive mutation in which blocks of sequences are transferred into the mutating gene, and it supports mechanisms that use DNA polymerase errors. The pattern appears similar to that of mutations found in yeast cells and in hereditary colon cancer cells that are deficient in mismatch repair. These results suggest a recombinational mechanism for adaptive mutation that functions through polymerase errors that persist as a result of a deficiency in post-synthesis mismatch repair.

Idioma originalEnglish (US)
Páginas (desde-hasta)405-407
Número de páginas3
PublicaciónScience
Volumen265
N.º5170
DOI
EstadoPublished - jul. 15 1994
Publicado de forma externa

ASJC Scopus subject areas

  • General

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