Distribution and abundance of microsatellites in the yeast genome can Be explained by a balance between slippage events and point mutations.

Journal Article (Journal Article)

We fit a Markov chain model of microsatellite evolution introduced by Kruglyak et al. to data on all di-, tri-, and tetranucleotide repeats in the yeast genome. Our results suggest that many features of the distribution of abundance and length of microsatellites can be explained by this simple model, which incorporates a competition between slippage events and base pair substitutions, with no need to invoke selection or constraints on the lengths. Our results provide some new information on slippage rates for individual repeat motifs, which suggest that AT-rich trinucleotide repeats have higher slippage rates. As our model predicts, we found that many repeats were adjacent to shorter repeats of the same motif. However, we also found a significant tendency of microsatellites of different motifs to cluster.

Full Text

Duke Authors

Cited Authors

  • Kruglyak, S; Durrett, R; Schug, MD; Aquadro, CF

Published Date

  • August 2000

Published In

Volume / Issue

  • 17 / 8

Start / End Page

  • 1210 - 1219

PubMed ID

  • 10908641

Electronic International Standard Serial Number (EISSN)

  • 1537-1719

International Standard Serial Number (ISSN)

  • 0737-4038

Digital Object Identifier (DOI)

  • 10.1093/oxfordjournals.molbev.a026404


  • eng