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Novel gene conversion between X-Y homologues located in the nonrecombining region of the Y chromosome in Felidae (Mammalia)

  1. Author:
    Slattery, J. P.
    Sanner-Wachter, L.
    O'Brien, S. J.
  2. Author Address

    Slattery JP NCI, Frederick Canc Res & Dev Ctr, Lab Genom Divers Frederick, MD 21702 USA NCI, Frederick Canc Res & Dev Ctr, Lab Genom Divers Frederick, MD 21702 USA
    1. Year: 2000
  1. Journal: Proceedings of the National Academy of Sciences of the United States of America
    1. 97
    2. 10
    3. Pages: 5307-5312
  2. Type of Article: Article
  1. Abstract:

    Genes located on the mammalian Y chromosome outside of the pseudoautosomal region do not recombine with those on the X and are predicted to either undergo selection for male function or gradually degenerate because of an accumulation of deleterious mutations. Here, phylogenetic analyses of X-Y homologues, Zfx and Zfy, among 26 felid species indicate two ancestral episodes of directed genetic exchange (ectopic gene conversion) from X to Y: once during the evolution of pallas cat and once in a common predecessor of ocelot lineage species. Replacement of the more rapidly evolving Y homologue with the evolutionarily constrained X copy may represent a mechanism for adaptive editing of functional genes on the nonrecombining region of the mammalian Y chromosome. [References: 43]

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