| Literature DB >> 15861301 |
Alexander S Graphodatsky1, Anna V Kukekova, Dmitry V Yudkin, Vladimir A Trifonov, Nadezhda V Vorobieva, Violetta R Beklemisheva, Polina L Perelman, Daria A Graphodatskaya, Lyudmila N Trut, Fengtang Yang, Malcolm A Ferguson-Smith, Gregory M Acland, Gustavo D Aguirre.
Abstract
Plant and animal karyotypes sometimes contain variable elements, that are referred to as additional or B-chromosomes. It is generally believed that B-chromosomes lack major genes and represent parasitic and selfish elements of a genome. Here we report, for the first time, the localization of a gene to B-chromosomes of mammals: red fox (Vulpes vulpes) and two subspecies of raccoon dog (Nyctereutes procyonoides). Identification of the proto-oncogene C-KIT on B-chromosomes of two Canidae species that diverged from a common ancestor more than 12.5 million years ago argues against the current view of B-chromosomes. Analyses of fox B-chromosomal C-KIT gene from a flow-sorted fox B-chromosome-specific library revealed the presence of intron-exon boundaries and high identity between sequenced regions of canine and fox B-chromosomal C-KIT copies. Identification of C-KIT gene on all B-chromosomes of two canid species provides new insight into the origin and evolution of supernumeraries and their potential role in the genome.Entities:
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Year: 2005 PMID： 15861301 DOI： 10.1007/s10577-005-7474-9
Source DB: PubMed Journal: Chromosome Res ISSN： 0967-3849 Impact factor: 5.239