Evolution of the vertebrate DNMT3 gene family: A possible link between existence of DNMT3L and genomic imprinting

T. Yokomine, K. Hata, M. Tsudzuki, H. Sasaki

研究成果: ジャーナルへの寄稿学術誌査読

59 被引用数 (Scopus)

抄録

DNA methylation plays an essential role in genomic imprinting observed in eutherian mammals and marsupials. In mouse, one of the two de novo DNA methyltransferases, Dnmt3a, and a related protein, Dnmt3L have been shown to be essential for imprint establishment in the parental germline. To gain insights into the evolution of imprinting mechanisms, we have identified and characterized the DNMT3 family genes in other vertebrate species. We cloned cDNAs for chicken DNMT3A and DNMT3B, whose putative protein products shared 81.5% and 48.6% amino acid sequence identity with their mouse orthologues. Using computer-assisted database searches, we also identified DNMT3A and DNMT3B orthologues in fish (fugu and zebrafish) and marsupials (opossum). We found that, while opossums had an orthologue for DNMT3L, chickens and fish did not have this gene. Thus, unlike the other DNMT3 members, DNMT3L was restricted to the species in which imprinting occurs. The acquisition of DNMT3L by a common ancestor of eutherians and marsupials might have been closely related to the evolution of imprinting.

本文言語英語
ページ(範囲)75-80
ページ数6
ジャーナルCytogenetic and Genome Research
113
1-4
DOI
出版ステータス出版済み - 3月 2006
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 遺伝学(臨床)
  • 遺伝学
  • 分子生物学

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