アーキアに見いだされる種々の進化過程

DOI NDLデジタルコレクション Web Site
  • 河原林 裕
    九州大学大学院農学研究院 産業技術総合研究所・健康工学研究部門

書誌事項

タイトル別名
  • DETECTION OF THE EVOLUTIONAL PROCESS TRACED FROM THE ARCHAEAL GENOMIC DATA
  • アーキア ニ ミイダサレル シュジュ ノ シンカ カテイ

この論文をさがす

説明

<p>Archaea was established according to difference of 16S rRNA nucleotide sequences, and is thought to be the ancestral organism for eukaryote. Now many entire nucleotide sequences of Archaeal genomes are available. By comparing among Archaeal genomic data, information for their evolution can be extracted. In this work, the evolutional features are extracted from genomic information of three Archaeal species, Pyrococcus horikoshii, Aeropyrum pernix and Sulfolobus tokodaii. 1. From the comparison of the overall positioning of the similar genes, it is shown that two Pyrococcus species, P. abyssi and P. horikoshii, conserve their overall gene ordering with a few times grovel genomic recombination, revealing that these two species were separated recently. Conversely, species in genus Sulfolobus did not show any structural similarity of genome, predicting that species in genus Sulfolobus were developed independently. 2. Among Pyrococcus species, the gene ordering within the mannosylglycerate biosynthesis gene cluster is completely retained with high sequence similarity of each gene, revealing that this cluster is thought to be important for genus Pyrococcus. 3. From comparison of gene ordering within the UDP-GlcNAc biosynthesis gene cluster, it is shown that phylogenetic distance between P. horikoshii and A. pernix is closer than that between P. horikoshii and S. tokodaii. 4. When compared the amino acid sequences of the gene family, functionally similar genes are consisting a phylogenetic cluster. But when compared the nucleotide sequences, genes from same species are consisting a phylogenetic cluster. These results indicate that nucleotide sequences were developed with retaining features of the host species, but the translated amino acid sequences were developed under pressure of the function. 5. Other features, like presence or absence of plasmid, transposable elements, duplication and recombination, also provide the important information on evolution. These analyses shown above indicate detail analysis is necessary for recognition of the recent history of genomic evolution.</p>

収録刊行物

  • Viva Origino

    Viva Origino 41 (2), 14-19, 2013

    生命の起原および進化学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ