ウエダ ナオコ   Ueda Naoko
  上田 直子
   所属   崇城大学  薬学部 薬学科
   崇城大学大学院  工学研究科 応用生命科学専攻(博士前期課程)
   崇城大学大学院  工学研究科 応用生命科学専攻(博士後期課程)
   職種   教授
言語種別 英語
発行・発表の年月 2018/07
形態種別 原著論文
査読 査読有り
標題 The habu genome reveals accelerated evolution of venom protein genes.
執筆形態 共著
掲載誌名 Sci Rep.
掲載区分国外
巻・号・頁 8(1),pp.11300
著者・共著者 Shibata H, Chijiwa T, Oda-Ueda N, Nakamura H, Yamaguchi K, Hattori S, Matsubara K, Matsuda Y, Yamashita A, Isomoto A, Mori K, Tashiro K, Kuhara S, Yamasaki S, Fujie M, Goto H, Koyanagi R, Takeuchi T, Fukumaki Y, Ohno M, Shoguchi E, Hisata K, Satoh N, Ogawa T.
概要 Evolution of novel traits is a challenging subject in biological research. Several snake lineages developed elaborate venom systems to deliver complex protein mixtures for prey capture. To understand mechanisms involved in snake venom evolution, we decoded here the ~1.4-Gb genome of a habu, Protobothrops flavoviridis. We identified 60 snake venom protein genes (SV) and 224 non-venom paralogs (NV), belonging to 18 gene families. Molecular phylogeny reveals early divergence of SV and NV genes, suggesting that one of the four copies generated through two rounds of whole-genome duplication was modified for use as a toxin. Among them, both SV and NV genes in four major components were extensively duplicated after their diversification, but accelerated evolution is evident exclusively in the SV genes. Both venom-related SV and NV genes are significantly enriched in microchromosomes. The present study thus provides a genetic background for evolution of snake venom composition.