生物技术通报 ›› 2013, Vol. 0 ›› Issue (4): 81-84.

• 研究报告 • 上一篇    下一篇

RNA 编辑修复藻苔(Takakia lepidozioides)叶绿体accD 基因中的突变

万平   

  1. 首都师范大学生命科学学院,北京 100048
  • 收稿日期:2012-11-12 修回日期:2013-04-22 出版日期:2013-04-22 发布日期:2013-04-22
  • 作者简介:万平,男,博士,研究方向:生物信息学;E-mail :wanp_cnu@yahoo.com.cn

RNA Editing Restores Mutations in the Chloroplast Gene accD of Takakia lepidozioides

Wan Ping   

  1. College of Life Science,Capital Normal University,Beijing 100048
  • Received:2012-11-12 Revised:2013-04-22 Published:2013-04-22 Online:2013-04-22

摘要: 藻苔(Takakia lepidozioides)叶绿体基因组中存在着非常高的RNA 编辑频率,这种现象至今没有得到很好的解释。 本研究采用比较基因组学方法,对小立碗藓(Physcomitrella patens)、青苔(Syntrichia ruralis)和藻苔3 种苔藓植物中accD 基因的 DNA 序列和基因编码的蛋白氨基酸序列进行比较分析。研究发现,经过RNA 编辑,藻苔的基因产物获得了与其同源基因相同的氨 基酸序列。藻苔中高频发生的RNA 编辑是对基因组中DNA 突变的一种修复,提高了藻苔对强辐射环境的生存适应能力。

关键词: RNA, 编辑, 藻苔, 修复, 突变

Abstract: RNA editing highly occurs in Takakia lepidozioides chloroplast. The reason underlying the phenominon remains unclear. In this study, with comparative genomic approach, we analized the sequences of the gene accD and its protein products in mosses Physcomitrella patens, Syntrichia ruralis, and Takakia lepidozioides. We find that RNA editing restores mutations in the gene accD of T. lepidozioides, T. lepidozioides aquires the same amino acid sequence as its homologs in Physcomitrella patens and Syntrichia ruralis. The high occurrence of RNA editing in T. lepidozioides chloroplast is an important stratigy to restore DNA mutations. RNA editing enhences T. lepidozioides the adaptation to survive under the high radiation enviroment.

Key words: RNA editing, Takakia lepidozioides, Restore, Mutation