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园艺学报 ›› 2010, Vol. 37 ›› Issue (6): 869-879.

• 果树 • 上一篇    下一篇

32种果树microRNA的生物信息学预测与分析

宋长年1,贾启东2,王 晨1,李 飞2,章 镇1,房经贵1,*   

  1. (1南京农业大学园艺学院,南京210095;2南京农业大学植物保护学院,南京210095)
  • 收稿日期:2009-12-30 修回日期:2010-04-29 出版日期:2010-06-25 发布日期:2010-06-25
  • 通讯作者: 房经贵

Computational Identification and Analysis of the Putative microRNAs in 32 Fruit Crops

SONG Chang-nian1,JIA Qi-dong2,WANG Chen1,LI Fei2,ZHANG Zhen1,and FANG Jing-gui1, *   

  1. (1College of Horticulture,Nanjing Agricultural University,Nanjing 210095,China;2College of Plant Protection,Nanjing Agricultural University,Nanjing 210095,China)
  • Received:2009-12-30 Revised:2010-04-29 Online:2010-06-25 Published:2010-06-25
  • Contact: FANG Jing-gui

摘要: 通过生物信息学预测miRNA的方法,采用基于生物信息学的基因搜索和同源搜索的方法成功地从NCBI数据库中登录的32种果树的EST中寻找miRNAs。从32种果树的774 400条ESTs中找到了110条miRNA前体序列,编码116条成熟体序列。利用miRbase数据库进一步分析,结果表明116个miRNAs属于45个miRNA家族,其中有7个保守的miRNA家族中的miRNA个数在5以上,20 个 miRNA家族的miRNA个数在 2 ~ 4,有18个miRNA家族的miRNA数量为1个。在柑橘、苹果、香蕉、猕猴桃和桃等果树中分别发现28、16、13、11和10个miRNAs。果树中miRNA的序列比较发现,相同家族的miRNA的序列存在一定水平的差异,其中碱基的变化包括相似频率的颠换与转换。

关键词: microRNA, 生物信息学预测, 果树, EST

Abstract: Here we present a study of bioinformatics identification of microRNA precursors in fruit crops by blasting ESTs of 32 fruit crops in NCBI using bioinformatics-based gene search and homology search method to look for miRNAs in fruit crops. A total of 110 miRNA precursors,encoding 116 unique miRNA sequences,were identified in these fruit crops. Further analysis through the miRbase database showed the 116 miRNAs belonged to 45 miRNA families,of which 7 were predicted with miRNA number more than 5,20 between 2–4,and the other 18 with only 1 miRNA. miRNAs were identified in Citrus,apple,bananas,kiwifruit and peach,and the numbers of miRNAs found in them were 28,16,13,11,and 10,respectively. The results of the alignment of 6 miRNA families showed the nucleotide sequences of the miRNAs in same family were variable,and the variation between the nucleotides of same locus could be of transversion and transition.

Key words: microRNA, bioinformatics prediction, fruit crop, EST

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