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植物研究 ›› 2016, Vol. 36 ›› Issue (6): 909-916.doi: 10.7525/j.issn.1673-5102.2016.06.015

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白桦BpCesA基因的生物信息学及表达分析

申婷婷1, 姜静1, 刘桂丰1, 许思佳1, 李慧玉1, 袁红梅1,2   

  1. 1. 东北林业大学林木遗传育种国家重点实验室, 哈尔滨 150040;
    2. 黑龙江省农业科学院经济作物研究所, 哈尔滨 150086
  • 收稿日期:2016-09-09 出版日期:2016-11-15 发布日期:2016-11-16
  • 通讯作者: 李慧玉,E-mail:lihuiyu0519@aliyun.com E-mail:lihuiyu0519@aliyun.com
  • 作者简介:申婷婷(1990-),女,硕士研究生,主要从事林木遗传育种研究。
  • 基金资助:
    “十二五”农村领域国家科技计划课题(2012BAD21B02);东北林业大学林木遗传育种国家重点实验室开放基金项目(201203)

Bioinformatics and Expression Analysis of BpCesA Genes of Betula platyphylla

SHEN Ting-Ting1, JIANG Jing1, LIU Gui-Feng1, XU Si-Jia1, LI Hui-Yu1, YUAN Hong-Mei1,2   

  1. 1. State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040;
    2. Industrial Crops Institute of Heilongjiang Academy of Agricultural Sciences, Harbin 150086
  • Received:2016-09-09 Online:2016-11-15 Published:2016-11-16
  • Supported by:
    National Science and Technology Planning Project of "12th Five-Year"(2012BAD21B02); State Key Laboratory of Tree Genetics and Breeding Northeast Forestry University(201203)

摘要: 从白桦45个转录组数据中分析获得6条白桦纤维素合成酶基因,其中2条为该家族的新基因,通过生物信息学及实时定量PCR技术探讨白桦BpCesA在不同材性白桦中的表达量情况。结果表明,6条白桦BpCesA基因的ORF长度在2 958~3 312 bp,编码的氨基酸数目在985~1 103 aa,相对分子量在110.40~124.29 kD,理论等电点为5.90~7.43;6条BpCesA均含有D,D,D,QXXRW保守结构域和8个跨膜螺旋,其中2个位于N端,6个位于C端。对来自6个双子叶植物,4个单子叶植物和1个裸子植物的52条CesA进行了聚类分析发现:白桦BpCesA与同为木本的杨树PtrCesA具有较高的同源性,其中BpCesA2与PtrCesA3同源性达到92%、另外BpCesA5与PtrCesA6、BpCesA1与PtrCesA8也具有较高的同源性,分别为89%和82%。BpCesA1、BpCesA2、BpCesA3、BpCesA5基因随纤维素含量的增加,表达量也呈现增加趋势,推测这些基因在白桦的纤维素合成中起到促进的作用。本研究为揭示纤维素合成酶基因的功能分析提供了基础。

关键词: 白桦, 纤维素, 木质素, 生物信息学, 表达量

Abstract: Six cellulose synthase genes of Betula platyphylla from 45 transcriptome data sets were obtained, in which two genes were new genes of cellulose synthase gene family. The sequence characteristic and expression levels in Birch xylem of BpCesA were analyzed using bioinformatics and quantitative real-time PCR. The ORF length of 6 BpCesA genes varied from 2 958-3 312 bp; Number of amino acids encoded varied from 985-1 103 aa, and relative molecular weight varied from 110.40-124.29 kD; Theoretical isoelectric point was from 5.90-7.43. Six BpCesA genes all contained D, D, D, QXXRW conservative structure domain and eight transmembrane helices, in which two were located at the end of the N, and the others were at the end of the C. 52 CesAs from six dicotyledonous plants, four monocotyledons, and one gymnosperms were analyzed by cluster analysis, and BpCesAs had higher homology with PtrCesA. The homology between BpCesA2 and PtrCesA3 reached 92%. BpCesA5 and PtrCesA6, BpCesA1 and PtrCesA8 also had high homology of 89% and 82%, respectively. The RNA level of BpCesA1, BpCesA2, BpCesA3 and BpCesA5 was increased with the increase of cellulose content. This results suggested that these genes play a positive role in cellulose synthesis in birch. This study provides a basis for the functional analysis of cellulose synthase gene.

Key words: Betula platyphylla, cellulose, lignin, bioinformatics, expression quantity

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