生物技术通报 ›› 2016, Vol. 32 ›› Issue (7): 131-137.doi: 10.13560/j.cnki.biotech.bull.1985.2016.07.020

• 研究报告 • 上一篇    下一篇

球根白丝膜菌γ-actin基因的克隆及表达分析

张虹,峥嵘   

  1. 内蒙古师范大学生命科学与技术学院,呼和浩特 010022
  • 收稿日期:2015-12-25 出版日期:2016-07-25 发布日期:2016-07-25
  • 作者简介:张虹,女,硕士研究生,研究方向:菌根生物技术;E-mail:944434952@qq.com
  • 基金资助:
    国家自然科学基金项目(31060110,31360125),内蒙古自然科学基金项目(2012MS0526)

Cloning and Expression Analysis of γ-actin Gene from Leucocortinarius bulbiger

ZHANG Hong ZHENG Rong   

  1. College of Life Sciences and Technology,Inner Mongolia Normal University,Hohhot 010022
  • Received:2015-12-25 Published:2016-07-25 Online:2016-07-25

摘要: 根据真菌肌动蛋白(actin)基因保守区序列设计引物,用简并PCR法和RACE技术分离得到球根白丝膜菌(Leucocortinarius bulbiger)γ-肌动蛋白基因(Lb-act)的全长cDNA序列。该序列全长为1 357 bp,包含一个1 137 bp的开放阅读框(ORF),编码378个氨基酸,5'端非翻译区(5' UTR)92 bp,3' UTR长度128 bp。Port Param软件在线分析结果表明,该cDNA所编码的蛋白质理论等电点为5.12,相对分子质量为95.022 kD,具有真菌γ-actin基因3个保守特征序列。Blast同源性检索结果表明,Lb-act氨基酸序列与担子菌肌动蛋白序列有较高的相似性,其与双色蜡蘑的肌动蛋白氨基酸序列的亲缘关系最近。Lb-act基因在不同碳源及磷水平培养条件下表达量基本一致,验证了该基因作为分子内标的可靠性。

关键词: 球根白丝膜菌, 肌动蛋白, cDNA, 克隆

Abstract: Designing the primers based on the conserved sequences of several fungal actin genes,the full-length cDNA sequence of γ-actin gene from Leucocortinarius bulbiger(Lb-act)was cloned using RT-PCR and RACE. The full-length of Lb-act cDNA sequence was 1 357 bp,consisting of a 1 137 bp open reading frame(ORF),encoding a protein of 378 amino acids,a 5'-UTR with 92 bp and a 3'-UTR with 128 bp. The online analysis by Port Param software revealed that the putative amino acids had an isoelectric point of 5.12,a molecular weight of 95.022 kD,and 3 highly conserved regions of fungal γ-actin gene. Blast homology search indicated that the sequences of Lb-act amino acid had a high similarity with the sequences of Basidiomycetes actin,and it had the closest relationship with the amino acid sequence of Laccaria bicolor actin. In culture conditions of different carbon and phosphorus levels,the expression levels of Lb-act were almost the same,thus this research confirmed the reliability that actin gene could be used as intermolecular standard.

Key words: Leucocortinarius bulbiger, actin gene, cDNA, clone