生物技术通报 ›› 2016, Vol. 32 ›› Issue (10): 170-179.doi: 10.13560/j.cnki.biotech.bull.1985.2016.10.021

• 研究报告 • 上一篇    下一篇

海州香薷不同抗性种群液泡转化酶基因EhvINV序列趋异及表达差异分析

蔡深文1, 3, 徐仲瑞2, 熊治廷2, 3, 王加真4, 陈瑶4   

  1. 1. 遵义师范学院资源与环境学院,遵义 563002;
    2. 武汉大学资源与环境科学学院,武汉 430079;
    3. 生物质资源化学与环境生物技术湖北省重点实验室,武汉 430079;
    4. 遵义师范学院生命科学学院,遵义 563002
  • 收稿日期:2016-04-19 出版日期:2016-10-25 发布日期:2016-10-12
  • 作者简介:蔡深文,男,博士,副教授,研究方向:环境生物学;E-mail:caishenwen@163.com
  • 基金资助:
    国家自然科学基金项目(21477093,31270432),生物质资源化学与环境生物技术湖北省重点实验室开放基金项目(HBRCEBL-2013-2014004),遵义师范学院博士基金项目(遵师BS[2014]20号)

Sequence Divergence and Analysis of Expression Difference of Vacuolar Invertase Gene EhvINV from Different Resistant Populations in Elsholtzia haichowensis

CAI Shen-wen1, 3, XU Zhong-rui2, XIONG Zhi-ting2, 3, WANG Jia-zhen4, CHEN Yao4   

  1. 1. College of Resources and Environment,Zunyi Normal College,Zunyi 563002;
    2. School of Resource and Environmental Sciences,Wuhan University,Wuhan 430079;
    3. Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory,Wuhan 430079;
    4. College of Life Science,Zunyi Normal College,Zunyi 563002
  • Received:2016-04-19 Published:2016-10-25 Online:2016-10-12

摘要: 根据GenBank中海州香薷(Elsholtzia haichowensis)液泡转化酶基因EhNvINV(JX500755)和EhCvINV(JX500756)的序列设计特异性引物,克隆cDNA全长序列,并通过生物信息学分析基因及推导的蛋白序列,利用SWISS-MODEL进行同源建模,并与蔗糖分子进行模拟对接,实时荧光定量PCR分析EhNvINV和EhCvINV在铜胁迫下的转录表达。结果表明,海州香薷非抗性和抗性种群液泡转化酶蛋白EhNvINV和EhCvINV在114和346处存在氨基酸趋异位点,模拟3D结构相似,仅在趋异位点Glu114/Gln114和Leu346/Pro346处有差别。EhNvINV、EhCvINV和模拟突变体(EhNvINV-E114Q和EhNvINV-L346P)与蔗糖分子对接形成的活性中心构象基本一致,但在空间位置上存在细微差异。实时荧光定量PCR结果表明铜胁迫7 d后,EhCvINV的表达受铜的诱导,而EhNvINV受铜的抑制。

关键词: 海州香薷, 液泡转化酶, 铜胁迫, 转录表达

Abstract: Specific primers were designed to clone the cDNA sequences according to the EhNvINV(JX500755)and EhCvINV(JX500756)from GenBank. The DNA and deduced amino acid sequences were analyzed by bioinformatics methods. The three-dimensional structures were constructed by homologous modeling. The structures of vacuolar invertase from two populations of E. haichowensis and non-tolerant population with each single point mutation in complex with sucrose were simulated by AutoDock 4.0. Transcript expression of EhNvINVand EhCvINV under copper tress was analyzed by real-time PCR. The results showed that there were two divergent amino acids at position 114 and 346 between EhNvINV and EhCcINV. The three-dimensional structures were exactly similar between EhNvINV and EhCvINV. It showed difference at Glu114/Gln114 and Leu346/Pro346,which were divergent sites. The structures of catalytic active center of EhNvINV,EhCvINV,and simulated mutants(EhNvINV-E114Q,EhNvINV-L346P)binding with sucrose showed no significant differences. However,there were differences on spatial position. The result of real-time PCR indicated that the transcript expression of EhCvINV induced by copper stress after 7 days,however,the transcript expression of EhNvINV inhibited by copper stress after 7 days.

Key words: Elsholtzia haichowensis, vacuolar invertase, copper stress, transcript expression