华北农学报 ›› 2012, Vol. 27 ›› Issue (6): 1-4. doi: 10.3969/j.issn.1000-7091.2012.06.001

所属专题: 水稻 生物技术

• 论文 •    下一篇

水稻OsLEA19a基因在大肠杆菌中的表达和抗逆性分析

胡廷章, 杨俊年, 吴应梅, 陈再刚   

  1. 重庆三峡学院生命科学与工程学院, 重庆 404000
  • 收稿日期:2012-09-20 出版日期:2012-12-28
  • 作者简介:胡廷章(1965-),男,四川简阳人,教授,博士,主要从事生物化学与分子生物学研究。
  • 基金资助:
    重庆市自然科学基金项目(cstc2012jjA80009);重庆市教育委员会科学技术研究项目(KJ111108);重庆高校创新团队建设计划(201040);重庆三峡学院科学研究计划(11ZD-16)

Expression of OsLEA19aGene in Escherichia coliand Its Resistance Analysis

HU Ting-zhang, YANG Jun-nian, WU Ying-mei, CHEN Zai-gang   

  1. School of Life Science and Engineering, Chongqing Three Gorges University, Chongqing 404000, China
  • Received:2012-09-20 Published:2012-12-28

摘要: 根据胚胎发育后期丰富蛋白基因OsLEA19a的读码框序列设计引物,PCR扩增目的基因后,利用基因重组技术成功构建原核表达载体pET30a-OsLEA19a,并将重组质粒转化到E.coliBL21中。优化诱导OsLEA19a表达的条件,使目的蛋白可在E.coliBL21中高效表达。OsLEA19a融合蛋白的SDS-PAGE电泳分析表明,诱导蛋白表达的最适条件是37℃、4 h,融合蛋白的大小大约为30 kDa。抗逆性分析表明,OsLEA19a的表达能增强大肠杆菌对高盐、高渗透压、高温和低温等非生物胁迫的抗性。

关键词: 胚胎发育后期丰富蛋白, OsLEA19a, 蛋白表达, 大肠杆菌, 抗逆性

Abstract: Based on late embryogenesis abundant protein gene OsLEA19aORF sequence,a pair of primers was designed,and the target gene was amplified by PCR. The recombinant expression plasmid pET30a-OsLEA19awas constructed and then transformed into E. coli BL21. Expression conditions of the plasmid encoded OsLEA19apeptide in E. coli BL21 cells were optimized. The quantitative analysis of the fusion protein by SDA-PAGE showed that the optimal expression conditions were the expression temperature of 37℃ for 4 h. An about 30 kDa fusion protein was identified. The results of stress tolerance assay demonstrated that recombinant E. coil cells producing OsLEA19a fusion protein exhibited improved resistance against diverse abiotic stresses: high salinity,hyperosmotic,heat and freezing.

Key words: Late embryogenesis abundant protein, OsLEA19a, Protein expression, Escherichia coli, Resistance

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引用本文

胡廷章, 杨俊年, 吴应梅, 陈再刚. 水稻OsLEA19a基因在大肠杆菌中的表达和抗逆性分析[J]. 华北农学报, 2012, 27(6): 1-4. doi: 10.3969/j.issn.1000-7091.2012.06.001.

HU Ting-zhang, YANG Jun-nian, WU Ying-mei, CHEN Zai-gang. Expression of OsLEA19aGene in Escherichia coliand Its Resistance Analysis[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2012, 27(6): 1-4. doi: 10.3969/j.issn.1000-7091.2012.06.001.

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