中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (2): 315-319.doi: 10.3969/j.issn.2095-4344.2013.02.023

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

突变型Cdh1基因真核表达质粒的构建及鉴定

李立,石小云,张登文,张传汉,姚文龙   

  1. 华中科技大学同济医学院附属同济医院麻醉学教研室,湖北省武汉市 430030
  • 收稿日期:2012-05-09 修回日期:2012-05-20 出版日期:2013-01-08 发布日期:2013-01-08
  • 通讯作者: 姚文龙,主治医师,华中科技大学同济医学院附属同济医院麻醉学教研室,湖北省武汉市 430030 wlyao82@126.com
  • 作者简介:李立☆,女, 1981年生,湖北省武汉市人,汉族,华中科技大学同济医学院基础医学院病理生理学系在读博士,主要从事神经发育与再生研究。lily81630@126.com
  • 基金资助:

    国家自然科学基金(81000476)。

Construction and identification of a mutated-Cdh1 eukaryotic expressing vector

Li Li, Shi Xiao-yun, Zhang Deng-wen, Zhang Chuan-han, Yao Wen-long   

  1. Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan  430030, Hubei Province, China
  • Received:2012-05-09 Revised:2012-05-20 Online:2013-01-08 Published:2013-01-08
  • Contact: Yao Wen-long, Attending physician, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, Hubei Province, China wlyao82@126.com
  • About author:Li Li☆, Studying for doctorate, Department of pathophysiology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, Hubei Province, China lily81630@126.com
  • Supported by:

    Supported by: the National Natural Science Foundation of China, No. 81000476

摘要:

背景:细胞周期末期促进复合物调节亚基Cdh1的活性受到磷酸化调节,磷酸化的Cdh1不能与细胞周期末期促进复合物结合,从而抑制细胞周期末期促进复合物的活性。
目的:构建突变型Cdh1基因真核表达质粒及鉴定。
方法:采用RT-PCR方法,从大鼠海马组织扩增出Cdh1基因编码序列。通过限制性内切酶EcoRⅠ和XbaⅠ双酶切PCR回收产物和pBluescript质粒将Cdh1基因克隆到pBluescript质粒上。根据定点突变技术原理,以含Cdh1编码序列的pBluescript-Cdh1质粒为模版,针对Cdh1第40、151、163位丝氨酸(S)和第121位苏氨酸(T)设计4对突变引物,将4个氨基酸位点全部突变为丙氨酸(A)。最后通过测序鉴定。
结果与结论:经电泳鉴定PCR扩增产物大小约为1 500 bp,包括Cdh1基因完整的编码序列、编码序
列两端引入的酶切位点以及KOZAK序列,与预期相符。重组质粒pBluescript-Cdh1经EcoRⅠ和XbaⅠ
双酶切鉴定与预期结果符合。DNA测序比对发现Cdh1(BC162059.1)编码序列第930位碱基A在重组
质粒pBluescript-Cdh1上突变为G,但氨基酸无变化,为同义突变,其他DNA序列无突变。经测序鉴
定pBluescript-Cdh1-4A40、121、151、163突变质粒第40、121、151、163位氨基酸全部突变为丙氨酸。提
示实验成功构建磷酸化位点突变型Cdh1基因真核表达质粒。

关键词: 组织构建, 组织构建细胞学实验, 细胞周期末期促进复合物, Cdh1, 定点突变, 聚合酶联反应, 真核表达质粒, 神经系统, 发育, 神经损伤修复, 基因治疗, 国家自然科学基金

Abstract:

BACKGROUND: The activity of anaphase promoting complex-Cdh1 is regulated by phosphorylation.
Phosphorylated Cdh1 cannot be combined with anaphase promoting complex, thereby inhibiting the activity
of the anaphase promoting complex.
OBJECTIVE: To construct and identify a mutated-Cdh1 eukaryotic expressing vector.
METHODS: The entire coding sequence of the Cdh1 gene was amplified from rat hippocampal mRNA by reverse transcription-PCR. Then the PCR product of Cdh1 was cloned into pBluescript plasmid by double digestion with restriction endonucleases EcoR1 and Xba1, and ligation. Based on site-directed mutagenesis, the pBluescript-Cdh1 plasmid containing Cdh1 coding sequence was used as a template. The 40, 151, 163 serine (S) and 121 threonine (T) in Cdh1 gene was mutated to alanine (A) by multiple PCR with four pairs of mutated primers. The mutated Cdh1 vector was identified by DNA sequencing.
RESULTS AND CONCLUSION: The PCR product was about 1 500 bp by electrophoresis, including the entire coding sequence of Cdh1, restriction sites at both ends of Cdh1 and KOZAK sequence. The recombinant pBluescript-Cdh1 plasmid was identified by digestion with restriction endonuclease EcoR1 and Xba1, which was consistent with the expected results. DNA sequencing showed that A at the 930th base of Cdh1 (BC162059.1)   coding sequence was mutated to G in the recombinant plasmid of pBluescript-Cdh1. But the sequence of amino acids was not affected. The 40, 121, 151, 163 amino acids in pBluescript-Cdh1-4A40, 121, 151, 163 mutant plasmids were all mutated to alanine. The mutated Cdh1 gene expressing plasmid at phosphorylation site was successfully constructed, which provides a good foundation for further studies of Cdh1 gene function.

Key words: tissue construction, cytological experiments of tissue construction, anaphase promoting complex, Cdh1, site-directed mutagenesis, PCR, eukaryotic expression plasmid, nervous system, development, nerve repair, gene therapy, National Natural Science Foundation of China

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