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Position: Home > Articles > Expression of amylase gene from Bacillus subtilis in transformed Escherichia coli Animal Husbandry & Veterinary Medicine 2005,37 (6) 7-9

枯草杆菌的淀粉酶基因在大肠杆菌中的表达

作  者:
尹清强;韩彪;郑秋红;康相涛
单  位:
河南农业大学牧医工程学院
关键词:
淀粉酶基因;转基因;大肠杆菌;枯草杆菌
摘  要:
根据枯草杆菌(Bacillus subtilis)基因文库中的淀粉酶基因的碱基序列,设计引物。以枯草杆菌菌体DNA为模板,利用PCR扩增出分子量大约为2.3 kb的淀粉酶基因片段。借助于核酸内切酶和连接酶把该基因植入到pHMSXD1质粒中,构建pHMSXD2质粒载体。通过高压电击处理把载体植入到大肠杆菌(JM10)中并成功表达。该株大肠杆菌在酶基因表达后,其淀粉酶活力达到1.037 6 U/mL(LB培养液)和1.361 0 U/mL(矿物元素培养液),分别比原始的枯草杆菌的淀粉酶活力提高了46倍和286倍。
译  名:
Expression of amylase gene from Bacillus subtilis in transformed Escherichia coli
作  者:
YIN Qing-qiang,HAN Biao,ZHENG Qiu-hong,HANG Xiang-tao(Department of Animal Science, Henan Agricultural University, Zhengzhou 450002, China)
关键词:
[WT]amylase gene;transformation;Escherichia coli;Bacillus subtilis
摘  要:
Amylase gene (2.3 kb) form Bacillus subtilis was amplified by polymerase chain reaction (PCR). After the amylase genes were connected with a plasmid (pHMSXD1) and transformed into Escherichia coli (E.coli) by electroporation,the transformed E.coli could express and secret amylase. Compared with the original B.subtilis, the amylase activitives from transformed E.coli were 1.037 6 U/mL in LB medium and 1.361 0 U/mL in a special mineral medium, which were increased by 46 and 286 folds, respectively.

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