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fbook

银虫 (小有名气)

[交流] 生物学四句翻译

以牛的抗菌肽(Indolicidin)氨基酸序列为模板,在多肽C端添加Kallikrein蛋白酶切位点设计出新的抗菌肽NK-16检测出抗菌活性。根据氨基酸序列和E.coli偏爱密码子,反向翻译设计并合成四个重叠基因片段,在5’端和3’端分别导入用于表达载体构建的限制性内切位点Xho I和Nco I。利用Overlapping PCR技术,连接合成片段,将连接好的核苷酸序列克隆入pET 30a(+)载体中构建多重载体PET30a(+)-NK-16,经双酶切和PCR鉴定表明多重表达载体PET30a(+)-NK-16构建成功。多重表达载体PET30a(+)-NK-16的正确构建,为抗菌肽的原核高效表达奠定了基础。
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ringzhu

木虫 (职业作家)


fbook(金币+100, 翻译EPI+1): 2010-09-30 18:04:39
To detect antimicrobial activity,we take amino acid sequence of Bovine antimicrobial peptide (Indolicidin)  as a template, adding Kallikrein protease cleavage sites to the C terminal of peptide to get new antimicrobial peptide NK-16.
Based on amino acid sequence and E.coli preferred codons,four overlapping fragments were backward translated ,designed and synthesized.
The restriction sites Xho I and Nco I which were used to express the contructino of vector were introduced onto 5 'and 3'terminal.
Overlapping PCR technique was used to  connect synthetic fragment and made the connected nucleotide sequence cloned into pET 30a (+) vector to construct multi-carrier PET30a (+)-NK-16.the multiple expression vector PET30a (+)-NK-16 was proved to be constructed successfully by the identification by Double digestion and PCR. the right construction of multiple expression vector PET30a (+)-NK-16 lay the groundwork for the highl expression of prokaryotic antimicrobial peptides.
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