Higher levels of acetaldehyde in beer are one of the major concerns in the current beer industry.Yeast produces acetaldehyde during alcoholic fermentation,and its modification significantly affects beer flavor and qua...Higher levels of acetaldehyde in beer are one of the major concerns in the current beer industry.Yeast produces acetaldehyde during alcoholic fermentation,and its modification significantly affects beer flavor and quality.A different mutant strain with lower acetaldehyde production and improved ethanol tolerance was constructed using the ARTP-ALE mutagenesis strategy with 4-methylpyrazole-disulfiram.As a result of the mutation,the alcohol dehydrogenase activity of the mutant strain decreased to about 71.22%of that of the wild-type strain.At the same time,the fermentation properties and genetic stability of the newly screened strain showed slight differences from the wild-type strain,and there were no safety concerns regarding industrial use of the mutant strain.展开更多
克隆新城疫病毒中等毒力株Anhinga(Anh)的血凝素-神经氨酸酶(HN)基因,用生物信息学软件分析其编码蛋白结构与功能的差异。根据已知的HN基因序列,通过Primer Premier 5.0设计引物,提取新城疫病毒总RNA,反转录成cDNA,PCR扩增HN基因,并将...克隆新城疫病毒中等毒力株Anhinga(Anh)的血凝素-神经氨酸酶(HN)基因,用生物信息学软件分析其编码蛋白结构与功能的差异。根据已知的HN基因序列,通过Primer Premier 5.0设计引物,提取新城疫病毒总RNA,反转录成cDNA,PCR扩增HN基因,并将其连接到T载体上进行测序比对;用DNAman、DNAstar、MEGA7.0及在线分析预测软件对HN基因编码的蛋白进行生物信息学分析。结果显示,HN基因全长为1716 bp,与预期基因序列同源性达99.77%。其基本理化性质为亲水性跨膜蛋白,无信号肽序列,二级结构主要以无规则卷曲为主,属于神经氨酸酶CL21531超家族,三级结构与二级结构预测结果基本吻合,该蛋白存在多个潜在的B细胞表位。论文成功克隆并分析了HN基因所编码蛋白的主要特性及可能存在的抗原位点,为深入探究HN蛋白在NDV感染、增殖及抗肿瘤方面的作用奠定了基础。展开更多
基金Supported by Heilongjiang Natural Science Foundation Joint Guide Project(LH2019C022)。
文摘Higher levels of acetaldehyde in beer are one of the major concerns in the current beer industry.Yeast produces acetaldehyde during alcoholic fermentation,and its modification significantly affects beer flavor and quality.A different mutant strain with lower acetaldehyde production and improved ethanol tolerance was constructed using the ARTP-ALE mutagenesis strategy with 4-methylpyrazole-disulfiram.As a result of the mutation,the alcohol dehydrogenase activity of the mutant strain decreased to about 71.22%of that of the wild-type strain.At the same time,the fermentation properties and genetic stability of the newly screened strain showed slight differences from the wild-type strain,and there were no safety concerns regarding industrial use of the mutant strain.
文摘克隆新城疫病毒中等毒力株Anhinga(Anh)的血凝素-神经氨酸酶(HN)基因,用生物信息学软件分析其编码蛋白结构与功能的差异。根据已知的HN基因序列,通过Primer Premier 5.0设计引物,提取新城疫病毒总RNA,反转录成cDNA,PCR扩增HN基因,并将其连接到T载体上进行测序比对;用DNAman、DNAstar、MEGA7.0及在线分析预测软件对HN基因编码的蛋白进行生物信息学分析。结果显示,HN基因全长为1716 bp,与预期基因序列同源性达99.77%。其基本理化性质为亲水性跨膜蛋白,无信号肽序列,二级结构主要以无规则卷曲为主,属于神经氨酸酶CL21531超家族,三级结构与二级结构预测结果基本吻合,该蛋白存在多个潜在的B细胞表位。论文成功克隆并分析了HN基因所编码蛋白的主要特性及可能存在的抗原位点,为深入探究HN蛋白在NDV感染、增殖及抗肿瘤方面的作用奠定了基础。