本研究从陆地棉耐盐品种中9 409中克隆得到线粒体基因rps12(ribosomal protein S12,30S核糖体蛋白S12),并对该基因进行生物信息学、实时荧光定量PCR和原核表达分析。结果表明:陆地棉线粒体基因rps12的ORF全长为372 bp,编码123个氨基酸,...本研究从陆地棉耐盐品种中9 409中克隆得到线粒体基因rps12(ribosomal protein S12,30S核糖体蛋白S12),并对该基因进行生物信息学、实时荧光定量PCR和原核表达分析。结果表明:陆地棉线粒体基因rps12的ORF全长为372 bp,编码123个氨基酸,分子量约为14.102 k D,等点电为11.11。rps12基因的表达具有组织特异性,且受盐胁迫诱导。另外,在大肠杆菌BL21中,重组原核表达质粒p ET28a-rps12可经IPTG诱导表达。研究结果为今后进一步研究陆地棉线粒体基因rps12的功能和应用奠定了分子生物学基础。展开更多
[Objective] The study aimed to analyze the ITS sequences of nrDNA from Rhodiola alisa and investigate the difference of evolution rate between nrDNA and trnS-trnG and rpl20-rps12 sequences of cpDNA(chloroplast DNA).[M...[Objective] The study aimed to analyze the ITS sequences of nrDNA from Rhodiola alisa and investigate the difference of evolution rate between nrDNA and trnS-trnG and rpl20-rps12 sequences of cpDNA(chloroplast DNA).[Method]Total DNA was extracted from silica-dried leaves of R.alsia by using modified CTAB method.With the extracted DNA sample as template,nrDNA ITS region was amplified,then purified and sequenced.In addition,the yielded ITS sequences were also compared with the known trnS-trnG and rpl20-rps12 sequences of cpDNA from R.alsia.[Result]The ITS sequence of nrDNA from R.alsia was 701 bp in length,of which 13 variable sites were found with a percentage of 1.85%.Of the 13 variable sites,8 were caused by point mutations,5 were the results of insertions or deletions.The(A+T)content and(G+C)content were 46.9% and 53.1%,respectively.The nucleotide diversity(π)was 0.004 27.[Conclusion]The ITS region of nrDNA from R.alsia was more conservative and evolved more slowly than the trnS-trnG and rpl20-rps12 sequences of its cpDNA.展开更多
文摘本研究从陆地棉耐盐品种中9 409中克隆得到线粒体基因rps12(ribosomal protein S12,30S核糖体蛋白S12),并对该基因进行生物信息学、实时荧光定量PCR和原核表达分析。结果表明:陆地棉线粒体基因rps12的ORF全长为372 bp,编码123个氨基酸,分子量约为14.102 k D,等点电为11.11。rps12基因的表达具有组织特异性,且受盐胁迫诱导。另外,在大肠杆菌BL21中,重组原核表达质粒p ET28a-rps12可经IPTG诱导表达。研究结果为今后进一步研究陆地棉线粒体基因rps12的功能和应用奠定了分子生物学基础。
基金Supported by National Natural Science Foundation of China(30170066,30370284)National Basic Research Program of China(2008CB117013)International Foundation for Science(IFSD4258-1)~~
文摘[Objective] The study aimed to analyze the ITS sequences of nrDNA from Rhodiola alisa and investigate the difference of evolution rate between nrDNA and trnS-trnG and rpl20-rps12 sequences of cpDNA(chloroplast DNA).[Method]Total DNA was extracted from silica-dried leaves of R.alsia by using modified CTAB method.With the extracted DNA sample as template,nrDNA ITS region was amplified,then purified and sequenced.In addition,the yielded ITS sequences were also compared with the known trnS-trnG and rpl20-rps12 sequences of cpDNA from R.alsia.[Result]The ITS sequence of nrDNA from R.alsia was 701 bp in length,of which 13 variable sites were found with a percentage of 1.85%.Of the 13 variable sites,8 were caused by point mutations,5 were the results of insertions or deletions.The(A+T)content and(G+C)content were 46.9% and 53.1%,respectively.The nucleotide diversity(π)was 0.004 27.[Conclusion]The ITS region of nrDNA from R.alsia was more conservative and evolved more slowly than the trnS-trnG and rpl20-rps12 sequences of its cpDNA.
