高通量测序技术的发展为研究者深入探索微生物世界提供可能。随着以Pacific Bio Sciences(PacBio)公司的单分子实时测序(Single molecule real time sequencing,SMRT)为代表的第三代测序(Third generation sequencing,TGS)技术逐渐发展...高通量测序技术的发展为研究者深入探索微生物世界提供可能。随着以Pacific Bio Sciences(PacBio)公司的单分子实时测序(Single molecule real time sequencing,SMRT)为代表的第三代测序(Third generation sequencing,TGS)技术逐渐发展成熟,微生物研究方法正面临又一次新的变革。SMRT测序技术凭借其特殊建库方式(SMRTbell)和超长的测序读长等特点,为微生物16S rRNA基因全长测序提供新的选择。同时,为组装完整可靠的宏基因组和微生物全基因组提供新方法。随着PacBio测序平台的成本大幅下降,SMRT测序技术的PacBio系列平台开始逐渐被应用于微生物16S rRNA基因测序、宏基因组测序和全基因组测序研究中。综述了SMRT测序技术的技术原理和特点及其在微生物16S rRNA基因全长测序、宏基因组测序等方面的应用,并分析了目前SMRT测序技术在微生物各方面研究中的优势和存在的问题,提出基于SMRT测序技术获得的长片段在后期分析中存在的问题。SMRT测序技术将越来越多地引入到微生物研究中,期望为将要选择使用SMRT测序技术研究微生物的研究人员提供一定参考。展开更多
Cobetia marina is a model proteobacteria in researches on marine biofouling. Its taxonomic nomenclature has been revised many times over the past few decades. To better understand the role of the surface-associated li...Cobetia marina is a model proteobacteria in researches on marine biofouling. Its taxonomic nomenclature has been revised many times over the past few decades. To better understand the role of the surface-associated lifestyle of C. marina and the phylogeny of the family Halomonadaceae, we sequenced the entire genome of C. marina JCM 21022T using single molecule real-time sequencing technology （SMRT） and performed comparative genomics and phylogenomics analyses. The circular chromosome was 4 176 300 bp with an average GC content of 62.44% and contained 3 611 predicted coding sequences, 72 tRNA genes, and 21 rRNA genes. The C. marina JCM 2102U genome contained a set of crucial genes involved in surface colonization processes. The comparative genome analysis indicated the significant differences between C. marina JCM 21022T and Cobetia amphilecti KMM 296 （formerly named C. marina KMM 296） resulted from sequence insertions or deletions and chromosomal recombination. Despite these differences, pan and core genome analysis showed similar gene functions between the two strains. The phylogenomic study of the family Halomonadaceae is relationships were well resolved among every genera Cobetia, Kushneria, Zymobacter, and Halotalea. reported here for the first time. We found that the tested, including Chromohalobacter, Halomonas,展开更多
文摘高通量测序技术的发展为研究者深入探索微生物世界提供可能。随着以Pacific Bio Sciences(PacBio)公司的单分子实时测序(Single molecule real time sequencing,SMRT)为代表的第三代测序(Third generation sequencing,TGS)技术逐渐发展成熟,微生物研究方法正面临又一次新的变革。SMRT测序技术凭借其特殊建库方式(SMRTbell)和超长的测序读长等特点,为微生物16S rRNA基因全长测序提供新的选择。同时,为组装完整可靠的宏基因组和微生物全基因组提供新方法。随着PacBio测序平台的成本大幅下降,SMRT测序技术的PacBio系列平台开始逐渐被应用于微生物16S rRNA基因测序、宏基因组测序和全基因组测序研究中。综述了SMRT测序技术的技术原理和特点及其在微生物16S rRNA基因全长测序、宏基因组测序等方面的应用,并分析了目前SMRT测序技术在微生物各方面研究中的优势和存在的问题,提出基于SMRT测序技术获得的长片段在后期分析中存在的问题。SMRT测序技术将越来越多地引入到微生物研究中,期望为将要选择使用SMRT测序技术研究微生物的研究人员提供一定参考。
基金Supported by the National Natural Science Foundation of China(Nos.41006082,31372517)
文摘Cobetia marina is a model proteobacteria in researches on marine biofouling. Its taxonomic nomenclature has been revised many times over the past few decades. To better understand the role of the surface-associated lifestyle of C. marina and the phylogeny of the family Halomonadaceae, we sequenced the entire genome of C. marina JCM 21022T using single molecule real-time sequencing technology （SMRT） and performed comparative genomics and phylogenomics analyses. The circular chromosome was 4 176 300 bp with an average GC content of 62.44% and contained 3 611 predicted coding sequences, 72 tRNA genes, and 21 rRNA genes. The C. marina JCM 2102U genome contained a set of crucial genes involved in surface colonization processes. The comparative genome analysis indicated the significant differences between C. marina JCM 21022T and Cobetia amphilecti KMM 296 （formerly named C. marina KMM 296） resulted from sequence insertions or deletions and chromosomal recombination. Despite these differences, pan and core genome analysis showed similar gene functions between the two strains. The phylogenomic study of the family Halomonadaceae is relationships were well resolved among every genera Cobetia, Kushneria, Zymobacter, and Halotalea. reported here for the first time. We found that the tested, including Chromohalobacter, Halomonas,
