别样玫瑰变色杆菌(Aliiroseovarius sp.)Z3基因组测序及比较基因组分析  

Draft genome sequence and comparative genome analysis of Alliroseovarius sp.Z3

作　　者：刘巍 郭海朋 董鹏生 燕孟琛 张德民[1,2] LIU Wei;GUO Haipeng;DONG Pengsheng;YAN Mengchen;ZHANG Demin(State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Ningbo University,Ningbo 315800,China;School of Marine Sciences,Ningbo University,Ningbo 315800,China)

机构地区：[1]宁波大学,农产品质量安全危害因子与风险防控国家重点实验室,浙江宁波315800 [2]宁波大学海洋学院,浙江宁波315800

出　　处：《热带海洋学报》2022年第1期52-61,共10页Journal of Tropical Oceanography

基　　金：国家自然科学基金(31672658);浙江省教育厅一般项目(Y201839299);宁波市农业重大专项(2017C110001)。

摘　　要：菌株Z3是一株从凡纳滨对虾(Litopenaeus vannamei)肠道样品中分离出的细菌。本研究利用Illumina HiSeq测序平台对其进行了测序,用SOAPdenovo等软件进行基因组组装、系统发育分析、基因预测和功能注释,并与别样玫瑰变色杆菌属(Aliiroseovarius)已知的5个种的模式株进行了比较基因组分析。基因组注释结果显示,Z3基因组大小为3525503bp,GC(guanylate and cytidylic acid)含量为59.4%,预测包含3509个编码蛋白基因。通过16S rRNA基因全长序列比对、平均核苷酸一致性(ANI)、DNA-DNA杂交(DDH)和共线性分析发现,菌株Z3与Aliiroseovarius crassostreae CV919-312T的16S rRNA基因全长序列相似度最高,为98.20%,与Aliiroseovarius sediminilitoris DSM 29439T的DDH和ANI值最高,分别为26.80%和84.95%,属于Alliroseovarius属的新种,将其命名为Aliiroseovarius sp.Z3。经比较基因组分析发现,Aliiroseovarius sp.Z3与5个近缘的模式株细菌共享2005个直系同源核心基因簇;Z3拥有的413个独立基因经注释,主要与碳水化合物转运与代谢、氨基酸转运与代谢、复制、重组及修复等功能相关。功能注释发现Z3具有进行完整的反硝化途径的相关基因,其利用的可能是环境中的硝酸盐、亚硝酸盐等。本研究对Z3全基因序列的注释、功能和比较基因组的分析,不仅丰富了Aliiroseovarius属细菌基因组资源,还为深入研究其反硝化特性等提供了基础。Alliroseovarius sp.Z3 was isolated from guts of Litopenaeus vannamei.In the study,Illumina Hiseq sequencing platform was used for genome sequencing;then,the genome was assembled,annotated by software SOAPdenovo etc.,and compared with other five similar type strains.Genome annotation results showed that Z3 genome consists of 3525503 bp with a guanine-cytosine(GC)content of 59.4%,and 3509 protein-coding genes.The results of 16S rRNA sequence alignment,average nucleotide identity(ANI),DNA-DNA hybridization(DDH)and collinearity analysis showed that strain Z3 had the highest 16S rRNA similarity with Aliiroseovarius crassostreae CV919-312T,at 98.20%,and had the highest DDH and ANI values with Aliiroseovarius sediminilitoris DSM 29439T,at 26.80%and 84.95%,respectively.It was considered to be a new species of Alliroseovarius,and was named Aliiroseovarius sp.Z3.Comparative genomic analysis displayed that Aliiroseovarius sp.Z3 shared 2005 core orthologous gene clusters with other five similar type strains,and Z3 had 413 specific genes that are related to carbohydrate transport and metabolism,amino acid transport and metabolism,replication,recombination and repair,etc.After functional annotations,we found that Z3 possesses a complete denitrification pathway,indicating that Z3 can utilize nitrate and nitrite in the environment.These results related to the genome features and comparative genome of strain Z3 not only enrich the gene source of Aliiroseovarius genus,but also provide a molecular basis for studying its characteristics of denitrification.

关 键 词：对虾肠道 Aliiroseovarius sp.Z3 系统发育分析 反硝化 比较基因组 

分 类 号：P735.51[天文地球—海洋生物学]