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慢生型大豆根瘤菌染色体的16kb EcoRⅠ DNA片段的亚克隆测序分析
引用本文:唐咸来,吕安国,武波,柏学亮,唐东阶,唐纪良,马庆生.慢生型大豆根瘤菌染色体的16kb EcoRⅠ DNA片段的亚克隆测序分析[J].广西大学学报(自然科学版),2001,26(2):150-155,158.
作者姓名:唐咸来  吕安国  武波  柏学亮  唐东阶  唐纪良  马庆生
作者单位:1. 中国科学院沈阳应用生态研究所,
2. 广西大学农业部
基金项目:国家高技术“863”计划(863-101-03-03-01)
摘    要:亚克隆测序分析发现,在Bradyrhizobium japonicum的GX201菌株染色体的16kb EcoR I DNA区段上含有一个与putA基因同源的基因的ORF 3054(Open Reading Frame),该基因ORF长3054bp,在核苷酸水平上与已报道的putA基因有94%一致性,其推断性的编码产物在氨基酸水平上与putA编码产物脯氨酸脱氢酶(ProDH)有95%一致性,利用Tn5gusA5诱变的方法获得了该同源基因的标记置换突变体,该突变体在液体培养基(YMA)中的生长速率比野生菌株慢。

关 键 词:B.Japonicum  PutA基因  同源性  慢生型大豆根瘤菌  染色体  亚克隆  测序
文章编号:1001-7445(2001)02-0150-06
修稿时间:2001年2月15日

Subcloning and sequencing analysis of a 16 kb EcoRⅠ DNA fragment of the chromosome of Bradyrhizobium japonicum
TANG Xian-lai,Lü An-guo,WU Bo,BAI Xue-liang,TANG Dong-jie,TANG Ji-liang,MA Qing-sheng.Subcloning and sequencing analysis of a 16 kb EcoRⅠ DNA fragment of the chromosome of Bradyrhizobium japonicum[J].Journal of Guangxi University(Natural Science Edition),2001,26(2):150-155,158.
Authors:TANG Xian-lai  Lü An-guo  WU Bo  BAI Xue-liang  TANG Dong-jie  TANG Ji-liang  MA Qing-sheng
Abstract:The results of the subcloning and sequencing analysis showed that there is a perfect ORF3054 (Open Reading Frame) homologus with the putA gene in the 16kb EcoRⅠ DNA fragment cloned from the chromosome of Bradyrhizobium japonicum GX201,the length of which was 3054 base pairs.It shared 94% identity with the DNA of the putA gene at the nucleotide level,and its putative product protein showed 95% identity with the proline dehydrogenase (ProDH) encoded by putA gene at amino acid level.When cultured in the liquid medium YMA,the growth ratio of the markerexchanger mutant of this homologous gene was lower than that of the wildtype strain.
Keywords:B  japonicum  put  A gene  Homology  
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