The lspc3-41i restriction-modification system is the major determinant for genetic manipulations of lysinibacillus sphaericus c3-41 | |
Fu, Pan1,2; Ge, Yong1; Wu, Yiming1; Zhao, Ni1; Yuan, Zhiming1; Hu, Xiaomin1 | |
刊名 | Bmc microbiology |
2017-05-19 | |
卷号 | 17页码:8 |
关键词 | Lysinibacillus sphaericus R-m systems Cfe Methylation Lspc3-41i |
ISSN号 | 1471-2180 |
DOI | 10.1186/s12866-017-1014-6 |
通讯作者 | Yuan, zhiming(yzm@wh.iov.cn) ; Hu, xiaomin(huxm@wh.iov.cn) |
英文摘要 | Background: lysinibacillus sphaericus has been widely used in integrated mosquito control program and it is one of the minority bacterial species unable to metabolize carbohydrates. in consideration of the high genetic conservation at genomic level and difficulty of genetic horizontal transfer, it is hypothesized that effective restriction-modification (r-m) systems existed in mosquitocidal l. sphaericus. results: in this study, six type ii r-m systems including lspc3-41i were predicted in l. sphaericus c3-41 genome. it was found that the cell free extracts (cfe) from this strain shown similar restriction and methylation activity on exogenous bacillus/escherichia coli shuttle vector pbu4 as the haeiii, which is an isoschizomer of bspri. the bsph_0498 (encoding the predicted lspc3-41ir) knockout mutant delta 0498 and the complement strain rc0498 were constructed. it was found that the unmethylated pbu4 can be digested by the cfe of c3-41 and rc0498, but not by that of delta 0498. furthermore, the exogenous plasmid pbu4 can be transformed at very high efficacy into delta 0498, low efficacy into rc0498, but no transformation into c3-41, indicating that lspc3-41i might be a major determinant for the genetic restriction barrier of strain c3-41. besides, lspc3-41ir and lspc3-41im genes are detected in other two strains besides c3-41 of the tested 16 l. sphaericus strains, which all belonging to serotype h5 and mlst sequence type (st) 1. furthermore, the three strains are not horizontal transferred, and this restriction could be overcome by in vitro methylation either by the host cfe or by commercial methytransferase m. haeiii. the results provide an insight to further study the genetic restriction, modification and evolution of mosquitocidal l. sphaericus, also a theoretical basis and a method for the genetic manipulations of l. sphaericus. conclusions: lspc3-41i is identified as the major determinant for the restriction barrier of l. sphaericus c3-41. only three strains of the tested 16 l. sphaericus strains, which all belonging to serotype h5 and st1 by mlst scheme, contain lspc3-41i system. two different methods can be used to overcome the restriction barrier of the three isolates to get transformants efficiently: 1) to methylate plasmid dna prior to the electroporation; and 2) to delete the major restriction endonuclease encoding gene lspc3-41ir. |
WOS关键词 | BACILLUS-SPHAERICUS ; CULEX-QUINQUEFASCIATUS ; DNA METHYLTRANSFERASES ; BINARY TOXIN ; ESCHERICHIA-COLI ; RESISTANCE ; MECHANISM ; STRAINS ; BACTERIOPHAGE ; ENDONUCLEASES |
WOS研究方向 | Microbiology |
WOS类目 | Microbiology |
语种 | 英语 |
出版者 | BIOMED CENTRAL LTD |
WOS记录号 | WOS:000401565500001 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2373436 |
专题 | 武汉病毒研究所 |
通讯作者 | Yuan, Zhiming; Hu, Xiaomin |
作者单位 | 1.Chinese Acad Sci, Wuhan Inst Virol, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
推荐引用方式 GB/T 7714 | Fu, Pan,Ge, Yong,Wu, Yiming,et al. The lspc3-41i restriction-modification system is the major determinant for genetic manipulations of lysinibacillus sphaericus c3-41[J]. Bmc microbiology,2017,17:8. |
APA | Fu, Pan,Ge, Yong,Wu, Yiming,Zhao, Ni,Yuan, Zhiming,&Hu, Xiaomin.(2017).The lspc3-41i restriction-modification system is the major determinant for genetic manipulations of lysinibacillus sphaericus c3-41.Bmc microbiology,17,8. |
MLA | Fu, Pan,et al."The lspc3-41i restriction-modification system is the major determinant for genetic manipulations of lysinibacillus sphaericus c3-41".Bmc microbiology 17(2017):8. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论