您好，欢迎访问北京市农林科学院 机构知识库！
北京市农林科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

A Re-evaluation of the Taxonomy and Classification of the Type III Secretion System in a Pathogenic Bacterium Causing Soft Rot Disease of Pleurotus eryngii

文献类型： 外文期刊

作者： Xu, Feng 1 ; Yan, Hui 2 ; Liu, Yu 1 ; Zhao, Shuang 1 ; Song, Shuang 1 ; Gu, Tongtong 1 ; Song, Zhongjuan 1 ; Xie, Jianbo; 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant & Environm Protect, Beijing Engn Res Ctr Edible Mushroom, Beijing 100097, Peoples R China

2.Hebei Agr Univ, Coll Anim Sci & Technol, Baoding 071001, Peoples R China

3.Beijing Forestry Univ, Coll Biol Sci & Technol, Natl Engn Lab Tree Breeding, Beijing 100083, Peoples R China

期刊名称：CURRENT MICROBIOLOGY （ 影响因子：2.188； 五年影响因子：2.197 ）

ISSN： 0343-8651

年卷期：

页码：

收录情况： SCI

摘要： Pantoea beijingensis, a gram-negative pathogenic bacterium, causes soft rot disease in the fungus Pleurotus eryngii in China. However, the taxonomic classification of this pathogen is controversial due to close relationships between bacteria of the genera Pantoea and Erwinia. This study aimed to resolve the identity of P. beijingensis using phylogenomic and systematic analyses of Pantoea and Erwinia by whole-genome sequencing. Single-copy orthologs identified from the Erwinia/Pantoea core genomes were used to delineate Erwinia/Pantoea phylogeny. P. beijingensis LMG27579(T) clustered within a single Erwinia clade. A whole-genome-based phylogenetic tree and average nucleotide and amino-acid identity values indicate that P. beijingensis LMG27579(T) should be renamed Erwinia beijingensis. The hrp/hrc genes encoding type III secretion system (T3SS) proteins in Erwinia and Pantoea were divided into five groups according to gene contents and organization. Neighbor-joining-inferred phylogenetic trees based on concatenated HrcU, HrcN, and HrcR in the main hrp/hrc cluster showed that E. beijingensis T3SS proteins are closely related to those in Ewingella americana, implying that E. beijingensis and E. americana have a recent common hrp/hrc gene ancestor. Furthermore, T3SS proteins of Erwinia and Pantoea were clustered in different clades separated by other bacterial T3SS proteins. Thus, T3SS genes in Pantoea and Erwinia strains might have been acquired by horizontal gene transfer. Overall, our findings clarify the taxonomy of the bacterium causing soft rot in P. eryngii, as well as the genetic structure and classification of the hrp/hrc T3SS virulence factor. We propose that T3SS acquisition is important for E. beijingensis emergence and pathogenesis.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：北京市农林科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台