Featured Species-Specific Loops Are Found in the Crystal Structure of Mhp Eno, a Cell Surface Adhesin From Mycoplasma hyopneumoniae
文献类型： 外文期刊
作者： Chen, Rong 1 ; Yu, Yanfei 1 ; Feng, Zhixin 1 ; Gan, Rong 2 ; Xie, Xing 1 ; Zhang, Zhenzhen 1 ; Xie, Qingyun 1 ; Wang, Wei 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Vet Med, Natl Ctr Engn Res Vet Bloprod, Minist Agr,Key Lab Vet Biol Engn & Technol, Nanjing, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Coll Vet Med, Nanjing, Jiangsu, Peoples R China
3.Nanjing Agr Univ, Coll Life Sci, Minist Agr, Key Lab Agr & Environm Microbiol, Nanjing, Jiangsu, Peoples R China
4.Nanjing Agr Univ, Coll Vet Med, OIE Reference Lab Swine Streptococcosis, Minist Agr,Key Lab Anim Bacteriol, Nanjing, Jiangsu, Peoples R China
5.Jiangsu Univ, Inst Life Sci, Zhenjiang, Jiangsu, Peoples R China
关键词： enolase; adhesin; Mycoplasma hyopneumoniae; plasminogen; structure
期刊名称：FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY （ 影响因子：5.293； 五年影响因子：5.882 ）
ISSN： 2235-2988
年卷期： 2019 年 9 卷
页码：
收录情况： SCI
摘要： Enolase is an evolutionarily conserved enzyme involved in the processes of glycolysis and gluconeogenesis. Mycoplasma hyopneumoniae belongs to Mycoplasma, whose species are wall-less and among the smallest self-replicating bacteria, and is an important colonizing respiratory pathogen in the pig industry worldwide. Mycoplasma hyopneumoniae enolase (Mhp Eno) expression is significantly increased after infection and was previously found to be a virulence factor candidate. Our studies show that Mhp Eno is a cell surface-localized protein that can adhere to swine tracheal epithelial cells (STECs). Adhesion to STECs can be specifically inhibited by an Mhp Eno antibody. Mhp Eno can recognize and interact with plasminogen with high affinity. Here, the first crystal structure of the mycoplasmal enolase from Mycoplasma hyopneumoniae was determined. The structure showed unique features of Mhp Eno in the S3/H1, H6/S6, H7/H8, and H13 regions. All of these regions were longer than those of other enolases and were exposed on the Mhp Eno surface, making them accessible to host molecules. These results show that Mhp Eno has specific structural characteristics and acts as a multifunctional adhesin on the Mycoplasma hyopneumoniae cell surface.
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