The Type II Secretory System Mediates Phage Infection in Vibrio cholerae

Frontiers in Cellular and Infection Microbiology

Jialiang Xu¹  Jingyun Zhang²  Zhe Li²  Yuanming Huang²  Biao Kan²  Zhenpeng Li²  Ming Liu²  Yufeng Fan²  Fenxia Fan²  Jie Li²  Huihui Sun³ 

[1] School of Light Industry, Beijing Technology and Business University, Beijing, China;State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China;State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China;National Institute of Environment Health, Chinese Center for Disease Control and Prevention, Beijing, China;

关键词: bacteriophage;    type II secretory system;    receptor;    EpsD;    Vibrio cholerae;   

DOI  :  10.3389/fcimb.2021.662344

来源: Frontiers

【 摘 要 】

Attachment and specific binding to the receptor on the host cell surface is the first step in the process of bacteriophage infection. The lytic phage VP2 is used in phage subtyping of the Vibrio cholerae biotype El Tor of the O1 serogroup; however, its infection mechanism is poorly understood. In this study, we aimed to identify its receptor on V. cholerae. The outer membrane protein EpsD in the type II secretory system (T2SS) was found to be related to VP2-specific adsorption to V. cholerae, and the T2SS inner membrane protein EpsM had a role in successful VP2 infection, although it was not related to adsorption of VP2. The tail fiber protein gp20 of VP2 directly interacts with EpsD. Therefore, we found that in V. cholerae, in addition to the roles of the T2SS as the transport apparatus of cholera toxin secretion and filamentous phage release, the T2SS is also used as the receptor for phage infection and probably as the channel for phage DNA injection. Our study expands the understanding of the roles of the T2SS in bacteria.

【 授权许可】

CC BY