分枝杆菌Ⅶ型分泌系统的研究进展

Type Ⅶ secretion system in Mycobacteria

Ⅶ型分泌系统是近年来新发现的一种新型、特殊的分泌系统,最先在结核分枝杆菌中发现.Ⅶ型分泌系统负责分枝杆菌的毒力蛋白分泌,介导分枝杆菌与宿主间发生相互作用,并参与分枝杆菌体内锌铁平衡等,在分枝杆菌的生长代谢及致病过程中发挥重要作用.本文从Ⅶ型分泌系统的基因组成与类型、分泌底物、转运机制及其与菌株致病性的关系等方面,对分枝杆菌Ⅶ型分泌系统的研究进展进行简要综述,为发展用于疾病诊断、治疗和预防的新策略提供依据.

Type Ⅶ secretion system（T7SS） is a novel and specialized secretion system discovered in recent years. It was first found in Mycobacterium tuberculosis. Type Ⅶ secretion system is involved in the secretion of virulence-associated proteins, the interaction between pathogens and hosts and the balance of zinc/iron ions. Moreover,it plays a critical role in the growth and pathogenesis of Mycobacteria. This review summarizes the components,substrates and translocation mechanisms of the type Ⅶ secretion system and its relation to the virulence of Mycobacteria aiming to provide references for developing novel strategies for disea-ses diagnosis,treatment and prevention.