This family of proteins includes the type VI secretion system (T6SS) immunity protein TsiT from Pseudomonas aeruginosa (Swiss:Q9HXA5) and similar proteins mainly found in proteobacteria. TsiT, which belongs to the Imm52 family, can suppress the virul ...
This family of proteins includes the type VI secretion system (T6SS) immunity protein TsiT from Pseudomonas aeruginosa (Swiss:Q9HXA5) and similar proteins mainly found in proteobacteria. TsiT, which belongs to the Imm52 family, can suppress the virulence of TseT [2]. This protein adopts a beta-sandwich fold with nine alpha-helices and an eight-stranded antiparallel central beta-sheet. It has a large electro-negative pocket with hydrophobic surroundings that play a role in the interaction with TseT [3,4]. Proteins containing this domain are present in bacterial polymorphic toxin systems as an immediate gene neighbour of the toxin gene, usually containing a domain of the Tox-REase-5 family [1].