Crystallization and preliminary X-ray study of TsiV3 from Vibrio cholerae

The bacterial type VI secretion system (T6SS), a dynamic organelle, participates in microbial competition by transporting toxic effector molecules to neighbouring cells to kill competitors. TsiV3, a recently defined T6SS immunity protein in Vibrio cholerae, possesses self-protection against killing by T6SS predatory cells by directly binding to and inhibiting their effector protein VgrG-3. Structural information about TsiV3 could help to illuminate its specific mechanism. In this study, TsiV3 from V. cholerae was cloned, expressed and crystallized and single-crystal X-ray diffraction data sets were collected to a resolution of 2.55 angstrom. Specifically, the crystal belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 73.3, b = 78.12, c = 106.18 angstrom. Matthews coefficient calculations indicated that the crystal may contain six TsiV3 molecules in one asymmetric unit, with a V-M value of 2.25 angstrom(3) Da(-1) and a solvent content of 45.42%.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000332405600012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Biochemical Research MethodsBiochemistry & Molecular BiologyBiophysicsCrystallographySCI(E)PubMed0ARTICLEdongcheng@ihep.ac.cn; dongyh@ihep.ac.cnPt 3335-3387