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

ABSTRACT: 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?Å. Specifically, the crystal belonged to space group P212121, with unit-cell parameters a = 73.3, b = 78.12, c = 106.18?Å. Matthews coefficient calculations indicated that the crystal may contain six TsiV3 molecules in one asymmetric unit, with a VM value of 2.25?Å(3)?Da(-1) and a solvent content of 45.42%.

SUBMITTER: Zhang J 

PROVIDER: S-EPMC3944696 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature