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The type IV secretion system core component VirB8 interacts via the β1‐strand with VirB10
Author(s) -
Sharifahmadian Mahzad,
Nlend Ingrid U.,
Lecoq Lauriane,
Omichinski James G.,
Baron Christian
Publication year - 2017
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1002/1873-3468.12770
Subject(s) - secretion , chemistry , microbiology and biotechnology , biology , biochemistry
In this work, we provide evidence for the interactions between VirB8 and VirB10, two core components of the type IV secretion system (T4SS). Using nuclear magnetic resonance experiments, we identified residues on the β1‐strand of Brucella VirB8 that undergo chemical shift changes in the presence of VirB10. Bacterial two‐hybrid experiments confirm the importance of the β1‐strand, whereas phage display experiments suggest that the α2‐helix of VirB8 may also contribute to the interaction with VirB10. Conjugation assays using the VirB8 homolog TraE as a model show that several residues on the β1‐strand of TraE are important for T4SS function. Together, our results suggest that the β1‐strand of VirB8‐like proteins is essential for their interaction with VirB10 in the T4SS complex.