Structure of Salmonella FlhE, conserved member of a flagellar type III secretion operon.
Department of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA.
Department of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA. Electronic address: [email protected]
- Published Article
Journal of Molecular Biology
- Publication Date
Mar 27, 2015
6 Pt B
The bacterial flagellum is assembled by a multicomponent transport apparatus categorized as a type III secretion system. The secretion of proteins that assemble into the flagellum is driven by the proton motive force. The periplasmic protein FlhE is a member of the flhBAE operon in the majority of bacteria where FlhE is found. FlhA and FlhB are established components of the flagellar type III secretion system. The absence of FlhE results in a proton leak through the flagellar system, inappropriate secretion patterns, and cell death, indicating that FlhE regulates an important aspect of proper flagellar biosynthesis. We isolated FlhE from the periplasm of Salmonella and solved its structure to 1.5Å resolution. The structure reveals a β-sandwich fold, with no close structural homologs. Possible roles of FlhE, including that of a chaperone, are discussed. Copyright © 2014 Elsevier Ltd. All rights reserved.
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The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/25545591