Siderophore transport through Escherichia coli outer membrane receptor FhuA with disulfide-tethered cork and barrel domains.

Abstract excerpt

The hydroxamate siderophore receptor FhuA is a TonB-dependent outer membrane protein of Escherichia coli composed of a C-terminal 22-stranded beta-barrel occluded by an N-terminal globular cork domain. During siderophore transport into the periplasm, the FhuA cork domain has been proposed to undergo conformational changes that allow transport through the barrel lumen; alternatively, the cork may be completely...

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