Structural basis of Na(+)-independent and cooperative substrate/product antiport in CaiT.

Abstract

Transport of solutes across biological membranes is performed by specialized secondary transport proteins in the lipid bilayer, and is essential for life. Here we report the structures of the sodium-independent carnitine/butyrobetaine antiporter CaiT from Proteus mirabilis (PmCaiT) at 2.3-A and from Escherichia coli (EcCaiT) at 3.5-A resolution. CaiT… (More)
DOI: 10.1038/nature09310

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