Functional characterisation of two ferric-ion coordination modes of TtFbpA, the periplasmic subunit of an ABC-type iron transporter from Thermus thermophilus HB8

The ferric ion binding protein A of Thermus thermophilus HB8 (TtFbpA) is the periplasmic subunit of an ABC-type iron transporter. Two Fe3+-bound crystal structures at pH 5.5 and pH 7.5 and one apo structure have been reported for TtFbpA. In addition to three Tyr residues, TtFbpA coordinates with Fe3...

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