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Functions of the siderophore esterases IroD and IroE in iron-salmochelin utilization, by M. Zhu, M. Valdebenito, G. Winkelmann and K. Hantke

Microbiology vol. 151, part 7, pp. 2363 - 2372

Supplementary Figures 1-7. [ PDF file ] (261kb)

Fig. S1. SDS-PAGE gels of the purified NHis-IroD fusion protein, the MalE-IroE fusion protein and the MalE-PfeE fusion protein.

Fig. S2. Cleavage of salmochelin S2 by NHis-IroD.

Fig. S3. Substrates that were not cleaved by MalE-IroE: Ga³⁺-salmochelin S4, Ga³⁺-enterobactin. Substrates that were not cleaved by NHis-IroD: Fe³⁺-enterobactin, Ga³⁺-salmochelin S4, Fe³⁺-salmochelin S4, salmochelin S0.

Fig. S4. Cleavage of Fe³⁺-salmochelin S4 by NHis-IroD in the presence of 2 mM ferrozine.

Fig. S5. Cleavage of enterobactin by NHis-IroD to the linear oligomers 2,3-dihydroxybenzoylserine.

Fig. S6. Cleavage of salmochelin S4 by MalE-PfeE from P. aeruginosa.

Fig. S7. Cleavage of Fe³⁺-salmochelin S4 by MalE-PfeE from P. aeruginosa.

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