FIGURE 6.

Model for intracellular distribution of iron between protein targets, in iron-deprived cells supplied with ferric chrysobactin. See text for details. This model is built on the basis of published data on ferric chrysobactin processing (43), Suf protein-protein interactions during iron-sulfur cluster assembly (51), and bacterioferredoxin redox catalyst function (34, 52). The dashed line arrows indicate possible routes of iron trafficking between target proteins. The solid line arrow indicates the role of SufC in the formation of iron-sulfur proteins. The possible involvement of additional iron trafficking proteins is not depicted.