Part of the ABC transporter complex FepBDGC involved in ferric enterobactin uptake (PubMed:3011753). Binds ferric enterobactin (PubMed:7551033, PubMed:10986237, PubMed:25173704). Can also bind ferric enantioenterobactin, the left-handed stereoisomer of the natural E.coli siderophore, and the apo-siderophore, enterobactin, but does not bind ferric agrobactin (PubMed:10986237). The complex is composed of two ATP-binding proteins (FepC), two transmembrane proteins (FepD and FepG) and a solute-binding protein (FepB). Expression is regulated by iron, via the regulatory protein Fur (PubMed:2529253, PubMed:2139473). Induced by hydroxyurea (PubMed:20005847). Belongs to the bacterial solute-binding protein 8 family.