Both the full-length and the N-terminal domain of the meningococcal transferrin-binding protein B discriminate between human iron-loaded and apo-transferrin |
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Authors: | Geneviève Renauld-Mongéniea Mireille Latoura David Ponceta Sophie Navillea Marie-José Quentin-Milleta |
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Institution: | Pasteur Mérieux Connaught, 1541, Ave. Marcel Mérieux, 69280 Marcy l'Etoile, France |
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Abstract: | We have readdressed the ability of the transferrin-binding protein B (TbpB) from Neisseria meningitidis to discriminate between the iron-loaded and the iron-free human transferrin (hTf) by using the BIAcore technology, a powerful experimental technique for the observation of direct interactions between a receptor and its ligands, without the use of labels. Recombinant full-length TbpB from five N. meningitidis strains were produced and purified from Escherichia coli as fusion proteins. They showed a preference for the binding to iron-loaded hTf. As for the full-length molecule, we have demonstrated that the minimal N-terminal hTf binding domain of meningococcal TbpB from B16B6 and M982 strains was able to discriminate between both hTf forms. |
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Keywords: | Neisseria meningitidis Transferrin-binding protein B Holo-transferrin Apo-transferrin BIAcore |
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