The Neutrophil Lipocalin NGAL is a Bacteriostatic Agent that Interferes with Siderophore-mediated Iron AcquisitionGoetz, D.H., Borregaard, N., Bluhm, M.E., Raymond, K.N., Strong, R.K.
(2002) Mol.Cell 10: 1033-1043
- PubMed: 12453412
- PubMed Abstract:
- Ligand preference inferred from the structure of Neutrophil Gelatinase Associated Lipocalin (NGAL)
Goetz, D.H.,Willie, S.T.,Armen, R.,Bratt, T.,Borregaard, N.,Strong, R.K.
(2000) Biochemistry 39: 1935
First identified as a neutrophil granule component, neutrophil gelatinase-associated lipocalin (NGAL; also called human neutrophil lipocalin, 24p3, uterocalin, or neu-related lipocalin) is a member of the lipocalin family of binding proteins. Putativ ...
First identified as a neutrophil granule component, neutrophil gelatinase-associated lipocalin (NGAL; also called human neutrophil lipocalin, 24p3, uterocalin, or neu-related lipocalin) is a member of the lipocalin family of binding proteins. Putative NGAL ligands, including neutrophil chemotactic agents such as N-formylated tripeptides, have all been refuted by recent biochemical and structural results. NGAL has subsequently been implicated in diverse cellular processes, but without a characterized ligand, the molecular basis of these functions remained mysterious. Here we report that NGAL tightly binds bacterial catecholate-type ferric siderophores through a cyclically permuted, hybrid electrostatic/cation-pi interaction and is a potent bacteriostatic agent in iron-limiting conditions. We therefore propose that NGAL participates in the antibacterial iron depletion strategy of the innate immune system.
Molecular and Cellular Biology Program, Fred Hutchinson Cancer Research Center, Box 357275, University of Washington, Seattle, WA 98105, USA.