I. Schalk

Publications126
h-index39
Citations4,635
Highly Influential Citations185
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Quaternary ligand binding to aromatic residues in the active-site gorge of acetylcholinesterase.
Binding sites of Torpedo acetylcholinesterase (EC 3.1.1.7) for quaternary ligands were investigated by x-ray crystallography and photoaffinity labeling. Crystal structures of complexes with ligands… Expand
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Structure and mutational analysis of Rab GDP-dissociation inhibitor
The crystal structure of the bovine α-isoform of Rab GDP-dissociation inhibitor (GDI), which functions in vesicle-membrane transport to recycle and regulate Rab GTPases, has been determined to a… Expand
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Pyoverdine biosynthesis and secretion in Pseudomonas aeruginosa: implications for metal homeostasis.
Pyoverdines are siderophores produced by fluorescent Pseudomonads to acquire iron. At least 60 different pyoverdines produced by diverse strains have been chemically characterized. They all consist… Expand
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Presence of the siderophores pyoverdine and pyochelin in the extracellular medium reduces toxic metal accumulation in Pseudomonas aeruginosa and increases bacterial metal tolerance.
In order to get access to iron, Pseudomonas aeruginosa strain PAO1 produces two major siderophores pyoverdine (PVD) and pyochelin (PCH). Both siderophores are able to chelate many other metals in… Expand
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Synthesis of the siderophore pyoverdine in Pseudomonas aeruginosa involves a periplasmic maturation
Pyoverdines, the main siderophores produced by fluorescent Pseudomonads, comprise a fluorescent dihydroxyquinoline chromophore attached to a strain-specific peptide. These molecules are thought to be… Expand
  • 82
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New roles for bacterial siderophores in metal transport and tolerance.
Siderophores are chelators with extremely strong affinity for ferric iron and are best known for their capacity to feed microorganisms with this metal. Despite their preference for iron, they can… Expand
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The Crystal Structure of the Pyoverdine Outer Membrane Receptor FpvA from Pseudomonas aeruginosa at 3.6 Å Resolution
The pyoverdine outer membrane receptor FpvA from Pseudomonas aeruginosa translocates ferric-pyoverdine across the outer membrane via an energy consuming mechanism that involves the inner membrane… Expand
  • 135
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New insights into the metal specificity of the Pseudomonas aeruginosa pyoverdine-iron uptake pathway.
Pyoverdine (PvdI) is the major siderophore secreted by Pseudomonas aeruginosa PAOI in order to get access to iron. After being loaded with iron in the extracellular medium, PvdI is transported across… Expand
  • 158
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Pseudomonas fluorescens CHA0 Produces Enantio-pyochelin, the Optical Antipode of the Pseudomonas aeruginosa Siderophore Pyochelin*
The siderophore pyochelin is made by a thiotemplate mechanism from salicylate and two molecules of cysteine. In Pseudomonas aeruginosa, the first cysteine residue is converted to its D-isoform during… Expand
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Cell–cell contacts confine public goods diffusion inside Pseudomonas aeruginosa clonal microcolonies
The maintenance of cooperation in populations where public goods are equally accessible to all but inflict a fitness cost on individual producers is a long-standing puzzle of evolutionary biology. An… Expand
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