title: 4-hydroxy-2-nonylquinoline: a novel iron chelator isolated from a bacterial cell membrane.
abstract: The membrane associated iron chelator of Pseudomonas aeruginosa has been extracted from membranes of iron-rich cells with ethanol and purified by reverse phase HPLC. Using 13C NMR and FAB mass spectroscopy, the structure of the chelator has been determined to be 4-hydroxy-2-nonylquinoline. This compound has been previously isolated and named pseudan IX, a name which we use here. We synthesized pseudan IX and show that the spectral properties of the synthesized compound and the purified compound are nearly identical. Also purified from the ethanol extract of membranes is 4-hydroxy-2-heptylquinoline, i.e., pseudan VII. Bacterially purified pseudan IX binds iron as indicated by the incorporation of radiolabeled iron into the chelator and by the formation of pink micelles in a concentrated ethanol extract. The formation of pink micelles upon addition of iron to the synthesized compound indicates that it binds iron.
authors.affiliation: Biology Department, George Mason University, Fairfax, Virginia 22030, USA. proyt@gmu.edu
authors.forename: P W
authors.initials: PW
authors.lastname: Royt
authors.forename: R V
authors.initials: RV
authors.lastname: Honeychuck
authors.forename: V
authors.initials: V
authors.lastname: Ravich
authors.forename: P
authors.initials: P
authors.lastname: Ponnaluri
authors.forename: L K
authors.initials: LK
authors.lastname: Pannell
authors.forename: J S
authors.initials: JS
authors.lastname: Buyer
authors.forename: V
authors.initials: V
authors.lastname: Chandhoke
authors.forename: W M
authors.initials: WM
authors.lastname: Stalick
authors.forename: L C
authors.initials: LC
authors.lastname: DeSesso
authors.forename: S
authors.initials: S
authors.lastname: Donohue
authors.forename: R
authors.initials: R
authors.lastname: Ghei
authors.forename: J D
authors.initials: JD
authors.lastname: Relyea
authors.forename: R
authors.initials: R
authors.lastname: Ruiz
mesh_terms: D002851:Chromatography, High Pressure Liquid; D008401:Gas Chromatography-Mass Spectrometry; D007502:Iron Chelating Agents / Q000138:chemical synthesis / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008823:Micelles; D011550:Pseudomonas aeruginosa / Q000737:chemistry*; D011804:Quinolines / Q000138:chemical synthesis / Q000302:isolation & purification*; D015363:Quinolones / Q000138:chemical synthesis / Q000302:isolation & purification*
chemical_list: C452339:4-hydroxy-2-nonylquinoline; D007502:Iron Chelating Agents; D008823:Micelles; D011804:Quinolines; D015363:Quinolones