Photoreactivity of iron(III)-aerobactin: photoproduct structure and iron(III) coordination.

Photoreactivity of iron(III)-aerobactin: photoproduct structure and iron(III) coordination. Research Abstract Details 

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Photoreactivity of iron(III)-aerobactin: photoproduct structure and iron(III) coordination. Abstract Text:

Frithjof C ,Carl J Carrano,Jens-Uwe Kuhn,Alison Butler,

UV photolysis of the ferric aerobactin complex results in decarboxylation of the alpha-hydroxy carboxylic acid group of the central citrate moiety of aerobactin. The structure determination of the photooxidized ligand shows that decarboxylation occurs at the citrate moiety forming a 3-ketoglutarate moiety. Proton and carbon-13 NMR establish the presence of keto and enol tautomers of the apo-photoproduct, with the enol form prevailing in water. The photoproduct retains the ability to coordinate iron(III). The values of the ligand protonation constants, the pKa of the Fe(III)-ligand complex, and the Fe(III) stability constant of the photoproduct of aerobactin are all close to those of aerobactin. CD spectroscopy suggests that the chirality of the ferric complexes of aerobactin and its photoproduct are similar. Like aerobactin, the photoproduct promotes iron acquisition by the source bacterium, Vibrio sp. DS40M5.

Photoreactivity of iron(III)-aerobactin: photoproduct structure and iron(III) coordination. Publishing Authors By Initials

FC ,CJ Carrano,JU Kuhn,A Butler,

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Photoreactivity of iron(III)-aerobactin: photoproduct structure and iron(III) coordination. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Inorganic chemistry

VOLUME: 45

Page Numbers: 6028-33

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ISSN: 0020-1669

DAY: 24

MONTH: Jul

YEAR: 2006

Photoreactivity of iron(III)-aerobactin: photoproduct structure and iron(III) coordination. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Photoreactivity of iron(III)-aerobactin: photoproduct structure and iron(III) coordination.

AFFILIATION: Departments of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106-9510, USA.

Country: United States

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MEDLINETA: Inorg Chem

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