ISSN:
1572-8773
Keywords:
Erwinia chrysanthemi
;
chrysobactin
;
catechol
;
iron complex
;
coordination
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract The phytopathogenic bacteriumErwinia chrysanthemi produces the monocatecholate siderophore chrysobactin under conditions of iron deprivation. Only the catecholate hydroxyl groups participate in metal coordination, and chrysobactin is therefore unable to provide full 1:1 coordination of Fe(III). The stoichiometry in aqueous solution is a variable dependent on pH and metal/ligand ratio, in addition to being concentration dependent. At neutral pH and concentrations of about 0.1mm, ferric chrysobactin exists as a mixture of bis and tris complexes. Chrysobactin and its isomers form optically active tris complexes. The dominant configuration depends on the chirality of the amino acid to which the catecholate moiety is attached.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01079695
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