title: Siderophores of highly phytopathogenic Alternaria longipes. Structures of hydroxycoprogens.
abstract: Alternaria longipes ATCC 26293, a highly phytopathogenic fungus, has been found to produce a large number of siderophores under iron-deficient conditions. Most of the compounds are members of the coprogen family. Structures of three novel siderophores, termed hydroxycoprogens, have been determined by 1H and 13C NMR, FAB mass spectrometry and partial hydrolysis. The compounds are analogs of coprogen, neocoprogen I and isoneocoprogen I, in which one of the terminal trans-anhydromevalonic acid residues is replaced by a trans-4,5 dihydroxy-3-methyl-2-pentenoic acid residue.
authors.affiliation: Department of Chemistry, University of Oklahoma, Norman 73019.
authors.forename: M A
authors.initials: MA
authors.lastname: Jalal
authors.forename: D
authors.initials: D
authors.lastname: van der Helm
mesh_terms: D000528:Alternaria / Q000032:analysis*; D002855:Chromatography, Thin Layer; D004590:Electrophoresis, Paper; D006877:Hydroxamic Acids / Q000302:isolation & purification; D007502:Iron Chelating Agents / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010944:Plants / Q000382:microbiology; D017262:Siderophores
chemical_list: D006877:Hydroxamic Acids; D007502:Iron Chelating Agents; D017262:Siderophores; C066152:hydroxycoprogen; C066155:hydroxyneocoprogen I; C066153:hydroxyisoneocoprogen I