Pseudodestruxins A and B: new cyclic depsipeptides from the coprophilous fungus Nigrosabulum globosum.
Pseudodestruxins A (1) and B (2), two new cyclic peptides, have been isolated from cultures of the coprophilous fungus Nigrosabulum globosum. The structure of pseudodestruxin A (1) was elucidated using 2D NMR techniques and confirmed by single-crystal X-ray diffraction analysis. The structure of 2 was assigned by comparing its NMR and FABMS data with those of compound 1. The known compounds ascochlorin and 5-chlorocollectorin B were also isolated from N. globosum. Although 1 and 2 display antibacterial effects, ascochlorin was found to be responsible for the antifungal activity of the crude extract.
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Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA.
Swenson
D C
DC
Gloer
J B
JB
Koster
B
B
Malloch
D
D
D000596:Amino Acids / Q000032:analysis; D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000302:isolation & purification* / Q000494:pharmacology; D001203:Ascomycota / Q000737:chemistry*; D001419:Bacteria / Q000187:drug effects; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D018360:Crystallography, X-Ray; D047630:Depsipeptides; D005656:Fungal Proteins; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D010456:Peptides, Cyclic / Q000138:chemical synthesis* / Q000494:pharmacology*; D016339:Spectrometry, Mass, Fast Atom Bombardment
D000596:Amino Acids; D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D047630:Depsipeptides; D005656:Fungal Proteins; D010456:Peptides, Cyclic; C433891:pseudodestruxin A; C433892:pseudodestruxin B