title: Termination of the structural confusion between plipastatin A1 and fengycin IX.
abstract: Plipastatin A1 and fengycin IX were experimentally proven to be identical compounds, while these had been considered as diastereomers due to the permutation of the enantiomeric pair of Tyr in most papers. The (1)H NMR spectrum changed to become quite similar to that of plipastatin A1, when the sample which provided resembled spectrum of fengycin IX was treated with KOAc followed by LH-20 gel filtration. Our structural investigations disclosed that the structures of these molecules should be settled into that of plipastatin A1 by Umezawa (L-Tyr4 and D-Tyr10).
authors.affiliation: Department of Agriculture and Bioscience, Hirosaki University, 3-Bunkyo-cho, Hirosaki 036-8561, Japan.
authors.forename: Miho
authors.initials: M
authors.lastname: Honma
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Tanaka
authors.forename: Katsuhiro
authors.initials: K
authors.lastname: Konno
authors.forename: Kenji
authors.initials: K
authors.lastname: Tsuge
authors.forename: Toshikatsu
authors.initials: T
authors.lastname: Okuno
authors.forename: Masaru
authors.initials: M
authors.lastname: Hashimoto
mesh_terms: D001412:Bacillus subtilis / Q000737:chemistry / Q000302:isolation & purification; D005227:Fatty Acids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009842:Oligopeptides / Q000737:chemistry*; D010456:Peptides, Cyclic / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D005227:Fatty Acids; D009842:Oligopeptides; D010456:Peptides, Cyclic; C576516:fengycin IX; C049901:plipastatin