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Isolation and characterization of a new variant of surfactin, the [Val7]surfactin
Abstract
Reinvestigation of surfactin, a previously studied peptidolipid surfactant from Bacillus subtilis, by fast-atom-bombardment mass spectrometry and 1H-NMR spectroscopy, as well as by chemical methods, revealed the presence of a closely related second constituent. This new compound, [Val7]surfactin, differs from the known surfactin by the C-terminal amino acid residue which is valine instead of leucine.
Abbreviations
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- FAB
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- fast atom bombardment
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- HOHAHA
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- homonuclear Hartman-Hahn
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- DQF-COSY
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- double-quantum-filter correlation spectroscopy
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- 1D
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- one-dimensional
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- 2D
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- two-dimensional