New short peptaibols from a marine Trichoderma strain.
The production of peptaibols by a marine-related Trichoderma longibrachiatum strain was studied using electrospray ionisation multiple-stage ion trap mass spectrometry (ESI-MSn-IT) and gas chromatography/electron impact mass spectrometry (GC/EI-MS). Two major groups of peptaibols were identified, those with long sequences (20 amino acids) and others with short sequences (11 amino acids). This paper describes the methodology used to establish the sequences of short peptaibols in a mixture without previous individual separation. Nine peptaibols were identified. Among them, eight are new, namely as trichobrachin A I-IV (Aib9-Pro10 sequence) and as trichobrachin B I-IV (Val9-Pro10 sequence). Original Pro6-Val7 and Val9-Pro10 sequences have to be noted.
Université de Nantes, Groupe SMAB-EA 2160, Faculté de pharmacie, BP 53508, 44035 Nantes Cedex 1, France.
Mustapha
M
Mohamed-Benkada
Monique
M
Montagu
Jean-François
JF
Biard
Florence
F
Mondeguer
Philippe
P
Verite
Michèle
M
Dalgalarrondo
John
J
Bissett
Yves François
YF
Pouchus
D008401:Gas Chromatography-Mass Spectrometry; D010455:Peptides / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D012997:Solvents; D021241:Spectrometry, Mass, Electrospray Ionization; D014242:Trichoderma / Q000737:chemistry* / Q000378:metabolism
D010455:Peptides; D012997:Solvents