Production and derivate composition of trisporoids in extended fermentation of Blakeslea trispora.
Trisporic acid, its precursors and derivatives are used within zygomycete fungi as communication signals and sexual regulators, and also influence the production rate of the parent compound, beta-carotene. Cultivation parameters during growth and the trisporoid production phase of Blakeslea trispora were studied in two-step shake flask cultures and up-scaled fermentations. Comparison of various fermentation protocols allowed the definition of parameters governing trisporoid production. Highest yields were obtained when the initial growth phase allowed for both rapid growth and fast exhaustion of nitrogen and phosporous sources. Onset of trisporoid production is accompanied by a pH drop in the medium and triggered by nutrient limitation, nitrogen depletion being the most important factor. Supplementation of cultures with carbon at low concentration after onset of trisporoid production led to prolonged growth and higher final product accumulation. B. trispora produces trisporoids in two major series, B and C. During a first peak in trisporic acid accumulation, production of trisporic acid B exceeds that of trisporic acid C, which later accumulates at the expense of the trisporic acid B, indicating a variable regulation of the ratio between these metabolites. These data are valuable for tailoring production systems for enrichment of specific intermediates of this complex signal family.
Schachtschabel
Doreen
D
Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Str. 8, 07745, Jena, Germany.
Menzel
Klaus-Dieter
KD
Krauter
Gudrun
G
David
Anja
A
Roth
Martin
M
Horn
Uwe
U
Boland
Wilhelm
W
Wöstemeyer
Johannes
J
Schimek
Christine
C
D002244:Carbon / Q000378:metabolism; D003470:Culture Media / Q000737:chemistry; D005231:Fatty Acids, Unsaturated / Q000737:chemistry / Q000378:metabolism*; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D009090:Mucorales / Q000254:growth & development / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D019207:beta Carotene / Q000378:metabolism
D003470:Culture Media; D005231:Fatty Acids, Unsaturated; D019207:beta Carotene; C004574:trisporic acid; D010758:Phosphorus; D002244:Carbon; D009584:Nitrogen