Significant stimulation of o-phthalic acid in biosynthesis of aspergiolide A by a marine fungus Aspergillus glaucus.
The effect of o-phthalic acid (o-PA) on the production of the anti-tumor polyketide compound aspergiolide A by the marine fungus Aspergillus glaucus was investigated. o-PA at 12mM increased the aspergiolide A production by 77%. A combination of 12mM acetate with 12mM o-PA increased the production by 126%, i.e., from 27.1mg/l to 60.9mg/l, which was 27% and 75% higher than adding either 12mM o-PA or 12mM acetate, respectively. It was also found that A. glaucus could use o-PA as the sole carbon source on Minimal Medium. Ninety percent of o-PA was degraded by the fungus strain, especially when 12mM acetate was supplemented simultaneously. In culture medium supplemented with o-PA addition, sugar consumption decreased with increasing o-PA concentration, at the same time, the oxalacetate and pyruvate levels increased and the concentration of fumarate decreased. The results indicated that o-PA could stimulate biosynthesis of aspergiolide A effectively by regulating the metabolic pathway.
Sun
Xueqian
X
State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
Zhou
Xiangshan
X
Cai
Menghao
M
Zhou
Jiushun
J
Zhang
Yuanxing
Y
D000880:Anthraquinones / Q000378:metabolism*; D001230:Aspergillus / Q000187:drug effects* / Q000378:metabolism; D018533:Biomass; D002851:Chromatography, High Pressure Liquid; D003470:Culture Media; D010795:Phthalic Acids / Q000494:pharmacology*
D000880:Anthraquinones; D003470:Culture Media; D010795:Phthalic Acids; C542894:aspergiolide A; C032279:phthalic acid