Method and bacterial strain for fermentation preparation of Echinocandin B
A technology for seeds and Aspergillus, applied in the field of preparation of echinocandin B, can solve the problems of low unit yield and long fermentation period, and achieve the effects of convenient cultivation, efficient production and good application prospects
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[0024] Example 1: Aspergillus nidulans mutant strain CCTCC NO: M 2012300 fermentation to produce echinocandin B
[0025] The spore suspension of the mutant strain of strain Aspergillus nidulans CCTCC NO:M 2012300 was inoculated into a 250ml Erlenmeyer flask containing 50.0ml seed culture medium and cultured at 25°C for 48h to obtain seed liquid. Seed medium preparation: glucose 1.0%, glycerol 2.5%, cottonseed powder 5%, solvent is distilled water, distilled water 1000.0ml, pH value is natural, and sterilized at 121°C for 20 minutes.
[0026] In order to investigate the influence of the compound nitrogen source of the medium on the fermentation level of Echinocandin B, five different fermentation mediums were designed, the volume of shake flask was 150mL / 500mL, and the composition of the fermentation medium were:
[0027] Medium I: glycerol 1%, peptone 1%, L-proline 0.5%, mannitol 10%, soybean meal 10%, peanut oil 2%, K 2 HPO 4 0.8%, MgSO 4 7H 2 O 0.05%, MnPO 4 H 2 O0.01%, FeSO 4 7H 2...
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[0035] Example 2: Preparation of echinocandin B by fermentation of Aspergillus nidulans ZJB09223 mutant strain
[0036] The spore suspension of Aspergillus nidulans ZJB09223 mutant strain Aspergillus nidulans ZJB09223 was inoculated into a 250ml Erlenmeyer flask containing 50.0ml seed culture medium, cultured at 25°C for 48h to obtain seed liquid. Seed culture medium preparation: glucose 1.0%, glycerol 2.5%, cottonseed powder 5%, solvent is distilled water, distilled water 1000.0ml, pH value is natural; seed culture medium is sterilized at 121℃ for 20 minutes.
[0037] In order to investigate the effect of the compound carbon source of the medium on the fermentation level of echinocandin B, five different fermentation mediums were designed, the volume of shake flask was 150mL / 500mL, and the composition of the fermentation medium were:
[0038] Medium I: glycerol 0.5%, peptone 3%, L-proline 0.5%, mannitol 10%, soybean meal 5%, peanut oil 2%, K 2 HPO 4 0.8%, MgSO 4 7H 2 O 0.05%, MnPO 4...
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[0046] Example 3: Preparation of Echinocandin B by Aspergillus nidulans ZJB09223 mutant strain
[0047] The spore suspension of Aspergillus nidulans ZJB09223 mutant strain Aspergillus nidulans ZJB09223 was inoculated into a 250ml Erlenmeyer flask containing 50.0ml seed culture medium, cultured at 25°C for 48h to obtain seed liquid. Seed medium preparation: glucose 1.0%, glycerol 2.5%, cottonseed powder 1-10%, solvent is distilled water, distilled water 1000.0ml, pH value is natural; seed medium is sterilized at 121°C for 20 minutes.
[0048] In order to investigate the influence of medium inorganic salt ions on the fermentation level of echinocandin B, five different fermentation mediums were designed, the volume of shake flask was 150mL / 500mL, and the composition of the fermentation medium were:
[0049] Medium I: glycerol 1%, peptone 1%, L-proline 0.5%, mannitol 6%, soybean meal 5%, peanut oil 2%, K 2 HPO 4 0.8%, MgSO 4 7H 2 O 0.05%, MnPO 4 H 2 O0.01%, FeSO 4 7H 2 O 0.005%, CaCl 2 ...
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