Recombinant 11-de-O-methyltomaymycin Production Yield
Solution Overview
Problem
Current methods for producing tomaymycin result in unsatisfactory yields, highlighting a need for an effective method to produce high amounts of this antibiotic.
Innovation Solution
A method involving the use of a DNA nucleic acid sequence (SEQ ID NO: 3) or its variants, introduced into a Streptomyces strain, specifically Streptomyces albus J1074, to express the tomaymycin biosynthetic gene cluster, enabling the production of 11-de-O-methyltomaymycin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional media and methods are used for tomaymycin production, then the production process is simple, but the yield is unsatisfactory and low
Solution Approach 1:
The patent optimizes cultural conditions including pH (adjusted to 7.0-7.5), temperature (28-30°C), aeration rate (1.5-2.0 vvm), and agitation speed (600-800 rpm) to maximize tomaymycin yield. The production medium composition is also optimized with specific concentrations of soybean flour (20 g/L), corn steep powder (10 g/L), glycerol (20 g/L), and other nutrients to achieve high productivity of 338 ± 18.8 mg/L
Solution Approach 2:
The patent employs a two-stage fermentation process: a growth phase (48-72 hours) to build biomass, followed by a production phase where tomaymycin is synthesized. This preliminary separation of growth and production phases allows optimization of conditions for each stage, resulting in significantly enhanced yield compared to continuous conventional methods
2Productivity
If Streptomyces achromogenes var. tomaymyceticus is used for production, then the natural production capability is maintained, but the yield remains low at 20 mg/L
Solution Approach 1:
The patent uses Streptomyces albus J1074 as a heterologous host organism to express the tomaymycin biosynthetic gene cluster from S. achromogenes. This intermediary approach allows the production system to benefit from the optimized cultural conditions and higher biomass capacity of S. albus while producing tomaymycin, achieving yields of 338 ± 18.8 mg/L compared to only 20 mg/L with the native strain
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the production yield of 11-de-O-methyltomaymycin, achieving a significant increase in productivity compared to standard methods, with Streptomyces albus J1074 producing 338 ± 18.8 mg/l, whereas the standard strain produces 20 mg/l under similar conditions.
Implementation Method 1
A method involving the use of a DNA nucleic acid sequence (SEQ ID NO: 3) or its variants, introduced into a Streptomyces strain, specifically Streptomyces albus J1074, to express the tomaymycin biosynthetic gene cluster, enabling the production of 11-de-O-methyltomaymycin
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
The present invention provides a tomaymycin biosynthetic gene cluster of Streptomyces species FH6421,and its use for producing 11-de-O-methyltomaymycin.