One-Pot Synthesis of Useful S-Substituted-l-cysteine Sulfoxides Using Genetically Engineered Escherichia coli.
J Agric Food Chem
; 72(10): 5339-5347, 2024 Mar 13.
Article
in En
| MEDLINE
| ID: mdl-38417143
ABSTRACT
S-Substituted-l-cysteine sulfoxides are valuable compounds that are contained in plants. Particularly, (+)-alliin and its degraded products have gained significant attention because of their human health benefits. However, (+)-alliin production has been limited to extraction from plants and chemical synthesis; both methods have drawbacks in terms of stability and safety. Here, we proposed the enzymatic cascade reaction for synthesizing (+)-alliin from readily available substrates. To achieve a one-pot (+)-alliin production, we constructed Escherichia coli coexpressing the genes encoding tryptophan synthase from Aeromonas hydrophila ssp. hydrophila NBRC 3820 and l-isoleucine hydroxylase from Bacillus thuringiensis 2e2 for the biocatalyst. Deletion of tryptophanase gene in E. coli increased the yield about 2-fold. Under optimized conditions, (+)-alliin accumulation reached 110 mM, which is the highest productivity thus far. Moreover, natural and unnatural S-substituted-l-cysteine sulfoxides were synthesized by applying various thiols to the cascade reaction. These results indicate that the developed bioprocess would enable the supply of diverse S-substituted-l-cysteine sulfoxides.
Key words
Full text:
1
Collection:
01-internacional
Health context:
3_ND
Database:
MEDLINE
Main subject:
Cysteine
/
Escherichia coli
Limits:
Humans
Language:
En
Journal:
J Agric Food Chem
Year:
2024
Document type:
Article