Highly efficient bio-production of putrescine from L-arginine with arginase and L-ornithine decarboxylase in engineered Escherichia coli.
Bioresour Technol
; : 131471, 2024 Sep 09.
Article
em En
| MEDLINE
| ID: mdl-39260727
ABSTRACT
To achieve industrial-scale putrescine production, a high efficient bio-synthesis of putrescine involving arginase (ARG, EC 3.5.3.1) and L-ornithine decarboxylase was evaluated here. Among the four arginases tested, ARGBT from Bos Taurus showed the highest activity (1966 U/mg). Compared to the L-arginine decarboxylase (ADC) pathway, the strain expressing ARGBT and L-ornithine decarboxylase (SpeC) produced 28.7â¯g/L putrescine, a 38.6â¯% increase. Two pyridoxal phosphate (PLP) salvage pathways were evaluated, and the strain BL-PTac-PdxK co-expressed pyridoxal kinase (PdxK) performed better. D-Glucose was used as the co-substrate to improve the putrescine titer further. Under optimal conditions, 43.6â¯g/L putrescine was produced from 87.1â¯g/L L-arginine, and 76â¯g/L putrescine was synthesized on a 0.5 L scale. Using L-arginine fermentation broth (60â¯g/L) as the substrate, a titer of 30â¯g/L putrescine was achieved. This efficient biotransformation process presented here enables feasible industrial-scale putrescine production.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Bioresour Technol
Ano de publicação:
2024
Tipo de documento:
Article