Construction of lignan glycosides biosynthetic network in Escherichia coli using mutltienzyme modules.

Publisher: BioMed Central Country of Publication: England NLM ID: 101139812 Publication Model: Electronic Cited Medium: Internet ISSN: 1475-2859 (Electronic) Linking ISSN: 14752859 NLM ISO Abbreviation: Microb Cell Fact Subsets: MEDLINE

Original Publication: London : BioMed Central, [2002-

Lignans*/biosynthesis ; Lignans*/metabolism ; Glycosides*/biosynthesis ; Glycosides*/metabolism ; Escherichia coli*/metabolism ; Escherichia coli*/genetics ; Biosynthetic Pathways*; Metabolic Engineering/methods ; Fermentation ; Synthetic Biology/methods ; Furans/metabolism

Background: Due to the complexity of the metabolic pathway network of active ingredients, precise targeted synthesis of any active ingredient on a synthetic network is a huge challenge. Based on a complete analysis of the active ingredient pathway in a species, this goal can be achieved by elucidating the functional differences of each enzyme in the pathway and achieving this goal through different combinations. Lignans are a class of phytoestrogens that are present abundantly in plants and play a role in various physiological activities of plants due to their structural diversity. In addition, lignans offer various medicinal benefits to humans. Despite their value, the low concentration of lignans in plants limits their extraction and utilization. Recently, synthetic biology approaches have been explored for lignan production, but achieving the synthesis of most lignans, especially the more valuable lignan glycosides, across the entire synthetic network remains incomplete.
Results: By evaluating various gene construction methods and sequences, we determined that the pCDF-Duet-Prx02-PsVAO gene construction was the most effective for the production of (+)-pinoresinol, yielding up to 698.9 mg/L after shake-flask fermentation. Based on the stable production of (+)-pinoresinol, we synthesized downstream metabolites in vivo. By comparing different fermentation methods, including "one-cell, one-pot" and "multicellular one-pot", we determined that the "multicellular one-pot" method was more effective for producing (+)-lariciresinol, (-)-secoisolariciresinol, (-)-matairesinol, and their glycoside products. The "multicellular one-pot" fermentation yielded 434.08 mg/L of (+)-lariciresinol, 96.81 mg/L of (-)-secoisolariciresinol, and 45.14 mg/L of (-)-matairesinol. Subsequently, ultilizing the strict substrate recognition pecificities of UDP-glycosyltransferase (UGT) incorporating the native uridine diphosphate glucose (UDPG) Module for in vivo synthesis of glycoside products resulted in the following yields: (+)-pinoresinol glucoside: 1.71 mg/L, (+)-lariciresinol-4-O-D-glucopyranoside: 1.3 mg/L, (+)-lariciresinol-4'-O-D-glucopyranoside: 836 µg/L, (-)-secoisolariciresinol monoglucoside: 103.77 µg/L, (-)-matairesinol-4-O-D-glucopyranoside: 86.79 µg/L, and (-)-matairesinol-4'-O-D-glucopyranoside: 74.5 µg/L.
Conclusions: By using various construction and fermentation methods, we successfully synthesized 10 products of the lignan pathway in Isatis indigotica Fort in Escherichia coli, with eugenol as substrate. Additionally, we obtained a diverse range of lignan products by combining different modules, setting a foundation for future high-yield lignan production.
(© 2024. The Author(s).)

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2023YFC3504800 National Key Research and Development Program of China; U23A20512, 32170402 National Natural Science Foundation of China; 23XD1423500 Program of Shanghai Academic/Technology Research Leader

Keywords: Escherichia coli; Heterologous biosynthesis; Lignans; Module assembly

0 (Lignans)
0 (Glycosides)
V4N1UDY811 (pinoresinol)
0 (Furans)

Date Created: 20240705 Date Completed: 20240705 Latest Revision: 20240708

20240708

PMC11225284

10.1186/s12934-024-02467-1

38970026