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Bioproduction of glucose conjugates of 4-hydroxybenzoic and vanillic acids using bamboo cells transformed to express bacterial 4-hydroxycinnamoyl-CoA hydratase/lyase.

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Rational metabolic-flow switching, which we proposed recently, is an effective strategy to produce an exogenous high-value natural product using transformed plant cells; the proof of this concept was demonstrated using… Click to show full abstract

Rational metabolic-flow switching, which we proposed recently, is an effective strategy to produce an exogenous high-value natural product using transformed plant cells; the proof of this concept was demonstrated using bamboo (Phyllostachys nigra; Pn) cells as a model system. Pn cells were transformed to express 4-hydroxycinnamoyl-CoA hydratase/lyase of Pseudomonas putida KT2440 (PpHCHL), which catalyzes the formation of 4-hydroxybenzaldehyde and vanillin from p-coumaroyl-CoA and feruloyl-CoA, respectively. The PpHCHL-transformed cells accumulated glucose conjugates of 4-hydroxybenzoic acid and vanillic acid, indicating that the PpHCHL products (aldehydes) were further metabolized by inherent enzymes in the Pn cells. The production titers of 4-hydroxybenzoic acid glucose ester, vanillic acid glucose ester, and 4-hydroxybenzoic acid glucoside reached 1.7, 0.17, and 0.14 g/L at the maximum, respectively. These results proved the versatility of Pn cells for producing vanillin-related compounds based on rational metabolic-flow switching.

Keywords: using bamboo; hydroxycinnamoyl coa; coa; coa hydratase; transformed express; cells transformed

Journal Title: Journal of bioscience and bioengineering
Year Published: 2020

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