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Review Articles

Metabolic engineering of Yarrowia lipolytica for terpenoids production: advances and perspectives

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Pages 618-633 | Received 19 Feb 2021, Accepted 08 Jun 2021, Published online: 29 Jul 2021

Figures & data

Figure 1. The biosynthetic pathways of terpenoids. (A) MVA pathway. (B) The decoration process of representative terpenes. (C) Noncanonical precursors derived from DMAPPs. Metabolites: HMG-CoA, 3-hydroxy-3-methylglutaryl-CoA; IPP, isopentenyl diphosphate; DMAPP, dimethylallyl diphosphate; NPP, neryl diphosphate; GPP, geranyl diphosphate; FPP, farnesyl diphosphate; GGPP, geranylgeranyl diphosphate; CPP, chrysanthemyl diphosphate; LPP, lavandulyl diphosphate; MPP, maconellyl diphosphate; PPP, planococcyl diphosphate. Enzymes: ERG10, acetyl-CoA acetyltransferase; ERG13, HMG-CoA synthase; HMGR, HMG-CoA reductase; ERG12, mevalonate kinase; ERG8, phosphomevalonate kinase; ERG19, mevalonate diphosphate decarboxylase; IDI, IPP isomerase; ERG20, farnesyl pyrophosphate synthetase; ERG9, squalene synthase; ERG1, squalene epoxidase; ERG7, lanosterol synthase; NDPS1, neryl diphosphate synthase; PS, pinene synthase; LS, limonene synthase; LIS, linalool synthase; FS, α-farnesene synthase; BFS, β-farnesene synthase; STS, α-santalene synthase; ADS, amorphadiene synthase; BS, bisabolene synthase; BBS, (−)-α-bisabolol synthase; VS, valencene synthase; CYP706M1, (+)-nootkatone synthase; bAS, β-amyrin synthase; CYP716A12, oleanolic acid synthase; LUS, lupeol synthase; CYP716A180, betulinic acid synthase; DS, dammarenediol-II synthase; PPDS, protopanaxadiol synthase; UGT1, UDP-glucose glucosyltransferase; CCD1, carotenoid cleavage dioxygenase; GGPPS, geranylgeranyl diphosphate synthase; CarRP, phytoene synthase/lycopene cyclase; CarB, phytoene dehydrogenase; CrtW, β-carotene ketolase; CrtZ, β-carotene hydrolase.

Figure 1. The biosynthetic pathways of terpenoids. (A) MVA pathway. (B) The decoration process of representative terpenes. (C) Noncanonical precursors derived from DMAPPs. Metabolites: HMG-CoA, 3-hydroxy-3-methylglutaryl-CoA; IPP, isopentenyl diphosphate; DMAPP, dimethylallyl diphosphate; NPP, neryl diphosphate; GPP, geranyl diphosphate; FPP, farnesyl diphosphate; GGPP, geranylgeranyl diphosphate; CPP, chrysanthemyl diphosphate; LPP, lavandulyl diphosphate; MPP, maconellyl diphosphate; PPP, planococcyl diphosphate. Enzymes: ERG10, acetyl-CoA acetyltransferase; ERG13, HMG-CoA synthase; HMGR, HMG-CoA reductase; ERG12, mevalonate kinase; ERG8, phosphomevalonate kinase; ERG19, mevalonate diphosphate decarboxylase; IDI, IPP isomerase; ERG20, farnesyl pyrophosphate synthetase; ERG9, squalene synthase; ERG1, squalene epoxidase; ERG7, lanosterol synthase; NDPS1, neryl diphosphate synthase; PS, pinene synthase; LS, limonene synthase; LIS, linalool synthase; FS, α-farnesene synthase; BFS, β-farnesene synthase; STS, α-santalene synthase; ADS, amorphadiene synthase; BS, bisabolene synthase; BBS, (−)-α-bisabolol synthase; VS, valencene synthase; CYP706M1, (+)-nootkatone synthase; bAS, β-amyrin synthase; CYP716A12, oleanolic acid synthase; LUS, lupeol synthase; CYP716A180, betulinic acid synthase; DS, dammarenediol-II synthase; PPDS, protopanaxadiol synthase; UGT1, UDP-glucose glucosyltransferase; CCD1, carotenoid cleavage dioxygenase; GGPPS, geranylgeranyl diphosphate synthase; CarRP, phytoene synthase/lycopene cyclase; CarB, phytoene dehydrogenase; CrtW, β-carotene ketolase; CrtZ, β-carotene hydrolase.

Table 1. Summary of metabolic engineering strategies for improving terpenoids biosynthesis in Y. lipolytica, and information of representative terpenes with the highest titers reported in E. coli and S. cerevisiae.

Figure 2. Overview of the engineering strategies for terpenoid production in Y. lipolytica. (A) Engineering substrate utilization to minimize production costs. HXK, hexokinase; SsXR, xylose reductase from Scheffersomyces stipitis; SsXDH, xylitol dehydrogenase from Scheffersomyces stipitis; XKS, xylulose kinase. (B) Increasing cytosolic acetyl-CoA supply by introducing heterologous pathways or redirecting native central carbon metabolism. AMPD, AMP deaminase; ICDH, isocitrate dehydrogenase; BbPK, phosphoketolase from Bifidobacterium bifidum; BsPTA, phosphotransacetylase from Bacillus subtilis; ACL, ATP citrate lyase; SeACS, acetyl-CoA synthetase from Salmonella enterica; MFE1, multifunctional β-oxidation enzyme. (C) Overexpressing the genes in MVA pathway and engineering cofactor supply. GND2, 6-phosphogluconate dehydrogenase; MnDH, mannitol dehydrogenase; MAE1, malic enzyme; UGA2, succinate semialdehyde dehydrogenase; IDP2, cytosolic NADP+-specific isocitrate dehydrogenase; AtIPK, isopentenyl phosphate kinase from Arabidopsis thaliana; ScCHK, bifunctional choline kinase/ethanolamine kinase from Saccharomyces cerevisiae. (D) Fine-tuning the expression of key enzymes: combinatorial optimization of P450s-CPRs among species and constructing self‐sufficient P450s by fusion with CPRs; protein engineering to improve the specificity and activity of enzymes; relieving side pathway competition. (E) Modulating hydrophobicity for terpenoid accumulation: increasing intracellular lipids by genetic manipulation or feeding with hydrophobic substrates and in situ trapping with organic overlay. (F) Engineering based on metabolomics analysis: modeling-guided fermentation optimization and metabolic engineering. FBA: flux balance analysis.

Figure 2. Overview of the engineering strategies for terpenoid production in Y. lipolytica. (A) Engineering substrate utilization to minimize production costs. HXK, hexokinase; SsXR, xylose reductase from Scheffersomyces stipitis; SsXDH, xylitol dehydrogenase from Scheffersomyces stipitis; XKS, xylulose kinase. (B) Increasing cytosolic acetyl-CoA supply by introducing heterologous pathways or redirecting native central carbon metabolism. AMPD, AMP deaminase; ICDH, isocitrate dehydrogenase; BbPK, phosphoketolase from Bifidobacterium bifidum; BsPTA, phosphotransacetylase from Bacillus subtilis; ACL, ATP citrate lyase; SeACS, acetyl-CoA synthetase from Salmonella enterica; MFE1, multifunctional β-oxidation enzyme. (C) Overexpressing the genes in MVA pathway and engineering cofactor supply. GND2, 6-phosphogluconate dehydrogenase; MnDH, mannitol dehydrogenase; MAE1, malic enzyme; UGA2, succinate semialdehyde dehydrogenase; IDP2, cytosolic NADP+-specific isocitrate dehydrogenase; AtIPK, isopentenyl phosphate kinase from Arabidopsis thaliana; ScCHK, bifunctional choline kinase/ethanolamine kinase from Saccharomyces cerevisiae. (D) Fine-tuning the expression of key enzymes: combinatorial optimization of P450s-CPRs among species and constructing self‐sufficient P450s by fusion with CPRs; protein engineering to improve the specificity and activity of enzymes; relieving side pathway competition. (E) Modulating hydrophobicity for terpenoid accumulation: increasing intracellular lipids by genetic manipulation or feeding with hydrophobic substrates and in situ trapping with organic overlay. (F) Engineering based on metabolomics analysis: modeling-guided fermentation optimization and metabolic engineering. FBA: flux balance analysis.