A cytochrome P-450 (heme-thiolate) protein. The enzyme from the plant Hyoscymus muticus also hydroxylates valencene at C-2 to give the α-hydroxy compound, nootkatol, and this is converted into nootkatone. 5-Epiaristolochene and epieremophilene are hydroxylated at C-2 to give a 2β-hydroxy derivatives that are not oxidized further.
The enzyme appears in viruses and cellular organisms
A cytochrome P-450 (heme-thiolate) protein. The enzyme from the plant Hyoscymus muticus also hydroxylates valencene at C-2 to give the alpha-hydroxy compound, nootkatol, and this is converted into nootkatone. 5-Epiaristolochene and epieremophilene are hydroxylated at C-2 to give a 2beta-hydroxy derivatives that are not oxidized further.
Substrates: substrate affinity for 5-epiaristolochene is 2-4times lower than that for valencene or (-)-premnaspirodiene, respectively. HPO catalyzes the conversion of 5-epiaristolochene to four mono-hydroxylated products with 2beta-hydroxy-epiaristolochene comprising greater than 80% of the reaction products, 1beta-hydroxy-epiaristolochene about 5%, 3alpha-hydroxy-epiaristolochene less than 2%, and an unknown mono-hydroxylated product of about 20% Products: -
Substrates: HPO also catalyzes the equivalent regio-specific (C-2) hydroxylation of several eremophilane-type (decalin ring system) sesquiterpenes, such as with 5-epi-aristolochene Products: -
Substrates: HPO also catalyzes the equivalent regio-specific (C-2) hydroxylation of several eremophilane-type (decalin ring system) sesquiterpenes, such as with 5-epi-aristolochene Products: -
Substrates: co-expression of enzyme HPO and cytochrome P450 reductase (CPR) leads to the hydroxylation of externally added (+)-valencene to trans-nootkatol in Pichia pastoris cells Products: -
Substrates: co-expression of enzyme HPO and cytochrome P450 reductase (CPR) leads to the hydroxylation of externally added (+)-valencene to trans-nootkatol in Pichia pastoris cells Products: -
Substrates: HPO also catalyzes the equivalent regio-specific (C-2) hydroxylation of several eremophilane-type (decalin ring system) sesquiterpenes, such as with 5-epi-aristolochene Products: -
Substrates: HPO also catalyzes the equivalent regio-specific (C-2) hydroxylation of several eremophilane-type (decalin ring system) sesquiterpenes, such as with 5-epi-aristolochene Products: -
Substrates: co-expression of enzyme HPO and cytochrome P450 reductase (CPR) leads to the hydroxylation of externally added (+)-valencene to trans-nootkatol in Pichia pastoris cells Products: -
Substrates: co-expression of enzyme HPO and cytochrome P450 reductase (CPR) leads to the hydroxylation of externally added (+)-valencene to trans-nootkatol in Pichia pastoris cells Products: -
A flavoprotein containing both FMN and FAD. This enzyme catalyses the transfer of electrons from NADPH, an obligatory two-electron donor, to microsomal P-450 monooxygenases, EC 1.14.14._
A flavoprotein containing both FMN and FAD. This enzyme catalyses the transfer of electrons from NADPH, an obligatory two-electron donor, to microsomal P-450 monooxygenases, EC 1.14.14._
involvement of signal proteins and defence enzymes premnaspirodiene oxygenase, phosphatase 2C-like domain-containing protein, nitrous oxide reductase family maturation protein, putative disease resistance protein RGA3, aspartyl protease, beta-glucosidase enzyme, cP450 signal protein, serine/threonine protein kinase WAG1 and nucleoredoxin 1-1 enzyme in field tolerance of black pepper to foot rot oomycete Phytophthora capsici, molecular mechanisms, overview. Foot rot or quick wilt caused by oomycete Phytophthora capsici is a serious disease in black pepper with blight on runner shoots, foliage, spikes and branches, spike shedding, defoliation, die back, collar and foot rot and death of plants. Premnaspirodiene oxygenase is involved in the hydroxylation of resveratrol to piceatannol, a phytoalexin, by which it promotes the intolerance against the pathogen
overexpression of rice premnaspirodiene oxygenase reduces the infection rate of Xanthomonas oryzae pv. oryzae. Gene OsCYP71 does not contain a signal peptide
the mutant possesses a 5fold improvement in its catalytic efficiency for nootkatol biosynthesis and a 10fold improvement for 2beta-hydroxy-epiaristolochene biosynthesis
production of the sesquiterpenoid (+)-nootkatone by metabolic engineering of Pichia pastoris by generation of a strain co-expressing the premnaspirodiene oxygenase of Hyoscyamus muticus (HPO) and the Arabidopsis thaliana cytochrome P450 reductase (CPR) that hydroxylates extracellularly added (+)-valencene. Intracellular production of (+)-valencene by co-expression of valencene synthase from Callitropsis nootkatensis resolves the phase-transfer issues of (+)-valencene. Bi-phasic cultivations of Pichia pastoris result in the production of trans-nootkatol, which is oxidized to (+)-nootkatone by an intrinsic Pichia pastoris activity. Additional overexpression of a Pichia pastoris alcohol dehydrogenase and truncated hydroxy-methylglutaryl-CoA reductase (tHmg1p) significantly enhances the (+)-nootkatone yield to 208 mg/l cell culture in bioreactor cultivations. After 12 h of biotransformation about 50% of added (+)-valencene is converted to (+)-nootkatone without residual trans-nootkatol or ot herby-products, but with a moderate overall yield of 48% due to high substrate loss overtime. HPO,CPR and ADH-C3 protein levels are only marginally decreased by co-overexpression of tHMG1
production of the sesquiterpenoid (+)-nootkatone by metabolic engineering of Pichia pastoris by generation of a strain co-expressing the premnaspirodiene oxygenase of Hyoscyamus muticus (HPO) and the Arabidopsis thaliana cytochrome P450 reductase (CPR) that hydroxylates extracellularly added (+)-valencene. Intracellular production of (+)-valencene by co-expression of valencene synthase from Callitropsis nootkatensis resolves the phase-transfer issues of (+)-valencene. Bi-phasic cultivations of Pichia pastoris result in the production of trans-nootkatol, which is oxidized to (+)-nootkatone by an intrinsic Pichia pastoris activity. Additional overexpression of a Pichia pastoris alcohol dehydrogenase and truncated hydroxy-methylglutaryl-CoA reductase (tHmg1p) significantly enhances the (+)-nootkatone yield to 208 mg/l cell culture in bioreactor cultivations. After 12 h of biotransformation about 50% of added (+)-valencene is converted to (+)-nootkatone without residual trans-nootkatol or ot herby-products, but with a moderate overall yield of 48% due to high substrate loss overtime. HPO,CPR and ADH-C3 protein levels are only marginally decreased by co-overexpression of tHMG1
metabolic engineering Saccharomyces cerevisiae for de novo production of the sesquiterpenoid (+)-nootkatone. As the direct precursor of (+)-nootkatone biosynthesis, (+)-valencene is first produced in large quantities in Saccharomyces cerevisiae by overexpressing (+)-valencene synthase CnVS of Callitropsis nootkatensis in combination with various mevalonate pathway (MVA) engineering strategies, including the expression of CnVS and farnesyl diphosphate synthase (ERG20) as a fused protein, overexpression of a truncated form of the rate-limiting enzyme 3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase (tHMG1), and downregulating the squalene synthase enzyme (ERG9). These approaches altogether bring the production of (+)-valencene to 217.95 mg/l. Secondly, the (+)-valencene oxidation is adressed by overexpressing the Hyoscyamus muticus premnaspirodiene oxygenase (HPO) variant V482I/A484I and cytochrome P450 reductase (ATR1) from Arabidopsis thaliana. (+)-Valencene is predominantly oxidized to beta-nootkatol, and only minor amounts of (+)-nootkatone (9.66 mg/l) are produced. The short-chain dehydrogenase/reductase (SDR) superfamily dehydrogenases ZSD1 of Zingiber zerumbet and ABA2 of Citrus sinensis are capable of effectively catalyzing beta-nootkatol oxidation to (+)-nootkatone. The yield of (+)-nootkatone increases to 59.78 mg/l and 53.48 mg/l by combined overexpression of ZSD1 and ABA2, respectively. Metabolites GC analysis. Pathway reconstruction mechanism, overview
development of a viable bioprocess using premnaspirodiene oxygenase from Hyoscyamus muticus (HPO), cytochrome P450 reductase from Arabidopsis thaliana (AtCPR) and alcohol dehydrogenase (ADH1) from Saccharomyces cerevisiae overexpressed in CEN-PK2-1Ca, yielding beta-nootkatol and (+)-nootkatone with 170.5 and 45.6 mg/l ethyl acetate, respectively. A combinational engineering strategy including promoter change, regulator ROX1 knockout, squalene pathway inhibition, and tHMGR overexpression is performed to achieve de novo (+)-valencene production. Subsequent culture investigations show that galactose as the induced carbon source and a lower temperature of 25°C are beneficial to target accumulation. Considering the toxic effects of (+)-valencene to Saccharomyces cerevisiae, the (+)-valencene synthase gene under a weaker endogenous promoter of TEF1 (PTEF1) is cloned, yielding the recombinant yeast of PK2-14. Also, replacing the inducible promoters (GAL1) of HPO and AtCPR with constitutive promoters, HXT7 and CYC1, increases the beta-nootkatol accumulation from 108.2 to 327.8 mg/l ethyl acetate in resting-cell experiments using (+)-valencene as a substrate. The total terpenoid titer of the engineered strain of PK2-25 using glucose as a carbon source is improved 56fold to 157.8 mg/l cell culture. Bi-phasic batch cultivation in shake flasks. Method development and evaluation, overview
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CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
co-expression of C-terminally FLAG-tagged premnaspirodiene oxygenase of Hyoscyamus muticus (HPO) and the Arabidopsis thaliana cytochrome P450 reductase (CPR) in Pichia pastoris strains ADH-C1 and -C3
CYP71D55, recombinant expression in Saccharomyces cerevisiae strain PK2-25 under control of a constitutive promoter, coexpression with cytochrome P450 reductase from Arabidopsis thaliana (AtCPR) and alcohol dehydrogenase (ADH1) from Saccharomyces cerevisiae
gene OsCYP71, DNA and amino acid seuence determination and analysis, sequence comparisons and phylogenetic analysis. Overexpression of full-length cDNA of premnaspirodiene oxygenase from Oryza sativa subsp. japonica in the wild-type, Dongjin, which is susceptible to bacterial blight Korean strain K2, transformed via Agrobacterium tumefaciens strain EHA105 reduces the infection rate of Xanthomonas oryzae pv. oryzae
Functional characterization of premnaspirodiene oxygenase, a cytochrome P450 catalyzing regio- and stereo-specific hydroxylations of diverse sesquiterpene substrates
Comparative transcriptome analysis reveals the signal proteins and defence genes conferring foot rot (Phytophthora capsici sp. nov.) resistance in black pepper (Piper nigrum L.)