EC Number   |
Protein Variants |
Reference |
|---|
   4.2.3.57 | more |
gene OkBCS silencing in Ocimum kilimandscharicum plants via Agrobacterium tumefaciens strain GV3101 mediated transfection. beta-Caryophyllene and alpha-humulene levels decrease by about 20% in silenced plants compared to controls. The silencing effect is more prominent in systemic leaves with 95% reduction in OkBCS transcripts against 51% decrease in local leaves |
746974 |
| 4.2.3.57 | more |
in a robustly acetate-utilizing Escherichia coli strain, acetyl-CoA synthase (ACS), Artemisia annua beta-caryophyllene synthase (QHS1) and geranyl diphosphate synthase (GPPS2) are co-expressed to establish the engineered strain converting acetic acid to beta-caryophyllene. To further enhance beta-caryophyllene production from acetic acid, the heterologous mevalonate pathway is introduced into the cells. Acetoacetyl-CoA synthase (AACS) is also expressed in the cells to increase the precursor acetoacetyl-CoA and accordingly resulted in the increase of beta-caryophyllene. The final genetically modified strain, YJM67, accumulates the production of biomass and beta-caryophyllene up to 12.6 and 1.05 g/l during 72 h, respectively, with a specific productivity of 1.15 mg/h/g dry cells, and the conversion efficiency of acetic acid to beta-caryophyllene (gram to gram) reaching 2.1%. The yield of beta-caryophyllene on acetic acid of this strain also reaches about 5.6 % of the theoretical yield. A pH-coupled HAc fed-batch fermentation in large scale production of beta-caryophyllene |
748587 |
| 4.2.3.57 | more |
production of beta-caryophyllene by assembling a biosynthetic pathway in an engineered Escherichia coli strain of which phosphoglucose isomerase gene has been deleted. The 1-deoxy-D-xylulose 5-phosphate (DXP) or heterologous mevalonate (MVA) pathways are employed. Geranyl diphosphate synthase (GPPS2 gene from Abies grandis), glucose-6-phosphate dehydrogenase (G6PDH gene), and beta-caryophyllene synthase genes are co-overexpressed in the engineered strain. The final genetically modified strain, YJM59, produces 220 mg/l of beta-caryophyllene in flask culture. Evaluation of fed-batch fermentation for the production of beta-caryophyllene. After induction for 60 h, the YJM59 strain produces beta-caryophyllene at a concentration of 1520 mg/l. The volumetric production fermented in the aerobic fed-batch is 0.34 mg/(l/h/OD600) and the conversion efficiency of glucose to beta-caryophyllene (gram to gram) is 1.69%. Method evaluation with beta-caryophyllene synthases from different origins, QHS1 from Artemisia annua is the most effective of the three enzymes, compared to TPS21 from Arabidopsis thaliana and TPS23 from Zea perennis. Substrate channeling |
749271 |
