10 deacetylbaccatin iii/taxus cuspidata

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Effects of different elicitors on 10-deacetylbaccatin III-10-O-acetyltransferase activity and cytochrome P450 monooxygenase content in suspension cultures of Taxus cuspidata cells.

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The effects of four elicitors, including 100 μmol/l MeJA (methyl jasmonate), 40 μl/l hydrogen peroxide (30%, w/w), 80 mg/l SA (salicylic acid) and 0.4 g/l F3 (fungal elicitor), on suspension cultures of Taxus cuspidata were studied. After addition of the above four elicitors, the enzyme activity of

Taxol and related compounds in Korean native yews (Taxus cuspidata).

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The concentrations of taxol and related compounds in the bark and needles of Taxus cuspidata grown on Mt. Jiri, Mt. Sobaek, and Cheju Island, and T. cuspidata var. latifolia on Ullung Island in Korea were determined by high performance liquid chromatography (HPLC). The taxane content significantly

Studies on factors influencing stability and recovery of paclitaxel from suspension media and cultures of Taxus cuspidata cv Densiformis by high-performance liquid chromatography.

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An HPLC method was developed for quick scanning of taxanes from large numbers of plant cell suspension samples. The method was optimized for analysis of a range of taxanes of differing polarity. Identification of a standard mixture of paclitaxel and 12 related taxanes was achieved in less than 15

Molecular cloning of a 10-deacetylbaccatin III-10-O-acetyl transferase cDNA from Taxus and functional expression in Escherichia coli.

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The cDNA clone for a 10-deacetylbaccatin III-10-O-acetyl transferase, which catalyzes formation of the last diterpene intermediate in the Taxol biosynthetic pathway, has been isolated from Taxus cuspidata. By using consensus sequences from an assembly of transacylases of plant origin and from many

Accelerated solvent extraction of paclitaxel and related compounds from the bark of taxus cuspidata

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Accelerated solvent extraction (ASE) of paclitaxel and related compounds from Taxus cuspidata (Japanese yew) bark has been investigated under various conditions. In ASE, pressure is applied to the sample extraction cell to maintain the heated solvent in a liquid state during the extraction. This

Expression profiling of genes involved in paclitaxel biosynthesis for targeted metabolic engineering.

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Taxus plant suspension cell cultures provide a sustainable source of paclitaxel (Taxol) for the treatment of many cancers. To develop an optimal bioprocess for paclitaxel supply, taxane biosynthetic pathway regulation must be better understood. Here we examine the expression profile of paclitaxel

Partial purification and characterization of acetyl coenzyme A: taxa-4(20),11(12)-dien-5alpha-ol O-acetyl transferase that catalyzes the first acylation step of taxol biosynthesis.

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The acetylation of taxa-4(20),11(12)-dien-5alpha-ol is considered to be the third specific step of Taxol biosynthesis that precedes further hydroxylation of the taxane nucleus. An operationally soluble acetyl CoA:taxadienol-O-acetyl transferase was demonstrated in extracts of Taxus canadensis and

Rapid separation of four main taxoids in Taxus species by a combined LLP-SPE-HPLC (PAD) procedure.

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A method is described for the simultaneous determination of paclitaxel and three related taxoids, 10-deacetylbaccatin III (10-DAB III), baccatin III, and cephalomannine, in the extracts from the needles of three Chinese yew species, Taxus cuspidata, T. chinensis, and T. media. SPE was applied as the

Simultaneous determination of main taxoids in Taxus needles extracts by solid-phase extraction-high-performance liquid chromatography with pentafluorophenyl column.

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A simple and accurate RP-HPLC method with pentafluorophenyl (PFP) column was developed for the simultaneous determination of six taxoids, i.e. paclitaxel, 10-deacetylbaccatin III (10-DAB III), 7-xylosyl-10-deacetyltaxol (7-xyl-10-DAT), 10-deacetyltaxol (10-DAT), cephalomannine and

The taxol pathway 10-O-acetyltransferase shows regioselective promiscuity with the oxetane hydroxyl of 4-deacetyltaxanes.

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The 10-deacetylbaccatin III:10beta-O-acetyltransferase isolated from Taxus cuspidata regiospecifically transfers short-chain alkanoyl groups from their corresponding CoA thioesters to the C10 hydroxyl of 10-deacetylbaccatin III. This 10-O-acetyltransferase along with five other Taxus

Microbial transformation of cephalomannine by Luteibacter sp.

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Luteibacter sp., a new bacterium isolated from the soil around a Taxus cuspidata Sieb. et Zucc plant, was studied for its capability to metabolize cephalomannine (1). After preparative fermentation, eight metabolites were obtained and characterized as baccatin III (2), baccatin V (3),

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