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Page 1 de 19 résultats
Expression of various biotin-binding proteins in transgenic tobacco confers resistance to potato tuber moth, Phthorimaea operculella (Zeller) (fam. Gelechiidae).
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The high affinity biotin-binding proteins (BBPs) avidin and streptavidin are established insecticidal agents, effective against a range of insect pests. Earlier work showed that, when expressed in planta, full length avidin and a truncated form of streptavidin are highly insecticidal. More recently,
Transgenic tobacco and apple plants expressing biotin-binding proteins are resistant to two cosmopolitan insect pests, potato tuber moth and lightbrown apple moth, respectively.
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Tobacco (Nicotiana tabacum cv. Samsun) and apple (Malus x domestica cv. Royal Gala) plants expressing avidin or strepavidin were produced using Agrobacterium tumefaciens-mediated transformation. ELISA assays showed that avidin expression ranged from 3.1 to 4.6 microM in tobacco and from 1.9 to 11.2
Antisense expression and overexpression of biotin carboxylase in tobacco leaves.
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The plastid acetyl-coenzyme A carboxylase (ACCase) catalyzes the first committed step of fatty acid synthesis and in most plants is present as a heteromeric complex of at least four different protein subunits: the biotin carboxylase (BC), the biotin carboxyl carrier protein, and the alpha and beta
Increased sesqui- and triterpene production by co-expression of HMG-CoA reductase and biotin carboxyl carrier protein in tobacco (Nicotiana benthamiana).
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Terpenoids are the most diverse natural products with many industrial applications and are all synthesized from simple precursors, isopentenyl diphosphate (IPP) and its isomer dimethylallyl diphosphate (DMAPP). In plants, IPP is synthesized by two distinct metabolic pathways - cytosolic mevalonate
Structural analysis, plastid localization, and expression of the biotin carboxylase subunit of acetyl-coenzyme A carboxylase from tobacco.
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Acetyl-coenzyme A carboxylase (ACCase, EC 6.4.1.2) catalyzes the synthesis of malonyl-coenzyme A, which is utilized in the plastid for de novo fatty acid synthesis and outside the plastid for a variety of reactions, including the synthesis of very long chain fatty acids and flavonoids. Recent
Co-purification, co-imniunoprecipitation, and coordinate expression of acetyl-coenzyme A carboxylase activity, biotin carboxylase, and biotin carboxyl carrier protein of higher plants.
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Acetyl-CoA carboxylase (ACCase; EC 6.4.1.2) is a regulatory enzyme of fatty acid synthesis, and in some higher-plant plastids is a multi-subunit complex consisting of biotin carboxylase (BC), biotin-carboxyl carrier protein (BCCP), and carboxyl transferase (CT). We recently described a Nicotiana
In planta proximity-dependent biotin identification (BioID) identifies a TMV replication co-chaperone NbSGT1 in the vicinity of 126 kDa replicase.
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Tobacco mosaic virus (TMV) is a positive, single-stranded RNA virus. It encodes two replicases (126 kDa and 183 kDa), a movement protein and a coat protein. These proteins interact with host proteins for successful infection. Some host proteins such as eEF1α, Tm-1, TOM1, 14-3-3 proteins directly
Comparative quantitation of abscisic acid in plant extracts by gas-liquid chromatography and an enzyme-linked immunosorbent assay using the avidin-biotin system.
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In this report we describe an enzyme-linked immunosorbent assay (ELISA) for the quantitation of abscisic acid (ABA) in plant extracts. A microtitration plate is coated with an ABA-protein complex. The ABA, standard or sample, is then added to each well with a limiting quantity of rabbit anti-ABA
Biological activity of reducing-end-derivatized oligogalacturonides in tobacco tissue cultures.
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The biological activity of reducing-end-modified oligogalacturonides was quantified in four tobacco (Nicotiana tabacum) tissue culture bioassays. The derivatives used were oligogalacturonides with the C-1 of their reducing end (a) covalently linked to a biotin hydrazide, (b) covalently linked to
Recombinant hHscFv-RC-RNase protein derived from transgenic tobacco acts as a bifunctional molecular complex against hepatocellular carcinoma.
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Hepatocellular carcinoma (HCC) is a common clinical primary malignant tumor; however, efficient drugs for the treatment of HCC are still lacking at the present time. To develop a new approach for liver cancer therapy, we designed a chimeric gene (his-HR) encoding a single-chain variable fragment of
Labeling and enrichment of Arabidopsis thaliana matrix metalloproteases using an active-site directed, marimastat-based photoreactive probe.
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Matrix metalloproteases (MMPs) are secreted or membrane-bound zinc-containing proteases that play diverse roles in development and immunity in plants and in tissue remodeling in animals. We developed a photoreactive probe based on the MMP inhibitor marimastat, conjugated to a
Identification of Cannabis sativa L. using the 1-kbTHCA synthase-fluorescence in situ hybridization probe.
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This study reports a successful application of fluorescence in situ hybridization (FISH) technique in the identification of Cannabis sativa L. cells recovered from fresh and dried powdered plant materials. Two biotin-16-dUTP-labeled FISH probes were designed from the Cannabis-specific
Detection of glycosyl-phosphatidylinositol-anchored proteins on the surface of Nicotiana tabacum protoplasts.
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Glycosyl-phosphatidylinositol (GPI)-anchored plasma membrane proteins have been found to be widespread in eukaryotes and protozoa but have not been reported in higher terrestrial plants. A sensitive biotin-based assay has been used to detect the presence of GPI-anchored proteins on the outer surface
Transglutaminase activity changes during the hypersensitive reaction, a typical defense response of tobacco NN plants to TMV.
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The occurrence of glutamyl polyamines (PAs) and changes in activity and levels of transglutaminase (TGase, EC 2.3.2.13), the enzyme responsible for their synthesis, are reported during the progression of the hypersensitive reaction (HR) of resistant NN tobacco plants (Nicotiana tabacum L. cv.
SAM levels, gene expression of SAM synthetase, methionine synthase and ACC oxidase, and ethylene emission from N. suaveolens flowers.
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S'adenosyl-L: -methionine (SAM) is a ubiquitous methyl donor and a precursor in the biosynthesis of ethylene, polyamines, biotin, and nicotianamine in plants. Only limited information is available regarding its synthesis (SAM cycle) and its concentrations in plant tissues. The SAM concentrations in
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