sitosterol/arabidopsis thaliana

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Vitamin D5 in Arabidopsis thaliana.

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Vitamin D3 is a secosterol hormone critical for bone growth and calcium homeostasis, produced in vertebrate skin by photolytic conversion of the cholesterol biosynthetic intermediate provitamin D3. Insufficient levels of vitamin D3 especially in the case of low solar UV-B irradiation is often

The responses of Arabidopsis thaliana to cadmium exposure explored via metabolite profiling.

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The metabolic responses of Arabidopsis thaliana to cadmium exposure was characterized in this study. A. thaliana was cultivated in medium contaminated with different cadmium concentrations (0, 5 and 50microM, respectively) for 2weeks. Metabolite analyses were performed using gas chromatography-mass

A role for beta-sitosterol to stigmasterol conversion in plant-pathogen interactions.

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Upon inoculation with pathogenic microbes, plants induce an array of metabolic changes that potentially contribute to induced resistance or even enhance susceptibility. When analysing leaf lipid composition during the Arabidopsis thaliana-Pseudomonas syringae interaction, we found that accumulation

Overexpression of CYP710A1 and CYP710A4 in transgenic Arabidopsis plants increases the level of stigmasterol at the expense of sitosterol.

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Sitosterol and stigmasterol are major sterols in vascular plants. An altered stigmasterol:sitosterol ratio has been proposed to influence the properties of cell membranes, particularly in relation to various stresses, but biosynthesis of stigmasterol is poorly understood. Recently, however, Morikawa

Sugar availability modulates polyisoprenoid and phytosterol profiles in Arabidopsis thaliana hairy root culture.

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Sugars are recognized as signaling molecules regulating the biosynthesis of secondary metabolites in plants. Here, a modulatory effect of sugars on dolichol and phytosterol profiles was noted in the hairy roots of Arabidopsis thaliana. Arabidopsis roots contain a complex dolichol mixture comprising

The Arabidopsis thaliana type I Isopentenyl Diphosphate Isomerases are targeted to multiple subcellular compartments and have overlapping functions in isoprenoid biosynthesis.

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To form the building blocks of isoprenoids, isopentenyl diphosphate (IPP) isomerase activity, which converts IPP to dimethylallyl diphosphate (DMAPP), appears to be necessary in cytosol, plastids, and mitochondria. Arabidopsis thaliana contains only two IPP isomerases (Isopentenyl Diphosphate

AtCYP710A1 gene-mediated stigmasterol production plays a role in imparting temperature stress tolerance in Arabidopsis thaliana.

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Stigmasterol and sitosterol, important sterols present in plants, are known to influence permeability and fluidity characteristics of the plasma membrane and other organellar membranes. We had previously demonstrated that the Arabidopsis Atcyp710A1 gene, which catalyzes conversion of sitosterol into

The Arabidopsis thaliana FPP synthase isozymes have overlapping and specific functions in isoprenoid biosynthesis, and complete loss of FPP synthase activity causes early developmental arrest.

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Farnesyl diphosphate (FPP) synthase (FPS) catalyses the synthesis of FPP, the major substrate used by cytosolic and mitochondrial branches of the isoprenoid pathway. Arabidopsis contains two farnesyl diphosphate synthase genes, FPS1 and FPS2, that encode isozymes FPS1L (mitochondrial), FPS1S and

Arabidopsis cyp51 mutant shows postembryonic seedling lethality associated with lack of membrane integrity.

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CYP51 exists in all organisms that synthesize sterols de novo. Plant CYP51 encodes an obtusifoliol 14alpha-demethylase involved in the postsqualene sterol biosynthetic pathway. According to the current gene annotation, the Arabidopsis (Arabidopsis thaliana) genome contains two putative CYP51 genes,

Molecular characterization and functional analysis of Glycine max sterol methyl transferase 2 genes involved in plant membrane sterol biosynthesis.

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Sterol C24 methyltransferase (SMT2) genes governing the pattern of phytosterols synthesized in higher plants have been studied in Glycine seedlings and wild-type and engineered Arabidopsis thaliana plants. The SMT2 genes of soybean (SMT2-1 and SMT2-2) previously cloned and characterized (Neelakandan

Metabolic engineering of soybean affords improved phytosterol seed traits.

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Different combinations of three rate-limiting enzymes in phytosterol biosynthesis, the Arabidopsis thaliana hydroxyl methylglutaryl CoA1 (HMGR1) catalytic subunit linked to either constitutive or seed-specific β-conglycinin promoter, and the Glycine max sterol methyltransferase1 (SMT1) and sterol

Cloning and expression of two sterol C-24 methyltransferase genes from upland cotton (Gossypium hirsuturm L.).

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Brassinosteroids (BRs) are an important class of plant steroidal hormones that are essential in a wide variety of physiological processes. Two kinds of intermediates, sitosterol and campesterol, play a crucial role in cell elongation, cellulose biosynthesis, and accumulation. To illuminate the

Plant sterol-C24-methyl transferases: different profiles of tobacco transformed with SMT1 or SMT2.

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Higher plant cells contain a mixture of 24-desmethyl, 24-methyl(ene), and 24-ethyl(idene) sterols in given proportions according to species but also to cell type. As a first step to investigate the function of such sterol compositions in the physiology of a plant, we have illustrated in the present

Biochemical modifications and transcriptional alterations attendant to sterol feeding in Phytophthora parasitica.

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Phytophthora species are eukaryotic sterol auxotrophs that possess the ability to grow, albeit poorly, in the complete absence of sterols. Growth of Phytophthora is often improved substantially when an exogenous source of sterol is provided. Additionally, sterols may be required for sexual and

Inhibition of Phytosterol Biosynthesis by Azasterols.

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Inhibitors of enzymes in essential cellular pathways are potent probes to decipher intricate physiological functions of biomolecules. The analysis of Arabidopsis thaliana sterol profiles upon treatment with a series of azasterols reveals a specific in vivo inhibition of SMT2, a plant

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