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Stranica 1 iz 20 rezultatima
DOLICHOL PHOSPHATE MANNOSE SYNTHASE1 mediates the biogenesis of isoprenyl-linked glycans and influences development, stress response, and ammonium hypersensitivity in Arabidopsis.
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The most abundant posttranslational modification in nature is the attachment of preassembled high-mannose-type glycans, which determines the fate and localization of the modified protein and modulates the biological functions of glycosylphosphatidylinositol-anchored and N-glycosylated proteins. In
An alternative cis-isoprenyltransferase activity in yeast that produces polyisoprenols with chain lengths similar to mammalian dolichols.
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Dolichyl monophosphate (Dol-P) is a polyisoprenoid glycosyl carrier lipid essential for the assembly of a variety of glycoconjugates in the endoplasmic reticulum of eukaryotic cells. In yeast, dolichols with chain lengths of 14--17 isoprene units are predominant, whereas in mammalian cells they
Modeling of Dolichol Mass Spectra Isotopic Envelopes as a Tool to Monitor Isoprenoid Biosynthesis.
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The cooperation of the mevalonate (MVA) and methylerythritol phosphate (MEP) pathways, operating in parallel in plants to generate isoprenoid precursors, has been studied extensively. Elucidation of the isoprenoid metabolic pathways is indispensable for the rational design of plant and microbial
Arabidopsis DOK1 encodes a functional dolichol kinase involved in reproduction.
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Dolichol phosphate (Dol-P) serves as a carrier of complex polysaccharides during protein glycosylation. Dol-P is synthesized by the phosphorylation of dolichol or the monodephosphorylation of dolichol pyrophosphate (Dol-PP); however, the enzymes that catalyze these reactions remain unidentified in
Dolichol biosynthesis and its effects on the unfolded protein response and abiotic stress resistance in Arabidopsis.
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Dolichols are long-chain unsaturated polyisoprenoids with multiple cellular functions, such as serving as lipid carriers of sugars used for protein glycosylation, which affects protein trafficking in the endoplasmic reticulum. The biological functions of dolichols in plants are largely unknown. We
Characterization of dehydrodolichyl diphosphate synthase of Arabidopsis thaliana, a key enzyme in dolichol biosynthesis.
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The enzyme dehydrodolichyl diphosphate (dedol-PP) synthase is a cis-prenyltransferase that catalyzes the synthesis of dedol-PP, the long-chain polyprenyl diphosphate used as a precursor for the synthesis of dolichyl phosphate. Here we report the cloning and characterization of a cDNA from
Arabidopsis dolichol kinase AtDOK1 is involved in flowering time control.
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Dolichols are a class of isoprenoids that consist of highly polymerized and unsaturated long-chain isoprenes. They play crucial roles in protein glycosylation including N-glycosylation, because the oligosaccharide is assembled on a lipid carrier, dolichyl diphosphate. Arabidopsis DOLICHOL KINASE 1,
Proteins are polyisoprenylated in Arabidopsis thaliana.
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Isoprenoid lipids were found to be covalently linked to proteins of Arabidopsis thaliana. Their identity (polyprenols: Prenol-9-11 with Pren-10 dominating and dolichols: Dol-15-17 with Dol-16 dominating) was confirmed by means of HPLC/ESI-MS with application of the multiple reaction monitoring
Identification and characterization of a cis,trans-mixed heptaprenyl diphosphate synthase from Arabidopsis thaliana.
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In eukaryotes, dolichols (C(70-120)) play indispensable roles as glycosyl carrier lipids in the biosynthesis of glycoproteins on endoplasmic reticulum. In addition to dolichols, seed plants have other types of Z,E-mixed polyisoprenoids termed ficaprenol (tri-trans,poly-cis-polyprenol, C(45-75)) and
Construction of a binary vector for transformation of Arabidopsis thaliana with a new selection marker.
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A new binary vector, pZT4B, containing the UDP-N-acetylglucosamine: dolichol phosphate N-acetylglucosamine-1-P transferase (GPT) gene as a selection marker, was constructed. The green fluorescent protein (GFP) gene was inserted into pZT4B, and the resulting plasmid was used in the transformation of
Development of a series of gateway binary vectors possessing a tunicamycin resistance gene as a marker for the transformation of Arabidopsis thaliana.
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We made two series of Gateway binary vectors, pGWBs and R4pGWBs, possessing a UDP-N-acetylglucosamine: dolichol phosphate N-acetylglucosamine-1-P transferase (GPT) gene driven by the nopaline synthase promoter (Pnos) as a tunicamycin resistance marker for the transformation of Arabidopsis thaliana.
POLYPRENOL REDUCTASE2 Deficiency Is Lethal in Arabidopsis Due to Male Sterility.
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Dolichol is a required cofactor for protein glycosylation, the most common posttranslational modification modulating the stability and biological activity of proteins in all eukaryotic cells. We have identified and characterized two genes, PPRD1 and -2, which are orthologous to human SRD5A3 (steroid
Arabidopsis thaliana alpha1,2-glucosyltransferase (ALG10) is required for efficient N-glycosylation and leaf growth.
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Assembly of the dolichol-linked oligosaccharide precursor (Glc(3) Man(9) GlcNAc(2) ) is highly conserved among eukaryotes. In contrast to yeast and mammals, little is known about the biosynthesis of dolichol-linked oligosaccharides and the transfer to asparagine residues of nascent polypeptides in
A mutation in Asparagine-Linked Glycosylation 12 (ALG12) leads to receptor misglycosylation and attenuated responses to multiple microbial elicitors
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Changes in cellular calcium levels are one of the earliest signalling events in plants exposed to pathogens or other exogenous factors. In a genetic screen, we identified an Arabidopsis thaliana 'changed calcium elevation 1' (cce1) mutant with attenuated calcium response to the bacterial flagellin
Long-Chain Polyisoprenoids Are Synthesized by AtCPT1 in Arabidopsis thaliana.
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Arabidopsis roots accumulate a complex mixture of dolichols composed of three families, (i.e., short-, medium- and long-chain dolichols), but until now none of the cis-prenyltransferases (CPTs) predicted in the Arabidopsis genome has been considered responsible for their synthesis. In this
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