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Bladzijde 1 van 157 resultaten
Introduction of tri-antennary N-glycans in Arabidopsis thaliana plants.
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Because the pathway for protein synthesis is largely conserved between plants and animals, plants provide an attractive platform for the cost effective and flexible production of biopharmaceuticals. However, there are some differences in glycosylation between plants and humans that need to be
Complementation of an Arabidopsis thaliana mutant that lacks complex asparagine-linked glycans with the human cDNA encoding N-acetylglucosaminyltransferase I.
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N-Acetylglucosaminyltransferase I (EC 2.4.1.101) initiates the conversion of high-mannose asparagine-linked glycans to complex asparagine-linked glycans in plant as well as in animal cells. This Golgi enzyme is missing in the cgl mutant of Arabidopsis thaliana, and the mutant cells are unable to
Class I alpha-mannosidases are required for N-glycan processing and root development in Arabidopsis thaliana.
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In eukaryotes, class I alpha-mannosidases are involved in early N-glycan processing reactions and in N-glycan-dependent quality control in the endoplasmic reticulum (ER). To investigate the role of these enzymes in plants, we identified the ER-type alpha-mannosidase I (MNS3) and the two
A vacuolar carboxypeptidase mutant of Arabidopsis thaliana is degraded by the ERAD pathway independently of its N-glycan.
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Misfolded proteins produced in the endoplasmic reticulum (ER) are degraded by a mechanism, the ER-associated degradation (ERAD). Here we report establishment of the experimental system to analyze the ERAD in plant cells. Carboxypeptidase Y (CPY) is a vacuolar enzyme and its mutant CPY* is degraded
Myrosinases TGG1 and TGG2 from Arabidopsis thaliana contain exclusively oligomannosidic N-glycans.
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In all eukaryotes N-glycosylation is the most prevalent protein modification of secretory and membrane proteins. Although the N-glycosylation capacity and the individual steps of the N-glycan processing pathway have been well studied in the model plant Arabidopsis thaliana, little attention has been
Metabolic Labeling and Imaging of N-Linked Glycans in Arabidopsis Thaliana.
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Molecular imaging of glycans has been actively pursued in animal systems for the past decades. However, visualization of plant glycans remains underdeveloped, despite that glycosylation is essential for the life cycle of plants. Metabolic glycan labeling in Arabidopsis thaliana by using
Arabidopsis thaliana ALG3 mutant synthesizes immature oligosaccharides in the ER and accumulates unique N-glycans.
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The core oligosaccharide Glc(3)Man(9)GlcNAc(2) is assembled by a series of membrane-bound glycosyltransferases as the lipid carrier dolichylpyrophosphate-linked glycan in the endoplasmic reticulum (ER). The first step of this assembly pathway on the ER luminal side is mediated by ALG3
Two Arabidopsis thaliana Golgi alpha-mannosidase I enzymes are responsible for plant N-glycan maturation.
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N-Glycosylation is an important post-translational modification that occurs in many secreted and membrane proteins in eukaryotic cells. Golgi alpha-mannosidase I hydrolases (MANI) are key enzymes that play a role in the early N-glycan modification pathway in the Golgi apparatus. In Arabidopsis
Production of active human glucocerebrosidase in seeds of Arabidopsis thaliana complex-glycan-deficient (cgl) plants.
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There is a clear need for efficient methods to produce protein therapeutics requiring mannose-termination for therapeutic efficacy. Here we report on a unique system for production of active human lysosomal acid β-glucosidase (glucocerebrosidase, GCase, EC 3.2.1.45) using seeds of the Arabidopsis
Molecular cloning and characterization of Arabidopsis thaliana Golgi alpha-mannosidase II, a key enzyme in the formation of complex N-glycans in plants.
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N-glycosylation is one of the major post-translational modifications of proteins in eukaryotes; however, the processing reactions of oligomannosidic N-glycan precursors leading to hybrid-type and finally complex-type N-glycans are not fully understood in plants. To investigate the role of Golgi
Double-knockout of putative endo-β-N-acetylglucosaminidase (ENGase) genes in Arabidopsis thaliana: loss of ENGase activity induced accumulation of high-mannose type free N-glycans bearing N,N'-acetylchitobiosyl unit.
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Endo-β-N-acetylglucosaminidase (ENGase) is involved in the production of high-mannose type free N-glycans during plant development and fruit maturation. In a previous study (K. Nakamura et al. Biosci. Biotechnol. Biochem., 73, 461-464 (2009)), we identified the tomato ENGase gene and found that gene
The two endo-β-N-acetylglucosaminidase genes from Arabidopsis thaliana encode cytoplasmic enzymes controlling free N-glycan levels.
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Endo-β-N-acetylglucosaminidases (ENGases) cleave N-glycans from proteins and/or peptides by hydrolyzing the O-glycosidic linkage between the two core-N-acetylglucosamine (GlcNAc) residues. Although, two homologous genes potentially encoding ENGases have been identified in Arabidopsis thaliana, their
Expanding the Scope of Metabolic Glycan Labeling in Arabidopsis thaliana.
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Metabolic glycan labeling (MGL) has gained wide utility and has become a useful tool for probing glycosylation in living systems. For the past three decades, the development and application of MGL have mostly focused on animal glycosylation. Recently, exploiting MGL for studying plant glycosylation
Arabidopsis thaliana FLA4 functions as a glycan-stabilized soluble factor via its carboxy-proximal Fasciclin 1 domain.
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Fasciclin-like arabinogalactan proteins (FLAs) are involved in numerous important functions in plants but the relevance of their complex structure to physiological function and cellular fate is unresolved. Using a fully functional fluorescent version of Arabidopsis thaliana FLA4 we show that this
Glycan-binding F-box protein from Arabidopsis thaliana protects plants from Pseudomonas syringae infection.
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A small group of F-box proteins consisting of a conserved F-box domain linked to a domain homologous to the glycan-binding protein has been identified within the genome of Arabidopsis thaliana. Previously, the so-called F-box-Nictaba protein, encoded by the gene At2g02360, was shown to be a
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