Yuya Taguchi

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The glycosylation of asparagine residues is the predominant protein modification in all three domains of life. An oligosaccharide chain is preassembled on a lipid-phospho carrier and transferred onto asparagine residues by the action of a membrane-bound enzyme, oligosaccharyltransferase. The oligosaccharide donor for the oligosaccharyl transfer reaction is(More)
In mammals, the Golgi apparatus is disassembled early mitosis and reassembled at the end of mitosis. For Golgi disassembly, membrane fusion needs to be blocked. Golgi biogenesis requires two distinct p97ATPase-mediated membrane fusion, the p97/p47 and p97/p37 pathways. We previously reported that p47 phosphorylation on Serine-140 and p37 phosphorylation on(More)
The oligosaccharyltransferase PglB from Campylobacter jejuni catalyses the N-glycosylation reaction with undecaprenyl-pyrophosphate-linked Glc1 GalNAc5 Bac1 (Und-PP-Glc1 GalNAc5 Bac1 ). Experiments using chemically synthesized donors coupled to fluorescently tagged peptides confirmed that biosynthetic intermediate Und-PP-Bac1 and Und-PP-GalNAc2 Bac1 are(More)
It is reported that the rate of elderly person in the total population of Japan is about 21.5% in 2007. Thus, the recent society of Japan is called as “Elderly Society”. In the society, many elderly people work or enjoy walking to keep health. However, some problems with respect to stumble over of elderly people are occurred. That is to say,(More)
DNA polymerase (EC 2.7.7.7) beta was purified to near homogeneity from chick embryos. The final preparation has a specific enzyme activity of 1,100,000 units (nanomoles of dTMP incorporation/h) per mg of protein with (rA)n X (dT)12-18 as a template-primer. The molecular weight of DNA polymerase beta is about 40,000 as judged by gel filtration on Sephadex(More)
Mouse myeloma DNA polymerase gamma was extensively purified to a final specific activity of 156 000 units (nmol dTMP incorporation per h) per mg protein on (rA)n.(dT)12-18 as a template primer. Sodium dodecyl sulfate polyacrylamide gel electrophoresis of protein fractions obtained by DNA-cellulose column chromatography revealed that the amount of a(More)
Oligosaccharyltransferase (OST) transfers an oligosaccharide chain to the Asn residue in the Asn-X-Ser/Thr sequon in proteins, where X is not proline. A sequon was tethered to an archaeal OST enzyme via a disulfide bond. The positions of the cysteine residues in the OST protein and the sequon-containing acceptor peptide were selected by reference to the(More)
Pyrobaculum calidifontis is a hyperthermophilic archaeon that belongs to the phylum Crenarchaeota. In contrast to the phylum Euryarchaeota, only the N-glycan structure of the genus Sulfolobus is known in Crenarchaeota. Here, we enriched glycoproteins from cultured P. calidifontis cells, by ConA lectin chromatography. The MASCOT search identified proteins(More)
Steady-state kinetic studies of DNA polymerase alpha purified from mouse myeloma MOPC104E cells have been carried out. The results of initial velocity analysis with or without sodium pyrophosphate, a product inhibitor, indicated that the reaction mechanism of this enzyme can be categorized as an ordered Bi Bi type where the concentration of the ternary(More)
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