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- W2011484772 abstract "The rates of synthesis of dolichol-linked oligosaccharide intermediates and protein N-glycosylation increased substantially during a developmental period corresponding to glial differentiation in primary cultures of embryonic rat brain. In this study developmental changes in three enzymes involved in dolichyl phosphate (Dol-P) metabolism have been examined by in vitro assays and correlated with the induction pattern for lipid intermediate synthesis and protein N-glycosylation. Dolichyl pyrophosphate (Dol-P-P) phosphatase activity was relatively low during the first 9 days in culture, but it increased significantly between days 9 and 25. Dol-P-P phosphatase did not change appreciably between days 22 and 30 in culture. A kinetic analysis of the developmental change in Dol-P-P phosphatase activity revealed that the Vmax increased 10-fold between days 4 and 22, and there was also a significant change in the apparent Km for Dol-P-P. Dolichol kinase activity increased during the period (9-15 days) when there was a significant induction in oligosaccharide-lipid synthesis and protein N-glycosylation, and then declined in parallel with lipid intermediate synthesis and protein N-glycosylation. Dol-P phosphatase activity was present at relatively low levels for the first 9 days in culture, but it increased steadily between days 9 and 30. A kinetic comparison of the activity in membrane fractions from brain cells cultured for 9 and 25 days indicated that there was a 10-fold increase in enzyme protein with unaltered affinity for Dol-P.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2011484772 date "1991-01-01" @default.
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- W2011484772 title "Developmental Changes in Enzymes Involved in Dolichyl Phosphate Metabolism in Cultured Embryonic Rat Brain Cells" @default.
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- W2011484772 doi "https://doi.org/10.1111/j.1471-4159.1991.tb02600.x" @default.
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