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- W2124609286 abstract "Phosphorylation and dephosphorylation of proteins associated with microtubules (MAPs) modulate the functional properties of microtubules (MT). A study was designed to test the hypothesis that ethanol at pharmacologically relevant levels affects phosphorylation of MAPs. Low (6, 12, 24, and 48 mM) and high (96, 384, and 768 mM) levels of ethanol were used in the study. MT prepared from rat brain by successive cycles of assembly-disassembly were found to contain two high molecular weight proteins (MAP2 and MAP1), tubulin, and 70-kDa neurofilament. The kinase activity was determined using [gamma(32)P]ATP as a phosphate donor. The results showed that ethanol primarily stimulated MAP2 phosphorylation. Low levels of ethanol stimulated, whereas high levels decreased, the kinase activity. MAP1 was phosphorylated to a lesser extent. 70-kDa neurofilament and tubulin were phosphorylated, however, the dose-dependent biphasic effect of ethanol on phosphorylation was not found in these cytoskeleton proteins. To determine whether the ethanol-induced kinase activity was cAMP-dependent, the catalytic subunit of cAMP-dependent protein kinase was isolated, purified, and kinase activity was determined with and without ethanol. The results showed that cAMP was not involved in ethanol-induced kinase activity. We conclude that ethanol predominantly stimulates phosphorylation of MAP2 in a dose-dependent manner." @default.
- W2124609286 created "2016-06-24" @default.
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- W2124609286 date "2000-09-01" @default.
- W2124609286 modified "2023-10-13" @default.
- W2124609286 title "LOW LEVELS OF ETHANOL STIMULATE AND HIGH LEVELS DECREASE PHOSPHORYLATION IN MICROTUBULE-ASSOCIATED PROTEINS IN RAT BRAIN: AN IN VITRO STUDY" @default.
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- W2124609286 doi "https://doi.org/10.1093/alcalc/35.5.452" @default.
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