International journal of andrology, 15(4), 345-354 (1992-08-01)
The functional interaction of the estrogen-induced uterine enzyme glycerylphosphorylcholine (GPC) diesterase with epididymal rat sperm before and after incubation under capacitating conditions was investigated indirectly, by measuring the glycerol phosphate (GP) released on enzymatic hydrolysis of GPC and using oxygen
Biochimica et biophysica acta, 1150(1), 25-34 (1993-07-25)
In isolated inner medullary collecting duct (IMCD) cells requirements for the organic osmolyte glycerophosphorylcholine (GPC) vary with extracellular osmolality. To investigate mechanisms of osmotic adaptation GPC metabolism was studied under different osmotic conditions. In contrast to the GPC precursors choline
Inhibition of a Zn(2+)-glycerophosphocholine cholinephosphodiesterase by thiols or tellurites were examined mechanistically. Inactivation of the phosphodiesterase by thio-carboxylates, which was due to the removal of Zn2+ in the catalytic site, was enhanced by introduction of an amino group in the
An enzyme releasing phosphocholine from glycerophosphocholine was purified to apparent homogeneity based upon SDS-PAGE. The enzyme was liberated from lyophilized bovine myelin by differential detergent extraction and final purification was accomplished with Q-Sepharose Fast Flow chromatography yielding an apparently homogeneous
Previous studies have demonstrated elevated brain levels of phosphomonoesters in early stages of Alzheimer's disease and elevations of phosphodiesters later in the disease. In addition, preliminary quantitative analyses of the phospholipids of Alzheimer's brain reveals either decreases in some phospholipids
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