Glycogen synthesis in the fungus Neurospora crassa
An enzymic activity, obtained from Neurospora crassa, catalyzing the incorporation of [14C]glucose from ADP-[14C]glucose into a glucan of the glycogen type, is described. The properties of the ADPglucose: glycogen glucosyltransferase as compared with those of the already known UDP glucose: glycogen...
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1978
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03044165_v540_n2_p183_Fontana http://hdl.handle.net/20.500.12110/paper_03044165_v540_n2_p183_Fontana |
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| Sumario: | An enzymic activity, obtained from Neurospora crassa, catalyzing the incorporation of [14C]glucose from ADP-[14C]glucose into a glucan of the glycogen type, is described. The properties of the ADPglucose: glycogen glucosyltransferase as compared with those of the already known UDP glucose: glycogen glucosyltransferase were studied. The radioactive products obtained with UDP-[14C]glucose or ADP-[14C]glucose released all the radioactivity as maltose after α or β amylase treatment. Glucose 6-phosphate stimulated the synthetase when UDP-[14C]glucose was the substrate but the stimulation was much greater with ADP-[14C]glucose as glucosyl donor. Glucose 6-phosphate plus EGTA gave maximal stimulation. The system was completely dependent on the presence of a 'primer' of the α 1 → 4 glucan type. © 1978. |
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