Autophosphorylation of yeast hexokinase PII
- PMID: 3076185
- DOI: 10.1099/00221287-134-9-2493
Autophosphorylation of yeast hexokinase PII
Abstract
Autophosphorylation of hexokinase PII was studied using an enzyme purified from Saccharomyces cerevisiae. Incubation of this enzyme preparation with [gamma-32P]ATP and Mn2+ or Mg2+ gave a phosphoprotein of molecular mass 58,000 which corresponded to hexokinase PII. D-Xylose stimulated autophosphorylation of hexokinase PII. Dilution of hexokinase PII over a 10-fold concentration range did not change the specific activity of hexokinase PII autophosphorylation suggesting that it may occur by an intramolecular mechanism.