An activation factor of liver phosphofructokinase

E. Furuya, K. Uyeda

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Pure phosphofructokinase (ATP:D-fructose-6-phosphate 1-phosphotransferase, EC from liver is strongly inhibited by ATP, whereas crude phosphofructokinase is only slightly inhibited by ATP. A factor that is removed from the enzyme during purification and can prevent the inhibition of phosphofructokinase by ATP has been isolated. The factor can be resolved into three components that differ in molecular weights, as shown by gel filtration on Sephadex G-25. These factors overcome the ATP inhibition but have no effects on the catalytic activity under the optimum assay conditions. Furthermore, AMP acts synergistically with the activation factor in reversing ATP inhibition. It is proposed that the activation of phosphofructokinase by the activation factor and AMP is sufficient to account for the glycolytic flux in the liver.

Original languageEnglish (US)
Pages (from-to)5861-5864
Number of pages4
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number10 II
StatePublished - 1980

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