PMID: 9546053Apr 18, 1998Paper

Interaction of M1 and M2 isozymes pyruvate kinase from human tissues with phospholipids

Biochimica Et Biophysica Acta
A DabrowskaR Danielewicz

Abstract

The effect of pH and the presence of FBP on the interaction of skeletal muscle (PK-M1) and kidney or tumor meningioma (PK-M2) pyruvate kinase with the phospholipids liposomes were investigated by ultracentrifugation and steady-state kinetics and were compared with those results obtained using the bovine heart (PK-M1) isoenzyme which we previously studied. Pyruvate kinase specific activity increases upon the interaction with liposomes. The activation is specifically sensitive to presence of phosphatidylserine (PS) in liposomes. Liposomes made of phosphatidylcholine + phosphatidylserine mixture are good adsorptive systems for both human and bovine of M-type isozymes at low ionic strength. Interaction of PK-M1 with PS liposomes results in the change of Vmax and K(m) values for PEP without marked effect on Hill coefficients. Addition of PS liposomes to PK-M2 induces hyperbolic saturation curves for PEP.

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Citations

Jun 16, 2004·Biochimica Et Biophysica Acta·Tatiana Galetto RosaClóvis Milton Duval Wannmacher
Mar 26, 2003·FEBS Letters·Francesc R Garcia-GonzaloJose Luis Rosa
Feb 27, 2008·Genes to Cells : Devoted to Molecular & Cellular Mechanisms·Nobukazu ShimadaShunsuke Ishii

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