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- W2052491294 abstract "Pyruvate kinase exhibits allosteric properties. The allosteric effect of fructose 1,6-bisphosphate (FBP) on phosphoenolpyruvate (PEP) binding to rabbit muscle pyruvate kinase (PK) in the presence of various ions (Mg(2+), Mn(2+), K(+), Na(+)) was studied by attenuated total reflection infrared spectroscopy in combination with a dialysis accessory. The experiments indicated that FBP binding causes conformational changes of PK that are of the same order of magnitude as those of PEP binding. The conformational change of PEP binding to PK/Mg(2+)/K(+) in the presence of FBP was about twice as large as in its absence, which is tentatively ascribed to a higher occupancy of the closed state. The affinity for PEP increased in the presence of Mg(2+) and K(+). No such effects were observed with the other ion combinations Mn(2+)/K(+) and Mg(2+)/Na(+) or in D(2)O (with Mg(2+)/K(+)), and therefore we did not detect an allosteric effect on PEP binding under these conditions." @default.
- W2052491294 created "2016-06-24" @default.
- W2052491294 creator A5040405350 @default.
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- W2052491294 date "2011-09-09" @default.
- W2052491294 modified "2023-09-30" @default.
- W2052491294 title "The Allosteric Effect of Fructose Bisphosphate on Muscle Pyruvate Kinase Studied by Infrared Spectroscopy" @default.
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- W2052491294 doi "https://doi.org/10.1021/jp206272x" @default.
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