Amp Is a More Potent Activator of Phosphofructokinase-1 Activity Than Fructose 2,6-Bisphospate in Porcine Skeletal Muscle Under Simulated Post Mortem Conditions

S.S. Chauhan; M.N. LeMaster; E.M. England

Amp Is a More Potent Activator of Phosphofructokinase-1 Activity Than Fructose 2,6-Bisphospate in Porcine Skeletal Muscle Under Simulated Post Mortem Conditions

In: 63rd International Congress of Meat Science and Technology

Authors:

S.S. Chauhan

S.S. Chauhan Department of Animal Sciences, The Ohio State University, Columbus, Ohio 43210, USA; england.146@osu.edu

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M.N. LeMaster

M.N. LeMaster Department of Animal Sciences, The Ohio State University, Columbus, Ohio 43210, USA; england.146@osu.edu

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E.M. England

E.M. England Department of Animal Sciences, The Ohio State University, Columbus, Ohio 43210, USA; england.146@osu.edu

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Type:: Chapter

Pages:: 893–894

DOI:: https://doi.org/10.3920/9789086868605_401

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Phosphofructokinase-1 (PFK-1) is a key regulatory enzyme of post mortem glycolysis. PFK-1’s activity is regulated ante mortem by a number of compounds including adenosine monophosphate (AMP) and fructose 2,6-bisphosphate (F-2,6- BP). However, PFK-1’s post mortem regulation by AMP and F-2,6-BP is still unclear. Therefore, a study was conducted where porcine longissimus lumborum samples were collected to determine PFK-1 activity as affected by various concentrations of AMP and F-2,6-BP at buffered pH. Both compounds increased PFK-1 activity. However, at physiological concentrations, 50 and 150 µM AMP increased PFK-1 activity compared to 1 and 2 µM F-2,6-BP. Thus, AMP may play a greater role in dictating the rate and extent of post mortem glycolysis and pH decline than F-2,6-BP.

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63rd International Congress of Meat Science and Technology

Nurturing locally, growing globally

E-Book ISBN:: 9789086868605

Publisher:: Wageningen Academic

Print Publication Date:: 15 Nov 2017

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- Life Sciences

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Amp Is a More Potent Activator of Phosphofructokinase-1 Activity Than Fructose 2,6-Bisphospate in Porcine Skeletal Muscle Under Simulated Post Mortem Conditions

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63rd International Congress of Meat Science and Technology

Nurturing locally, growing globally

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