Some kinetic and molecular properties of yeast phosphofructokinase.
Yeast PFK had a sedimentation coefficient of 16.7 S both in the absence and in the presence of ATP, and did not dissociate even at very low protein concentrations. Sodium dodecyl-sulphate caused dissociation of the protein to sub-units of 3.2 S.The effects of pH on substrate affinities are described. In the presence of UTP, acting as non-inhibiting phosphate donor, the behaviour of the enzyme towards F-6-P was co-operative, with a Hill coefficient of 2.2.
Kopperschläger
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Institute of Physiological Chemistry, Karl-Marx-University, Leipzig, Germany
Freyer
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Diezel
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Hofmann
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