Fructose 2,6-bisphosphate and the regulation of pyrophosphate-dependent phosphofructokinase activity in germinating pea seeds |
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Authors: | Wu M X Smyth D A Black C C |
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Institution: | Biochemistry Department, University of Georgia, Athens, Georgia 30602. |
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Abstract: | The activity of pyrophosphate: d-fructose-6-phosphate-1-phosphotransferase (EC 2.7.1.90, PPi-PFK) in cotyledons and sprouts of germinating pea seeds (Pisum sativum cv Alaska or Green Arrow) increases rapidly during the first 2 to 3 days after imbibition and then declines to a lower activity. The reaction toward fructose 1,6-bisphosphate formation is activated greatly by fructose 2,6-bisphosphate (fru 2,6-P2); however, the sensitivity of the enzyme's activity to fru 2,6-P2 activation changes during germination. |
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