Energetics of alkaline phosphatase (monoesterase) activity in Antarctic and tropical isolates of a cyanobacterium, Anabaena

Abstract

The influence of temperature (5-40°C) on the alkaline phosphatase activity (monoesterase) of Antarctic and tropical isolates of a diazotrophic cyanobacterium, Anabaena, was studied. Comparison of results revealed a lower endergonic reaction of alkaline phosphatase activity in the Antarctic isolate which was evident from a 43.02% lower energy of activation (Ea) of this isolate with respect to its tropical counterpart. Results obtained should provide a basis for future comparative studies on the energetics of alkaline phosphatase activity in cyanobacteria.