Intestinal alkaline phosphatase can transphosphorylate thiamin to thiamin monophosphate during intestinal transport in the rat.

Abstract

Intestinal alkaline phosphatase (IAP) purified from calf intestine and IAP present in the brush border membrane of rat small intestine effectively transphosphorylated thiamin (T) to thiamin monophosphate (TMP) using Na2-beta-glycerophosphate or Na2-creatine phosphate as phosphate donors at pH 8.5. TMP production in the brush border membrane was very small and corresponded to 0.001-0.01 percent of the total inorganic phosphate simultaneously released by the enzyme activity. This reaction, however, could account for TMP formation independently from that much more important due to the hydrolysis of thiamin pyrophosphate during T intestinal absorption.

Cite this paper

@article{Rindi1995IntestinalAP, title={Intestinal alkaline phosphatase can transphosphorylate thiamin to thiamin monophosphate during intestinal transport in the rat.}, author={Guido Rindi and Vittorio Ricci and Giulia Gastaldi and Cesare Patrini}, journal={Archives of physiology and biochemistry}, year={1995}, volume={103 1}, pages={33-8} }