Pathway of dephosphorylation of myo-inositol hexakisphosphate by phytases of legume seeds

Using a combination of high-performance ion chromatography analysis and kinetic studies, the pathway of dephosphorylation of myo-inositol hexakisphosphate by the phytases purified from faba bean and lupine seeds, respectively, was established. The data demonstrate that the legume seed phytases under investigation dephosphorylate myo-inositol hexakisphosphate in a stereospecific way. The phytase from faba bean seeds and the phytase LP2 from lupine seeds degrade phytate by sequential removal of phosphate groups via D-Ins(1,2,3,5,6)P5, D-Ins(1,2,5,6)P4, D-Ins(1,2,6)P3, and D-Ins(1,2)P2 to finally Ins(2)P, whereas the phytases LP11 and LP12 from lupine seeds generate the final degradation product Ins(2)P via D-Ins(1,2,4,5,6)P5, D-Ins(1,2,5,6)P4, D-Ins(1,2,6)P3, and D-Ins(1,2)P2.

Bibliographic Details

Main Authors:	Greiner, R., Larsson Alminger, M., Carlsson, N. G., Muzquiz, M., Burbano, C., Cuadrado Hoyos, María Carmen, Pedrosa, M. M., Goyoaga, C.
Format:	artículo biblioteca
Language:	English
Published:	American Chemical Society 2002
Subjects:	Faba bean, Legume phytase, Lupine, Myo-inositol phosphate isomers, Phytate degradation,
Online Access:	http://hdl.handle.net/20.500.12792/5172 http://hdl.handle.net/10261/291844
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