An Infrared Study of the Thermal and pH Stabilities of the GPI-Alkaline Phosphatase from Bovine Intestine
| Autor: | Bernard Roux, Françoise Besson, Muriel Bortolato |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Glycosylphosphatidylinositols
Protein Conformation Placenta Biophysics medicine.disease_cause Biochemistry Protein Structure Secondary chemistry.chemical_compound Protein structure Enzyme Stability Spectroscopy Fourier Transform Infrared Escherichia coli medicine Animals Moiety Intestinal Mucosa Fourier transform infrared spectroscopy Molecular Biology chemistry.chemical_classification biology Chemistry Temperature Cell Biology Hydrogen-Ion Concentration Alkaline Phosphatase Phosphate Enzyme assay Enzyme Activation Enzyme biology.protein Alkaline phosphatase Cattle |
| Zdroj: | Biochemical and Biophysical Research Communications. 292:874-879 |
| ISSN: | 0006-291X |
| Popis: | Alkaline phosphatase (EC 3.1.3.1) from bovine intestine mucosa (BIAP) is a homodimeric metalloenzyme, which hydrolyses nonspecifically phosphate monoesters at alkaline pH with release of inorganic phosphate and alcohol. BIAP is either soluble (sBIAP) or membrane-anchored by a glycosylphosphatidylinositol moiety (GPI-BIAP). This anchor might have some contribution in the stabilization of the GPI-linked protein structure. Our purpose was to study the role of the anchor by using two parameters, the enzymatic activity and the protein conformation, which was analyzed by using FTIR spectroscopy. We determined that the two forms of BIAP show some similarities with the previously described structure of alkaline phosphatase isolated from Escherichia coli and human placenta. Meanwhile GPI-BIAP and sBIAP exhibit similar specific activities, the presence of the anchor increases the thermal and pH stabilities of the enzyme activity and conformation. |
| Databáze: | OpenAIRE |
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