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Updated: Dec 24, 2025
09:33
In Vitro Assay to Measure Phosphatidylethanolamine Methyltransferase Activity
Published on: January 5, 2016
10.1K
Structural characterization of human O-phosphoethanolamine phospho-lyase
Chiara Vettraino1, Alessio Peracchi2, Stefano Donini1
1Center for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, Via Pascoli 70/3, 20133 Milano, Italy.
Summary
Human O-phosphoethanolamine phospho-lyase (hEtnppl) breaks down O-phosphoethanolamine (PEA). The crystal structure reveals its fold and active site, aiding in its complete characterization.
Area of Science:
- Biochemistry
- Structural Biology
- Enzymology
Background:
- Human O-phosphoethanolamine phospho-lyase (hEtnppl) is a pyridoxal 5'-phosphate-dependent enzyme.
- hEtnppl plays a physiological role in phospholipid metabolism via the CDP-ethanolamine (Kennedy) pathway.
Purpose of the Study:
- To determine the crystal structure of human O-phosphoethanolamine phospho-lyase (hEtnppl).
- To characterize the structure of hEtnppl in complex with pyridoxamine 5'-phosphate.
Main Methods:
- Crystal structure determination using molecular replacement.
- Resolution of 2.05 Å.
Main Results:
- The crystal structure of hEtnppl in complex with pyridoxamine 5'-phosphate was determined.
- Structural analysis showed shared general fold and active-site residue arrangement with Arthrobacter aurescens TC1 A1RDF1.
- The structure provides insights into the enzyme's active site.
Conclusions:
- The determined crystal structure offers novel information for the complete characterization of human O-phosphoethanolamine phospho-lyase.
- Structural data can guide further studies on hEtnppl function and inhibition.
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