| Post Translational Modifications | When hydroxylated at Pro-137, ubiquitinated via 'Lys-48'-linkage, leading to proteasomal degradation. In endothelial cells, ORMDL3 proteasomal degradation is controlled by the sphingosine 1-phosphate receptor signaling pathway. |
| Function | Plays an essential role in the homeostatic regulation of sphingolipid de novo biosynthesis by modulating the activity of the serine palmitoyltransferase (SPT) in response to ceramide levels. When complexed to SPT, the binding of ceramides to its N-terminus stabilizes a conformation that block SPT substrate entry, hence preventing SPT catalytic activity. Through this mechanism, maintains ceramide levels at sufficient concentrations for the production of complex sphingolipids, but which prevents the accumulation of ceramides to levels that trigger apoptosis. |
| Protein Name | Orm1-Like Protein 3 |
| Database Links | Reactome: R-HSA-1660661Reactome: R-HSA-6798695 |
| Cellular Localisation | Endoplasmic Reticulum MembraneMulti-Pass Membrane Protein |
| Alternative Antibody Names | Anti-Orm1-Like Protein 3 antibodyAnti-ORMDL3 antibody |
Information sourced from Uniprot.org
