| Post Translational Modifications | Ubiquitinated by TRIM26.leading to proteasomal degradation. |
| Function | Heterodimer with SLC3A2, that functions as an antiporter by mediating the exchange of extracellular anionic L-cystine and intracellular L-glutamate across the cellular plasma membrane. Provides L-cystine for the maintenance of the redox balance between extracellular L-cystine and L-cysteine and for the maintenance of the intracellular levels of glutathione that is essential for cells protection from oxidative stress. The transport is sodium-independent, electroneutral with a stoichiometry of 1:1, and is drove by the high intracellular concentration of L-glutamate and the intracellular reduction of L-cystine. In addition, mediates the import of L-kynurenine leading to anti-ferroptotic signaling propagation required to maintain L-cystine and glutathione homeostasis. Moreover, mediates N-acetyl-L-cysteine uptake into the placenta leading to subsequently down-regulation of pathways associated with oxidative stress, inflammation and apoptosis. In vitro can also transport L-aspartate. May participate in astrocyte and meningeal cell proliferation during development and can provide neuroprotection by promoting glutathione synthesis and delivery from non-neuronal cells such as astrocytes and meningeal cells to immature neurons. Controls the production of pheomelanin pigment directly. |
| Protein Name | Cystine/Glutamate TransporterAmino Acid Transport System Xc-Calcium Channel Blocker Resistance Protein Ccbr1Solute Carrier Family 7 Member 11Xct |
| Database Links | Reactome: R-HSA-210991Reactome: R-HSA-352230Reactome: R-HSA-9818027 |
| Cellular Localisation | Cell MembraneMulti-Pass Membrane ProteinCell ProjectionMicrovillus MembraneLocalized To The Microvillous Membrane Of The Placental Syncytiotrophoblast |
| Alternative Protein Names | Cystine/Glutamate Transporter proteinAmino Acid Transport System Xc- proteinCalcium Channel Blocker Resistance Protein Ccbr1 proteinSolute Carrier Family 7 Member 11 proteinXct proteinSLC7A11 protein |
Information sourced from Uniprot.org
