Receptor for the C-X-C chemokine CXCL12/SDF-1 that transduces a signal by increasing intracellular calcium ion levels and enhancing MAPK1/MAPK3 activation. Acts as a receptor for extracellular ubiquitin; leading to enhanced intracellular calcium ions and reduced cellular cAMP levels. Involved in hematopoiesis and in cardiac ventricular septum formation. Also plays an essential role in vascularization of the gastrointestinal tract, probably by regulating vascular branching and/or remodeling processes in endothelial cells. Involved in cerebellar development. In the CNS, could mediate hippocampal-neuron survival.
Specificity
Natural and recombinant Dog C-X-C chemokine receptor type 4
Subcellular Location
Cell membrane Multi-pass membrane protein In unstimulated cells, diffuse pattern on plasma membrane. On agonist stimulation, colocalizes with ITCH at the plasma membrane where it becomes ubiquitinated.
Monomer (By similarity). Can form dimers (By similarity). Interacts with CD164. Interacts with ARRB2; the interaction is dependent on the C-terminal phosphorylation of CXCR4 and allows activation of MAPK1 and MAPK3. Interacts with ARRC; the interaction is dependent on the C-terminal phosphorylation of CXCR4 and modulates calcium mobilization. Interacts (via the cytoplasmic C-terminal) with ITCH (via the WW domains I and II); the interaction, enhanced by CXCL12, ubiquitinates CXCR4 and leads to its degradation. Interacts with extracellular ubiquitin; the interaction enhances intracellular calcium ions and reduces cellular cAMP levels.
"Evaluation of the canine CXCR4 and CXCL12 genes as a candidate for chronic neutropenia with myelokathexis in a border collie dog." Tsuchida S., Kagi A., Takahashi T. Submitted (2005-08) to the EMBL/GenBank/DDBJ databases
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Reviews of ELISA Kit for Dog C-X-C chemokine receptor type 4