| Post Translational Modifications | A soluble form (sCD163) is produced by proteolytic shedding which can be induced by lipopolysaccharide, phorbol ester and Fc region of immunoglobulin gamma. This cleavage is dependent on protein kinase C and tyrosine kinases and can be blocked by protease inhibitors. The shedding is inhibited by the tissue inhibitor of metalloproteinase TIMP3, and thus probably induced by membrane-bound metalloproteinases ADAMs. Phosphorylated. |
| Function | Acute phase-regulated receptor involved in clearance and endocytosis of hemoglobin/haptoglobin complexes by macrophages and may thereby protect tissues from free hemoglobin-mediated oxidative damage. May play a role in the uptake and recycling of iron, via endocytosis of hemoglobin/haptoglobin and subsequent breakdown of heme. Binds hemoglobin/haptoglobin complexes in a calcium-dependent and pH-dependent manner. Exhibits a higher affinity for complexes of hemoglobin and multimeric haptoglobin of HP*1F phenotype than for complexes of hemoglobin and dimeric haptoglobin of HP*1S phenotype. Induces a cascade of intracellular signals that involves tyrosine kinase-dependent calcium mobilization, inositol triphosphate production and secretion of IL6 and CSF1. Isoform 3 exhibits the higher capacity for ligand endocytosis and the more pronounced surface expression when expressed in cells. After shedding, the soluble form (sCD163) may play an anti-inflammatory role, and may be a valuable diagnostic parameter for monitoring macrophage activation in inflammatory conditions. |
| Protein Name | Scavenger Receptor Cysteine-Rich Type 1 Protein M130Hemoglobin Scavenger ReceptorCd Antigen Cd163 Cleaved Into - Soluble Cd163Scd163 |
| Database Links | Reactome: R-HSA-2168880Reactome: R-HSA-9662834 |
| Cellular Localisation | Soluble Cd163: SecretedCell MembraneSingle-Pass Type I Membrane ProteinIsoform 1 And Isoform 2 Show A Lower Surface Expression When Expressed In Cells |
| Alternative Protein Names | Scavenger Receptor Cysteine-Rich Type 1 Protein M130 proteinHemoglobin Scavenger Receptor proteinCd Antigen Cd163 Cleaved Into - Soluble Cd163 proteinScd163 proteinCD163 proteinM130 protein |
Information sourced from Uniprot.org
