GC
Function
Involved in vitamin D transport and storage, scavenging of extracellular G-actin, enhancement of the chemotactic activity of C5 alpha for neutrophils in inflammation and macrophage activation.
Post-translational modifications
Allele GC*1S is O-glycosylated at Thr-436 (PubMed:20079467). The trisaccharide sugar moiety can be modified by the successive removal of neuraminic acid and galactose leaving an O-mceeN-acetyl-galactosamine. This conversion is thought to produce a macrophage-activating factor (Gc-MAF). Only a minor proportion of plasma GC is O-glycosylated (PubMed:17360250). The potential N-glycosylation site predicted at Asn-288 is thought to be nonglycosylated.
Sequence Similarities
Belongs to the ALB/AFP/VDB family.
Tissue Specificity
Expressed in the liver. Found in plasma, ascites, cerebrospinal fluid and urine.
Cellular localization
- Secreted
Alternative names
Vitamin D-binding protein, DBP, VDB, Gc protein-derived macrophage activating factor, Gc-globulin, Group-specific component, Vitamin D-binding protein-macrophage activating factor, Gc-MAF, GcMAF, Gc, DBP-maf, GC