Human Proteoglycan 4 ELISA Kit | PRG4 elisa kit
Human Proteoglycan 4 ELISA Kit
Typical Testing Data/Standard Curve (for reference only)
Principle of the Assay: The microtiter plate provided in this kit has been pre-coated with an antibody specific to target antigen. Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody preparation specific for target antigen and then avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. Then a TMB substrate solution is added to each well. Only those wells that contain target antigen, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm +/- 2 nm. The concentration of target antigen in the samples is then determined by comparing the O.D. of the samples to the standard curve.
NCBI and Uniprot Product Information
NCBI Description
The protein encoded by this gene is a large proteoglycan that is synthesized by chondrocytes located at the surface of articular cartilage and by some synovial lining cells. This protein contains both chondroitin sulfate and keratan sulfate glycosaminoglycans. It functions as a boundary lubricant at the cartilage surface and contributes to the elastic absorption and energy dissipation of synovial fluid. Mutations in this gene result in camptodactyly-arthropathy-coxa vara-pericarditis syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]
Uniprot Description
PRG4: Plays a role in boundary lubrication within articulating joints. Prevents protein deposition onto cartilage from synovial fluid by controlling adhesion-dependent synovial growth and inhibiting the adhesion of synovial cells to the cartilage surface. Defects in PRG4 are the cause of camptodactyly- arthropathy-coxa vara-pericarditis syndrome (CACP); also known as Jacobs syndrome. CACP is an autosomal recessive disorder. Individuals with CACP have normal appearing joints at birth but with advancing age develop joint failure associated with noninflammatory synoviocyte hyperplasia and subintimal fibrosis of the synovial capsule. 6 isoforms of the human protein are produced by alternative splicing.
Protein type: Secreted, signal peptide; Secreted
Chromosomal Location of Human Ortholog: 1q25-q31
Cellular Component: extracellular space
Molecular Function: polysaccharide binding; scavenger receptor activity
Biological Process: cell proliferation; immune response; negative regulation of interleukin-6 biosynthetic process; receptor-mediated endocytosis; regulation of cell proliferation
Disease: Camptodactyly-arthropathy-coxa Vara-pericarditis Syndrome
