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Camptodactyly-arthropathy-coxa vara-pericarditis syndrome : ウィキペディア英語版 | Camptodactyly-arthropathy-coxa vara-pericarditis syndrome Camptodactyly-arthropathy-coxa vara-pericarditis syndrome is a rare genetic condition due to a mutation in the gene proteoglycan 4 (PRG4) - a chondroitin sulfate proteoglycan that acts as a lubricant for the cartilage surfaces. This gene is also known as lubricin. This condition is inherited as an autosomal recessive. ==Genetics==
The gene responsible for this condition is located on the long arm of chromosome 1 (1q). The encoded protein is a glycoprotein of ~345 kDa specifically synthesized by chondrocytes located at the surface of articular cartilage, and also by some synovial lining cells. The cDNA encodes a protein of 1,404 amino acids (human A isoform) with a somatomedin B homology domain, heparin-binding domains, multiple mucin-like repeats, a hemopexin domain, and an aggregation domain. There are 3 consensus sequences for N-glycosylation and 1 chondroitin sulfate substitution site.
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