Table 1

Proteoglycans (PGs) and proteins of the cartilage extracellular matrix

Proteoglycans
Proteins

Aggregating
Structural
     Aggrecan
     COMP (Thrombospondin-5)
     Versican
     Thrombospondin-1 and -3
     Link protein
     CMP (Matrilin-1)
Leucine-rich repeat
     Matrilin-3
     Biglycan (DS-PGI)
     CILP
     Decorin (DS-PGII)
     C-type lectin
     Epiphycan (DS-PGIII)
     Fibronectin
     Fibromodulin
     PRELP
     Lumican
     Chondroadherin
Other
     Tenascin-C
     Perlecan
     Fibrillin
     SZP/Lubricin
     Elastin

Regulatory

     gp-39/YKL-40

     Matrix gla protein/ MGP

     Pleiotrophin

     Chondromodulin-I/SCGP

     Chondromodulin-II

     CD-RAP

     Growth factors

Other

     Chondrocalcin

     PARP

     Lysozyme

     Phospholipase A2

     Proteinases and inhibitors

CD-RAP = cartilage-derived retinoic acid responsive protein; CILP = cartilage intermediate layer protein; CMP = cartilage matrix protein; COMP = cartilage oligomeric matrix protein; DS-PG(I, II, III) = dermatan sulfate proteoglycan (I, II, III); gla = gamma-carboxyglutamic acid; gp = glycoprotein; PARP = proline- and arginine-rich protein; PRELP = proline- and arginine-rich end leucine-rich repeat protein; SZP = superficial zone protein.

Roughley Arthritis Res 2001 3:342   doi:10.1186/ar326