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ECM proteoglycans

Stable Identifier
R-HSA-3000178
Type
Pathway
Species
Homo sapiens
Locations in the PathwayBrowser
Summation

Proteoglycans are major components of the extracellular matrix. In cartilage the matrix constitutes more than 90% of tissue dry weight. Proteoglycans are proteins substituted with glycosaminoglycans (GAGs), linear polysaccharides consisting of a repeating disaccharide, generally of an acetylated amino sugar alternating
with a uronic acid. Most proteoglycans are located in the extracellular
space. Proteoglycans are highly diverse, both in terms of the core proteins and the subtypes of GAG chains, namely chondroitin sulfate (CS), keratan sulfate (KS), dermatan sulfate (DS) and heparan sulfate (HS). Hyaluronan is a non-sulfated GAG whose molecular weight runs into millions of Dalton; in articular cartilage, a single hyaluronan molecule can hold upto 100 aggrecan molecules and these aggregates are stabilized by a link protein.

Literature References
PubMed ID Title Journal Year
  Proteoglycans and Sulfated Glycosaminoglycans   2009
  Cell Biology of Extracellular Matrix   1991
21307119 Extracellular matrix and cell signalling: the dynamic cooperation of integrin, proteoglycan and growth factor receptor J. Endocrinol. 2011
  Cell Biology of Extracellular Matrix   1991
Participants
Participant Of
Orthologous Events