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Mini Review

Evolution of glycosaminoglycans

Comparative biochemical study

, &
Pages 150-158 | Received 20 Dec 2010, Accepted 20 Dec 2010, Published online: 01 Mar 2011

Figures & data

Figure 1 The backbone structure of GAGs. CS or DS is composed of alternating disaccharide units of GlcA or IdoA and GalNAc, respectively. R1, R2, R3, R4 = −H or −SO3H. Modification with β-D-glucose at the R2 position has been found in squid CS. The presence of the α-L-fucose branch at the R4 position has been reported in the CS preparations from sea cucumber and king crab. HS is composed of alternating disaccharide units of GlcA or IdoA and GlcN. R1 = −COCH3 or −SO3H; R2, R3, R4, R5 = −H or −SO3H. Recently, sulfation at the R5 position was discovered in a bivalve HS.Citation71 HA is a linear polymer composed of GlcA and GlcNAc.

Figure 1 The backbone structure of GAGs. CS or DS is composed of alternating disaccharide units of GlcA or IdoA and GalNAc, respectively. R1, R2, R3, R4 = −H or −SO3H. Modification with β-D-glucose at the R2 position has been found in squid CS. The presence of the α-L-fucose branch at the R4 position has been reported in the CS preparations from sea cucumber and king crab. HS is composed of alternating disaccharide units of GlcA or IdoA and GlcN. R1 = −COCH3 or −SO3H; R2, R3, R4, R5 = −H or −SO3H. Recently, sulfation at the R5 position was discovered in a bivalve HS.Citation71 HA is a linear polymer composed of GlcA and GlcNAc.

Figure 2 Distribution of GAGs in the animal kingdom.

Figure 2 Distribution of GAGs in the animal kingdom.

Table 1 Representative disaccharide composition of CD/DS from various species

Table 2 Representative disaccharide composition of HS from various species