L-Tetraguluronic acid

L-Tetraguluronic acid is a straight-chain polysaccharide copolymer consisting of four repeating units involved in the formation of the alginate.L-Tetraguluronic acid interacts with Glu543 in the non-catalytic domain and can help AlyRm1 to bind the substrate more efficiently and to improve the catalytic efficiency.

O([C@@H]1[C@H](C(O)=O)O[C@@H](O[C@@H]2[C@H](C(O)=O)O[C@@H](O)[C@@H](O)[C@H]2O)[C@@H](O)[C@H]1O)[C@@H]3O[C@@H](C(O)=O)[C@@H](O[C@@H]4O[C@@H](C(O)=O)[C@@H](O)[C@H](O)[C@@H]4O)[C@H](O)[C@@H]3O