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"Heparin/biosynthesis/chemistry"
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Heparan sulfate C5-epimerase is essential for heparin biosynthesis in mast cells
by
Li, Jin-Ping
,
Rodewald, Hans-Reimer
,
Lindahl, Ulf
in
Animals
,
Biochemical Engineering
,
Biochemistry
2006
Biosynthesis of heparin, a mast cell–derived glycosaminoglycan with widespread importance in medicine, has not been fully elucidated. In biosynthesis of heparan sulfate (HS), a structurally related polysaccharide, HS glucuronyl C5-epimerase (Hsepi) converts
D
-glucuronic acid (GlcA) to
L
-iduronic acid (IdoA) residues. We have generated
Hsepi
-null mouse mutant mast cells, and we show that the same enzyme catalyzes the generation of IdoA in heparin and that 'heparin' lacking IdoA shows a distorted
O
-sulfation pattern.
Journal Article