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EC 2.8.2.29 Details
EC number
2.8.2.29
Accepted name
[heparan sulfate]-glucosamine 3-sulfotransferase 2
Reaction
3′-phosphoadenylyl sulfate + [heparan sulfate]-glucosamine = adenosine 3′,5′-bisphosphate + [heparan sulfate]-glucosamine 3-sulfate
Other name(s)
glucosaminyl 3-O-sulfotransferase, heparan sulfate D-glucosaminyl 3-O-sulfotransferase, isoform/isozyme 2 (3-OST-2, HS3ST2), 3′-phosphoadenylyl-sulfate:[heparan sulfate]-glucosamine 3-sulfotransferase
Systematic name
3′-phosphoadenylyl-sulfate:[heparan sulfate]-glucosamine 3-sulfonotransferase
Comment
This enzyme sulfates the residues marked with an asterisk in sequences containing at least → IdoA2S→ GlcN*→ or → GlcA2S→ GlcN*→ (symbols as in 2-Carb-38). Preference for GlcN2S vs. unmodified GlcN has not yet been established. Additional structural features are presumably required for substrate recognition, since the 3-O-sulfated residue is of low abundance, whereas the above IdoA-containing sequence is quite abundant. This enzyme differs from the other [heparan sulfate]-glucosamine 3-sulfotransferases by modifying selected glucosamine residues preceded by GlcA2S; EC 2.8.2.23 ([heparan sulfate]-glucosamine 3-sulfotransferase 1) prefers GlcA or IdoA, whereas EC 2.8.2.30 ([heparan sulfate]-glucosamine 3-sulfotransferase 3) prefers IdoA2S.
History
created 2001
EC Tree
2.8.2.12 created 1972, deleted 2001
2.8.3.4 created 1961, deleted 1964