The Enzyme Database

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EC 2.8.2.30     
Accepted name: [heparan sulfate]-glucosamine 3-sulfotransferase 3
Reaction: 3′-phosphoadenylyl sulfate + [heparan sulfate]-glucosamine = adenosine 3′,5′-bisphosphate + [heparan sulfate]-glucosamine 3-sulfate
Glossary: 3′-phosphoadenylyl sulfate = PAPS
heparan sulfate: for definition click here
Systematic name: 3′-phosphoadenylyl-sulfate:[heparan sulfate]-glucosamine 3-sulfotransferase
Comments: Two major substrates contain the tetrasaccharides: → undetermined 2-sulfo-uronic acid→ GlcN2S→ IdoA2S→ GlcN*→ and → undetermined 2-sulfo-uronic acid→ GlcN2S→ IdoA2S→ GlcN6S*→ (symbols as in 2-Carb-38) with modification of the N-unsubstituted glucosamine residue (shown with an asterisk) [1,4]. Modification of selected sequences containing N-sulfo-glucosamine residues cannot yet be excluded. The 3-O-sulfated heparan sulfate can be utilized by Herpes simplex virus type 1 as an entry receptor to infect the target cells [2]. There are two isozymes, known as 3-OST-3A and 3-OST-3B, which have identical catalytic domains but are encoded by different mammalian genes [3]. The specificity of this enzyme differs from that of the other [heparan sulfate]-glucosamine 3-sulfotransferases. It is inefficient at modifying precursors of the antithrombin binding site [in contrast to EC 2.8.2.23 ([heparan sulfate]-glucosamine 3-sulfotransferase 1)] and it does not modify glucosamine preceded by GlcA2S [unlike EC 2.8.2.29 ([heparan sulfate]-glucosamine 3-sulfotransferase 2)].
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB
References:
1.  Liu, J., Shriver, Z., Blaiklock, P., Yoshida, K., Sasisekharan, R. and Rosenberg, R.D. Heparan sulfate D-glucosaminyl 3-O-sulfotransferase 3A sulfates N-unsubstituted glucosamine. J. Biol. Chem. 274 (1999) 38155–38162. [PMID: 10608887]
2.  Shukla, D., Liu, J., Blaiklock, P., Shworak, N.W., Bai, X., Esko, J.D., Cohen, G.H., Eisenberg, R.J., Rosenberg, R.D. and Spear, P.G. A novel role for 3-O-sulfated heparan sulfate in Herpes simplex virus 1 entry. Cell 99 (1999) 13–22. [PMID: 10520990]
3.  Shworak, N.W., Liu, J., Petros, L.M., Copeland, N.G. , Jenkins N.A. and Rosenberg, R.D. Diversity of the extensive heparan sulfate D-glucosaminyl 3-O-sulfotransferase (3-OST) multigene family. J. Biol. Chem. 274 (1999) 5170–5184. [PMID: 9988767]
4.  Liu, J., Shworak, N.W., Sina, P., Schwartz, J.J., Zhang, L., Fritze, L.M.S. and Rosenberg, R.D. Expression of heparan sulfate D-glucosaminyl 3-O-sulfotransferase isoforms reveals novel substrate specificities. J. Biol. Chem. 274 (1999) 5185–5192. [PMID: 9988768]
[EC 2.8.2.30 created 2001]
 
 


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