Structural highlights
3f5f is a 1 chain structure with sequence from Escherichia coli k-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , |
| Gene: | b4034, HS2ST, HS2ST1, JW3994, malE, HS2ST, HS2ST1, malE (Escherichia coli K-12) |
| Resources: | FirstGlance, OCA, RCSB, PDBsum |
Function
[MALE_ECOLI] Involved in the high-affinity maltose membrane transport system MalEFGK. Initial receptor for the active transport of and chemotaxis toward maltooligosaccharides.
Publication Abstract from PubMed
Heparan sulfate (HS) is a polysaccharide involved in essential physiological functions from regulating cell growth to blood coagulation. HS biosynthesis involves multiple specialized sulfotransferases such as 2-O-sulfotransferase (2OST) that transfers the sulfo group to the 2-OH position of iduronic acid (IdoA) or glucuronic acid (GlcA) within HS. Here, we report the homotrimeric crystal structure of 2OST from chicken, in complex with 3'-phosphoadenosine 5'-phosphate. Structural based mutational analysis has identified amino acid residues that are responsible for substrate specificity. The mutant R189A only transferred sulfates to GlcA moieties within the polysaccharide whereas mutants Y94A and H106A preferentially transferred sulfates to IdoA units. Our results demonstrate the feasibility for manipulating the substrate specificity of 2OST to synthesize HS with unique sulfation patterns. This work will aid the development of an enzymatic approach to synthesize heparin-based therapeutics.
Redirecting the substrate specificity of heparan sulfate 2-O-sulfotransferase by structurally guided mutagenesis.,Bethea HN, Xu D, Liu J, Pedersen LC Proc Natl Acad Sci U S A. 2008 Dec 2;105(48):18724-9. Epub 2008 Nov 20. PMID:19022906[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Bethea HN, Xu D, Liu J, Pedersen LC. Redirecting the substrate specificity of heparan sulfate 2-O-sulfotransferase by structurally guided mutagenesis. Proc Natl Acad Sci U S A. 2008 Dec 2;105(48):18724-9. Epub 2008 Nov 20. PMID:19022906
