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5.1.3.17: heparosan-N-sulfate-glucuronate 5-epimerase

This is an abbreviated version!
For detailed information about heparosan-N-sulfate-glucuronate 5-epimerase, go to the full flat file.

Word Map on EC 5.1.3.17

Reaction

heparosan-N-sulfate D-glucuronate
=
heparosan-N-sulfate L-iduronate

Synonyms

C5 uronosyl epimerase, C5-epi, C5-epimerase, D-Glucuronyl C-5 epimerase, D-glucuronyl C5-epimerase, Epimerase, polyglucuronate, Glce, GlceA, GlceB, glucuronosyl C-5 epimerase, glucuronyl C5-epimerase, heparan sulfate C-5 epimerase, Heparan sulfate C5-epimerase, Heparosan N-sulfate D-glucuronosyl 5-epimerase, heparosan-glucuronate 5-epimerase, Heparosan-N-sulfate-D-glucuronosyl-5-epimerase, HG-5epi, HNSG-5epi, HS C5-epimerase, HS glucuronyl C5-epimerase, Hsepi, RED-C5-epimerase

ECTree

     5 Isomerases
         5.1 Racemases and epimerases
             5.1.3 Acting on carbohydrates and derivatives
                5.1.3.17 heparosan-N-sulfate-glucuronate 5-epimerase

Crystallization

Crystallization on EC 5.1.3.17 - heparosan-N-sulfate-glucuronate 5-epimerase

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CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
purified enzyme in apo-form and in complex with heparin hexasaccharide, both in a stable dimer conformation, hanging drop vapour diffusion method, mixing of 0.001 ml of 15-20 mg/ml protein in in 20 mM Tris, pH 8.0, 200 mM ammonium acetate, 1 mM dithiothreitol, and 1 mM EDTA, with 0.001 ml of 16% w/v PEG 3350, 0.1 M sodium citrate tribasic dihydrate, pH 5.6, and 2% v/v Tacsimate, pH 5.0 for the unlabeled enzyme and 16% w/v PEG 3350, 0.06 M citric acid, and 0.04 M Bis-Tris propane, pH 4.1, for the SeMet-labeled enzyme, a concentration of 5.0 mg/ml is used for the enzyme complex with heparin oligosaccharide at a molar ratio of 1:5, 20°C, 3 days, X-ray diffraction structure determination and analysis at 1.9-2.2 A resolution