6-[[[5-(2,4-Dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-hydroxyphosphoryl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid → N-Acetyl-D-Galactosamine

HRID 2239213

反応式

HRID 2239213 の反応式
[CH3:1][C:2]([NH:4][C@H:5]1[C@@H:10]([O:11]P(OP(OC[C@H]2O[C@@H](N3C(=O)NC(=O)C=C3)[C@H](O)[C@@H]2O)(O)=O)(O)=O)[O:9][C@H:8]([CH2:36][OH:37])[C@H:7]([OH:38])[C@@H:6]1[OH:39])=[O:3].C1C(=O)NC(=O)N(C2OC(COP(OP(OC3OC(C(O)=O)C(O)C(O)C3O)(O)=O)(O)=O)C(O)C2O)C=1.C(O)C(N)(CO)CO.Cl.[Na+].[Cl-].CC(N[C@H]1[C@H](O)O[C@H](OS(O)(=O)=O)[C@H](O)[C@@H]1O[C@@H]1O[C@H](C(O)=O)[C@@H](O)[C@H](O)[C@H]1O)=O>O.C(O)C.C(O)CO>[OH:11][CH:10]1[O:9][C@H:8]([CH2:36][OH:37])[C@H:7]([OH:38])[C@H:6]([OH:39])[C@H:5]1[NH:4][C:2]([CH3:1])=[O:3]

参加物

9

反応物 5

HCID 3906-[[[5-(2,4-Dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-hydroxyphosphoryl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acidHCID 5234Sodium ChlorideHCID 23700UDP-N-acetylgalactosamineHCID 24766Chondroitin SulfateHCID 93573Tromethamine hydrochloride

生成物 1

HCID 35717N-Acetyl-D-Galactosamine

試薬・触媒・溶媒 3

HCID 174Ethylene Glycol溶媒HCID 702Ethanol溶媒HCID 962Water溶媒

実験手順

The enzyme of the present invention (2 μg), hexasaccharide of shark cartilage chondroitin sulfate C, purified by degrading with testicular hyaluronidase, as the acceptor (70 pmol) and UDP-GalNAc (3 nmol), UDP-GlcUA (3 nmol) and UDP-[3H]GalNAc (0.1 nmol, 0.1 μCi) as the donors were added to 50 mM Tris-HCl (pH 7.2) containing 20 mM MnCl2, 0.1 M (NH4)2SO4 and 1 M ethylene glycol, and the total volume was adjusted to 50 μl, and then the reaction was carried out at 30° C. for 30 minutes and the enzyme was heat-inactivated. To the reaction solution, 3 volumes of 95% ethanol containing 1.3% potassium acetate was added, and the sample was centrifuged at 10,000×g for 20 minutes. The precipitate was dissolved in 50 μl of distilled water and applied to a Superdex Peptide column (300×φ10 mm: Amersham Biosciences, chromatography conditions; buffer: 0.2 M NaCl, flow rate: 0.5 ml/min), and the eluate was fractionated at 0.5 ml and the radioactivity (count of [3H]) of each fraction was measured using a scintillation counter. Chondroitin synthesizing activity was determined by calculating the amount of radioactivity incorporated into fractions of higher molecular weight than the acceptor substrate. The results are shown in FIG. 3. In FIG. 3, the closed squares indicate radioactivity when hexasaccharide of chondroitin sulfate C was used as the acceptor, open triangles indicate radioactivity when the enzyme reaction product was treated with chondroitinase ABC and closed circles indicates control (wherein heat-inactivated enzyme of the present invention was used).

後処理

  1. customThe enzyme of the present invention (2 μg), hexasaccharide of shark cartilage chondroitin sulfate C, purified
  2. waitg for 20 minutes
  3. additionwas treated with chondroitinase ABC
  4. customclosed circles

出典と根拠

ORDレコード
ord-6d238ac55ce948fe8dd4a016bce0e55a
出典データセット
uspto-grants-2010_05
特許番号
US07723092B2

関連ノート

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