Potassium Chloride → Udp-Glucose

HRID 1596732

Reaction equation

HRID 1596732 reaction equation
CN/C(/NCCSCC1[O:17][C:16](CN(C)C)=CC=1)=C\[N+]([O-])=O.Cl.C1N(CCS(O)(=O)=O)CC[O:25]C1.[OH2:35].[Mg+2].[Cl-].[Cl-].C1N=C(N)C2N=CN([C@@H:48]3[O:52][C@H:51]([CH2:53][O:54][P:55]([O:58][P:59]([O:62][CH2:63][C@H:64]4[O:68][C@@H:67]([N:69]5[CH:74]=[C:73]([C:75]([NH2:77])=[O:76])CC=[CH:70]5)[C@H:66]([OH:78])[C@@H:65]4[OH:79])([OH:61])=[O:60])([OH:57])=[O:56])[C@@H:50]([OH:80])[C@H:49]3[OH:81])C=2N=1.C(N(CC(O)=O)CC(O)=O)CN(CC(O)=O)CC(O)=O.[Cl-].[K+]>>[CH:73]1[C:75](=[O:76])[NH:77][C:70](=[O:35])[N:69]([C@@H:67]2[O:68][C@H:64]([CH2:63][O:62][P:59]([O:58][P:55]([O:54][C@H:53]3[O:52][C@H:48]([CH2:16][OH:17])[C@@H:49]([OH:81])[C@H:50]([OH:80])[C@H:51]3[OH:25])([OH:57])=[O:56])([OH:61])=[O:60])[C@@H:65]([OH:79])[C@H:66]2[OH:78])[CH:74]=1

Participants

7

Reactant 6

HCID 4873Potassium ChlorideHCID 6049Ethylenediaminetetraacetic AcidHCID 439153NadhHCID 3033332Ranitidine Hydrochloride2×HCID 5360315Magnesium ChlorideHCID 162184172-(N-Morpholino)ethanesulfonic acid hydrate

Product 1

HCID 8629Udp-Glucose

Procedure

N-acylsphingosine glucosyltransferase (EC 2.4.1.80) activity was measured in rat brain homogenates and mouse macrophage tissue cultured cell (WEHI-3B) homogenates using a method adapted as follows from published conventional procedures [Vunnam and Radin, Chem. & Phys. of Lipids 26, 265-278 (1980); Shukla and Radin, Arch. Biochem. Biophys. 283, 372-378 (1990)]: Dioleoylphosphatidylcholine and cerebroside liposomes containing 200 nmol ceramides Type IV (Sigma) were added to a reaction mixture (100 μl) composed of 40 mM 2-[N-morpholino]ethanesulfonic acid (MES) buffer, pH 6.5, 5 mM MnCl2, 2.5 mM MgCl2, 1 mM NADH and 8 μM UDP-[14C]-glucose (318 mCi/mmol, Amersham International, Amersham, U.K.). After incubation at 37° C. for 1-2 hr. the reaction was stopped by the addition of EDTA (25 mM) and KCl (50 mM). Radiolabelled glycolipids were extracted with 500 μl of chloroform:methanol (2:1 v/v) for 10 min. and the phases separated. The lower phase was washed twice with Folch theoretical upper phase and portions taken for scintillation counting. When imino sugars were tested for inhibitory activity, these were added at appropriate concentrations to homogenates and preincubated for 10 min. before sonication with ceramide containing liposomes. Control reactions were performed with liposomes containing no ceramide to measure the activity of transfer to endogenous acceptors.

Workup

  1. extractionRadiolabelled glycolipids were extracted with 500 μl of chloroform:methanol (2:1 v/v) for 10 min.
  2. customthe phases separated
  3. washThe lower phase was washed twice with Folch theoretical upper phase and portions
  4. additionthese were added at appropriate concentrations to homogenates
  5. custompreincubated for 10 min. before sonication with ceramide containing liposomes
  6. additioncontaining no ceramide

Sources & evidence

ORD record
ord-690e82639d584caebcbc0e05d8bbaa5f
Source dataset
uspto-grants-2001_09
Patent number
US06291657B1

Linked notes

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