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NHC-diphosphate-triammonium

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Category Hepatitis C Virus (HCV)
Description NHC-triphosphate triammonium is an active phosphorylated intracellular metabolite of β-d-N4-Hydroxycytidine (NHC) (HY-125033) as a triphosphate form. NHC-triphosphate triammonium is a weak alternative substrate for the viral polymerase and can be incorporated into HCV replicon RNA.
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Product Information

Molecular Weight 470.27
Molecular Formula C9H24N6O12P2
Purity ≥98% (HPLC)
Solubility In vitro:
10 mM in DMSO
Appearance White to off-white (Solid)
Storage -20°C, protect from light, stored under nitrogen
* In solvent :
-80°C 6 months;
-20°C 1 month (protect from light, stored under nitrogen)
In Vitro In an intracellular metabolism assay, HCV replicon cells are treated with 10 μM 3H-labeled NHC, and intracellular nucleotide levels are determined after 1, 2 and 8 hours incubations. NHC is rapidly convered into the mono-, di-, and triphosphate forms, and NHC-TP reaches up to 71.12 pM after 8 hours.
NHC-triphosphate triammonium (NHC-TP) (5-40 μM) absence leads to full-length polymerization products, it can be a weak alternative substrate. In addition, incorporation of NHC-TP instead of CTP increases the molecular weight of the polymerization product by 16 (one extra oxygen) for each event and an obvious electrophoretic shift is observed in cell-free HCV NS5B polymerization reactions.
Huh-7 cells are incubated with (10-50 μM; 4 h) NHC or a McGuigan phosphoramidate prodrug of NHC. Intracellular levels of the parental compounds and phosphorylated metabolites are measured using LC-MS/MS. Small amounts of NHC- monophosphate (MP) and NHC-diphosphate (DP) can be observed, while NHC-triphosphate triammonium (HY-135867) remains the most abundant metabolite.
NHC-triphosphate triammonium (NHC-TP) metabolite may directly target the viral polymerase and behave as a nonobligate chain terminator. It plays a prominent role in inhibiting early negative-strand RNA synthesis, either through chain termination or mutagenesis, which may in turn interfere with correct replicase complex formation.
Target Endogenous Metabolite; Enterovirus; HCV; Topoisomerase; SARS-CoV

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