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HQNO

Cat. No. M20706
HQNO Structure
Synonym:

2-heptyl-4-hydroxyquinoline-N-oxide

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Biological Activity

HQNO is a natural quinolone secreted by P. aeruginosa. HQNO is a potent inhibitor of the electron transport chain with Kd of 64 nM for the ubiquinol-ferricytochrome c oxidoreductase segment (Complex III) of the respiratory chain. HQNO is also an inhibitor of bacterial and mitochondrialType II NADH : quinone oxidoreductase (NDH-2) with IC50 of 7.3 μM in the presence of 50μM menadione.

Chemical Information
Molecular Weight 259.34
Formula C16H21NO2
CAS Number 341-88-8
Solubility (25°C) DMSO 9 mg/mL
Storage Powder          -20°C   3 years ;  4°C   2 years
In solvent       -80°C   6 months ;  -20°C   1 month
Conversion of different model animals based on BSA (PMID: 27057123)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.

References

[1] Jiao Mo, et al. Int J Parasitol Drugs Drug Resist. Effect of the pseudomonas metabolites HQNO on the Toxoplasma gondii RH strain in vitro and in vivo

[2] Enrique J Montagut, et al. Microbiol Spectr. An Immunochemical Approach to Detect the Quorum Sensing-Regulated Virulence Factor 2-Heptyl-4-Quinoline N-Oxide (HQNO) Produced by Pseudomonas aeruginosa Clinical Isolates

[3] Jessica Petri, et al. Biochim Biophys Acta Bioenerg. Structure of the NDH-2 - HQNO inhibited complex provides molecular insight into quinone-binding site inhibitors

[4] Jiwon Kang, et al. J Biochem Mol Biol. HQNO-sensitive NADH:quinone oxidoreductase of Bacillus cereus KCTC 3674

[5] G Van Ark, et al. Biochim Biophys Acta. Binding of HQNO to beef-heart sub-mitochondrial particles

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Keywords: HQNO, 2-heptyl-4-hydroxyquinoline-N-oxide supplier, inhibitors, activators


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