HQNO

Catalog No.S8970 Batch:S897001

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Technical Data

Formula

C16H21NO2
Molecular Weight 259.34 CAS No. 341-88-8
Solubility (25°C)* In vitro Ethanol 16 mg/mL (61.69 mM)
DMSO 9 mg/mL (34.7 mM)
Water Insoluble
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

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Biological Activity

Description HQNO (2-heptyl-4-hydroxyquinoline-N-oxide) 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.
Targets
Complex III [1]
(Cell-free assay)		 NDH-2 [2]
(Cell-free assay)
64 nM(Kd) 7.3 μM
In vitro

The aerobic respiratory chain-linked NADH oxidase system of B. cereus KCTC 3674 possesses an HQNO-sensitive NADH:quinone oxidoreductase that lacks an energy coupling site containing FAD as a cofactor (designated NDH-2). The respiratory inhibitor HQNO inhibits the activity of NADH:ubiquinone-1 oxidoreductase and NADH:menadione oxidoreductase by about 40% and 45%, respectively, at a concentration of 20 μM.[3]

Protocol (from reference)

Cell Assay:

[3]
  • Cell lines

    Bacillus cereus KCTC 3674

  • Concentrations

    10 μM, 20 μM, 30 μM, 40 μM, 50 μM

  • Incubation Time

    --

  • Method

    The assay mixture of NADH:ubiquinone-1 oxidoreductase containes a Triton X-100 extract of B. cereus membranes (10 μg protein), 30 mM KCN, and 50 μM Q-1 in 2 ml of 50 mM MES-KOH (pH 6.0) containing 0.1M NaCl. The activity of NADH: ubiquinone-1 oxidoreductase is measured with various concentrations of HQNO.

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.