Biomaterial Database

Bactericidal action of 2-hydroxy-3-(cyclohexylpropyl)-1,4-naphthoquinone on Bacillus megaterium. 1971

J G Olenick, and T M Cook, and F E Hahn

The antimalarial drug, 2-hydroxy-3-(cyclohexylpropyl)-1,4-naphthoquinone (NQ), at concentrations of approximately 10(-5)m (3 mug/ml), was bactericidal for the gram-positive bacterium, Bacillus megaterium. Only a few other gram-positive bacteria were sensitive to this drug. All growth inhibitory concentrations of NQ were also bactericidal for B. megaterium, and even resting suspensions of cells were killed. The incorporation of radioactive-labeled leucine, thymidine, uracil, and diaminopimelic acid into protein, deoxyribonucleic acid, ribonucleic acid, and the cell wall polymer was arrested immediately and completely upon addition of NQ to cultures in exponential growth. NQ produced a delayed effect on aerobic respiration and no change in the rate of oxygen consumption was observed at a time when all major biosyntheses had failed. (3)H-NQ was demonstrated to bind strongly and preferentially to the bacterial cell membrane. This simultaneous shutdown of all major categories of in vivo macromolecular syntheses points to an effect of NQ upon membrane-centered energy supplying reactions or transport of essential nutrients, or both.

UI	MeSH Term	Description	Entries
D007930	Leucine	An essential branched-chain amino acid important for hemoglobin formation.	L-Leucine,Leucine, L-Isomer,L-Isomer Leucine,Leucine, L Isomer
D008365	Manometry	Measurement of the pressure or tension of liquids or gases with a manometer.	Tonometry,Manometries
D009285	Naphthoquinones	Naphthalene rings which contain two ketone moieties in any position. They can be substituted in any position except at the ketone groups.	Naphthalenediones,Naphthazarins,Naphthoquinone
D010101	Oxygen Consumption	The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)	Consumption, Oxygen,Consumptions, Oxygen,Oxygen Consumptions
D002247	Carbon Isotopes	Stable carbon atoms that have the same atomic number as the element carbon but differ in atomic weight. C-13 is a stable carbon isotope.	Carbon Isotope,Isotope, Carbon,Isotopes, Carbon
D002462	Cell Membrane	The lipid- and protein-containing, selectively permeable membrane that surrounds the cytoplasm in prokaryotic and eukaryotic cells.	Plasma Membrane,Cytoplasmic Membrane,Cell Membranes,Cytoplasmic Membranes,Membrane, Cell,Membrane, Cytoplasmic,Membrane, Plasma,Membranes, Cell,Membranes, Cytoplasmic,Membranes, Plasma,Plasma Membranes
D002470	Cell Survival	The span of viability of a cell characterized by the capacity to perform certain functions such as metabolism, growth, reproduction, some form of responsiveness, and adaptability.	Cell Viability,Cell Viabilities,Survival, Cell,Viabilities, Cell,Viability, Cell
D002473	Cell Wall	The outermost layer of a cell in most PLANTS; BACTERIA; FUNGI; and ALGAE. The cell wall is usually a rigid structure that lies external to the CELL MEMBRANE, and provides a protective barrier against physical or chemical agents.	Cell Walls,Wall, Cell,Walls, Cell
D002621	Chemistry	A basic science concerned with the composition, structure, and properties of matter; and the reactions that occur between substances and the associated energy exchange.
D003470	Culture Media	Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.	Media, Culture