6533b838fe1ef96bd12a3ecf

RESEARCH PRODUCT

Intracellular pH-dependent efflux of the fluorescent probe pyranine in the yeast Yarrowia lipolytica.

Jean-marc BelinMario AguedoYves Waché

subject

CytoplasmMESH: Hydrogen-Ion ConcentrationCell Membrane Permeability[SDV.BIO]Life Sciences [q-bio]/BiotechnologyOctanoic Acidschemistry.chemical_compoundMESH : Fluorescent DyesMESH: Cell Membrane PermeabilityArylsulfonates[INFO.INFO-BT]Computer Science [cs]/BiotechnologyMESH: ArylsulfonatesMESH : Octanoic AcidsbiologyCaprylic acidHydrogen-Ion ConcentrationMESH: Fluorescent DyesFluorescenceBiochemistryEffluxCaprylates[ INFO.INFO-BT ] Computer Science [cs]/BiotechnologyIntracellularMESH : CytoplasmIntracellular pHMESH: Biological Transport[SDV.BC]Life Sciences [q-bio]/Cellular BiologyMicrobiologyPyranineMESH : ArylsulfonatesMESH : Hydrogen-Ion ConcentrationGeneticsMESH: SaccharomycetalesMolecular Biology[SDV.BC] Life Sciences [q-bio]/Cellular BiologyFluorescent Dyes[ SDV.BC ] Life Sciences [q-bio]/Cellular BiologyMESH: Cytoplasm[ SDV.BIO ] Life Sciences [q-bio]/BiotechnologyYarrowiaBiological TransportMESH : Saccharomycetalesbiology.organism_classificationMESH: Octanoic AcidsYeast[SDV.BIO] Life Sciences [q-bio]/BiotechnologyMESH : Biological Transport[INFO.INFO-BT] Computer Science [cs]/BiotechnologychemistryMESH : Cell Membrane PermeabilitySaccharomycetales

description

International audience; 8-Hydroxypyrene-1,3,6-trisulfonic acid (pyranine) can be used as a vital intracellular pH (pH(i)) indicator. In the yeast Yarrowia lipolytica, a partial efflux of the probe was detected by using the pH-independent wavelength of 415 nm. A simplified correction of the fluorescent signals was applied, enabling to show for this species a good near-neutral pH(i) maintenance capacity in a pH 3.9 medium. Octanoic acid, which is known to have toxic effects on yeast, decreased the pH(i) and increased the 260-nm-absorbing compounds leakage. However, this acid inhibited the fluorescent probe efflux linearly with its concentration suggesting a pH(i)-dependent efflux of pyranine from cells.

https://hal.archives-ouvertes.fr/hal-00368232