Electrogenicity of the lysosomal proton pump.

Abstract:

:Using acridine orange as a pH gradient probe, the effects of valinomycin and FCCP on the pH gradient across lysosomal membranes in an ATP-free medium as well as on the rate of the inward ATP-driven proton translocation were investigated. Both lysosome-enriched and highly purified lysosomal preparations from rat liver were used with identical results. Ionophore effects were found to be different depending upon whether passive ion fluxes or ATP-driven H+ translocation were involved and supported the existence of a membrane potential in the latter case. Anions stimulated the rate of ATP-driven proton translocation and stimulation increased with increasing anion lipophilicity. These results strongly support the electrogenic nature of the lysosomal proton pump.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Dell'Antone P

doi

10.1016/0014-5793(84)80198-2

subject

Has Abstract

pub_date

1984-03-12 00:00:00

pages

15-22

issue

1

eissn

0014-5793

issn

1873-3468

journal_volume

168

pub_type

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