Jan 15, 1976

Stimulation of ATP synthesis in Halobacterium halobium R1 by light-induced or artifically created proton electrochemical potential gradients across the cell membrane

Biochimica Et Biophysica Acta
A Danon, S R Caplan

Abstract

The relationship between proton movement and phosphorylation in Halo-bacterium halobium R1 has been investigated under anaerobic conditions. The light-induced changes in the bacteriorhodopsin are accompanied by proton movements across the membrane which result in pH changes in the suspending medium. The initial alkaline shift is shown to be closely paralleled by (and hence correlated with) ATP synthesis. Acidification of the medium in the presence of valinomycin, under conditions of low external potassium, brings about ATP synthesis in the dark.

  • References5
  • Citations21

References

Mentioned in this Paper

Bacteriorhodopsins
ATP Synthesis Pathway
Valinomycin
Darkness
Potassium
Protein Phosphorylation
Carbonyl Cyanide m-Chlorophenyl Hydrazone
Acidification - ActCode
Light
Anaerobiosis

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