DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium.

DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium. Research Abstract Details 

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DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium. Abstract Text:

N Murakami,T Konishi,

The effects of N,N'-dicyclohexylcarbodiimide (DCCD) and various ionophores on light-induced 22Na+-transport were studied in right-side-out membrane vesicles from Halobacterium halobium R1M1. The light-induced Na+ efflux was inhibited at the same DCCD concentration (greater than 40 nmol/mg protein) as required for inhibition of the Na+-dependent membrane potential (delta phi) formation. This supports our previous indication that the DCCD-sensitive, Na+-dependent transformation of pH-gradient (delta pH) into delta phi is mediated by Na+/H+-antiporter (Murakami, N. and Konishi, T. (1985) J. Biochem. 98, 897-907). FCCP or a combination of valinomycin and triphenyltin (TPT) inhibits the light-induced Na+ efflux in accordance with the notion of protonmotive force (delta mu H+)-driven antiporter. However, a marked lag in initiation of the Na+ efflux occurred in the presence of valinomycin, TPMP+, or a small amount of FCCP, suggesting that a gating step is involved in the Na+ efflux. On the other hand, the delta pH-dissipating ionophore TPT did not cause the lag. A simultaneous determination of delta phi, delta pH, and Na+ efflux rate at the initial stage of illumination revealed that the antiporter is gated by delta phi rather than delta mu H+.

DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium. Publishing Authors By Initials

N Murakami,T Konishi,

For similar polycyclic compounds: macrocyclic compounds: peptides, cyclic: depsipeptides: valinomycin research abstracts see: polycyclic compounds: macrocyclic compounds: peptides, cyclic: depsipeptides: valinomycin research

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DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of biochemistry

VOLUME: 103

Page Numbers: 231-6

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Feb

YEAR: 1988

DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium. Information

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LANGUAGE: eng

NlmUniqueID: 376600

DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium. Keywords Mesh Terms:

KEYWORDS: Valinomycin

MESH TERMS: pharmacology

Chemical & Substance for Abstract: DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium. Information

Substance Name: Sodium

Registry Number: 7440-23-5

Grant and Affiliation Information for DCCD-sensitive Na+-transport in the membrane vesicles of Halobacterium halobium.

AFFILIATION: Department of Radiochemistry-Biology, Niigata College of Pharmacy.

Country: JAPAN

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MEDLINETA: J Biochem

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