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Respiration-linked Proton Translocation Coupled to Anaerobic Reduction of manganese(IV) and iron(III) in Shewanella Putrefaciens MR-1

Respiration-linked Proton Translocation Coupled to Anaerobic Reduction of manganese(IV) and iron(III) in Shewanella Putrefaciens MR-1

C R Myers, K H Nealson

J Bacteriol. 1990 Nov;172(11):6232-8.

PMID: 2172208

Abstract:

An oxidant pulse technique, with lactate as the electron donor, was used to study respiration-linked proton translocation in the manganese- and iron-reducing bacterium Shewanella putrefaciens MR-1. Cells grown anaerobically with fumarate or nitrate as the electron acceptor translocated protons in response to manganese (IV), fumarate, or oxygen. Cells grown anaerobically with fumarate also translocated protons in response to iron(III) and thiosulfate, whereas those grown with nitrate did not. Aerobically grown cells translocated protons only in response to oxygen. Proton translocation with all electron acceptors was abolished in the presence of the protonophore carbonyl cyanide m-chlorophenylhydrazone (20 microM) and was partially to completely inhibited by the electron transport inhibitor 2-n-heptyl-4-hydroxyquinoline N-oxide (50 microM).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP25440146-A	Iron(III) ionophore IV		25440-14-6	Price

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