The Na+-Translocating ATP-Synthetase from Propionigenium Modestum
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Date
1992
Publication Type
Book Chapter
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yes
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Abstract
ATP synthesis by oxidative phosphorylation in bacteria, mitochondria, or chloroplasts involves the formation of an electrochemical proton gradient (Δμ̃H+) by an electron transport chain and its conversion into the high-energy phosphoric anhydride bond of ATP by an F1F0-type ATPase. 1-3 More recently, the general picture of ATP synthesis was extended by the mechanism termed decarboxylation phosphorylation which, although related to oxidative phosphorylation, includes a number of distinct and unique properties. 4-7 The energy for membrane energization does not derive from oxidation but from a decarboxylation event and is not converted to (Δ03BC;̃H+) but to Δμ̃Na+ (see Chapter ID). The electrochemical Na+ ion gradient (Δμ̃Na+) is used directly for ATP formation by a Na+-translocating F1F0-ATPase.
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Publication status
published
Editor
Book title
Alkali Cation Transport Systems in Prokaryotes
Journal / series
Volume
Pages / Article No.
139 - 154
Publisher
CRC Press