Lemeshko VV. Is the mitochondrial ATP synthesis solely H
+-driven, K
+,H
+ symport-driven or K
+/H
+ antiport-driven?
BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2024;
1866:184229. [PMID:
37704041 DOI:
10.1016/j.bbamem.2023.184229]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/02/2023] [Accepted: 09/06/2023] [Indexed: 09/15/2023]
Abstract
Some recent literature experimental data indicate that the mitochondrial ATP synthesis might be not solely H+-driven, but K+,H+ symport-driven membrane potential-dependent, considered as a further development of Mitchell's chemiosmotic theory, in contrast to the anti-Mitchell's hypothesis of K+/H+ antiport-driven mechanism. In this short communication, the attention was pointed to a possible influence of the ionic strength of the used KCl incubation medium, versus of only K+ ions, and of the Mg2+-induced mitochondrial aggregation in the sucrose medium on the reported rates of the mitochondrial respiration and ATP synthesis. These observations were based on the own author's experimental works published earlier.
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