Gene duplication as a means for altering H+/ATP ratios during the evolution of Fo F1 ATPases and synthases
@article{Cross1990GeneDA, title={Gene duplication as a means for altering H+/ATP ratios during the evolution of Fo F1 ATPases and synthases}, author={Richard L. Cross and Lincoln Taiz}, journal={FEBS Letters}, year={1990}, volume={259} }
80 Citations
The evolution of A‐, F‐, and V‐type ATP synthases and ATPases: reversals in function and changes in the H+/ATP coupling ratio
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Recent discoveries concerning the structure of the ATPases, their assembly and the stoichiometry of their numerous subunits, particularly the proton-carrying proteolipid (subunit c) of the FO and V0 sectors, have shed new light on this question and raise the possibility of variable coupling ratios modulated by variable proteolIPid stoichiometries.
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Proton pumping ATPases/ATPsynthases are found in all groups of present-day organisms. The structure of V- and F-type ATPases/ATP synthases is very conserved throughout evolution. Sequence analysis…
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Membrane-bound ATP synthases of bacteria serve two important physiological functions: the enzyme catalyzes the synthesis of ATP from ADP and inorganic phosphate utilizing the energy of an electrochemical ion gradient and generating a transmembrane ion gradient at the expense of ATP hydrolysis.
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A correlation between structure and function of ATPases has been established and the location of the last common ancestor of the major domains of living organisms (archaebacteria, eubacteria and eukaryotes) can be located in the tree of life without assuming constant or equal rates of change in the different branches.
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- Biology, ChemistryProceedings of the National Academy of Sciences
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The data show that the thermodynamic H+/ATP ratio depends on the stoichiometry of the c-subunit, although it is not identical to the c/β ratio.
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- Chemistry, BiologyThe Journal of biological chemistry
- 1998
The results show that there are 12 copies of subunit c per F0 in E. coli, the exact number having both mechanistic and structural significance.
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Barring convergent emergence of the same set of ligands in several lineages, these findings indicate that the use of sodium gradient for ATP synthesis is the ancestral modality of membrane bioenergetics.
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