Journal of Bioenergetics and Biomembranes

, Volume 43, Issue 6, pp 601–610 | Cite as

New perspectives on photosynthetic phosphorylation in the light of a torsional mechanism of energy transduction and ATP synthesis

  • Sunil Nath
  • Ravikrishnan Elangovan


New perspectives on photophosphorylation have been offered from the standpoint of the torsional mechanism of energy transduction and ATP synthesis. New experimental data on the involvement of malate anions in ATP synthesis in an acid-base malate bath procedure has been reported on spinach chloroplast thylakoids as the model system. The data cannot be reconciled with the chemiosmotic theory but has been shown to be naturally explained by the torsional mechanism. The path of malic acid in the acid and base stages of the experiment has been traced, offering further strong support to the new paradigm. Classical observations in the field have been re-interpreted in the light of these findings. A new concept of ion translocation, energy transduction and coupling at the overall physiological level in photophosphorylation has been presented and a large number of novel experimentally testable predictions have been made and shown to arise as logical consequences of the new perspectives.


Bioenergetics Photosynthesis Photophosphorylation F1FO-ATP synthase Chloroplasts Torsion Torsional mechanism Chemiosmotic theory Anions Malate Photosystem I Photosystem II Coupling Multidrug resistance 


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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Biochemical Engineering and BiotechnologyIndian Institute of Technology, DelhiNew DelhiIndia

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