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A mathematical modeling of the mitochondrial proton leak via quantum tunneling

  • Received: 06 March 2024 Revised: 26 April 2024 Accepted: 27 May 2024 Published: 04 June 2024
  • The mitochondrion is a vital intracellular organelle that is responsible for ATP production. It utilizes both the concentration gradient and the electrical potential of the inner mitochondrial membrane to drive the flow of protons from the intermembrane space to the matrix to generate ATP via ATP-synthase. However, the proton leak flow, which is mediated via the inner mitochondrial membrane and uncoupling proteins, can reduce the efficiency of ATP production. Protons can exhibit a quantum behavior within biological systems. However, the investigation of the quantum behavior of protons within the mitochondria is lacking particularly in the contribution to the proton leak. In the present study, we proposed a mathematical model of protons tunneling through the inner mitochondrial membrane and the mitochondrial carrier superfamily MCF including uncoupling proteins UCPs and the adenine nucleotide translocases ANTs. According to the model and its assumptions, the quantum tunneling of protons may contribute significantly to the proton leak if it is compared with the classical flow of protons. The quantum tunneling proton leak may depolarize the membrane potential, hence it may contribute to the physiological regulation of ATP synthesis and reactive oxygen species ROS production. In addition to that, the mathematical model of proton tunneling suggested that the proton-tunneling leak may depolarize the membrane potential to values beyond the physiological needs which in turn can harm the mitochondria and the cells. Moreover, we argued that the quantum proton leak might be more energetically favorable if it is compared with the classical proton leak. This may give the advantage for quantum tunneling of protons to occur since less energy is required to contribute significantly to the proton leak compared with the classical proton flow.

    Citation: Mahmoud Abdallat, Abdallah Barjas Qaswal, Majed Eftaiha, Abdel Rahman Qamar, Qusai Alnajjar, Rawand Sallam, Lara Kollab, Mohammad Masa'deh, Anas Amayreh, Hiba Mihyar, Hesham Aboushakra, Bayan Alkelani, Rawan Owaimer, Mohannad Abd-Alhadi, Salwa Ireiqat, Fahed Turk, Ahmad Daoud, Bashar Darawsheh, Ahmad Hiasat, Majd Alhalaki, Shahem Abdallat, Salsabiela Bani Hamad, Rand Murshidi. A mathematical modeling of the mitochondrial proton leak via quantum tunneling[J]. AIMS Biophysics, 2024, 11(2): 189-233. doi: 10.3934/biophy.2024012

    Related Papers:

  • The mitochondrion is a vital intracellular organelle that is responsible for ATP production. It utilizes both the concentration gradient and the electrical potential of the inner mitochondrial membrane to drive the flow of protons from the intermembrane space to the matrix to generate ATP via ATP-synthase. However, the proton leak flow, which is mediated via the inner mitochondrial membrane and uncoupling proteins, can reduce the efficiency of ATP production. Protons can exhibit a quantum behavior within biological systems. However, the investigation of the quantum behavior of protons within the mitochondria is lacking particularly in the contribution to the proton leak. In the present study, we proposed a mathematical model of protons tunneling through the inner mitochondrial membrane and the mitochondrial carrier superfamily MCF including uncoupling proteins UCPs and the adenine nucleotide translocases ANTs. According to the model and its assumptions, the quantum tunneling of protons may contribute significantly to the proton leak if it is compared with the classical flow of protons. The quantum tunneling proton leak may depolarize the membrane potential, hence it may contribute to the physiological regulation of ATP synthesis and reactive oxygen species ROS production. In addition to that, the mathematical model of proton tunneling suggested that the proton-tunneling leak may depolarize the membrane potential to values beyond the physiological needs which in turn can harm the mitochondria and the cells. Moreover, we argued that the quantum proton leak might be more energetically favorable if it is compared with the classical proton leak. This may give the advantage for quantum tunneling of protons to occur since less energy is required to contribute significantly to the proton leak compared with the classical proton flow.


    Abbreviations

    Adenosine triphosphate

    ATP

    Proton motive force

    pmf

    Adenine nucleotide translocase

    ANT

    Uncoupling protein

    UCP

    Reactive oxygen species

    ROS

    Adenosine diphosphate

    ADT

    Guanosine triphosphate

    GTP

    Guanosine diphosphate

    GDP

    Mitochondrial carrier superfamily

    MCF

    Inner mitochondrial membrane

    IMM

    Potential mean force

    PMF

    Intermembrane space

    IMS

    Electron transport chain

    ETC

    加载中


    Data Availability Statement



    The data are available upon a reasonable request from the corresponding author.

    Conflict of Interest



    The authors declare no conflict of interest.

    Author contributions



    Conceptualization, A.B.Q and M.A; methodology, A.B.Q; software, A.B.Q.; validation, A.B.Q, M.A., M.E.,A.R.Q., Q.A., R.S., L.K., M.M., A.A., H.M., H.A., B.A., R.O., M.A., S.I., F.T., A.D., B.D.,A.H., M.A., S.A., S.B.H., and R.M.; formal analysis, A.B.Q.; investigation, A.B.Q..; resources, A.B.Q, M.A., M.E.,A.R.Q., Q.A., R.S., L.K., M.M., A.A., H.M., H.A., B.A., R.O., M.A., S.I., F.T., A.D., B.D.,A.H., M.A.,S.A., S.B.H., and R.M.; data curation, A.B.Q, M.A., M.E.,A.R.Q., Q.A., R.S., L.K., M.M., A.A., H.M., H.A., B.A., R.O., M.A., S.I., F.T., A.D., B.D.,A.H., M.A., S.A., S.B.H., and R.M.; writing—original draft preparation, A.B.Q.; writing—review and editing, A.B.Q, M.A., M.E.,A.R.Q., Q.A., R.S., L.K., M.M., A.A., H.M., H.A., B.A., R.O., M.A., S.I., F.T., A.D., B.D., A.H., M.A., S.A., S.B.H., and R.M.; visualization, A.B.Q.; supervision, M.A. and R.M..; project administration, M.A. and R.M. All authors have read and agreed to the published version of the manuscript.

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