Molecular Motors: Chemomechanical Coupling and Free Energy Transduction


    Molecular motors are able to convert the chemical energy released from nucleotide hydrolysis into mechanical work. This chemomechanical coupling exhibits some universal features [1] and has to satisfy several thermodynamic constraints in the form of balance conditions for the possible enzymatic pathways or motor cycles [2] [3]. In fact, molecular motors with several catalytic domains are governed by several competing motor cycles as has been explicitly shown for kinesin [4] [5] and myosin V [6].
    Two elastically coupled molecular motors are governed by rather complex chemomechanical networks, which involve, however, only two parameters in addition to those that describe the kinetics of a single motor [7].

  • A. Krukau, V. Knecht, and R. Lipowsky
    Allosteric control of kinesin's motor domain by tubulin: a molecular dynamics study.
    Allosteric control of kinesin's motor domain by tubulin ... - Supporting Information
    Phys. Chem. Chem. Phys. 16, 6189-6198 (2014).

  • V. Bierbaum and R. Lipowsky
    Dwell time distritubutions of the molecular motor myosin V.
    PLoS ONE 8, e55366 (2013)

  • C. Keller, F. Berger, S. Liepelt, and R. Lipowsky
    Network complexity and parametric simplicity for cargo transport by two molecular motors.
    J. Stat. Phys. 150, 205-234 (2013)

  • V. Bierbaum and R. Lipowsky
    Chemomechanical coupling and motor cycles of myosin V.
    Chemomechanical coupling ... of myosin V - Supporting Information.
    Biophys. J. 100, 1747-1755 (2011).

  • S. Liepelt and R. Lipowsky
    Impact of slip cycles on the operation modes and efficiency of molecular motors.
    J. Stat. Phys. 141, 1-16 (2010).

  • R. Lipowsky, S. Liepelt, and A. Valleriani
    Energy conversion by molecular motors coupled to nucleotide hydrolysis.
    J. Stat. Phys. 135, 951-975 (2009).

  • S. Liepelt and R. Lipowsky
    Operation modes of the molecular motor kinesin.
    Phys. Rev. E 79, 011917 (2009).

  • A. Valleriani, S. Liepelt, and R. Lipowsky
    Dwell time distributions for kinesin's mechanical steps.
    EPL 82, 28011 (2008).

  • R. Lipowsky and S. Liepelt
    Chemomechanical coupling of molecular motors: Thermodynamics, network representations, and balance conditions.
    J. Stat. Phys. 130, 39 - 67 (2008).
    Chemomechanical coupling of molecular motors ... - Erratum.

    J. Stat. Phys. 135, 777-778 (2009).

  • S. Liepelt and R. Lipowsky
    Kinesin's network of chemomechanical motor cycles.
    Phys. Rev. Lett. 98, 258102 (2007).
    Kinesin's network of chemomechanical motor cycles - Appendices.

  • S. Liepelt and R. Lipowsky
    Steady-state balance conditions for molecular motor cycles and stochastic nonequilibrium processes.
    EPL 77, 50002 (2007).

  • R. Lipowsky, Y. Chai, S. Klumpp, S. Liepelt and M.J.I. Müller
    Molecular motor traffic: From biological nanomachines to macroscopic transport.
    Physica A 372, 34 - 51 (2006).

  • R. Lipowsky and S. Klumpp
    'Life is Motion': Multiscale motility of molecular motors.
    Physica A 352, 53-112, (2005).

  • R. Lipowsky and N. Jaster
    Molecular Motor Cycles: From ratchets to networks.
    J. Stat. Phys. 110, 1141-1167 (2003).

  • R. Lipowsky.
    Movements of molecular motors.
    In "Biological Physics 2000" ed. by V. Sa-yakanit, L. Matsson, and H. Frauenfelder
    (World Scientific, Singapore 2001) p. 41-55.

  • R. Lipowsky.
    Universal aspects of the chemo-mechanical coupling for molecular motors.
    Phys. Rev. Lett. 85 , 4401-4404 (2000).

  • R. Lipowsky.
    Molecular motors and stochastic models
    In ''Stochastic Processes in Physics, Chemistry, and Biology'',
    ed. by J.A. Freund and T. Pöschel,
    ''Lecture Notes in Physics'', Vol. 557, pages 21 - 31
    (Springer, Berlin 2000).

  • R. Lipowsky and T. Harms.
    Molecular motors and nonuniform ratchets.
    Eur. Biophys. J. 29 , 542-548 (2000).

  • T. Harms and R. Lipowsky.
    Driven Ratchets with Frozen Disorder.
    Phys. Rev. Lett. 79 , 2895-2898 (1997).