The dynamics of small excitable ion channel clusters.

Through computational modeling we predict that small sodium ion channel clusters on small patches of membrane can encode electric signals most efficiently at certain magic cluster sizes. We show that this effect can be traced back to algebraic features of small integers and are universal for channels with a simple gating dynamics. We further explore physiologic conditions under which such effects can occur.

[1]  P Hänggi,et al.  Effect of channel block on the spiking activity of excitable membranes in a stochastic Hodgkin–Huxley model , 2004, Physical biology.

[2]  勇一 作村,et al.  Biophysics of Computation , 2001 .

[3]  Peter Jung,et al.  Optimal sizes of ion channel clusters , 2001 .

[4]  P. Jung,et al.  Entropically enhanced excitability in small systems. , 2005, Physical review letters.

[5]  A. Hodgkin,et al.  A quantitative description of membrane current and its application to conduction and excitation in nerve , 1952, The Journal of physiology.

[6]  B. Hille,et al.  Ionic channels of excitable membranes , 2001 .

[7]  Takafumi Inoue,et al.  Cluster Formation of Inositol 1,4,5-Trisphosphate Receptor Requires Its Transition to Open State* , 2005, Journal of Biological Chemistry.

[8]  I. Goychuk,et al.  Stochastic resonance as a collective property of ion channel assemblies , 2001, physics/0106036.

[9]  C. Gardiner Handbook of Stochastic Methods , 1983 .

[10]  P. Shrager Ionic channels and signal conduction in single remyelinating frog nerve fibres. , 1988, The Journal of physiology.

[11]  P. Jung,et al.  Optimal intracellular calcium signaling. , 2002, Physical review letters.

[12]  A. Pikovsky,et al.  System size resonance in coupled noisy systems and in the Ising model. , 2002, Physical review letters.

[13]  Igor Goychuk,et al.  Channel noise and synchronization in excitable membranes , 2003 .

[14]  P. Jung,et al.  Optimal ion channel clustering for intracellular calcium signaling , 2003, Proceedings of the National Academy of Sciences of the United States of America.

[15]  Fox,et al.  Emergent collective behavior in large numbers of globally coupled independently stochastic ion channels. , 1994, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[16]  J Kurths,et al.  Doubly stochastic coherence via noise-induced symmetry in bistable neural models. , 2003, Physical review letters.

[17]  James P. Keener,et al.  Mathematical physiology , 1998 .