Presentation Information

[SS17-08]Spatiotemporal patterns in biomembranes

*Hiroshi Noguchi1 (1. Institute for Solid State Physics, University of Tokyo (Japan))

Keywords:

Turing pattern,traveling wave,ballistic domain motion

Chemical waves are often observed in living cells. We studied membrane dynamics coupled with reactions using coarse-grained membrane simulations. We present how the mechano-chemical feedback of curvature-inducing proteins changes Turing patterns and reaction waves. The membrane deformation stabilizes Turing patterns, and multi-spindle shapes are formed. The speed of traveling waves is positively or negatively correlated with the local membrane curvature depending on the spontaneous curvature and bending rigidity.
When the curvature-inducing proteins bind to both surfaces of the membrane and move between the two surfaces, moving biphasic domains and time-irreversible fluctuating patterns emerge. The domains move ballistically or diffusively, depending on the conditions.