Novel Catchbond mediated oscillations in motor-microtubule complexes

Abstract

Generation of mechanical oscillation is ubiquitous to wide variety of intracellular processes. We show that catchbonding behaviour of motor proteins provides a generic mechanism of generating spontaneous oscillations in motor-cytoskeletal filament complexes. We obtain the phase diagram to characterize how this novel catch bond mediated mechanism can give rise to bistability and sustained limit cycle oscillations and results in very distinctive stability behaviour, including bistable and non-linearly stabilised in motor-microtubule complexes in biologically relevant regimes. Hitherto, it was thought that the primary functional role of the biological catchbond was to improve surface adhesion of bacteria and cell when subjected to external forces or flow field. Instead our theoretical study shows that the imprint of this catch bond mediated physical mechanism would have ramifications for whole gamut of intracellular processes ranging from oscillations in mitotic spindle oscillations to activity in muscle fibres.

arXiv comment5 pages, 4 figures + Supplementary Mat

References in corpus (10)

• Tug-of-war as a cooperative mechanism for bidirectional cargo transport by molecular motors
• Cooperative Cargo Transport by Several Molecular Motors
• Spontaneous waves in muscle fibres
• Generation of stable overlaps between antiparallel filaments
• Enhancement of cargo processivity by cooperating molecular motors
• Dynein catch bond as a mediator of codependent bidirectional cellular transport
• Cooperative Protofilament Switching Emerges from Inter-Motor Interference in Multiple-Motor Transport
• Bidirectional motion of filaments: Role of motor proteins and passive cross linkers
• Mechanical stability of bipolar spindle assembly
• Stabilization of overlapping biofilaments by passive crosslinkers