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Kinesin and myosin motors compete to drive rich multiphase dynamics in programmable cytoskeletal composites.
McGorty, Ryan J; Currie, Christopher J; Michel, Jonathan; Sasanpour, Mehrzad; Gunter, Christopher; Lindsay, K Alice; Rust, Michael J; Katira, Parag; Das, Moumita; Ross, Jennifer L; Robertson-Anderson, Rae M.
Afiliación
  • McGorty RJ; Department of Physics and Biophysics, University of San Diego, San Diego, CA 92110, USA.
  • Currie CJ; Department of Physics and Biophysics, University of San Diego, San Diego, CA 92110, USA.
  • Michel J; School of Physics and Astronomy, Rochester Institute of Technology, Rochester, NY 14623, USA.
  • Sasanpour M; Department of Physics and Biophysics, University of San Diego, San Diego, CA 92110, USA.
  • Gunter C; Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182, USA.
  • Lindsay KA; Department of Physics, Syracuse University, Syracuse, NY 13244, USA.
  • Rust MJ; Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637, USA.
  • Katira P; Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182, USA.
  • Das M; School of Physics and Astronomy, Rochester Institute of Technology, Rochester, NY 14623, USA.
  • Ross JL; Department of Physics, Syracuse University, Syracuse, NY 13244, USA.
  • Robertson-Anderson RM; Department of Physics and Biophysics, University of San Diego, San Diego, CA 92110, USA.
PNAS Nexus ; 2(8): pgad245, 2023 Aug.
Article en En | MEDLINE | ID: mdl-37575673
ABSTRACT
The cellular cytoskeleton relies on diverse populations of motors, filaments, and binding proteins acting in concert to enable nonequilibrium processes ranging from mitosis to chemotaxis. The cytoskeleton's versatile reconfigurability, programmed by interactions between its constituents, makes it a foundational active matter platform. However, current active matter endeavors are limited largely to single force-generating components acting on a single substrate-far from the composite cytoskeleton in cells. Here, we engineer actin-microtubule (MT) composites, driven by kinesin and myosin motors and tuned by crosslinkers, to ballistically restructure and flow with speeds that span three orders of magnitude depending on the composite formulation and time relative to the onset of motor activity. Differential dynamic microscopy analyses reveal that kinesin and myosin compete to delay the onset of acceleration and suppress discrete restructuring events, while passive crosslinking of either actin or MTs has an opposite effect. Our minimal advection-diffusion model and spatial correlation analyses correlate these dynamics to structure, with motor antagonism suppressing reconfiguration and demixing, while crosslinking enhances clustering. Despite the rich formulation space and emergent formulation-dependent structures, the nonequilibrium dynamics across all composites and timescales can be organized into three classes-slow isotropic reorientation, fast directional flow, and multimode restructuring. Moreover, our mathematical model demonstrates that diverse structural motifs can arise simply from the interplay between motor-driven advection and frictional drag. These general features of our platform facilitate applicability to other active matter systems and shed light on diverse ways that cytoskeletal components can cooperate or compete to enable wide-ranging cellular processes.
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Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: PNAS Nexus Año: 2023 Tipo del documento: Article

Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: PNAS Nexus Año: 2023 Tipo del documento: Article