Actomyosin motility on nanostructured surfaces

Richard Bunk, J Klinth, Lars Montelius, IA Nicholls, Pär Omling, S Tagerud, A Mansson

Research output: Contribution to journalArticlepeer-review

74 Citations (SciVal)

Abstract

We have here, for the first time, used nanofabrication techniques to reproduce aspects of the ordered actomyosin arrangement in a muscle cell. The adsorption of functional heavy meromyosin (HMM) to five different resist polymers was first assessed. One group of resists (MRL-6000.1XP and ZEP-520) consistently exhibited high quality motility of actin filaments after incubation with HMM. A second group (PMMA-200, PMMA-950, and MRI-9030) generally gave low quality of motility with only few smoothly moving filaments. Based on these findings electron beam lithography was applied to a bi-layer resist system with PMMA-950 on top of MRL-6000.1XP. Grooves (100-200 nm wide) in the PMMA layer were created to expose the MRL-6000.1XP surface for adsorption of HMM and guidance of actin filament motility. This guidance was quite efficient allowing no U-turns of the filaments and approximately 20 times higher density of moving filaments in the grooves than on the surrounding PMMA.
Original languageEnglish
Pages (from-to)783-788
JournalBiochemical and Biophysical Research Communications
Volume301
Issue number3
DOIs
Publication statusPublished - 2003

Subject classification (UKÄ)

  • Biological Sciences

Keywords

  • beam lithography
  • electron
  • nanotechnology
  • resist polymer
  • motility assay
  • actin
  • myosin
  • atomic force microscope

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