Key result
Mechanically deposited fluoropolymer ridges preserve heavy meromyosin function to enable linear actin filament movement.
Why the study?
Arranging motor protein molecules linearly on a substrate to regulate the direction of movement generated by the motor protein was investigated.
Motor proteins can be linearly arranged on a mechanically deposited fluoropolymer thin film while retaining their function to move actin filaments.
Answers are grounded in this paper and cite their sources.
Enables in vitro directional control of motor protein motility; leaves open translation to nanodevices pending further validation.
Motor protein molecules such as heavy meromyosin (HMM), one of the major components of skeletal muscle, were arranged linearly on a mechanically deposited fluoropolymer thin film substrate in order to regulate the direction of movement generated by the motor protein. The fluoropolymer film consisted of many linear parallel ridges whose heights and widths were 10 to 20 nm and 10 to 100 nm, respectively. The fluoropolymer ridges adsorbed HMM molecules that were applied onto the film. Actin filaments labeled with rhodamine-phalloidin were observed under a fluorescence microscope moving linearly on the HMM-coated ridges. The observation indicates that HMM molecules were aligned on the fluoropolymer ridges while retaining their function. The velocity of actin movement was measured in this system.
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Suzuki et al. (1995) studied this question. Mechanically deposited fluoropolymer thin film substrate was evaluated on Linear movement of actin filaments. Heavy meromyosin molecules aligned on mechanically deposited fluoropolymer ridges retained their function, allowing actin filaments to move linearly along the coated ridges.
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