A Polysaccharide‐Based Container Transportation System Powered by Molecular Motors

Tsuchiya, Youichi; Komori, Tomotaka; Hirano, Minako; Shiraki, Tomohiro; Kakugo, Akira; Ide, T.; Gong, Jianping; Yamada, Sunao; Yanagida, Toshio; Shinkai, Seiji

doi:10.1002/ange.200904909

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…This in vitro motility assay has been used to examine the chemomechanical cycles of molecular motors such as myosin and kinesin, 19 and more recently, to develop artificial nanotransportation systems. 20 Recently, CNTs have been combined with molecular motors to transport CNT by myosin 21 and for the motor-powered translocation of biomolecules along tracks of CNTs or semiconductor nanowires. 22,23 Therefore, molecular motors may prove useful for testing CNTs as novel nanoheaters that regulate the activity of individual biomolecules.…”

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confidence: 99%

“…Recently, CNTs have been combined with molecular motors to transport CNT by myosin and for the motor-powered translocation of biomolecules along tracks of CNTs or semiconductor nanowires. , Therefore, molecular motors may prove useful for testing CNTs as novel nanoheaters that regulate the activity of individual biomolecules. These molecular motors have typical protein functions, such as molecular recognition, the polymerization of components, and enzymatic activity, as well as energy transduction.…”

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confidence: 99%

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Single Carbon Nanotube-Based Reversible Regulation of Biological Motor Activity

et al. 2015

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Because of their small size and high thermal conductivity, carbon nanotubes (CNTs) are excellent candidates for exploring heat transfer at the level of individual molecules in biological research. With a view toward examining the thermal regulation of single biomolecules, we here developed single CNTs as a new platform for observing the motile activity of myosin motors. On multiwall CNTs (diameter ∼170 nm; length ∼10 μm) coated with skeletal-muscle myosin, the ATP-driven sliding of single actin filaments was clearly observable. The normal sliding speed was ∼6 μm/s. Locally irradiating one end of the CNT with a red laser (642 nm), without directly irradiating the active myosin motors, accelerated the sliding speed to ∼12 μm/s, indicating the reversible activation of protein function on a single CNT in real time. The temperature along the CNT, which was estimated from the temperature-dependence of the sliding speed, decreased with the distance from the irradiated spot. Using these results with the finite element method, we calculated a first estimation of the thermal conductivity of multiwall CNTs in solution, as 1540 ± 260 (Wm(-1) K(-1)), which is consistent with the value estimated from the width dependency of multiwall CNTs and the length dependency of single-wall CNTs in a vacuum or air. The temporal regulation of local temperature through individual CNTs should be broadly applicable to the selective activation of various biomolecules in vitro and in vivo.

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Single Carbon Nanotube-Based Reversible Regulation of Biological Motor Activity

et al. 2015

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“…At present, various methods, such as mechanical stirring method, [20] diffusion synthesis method, [21] microwave synthesis method [22] and solvothermal method [23,24] are commonly used to synthesize metal‐organic framework and its composites. Although mechanical agitation method has the advantages of short reaction time, high yield and simple steps, its application is limited by the high price of highly volatile organometallic precursors and the low quality of synthetic crystals.…”

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confidence: 99%

Photoatalytic Degradation of Organic Pollutants in Water Under Visible Light by NH₂‐MIL‐125(Ti‐Zr)@BiOCl_xI_1‐x Composite Photocatalyst

Huang

Zhang

et al. 2022

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Combining two different semiconductors to construct heterojunction is an effective solution to the problem of high recombination rate of photo‐generated carriers. In this work, for further improvement of the photocatalytic performance of NH2‐MIL‐125(Ti−Zr)@BiOCl, NH2‐MIL‐125(Ti−Zr)@BiOClxI1‐x was synthesized by doping BiOI. The influence of BiOI doping amount on the photocatalytic performance of organic pollutant Acid Red B (ARB) was explored. The experimental results showed that the existence of BiOI enhanced the absorption of visible light and further reduced the recombination rate of photo‐generated carriers, thus improved the photocatalytic performance. The characterization of NH2‐MIL‐125(Ti−Zr)@BiOClxI1‐x was performed by XRD, SEM, TEM, EIS, DRS UV‐Vis DRS, and PL. Compared with the photocatalyst NH2‐MIL‐125(Ti−Zr)@BiOCl, the composite photocatalyst NH2‐MIL‐125(Ti−Zr)@BiOCl0.8I0.2 demonstrated superior visible‐light photocatalytic activity. With the illumination time of 90 min, the degradation rate of ARB was 94.6 %. After 3 times of recycling, the degradation rate of ARB was 91 %. The results of free radical quenching experiments showed that the degradation of ARB by NH2‐MIL‐125(Ti−Zr)@BiOCl0.8I0.2 was attributed to the oxidation of ⋅O2− and h+. A preliminary discussion on the photocatalytic mechanism was made.

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“…Sugars and polysaccharides have been used as pharmaceutical materials, foods, molecular motors [25], and water purification [26]. Properties of polysaccharide such as oxidative reaction [27], and 3-D structure have been studied [28].…”

Section: Introductionmentioning

confidence: 99%