Abstract
We examined the adsorption of DNA binding proteins on functionalized, single-walled carbon nanotubes (SWNTs). When SWNTs were functionalized with polyethylene glycol (PEG-SWNT), moderate adsorption of protein molecules was observed. In contrast, nanotubes functionalized with CONH2 groups (CONH2-SWNT) exhibited very strong interactions between the CONH2-SWNT and DNA binding proteins. Instead, when these SWNT surfaces were wrapped with DNA molecules (thymine 30-mers), protein binding was a little decreased. Our results revealed that DNA wrapped PEG-SWNT was one of the most promising candidates to realize DNA nanodevices involving protein reactions on DNA-SWNT surfaces. In addition, the DNA binding protein RecA was more adhesive than single-stranded DNA binding proteins to the functionalized SWNT surfaces.
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This work was supported by a Grant-in-Aid for Scientific Research (26400436) of the Japan Society for the Promotion of Science (JSPS).
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Ishibashi, Y., Oura, S. & Umemura, K. Adsorption of DNA binding proteins to functionalized carbon nanotube surfaces with and without DNA wrapping. Eur Biophys J 46, 541–547 (2017). https://doi.org/10.1007/s00249-017-1200-3
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DOI: https://doi.org/10.1007/s00249-017-1200-3