Construction of Self-Organized Interface via Monodisperse Block Copolypeptide Amphiphile

Niwa, T.; Tanaka, Masayoshi; Kinoshita, Takatoshi

doi:10.4028/www.scientific.net/AMR.11-12.635

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Home Advanced Materials Research AICAM 2005Construction of Self-Organized Interface via...

Construction of Self-Organized Interface via Monodisperse Block Copolypeptide Amphiphile

Abstract:

In order to construct an intelligent functional nano-interface, the self-organized structure of Langmuir-Blodgett (LB) film was investigated by atomic force microscopy (AFM). As a building block, a monodisperse loop-helix-helix triblock copolypeptide containing the helix of which hydrophobic L-leucine residues align on a single face, “leucine zipper”, was synthesized by recombinant DNA techniques with a designed amino acid sequence. AFM observation on the surface structure of LB films constructed at surface pressures of 2, 5 and 18 mN/m revealed that structural transition from ring- or disk-like aggregations to a lane-like fabrication occurred with compression of the copolypeptide membrane on the water of pH 4. The leucine zipper in the copolypeptide was suggested to perform as an important basis for nanostructure formation through a hydrophobic interaction. Exploitation of the recognition and specific binding sites in the copolypeptide will allow the self-assembling mechanism of the copolypeptide to be developed to a novel nano-template.

Info:

Periodical:

Advanced Materials Research (Volumes 11-12)

Main Theme:

AICAM 2005

Edited by:

Masayuki Nogami, Riguang Jin, Toshihiro Kasuga and Wantai Yang

Pages:

635-638

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.11-12.635

Citation:

T. Niwa et al., "Construction of Self-Organized Interface via Monodisperse Block Copolypeptide Amphiphile", Advanced Materials Research, Vols. 11-12, pp. 635-638, 2006

Online since:

February 2006

Authors:

T. Niwa, Masayoshi Tanaka, Takatoshi Kinoshita

Keywords:

Block Copolypeptide, Langmuir-Blodgett Film, Recombinant DNA Techniques, Self-Assembly

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References

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[5] H. Yokoi, S. Mizutani and T. Kinoshita: Trans. MRS-J. Vol. 27 (2002), p.551.

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