著者

Igseon GU Takuya ISHIDA Tetsu TATSUMA

出版者

The Electrochemical Society of Japan

雑誌

Electrochemistry (ISSN:13443542)

巻号頁・発行日

vol.90, no.7, pp.077006, 2022-07-09 (Released:2022-07-09)

参考文献数

40

被引用文献数

2

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Chiral plasmonic nanostructures attract much attention because of their potential applications to advanced optical materials and enantioselective sensors. However, the latter has been fabricated on the basis of top-down methods, which take time and cost. Here we developed a one-step method for preparation of chiral gold nanostructures immobilized on an electrode by a simple electrodeposition in the presence of L- or D-cysteine. Opposite circular dichroism (CD) spectra were obtained by using L- or D-cysteine, while achiral structures were deposited for racemic cysteine or in the absence of cysteine. The chirality was attributed to geometries of the nanostructures. Chiral gold nanostructures electrodeposited in the presence of L-cysteine gave higher CD signals to (S)-enantiomer than those to (R)-enantiomer of 1,2-propanediol, and vice versa. TiO2-coated electrodes were also used as a substrate for the electrodeposition of chiral nanostructures, so that the chiral plasmonic electrodes would be employed for optoelectronic and photoelectrochemical applications.

著者

Igseon GU Takuya ISHIDA Tetsu TATSUMA

出版者

The Electrochemical Society of Japan

雑誌

Electrochemistry (ISSN:13443542)

巻号頁・発行日

pp.22-00046, (Released:2022-05-17)

被引用文献数

2

著者

Maki Ishiguro Tomonobu Hori Takuya Ishida Makoto Yoshida Koji Takabatake Satoshi Kaneko Kiyohiko Igarashi Masahiro Samejima

出版者

Japanese Society for Plant Biotechnology

雑誌

Plant Biotechnology (ISSN:13424580)

巻号頁・発行日

vol.27, no.3, pp.273-281, 2010-06-25 (Released:2010-07-15)

参考文献数

26

被引用文献数

5 4

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The basidiomycete Flammulina velutipes is one of the most popular edible mushrooms in Japan, and has the ability to grow on cellulosic biomass as a carbon source. In this study, we have isolated two enzymes belonging to glycoside hydrolase (GH) family 7 (FvCel7A and FvCel7B) from the cellulose-grown culture of the fungus, and cloned cDNAs encoding these enzymes by utilizing a transcriptomic database of this fungus. Although both enzymes contain a catalytic domain belonging to GH family 7, only FvCel7A has the family 1 carbohydrate-binding module at the C-terminal. Sequence comparison indicated that FvCel7A and FvCel7B have a similar pattern of disulfide bonds and similar active site architecture to other fungal GH family 7 enzymes, but show small differences at loop regions covering the active site, which may affect the reactivity of cellulosic substrates.