Supramolecular chemistry of cyclodextrin-peptide hybrids: Azobenzene-tagged peptides

Akihiko Ueno, Tomoko Shimizu, Hisakazu Mihara, Keita Hamasaki, K. Pitchumani

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

AC17, which is composed of 17 amino acids and has an azobenzene moiety but has no cyclodextrin (CD) unit in the side chain, exhibits 54% helix content. However, ACα17, which has both trans-azobenzene and α-CD, shows 82% helix content. This result suggests that the helix structure is stabilized by host (CD)-guest (azobenzene) bridge in the side chain of the peptide. The helix content changed by trans-cis photoisomerization as shown by 64% helix content for ACα17 in its cis form. This result suggests that cis-azobenzene unit is excluded from the α-CD cavity, thus resulting in the smaller helix content. The helix contents for ACβ17, which has both azobenzene and β-CD, are 94% in the cis form and 87% in the trans form, suggesting that the cis form is included in the β-CD cavity. Azobenzene-tagged CD-peptide hybrids with histidine unit were also prepared and photoregulation of catalytic activity in ester hydrolysis was examined.

Original languageEnglish
Pages (from-to)49-52
Number of pages4
JournalJournal of Inclusion Phenomena
Volume44
Issue number1-4
DOIs
Publication statusPublished - 2002 Dec 1

Keywords

  • Azobenzene
  • Cis-trans photoisomerization
  • Cyclodextrin
  • Peptide
  • Sensor
  • Supramolecular chemistry
  • α-helix

ASJC Scopus subject areas

  • Food Science
  • Chemistry(all)
  • Condensed Matter Physics

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