Steady-state and time-resolved fluorescence spectroscopic studies on interaction of the N-terminal region with the hairpin loop of the phytocystain Scb

Keiko Doi-Kawano, Etsuko Nishimoto, Yoshiaki Kouzuma, Daisuke Takahashi, Shoji Yamashita, Makoto Kimura

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)

抄録

The steady-state and time-resolved fluorescece spectroscopy is one of the most powerful method to detect and analyze subtle conformation change and interaction between peptide elements in protein. Phytocystatin Scb isolated from sunflower seeds includes a single Trp residue at position 85. In an attempt to investigate the interaction of the N-terminal region of Scb with the first and second hairpin loops by fluorescence spectroscopy of Trp residue, two Scb mutants in which single Trp locates at position 52 and 58, respectively, and their N-terminal removed mutants were generated. The N-terminal truncation changed the fluorescence decay kinetics of Trp52 from the triple exponential to double. Furthermore, the time-resolved fluorescence anisotropy residue indicated that the segmental motion of Trp52 was significantly enhanced by its N-terminal truncation. In contrast, Trp58 and Trp85 had little influence. The N-terminal successive truncations of Scb and its mutants resulted in the weaken inhibitors to papain. These results suggested that the N-terminal region of Scb interacts with the peptide segment preceding the first hairpin loop, thereby stabilizing the conformation of the hairpin loop structure.

本文言語英語
ページ(範囲)631-639
ページ数9
ジャーナルJournal of Fluorescence
19
4
DOI
出版ステータス出版済み - 7月 1 2009

!!!All Science Journal Classification (ASJC) codes

  • 生化学
  • 臨床心理学
  • 社会科学(その他)
  • 社会学および政治科学
  • 分光学
  • 臨床生化学
  • 法学

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