Effects of His mutations on the fibrillation of amyloidogenic Vλ6 protein Wil under acidic and physiological conditions

Tomonori Mishima, Takatoshi Ohkuri, Akira Monji, Takaaki Kanemaru, Yoshito Abe, Tadashi Ueda

研究成果: ジャーナルへの寄稿記事

5 引用 (Scopus)

抄録

Recently, we showed that the recombinant (r) Vλ6 protein Wil exhibits a more disrupted residual structure and a longer lag time for fibril formation than the rVλ6 protein Jto under highly unfolding conditions at pH 2. Here, we focused on the roles of three histidine residues specific for Wil, which are positively charged at pH 2 and could repel one another. Heteronuclear relaxation experiments revealed that a mutant Wil with H34Q, H53Q and H93S mutations (3HmutWil) had larger R2 values only in the region of residues 22-55 and formed fibrils much earlier than Wil at pH 2. 3HmutWil also showed a decrease in ThT fluorescence intensity compared with Wil in fibrillation experiments at pH 7.5. The present results suggest that these three histidine residues play important roles in the fibrillation of Wil at both pH 2 and pH 7.5.

元の言語英語
ページ(範囲)615-620
ページ数6
ジャーナルBiochemical and Biophysical Research Communications
391
発行部数1
DOI
出版物ステータス出版済み - 1 1 2010

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Amyloidogenic Proteins
Histidine
Mutation
Proteins
Experiments
Fluorescence

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Biophysics
  • Cell Biology
  • Molecular Biology

これを引用

Effects of His mutations on the fibrillation of amyloidogenic Vλ6 protein Wil under acidic and physiological conditions. / Mishima, Tomonori; Ohkuri, Takatoshi; Monji, Akira; Kanemaru, Takaaki; Abe, Yoshito; Ueda, Tadashi.

:: Biochemical and Biophysical Research Communications, 巻 391, 番号 1, 01.01.2010, p. 615-620.

研究成果: ジャーナルへの寄稿記事

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AU - Monji, Akira

AU - Kanemaru, Takaaki

AU - Abe, Yoshito

AU - Ueda, Tadashi

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