Affinity for α-tocopherol transfer protein as a determinant of the biological activities of vitamin E analogs

Akihiro Hosomi, Makoto Arita, Yuji Sato, Chikako Kiyose, Tadahiko Ueda, Osamu Igarashi, Hiroyuki Arai, Keizo Inoue

研究成果: Article査読

500 被引用数 (Scopus)

抄録

α-Tocopherol transfer protein (αTTP), a product of the gene which causes familial isolated vitamin E deficiency, plays an important role in determining the plasma vitamin E level. We examined the structural characteristics of vitamin E analogs required for recognition by αTTP. Ligand specificity was assessed by evaluating the competition of non-labeled vitamin E analogs and α-[3H]tocopherol for transfer between membranes in vitro. Relative affinities (RRR-α-tocopherol=100%) calculated from the degree of competition were as follows: β-tocopherol, 38%; γ-tocopherol, 9%; δ-tocopherol, 2%; α-tocopherol acetate, 2%; α-tocopherol quinone, 2%; SRR-α-tocopherol, 11%; α:-tocotrienol, 12%; trolox, 9%. Interestingly, there was a linear relationship between the relative affinity and the known biological activity obtained from the rat resorption-gestation assay. From these observations, we conclude that the affinity of vitamin E analogs for αTTP is one of the critical determinants of their biological activity.

本文言語English
ページ(範囲)105-108
ページ数4
ジャーナルFEBS Letters
409
1
DOI
出版ステータスPublished - 1997 6 2
外部発表はい

ASJC Scopus subject areas

  • 生物理学
  • 構造生物学
  • 生化学
  • 分子生物学
  • 遺伝学
  • 細胞生物学

フィンガープリント

「Affinity for α-tocopherol transfer protein as a determinant of the biological activities of vitamin E analogs」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル