Self-assembly of mastoparan X derivative having fluorescence probe in lipid bilayer membrane

Katsuhiko Fujita, Shunsaku Kimura, Yukio Imanishi

研究成果: Contribution to journalArticle

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A mastoparan X (MPX) derivative having an anthryl group at the C-terminal residue was synthesized (MPX-A), and its conformation, orientation and aggregation in phospholipid bilayer membrane were studied. The efficiency of intramolecular energy transfer from the Trp residue to the anthryl group at high peptide dilution suggested α-helical conformation in the lipid membrane, which is consistent with the previous report by NMR of MPX concentrated in the membrane. Either emission from the Trp residue or the anthryl group of MPX-A in the lipid membrane was quenched by 5-doxylstearic acid, suggesting that MPX-A is located at the membrane surface with the helix axis oriented parallel to the surface. The dependence of the excited energy transfer and the fluorescence depolarization of MPX-A on the peptide concentration revealed that MPX-A aggregated in the lipid membrane to form a defined structure.

元の言語英語
ページ(範囲)157-163
ページ数7
ジャーナルBBA - Biomembranes
1195
発行部数1
DOI
出版物ステータス出版済み - 10 12 1994
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Cell Biology

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