Direct interaction between amphotericin B and ergosterol in lipid bilayers as revealed by 2H NMR spectroscopy

Nobuaki Matsumori, Kazuaki Tahara, Hiroko Yamamoto, Atsushi Morooka, Mototsugu Doi, Tohru Oishi, Michio Murata

研究成果: Contribution to journalArticle査読

58 被引用数 (Scopus)

抄録

Although amphotericin B (AmB) is thought to exert its antifungal activity by forming transmembrane ion-permeable self-assemblies together with ergosterol, no previous study has directly proven AmB-ergosterol interaction. To establish the interaction, we measured 2H NMR using deuterium-labeled sterols and AmB. The 2H NMR spectra of deuterated ergosterol in palmitoyloleoylphosphatidylcholine (POPC) bilayers showed that fast axial diffusion of erogosterol was almost completely inhibited by the coexistence of AmB. Conversely, cholesterol mobility in POPC membrane was essentially unchanged with or without AmB. These results unequivocally demonstrate that ergosterol has significant interaction with AmB in POPC bilayers. In addition, we examined the mobility of AmB using deuterium-labeled AmB, and found that, although AmB is almost immobilized in sterol-free and cholesterol-containing POPC membranes, a certain ratio of AmB molecules acquires mobility in the presence of ergosterol. The similar mobility of AmB and ergosterol in POPC bilayers confirmed the idea of the direct intermolecular interaction between ergosterol and AmB.

本文言語英語
ページ(範囲)11855-11860
ページ数6
ジャーナルJournal of the American Chemical Society
131
33
DOI
出版ステータス出版済み - 8 26 2009
外部発表はい

All Science Journal Classification (ASJC) codes

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学

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