Three-dimensional structure of lipid vesicles embedded in vitreous ice and investigated by automated electron tomography

K. Dierksen, D. Typke, R. Hegerl, J. Walz, E. Sackmann, W. Baumeister

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

80 Zitate (Scopus)

Abstract

Automated electron tomography is shown to be a suitable means to visualize the shape of phospholipid vesicles embedded in vitrified ice. With a slow-scan charge-coupled device camera as a recording device, the cumulative electron dose needed to record a data set of 60 projections at a magnification of 20,000X can be kept as low as 15 e-/A2 (or 1500 electrons/nm2). The membrane of the three-dimensionally reconstructed vesicles is clearly visible in two-dimensional sections through the three-dimensionally reconstructed volume. Some edges indicating a polygonal shape of the vesicles, frozen from the gel phase, are also clearly recognized. Because of the presently limited tilt angle range (+/- 60 degrees), the upper and lower "caps" of the vesicles (representing about 35% of the surface of the ellipsoidal particles) remain invisible in the three-dimensional reconstruction.

OriginalspracheEnglisch
Seiten (von - bis)1416-1422
Seitenumfang7
FachzeitschriftBiophysical Journal
Jahrgang68
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - 1995
Extern publiziertJa

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