Direct visualization of polypeptide shell of ferritin molecule by atomic force microscopy

S. Ohnishi; M. H. Hara; Taiji Furuno; T. Okada; H. Sasabe

Direct visualization of polypeptide shell of ferritin molecule by atomic force microscopy

S. Ohnishi, M. H. Hara, Taiji Furuno, T. Okada, H. Sasabe

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Abstract

The polypeptide shell of the ferritin molecule has been imaged in water by atomic force microscopy (AFM). The central dip and the quaternary structure could be observed on the surface of the ferritin molecule anchored inhomogeneously in two dimensions. These structures observed in the AFM images are quite similar to the electron density map near the top of the apoferritin viewed down from a 4-fold axis structure reported previously (S. H. Banyard, D. K. Stammers, and P. M. Harrison. 1978. Nature (Lond.). 271:282-284). It has been achieved by introducing a 'self-screening effect' of the surface charges of the AFM sample (S. Ohnishi, M. Hara, T. Furuno, and H. Sasabe. 1992. Biophys. J. 63:1425-1431) and the specially sharpened stylus of AFM cantilever.

Original language	English
Pages (from-to)	573-577
Number of pages	5
Journal	Biophysical Journal
Volume	65
Issue number	2
Publication status	Published - 1993
Externally published	Yes

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Ohnishi, S., Hara, M. H., Furuno, T., Okada, T., & Sasabe, H. (1993). Direct visualization of polypeptide shell of ferritin molecule by atomic force microscopy. Biophysical Journal, 65(2), 573-577.

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abstract = "The polypeptide shell of the ferritin molecule has been imaged in water by atomic force microscopy (AFM). The central dip and the quaternary structure could be observed on the surface of the ferritin molecule anchored inhomogeneously in two dimensions. These structures observed in the AFM images are quite similar to the electron density map near the top of the apoferritin viewed down from a 4-fold axis structure reported previously (S. H. Banyard, D. K. Stammers, and P. M. Harrison. 1978. Nature (Lond.). 271:282-284). It has been achieved by introducing a 'self-screening effect' of the surface charges of the AFM sample (S. Ohnishi, M. Hara, T. Furuno, and H. Sasabe. 1992. Biophys. J. 63:1425-1431) and the specially sharpened stylus of AFM cantilever.",

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T1 - Direct visualization of polypeptide shell of ferritin molecule by atomic force microscopy

AU - Ohnishi, S.

AU - Hara, M. H.

AU - Furuno, Taiji

AU - Okada, T.

AU - Sasabe, H.

PY - 1993

Y1 - 1993

N2 - The polypeptide shell of the ferritin molecule has been imaged in water by atomic force microscopy (AFM). The central dip and the quaternary structure could be observed on the surface of the ferritin molecule anchored inhomogeneously in two dimensions. These structures observed in the AFM images are quite similar to the electron density map near the top of the apoferritin viewed down from a 4-fold axis structure reported previously (S. H. Banyard, D. K. Stammers, and P. M. Harrison. 1978. Nature (Lond.). 271:282-284). It has been achieved by introducing a 'self-screening effect' of the surface charges of the AFM sample (S. Ohnishi, M. Hara, T. Furuno, and H. Sasabe. 1992. Biophys. J. 63:1425-1431) and the specially sharpened stylus of AFM cantilever.

AB - The polypeptide shell of the ferritin molecule has been imaged in water by atomic force microscopy (AFM). The central dip and the quaternary structure could be observed on the surface of the ferritin molecule anchored inhomogeneously in two dimensions. These structures observed in the AFM images are quite similar to the electron density map near the top of the apoferritin viewed down from a 4-fold axis structure reported previously (S. H. Banyard, D. K. Stammers, and P. M. Harrison. 1978. Nature (Lond.). 271:282-284). It has been achieved by introducing a 'self-screening effect' of the surface charges of the AFM sample (S. Ohnishi, M. Hara, T. Furuno, and H. Sasabe. 1992. Biophys. J. 63:1425-1431) and the specially sharpened stylus of AFM cantilever.

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Direct visualization of polypeptide shell of ferritin molecule by atomic force microscopy

Abstract

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