Atomic force microscopy of RecA--DNA complexes using a carbon nanotube tip.

Abstract:

:We report high resolution images of RecA-double stranded (ds) DNA complexes obtained by atomic force microscopy (AFM). When a carbon nanotube (CNT) tip was used, AFM images visualized the 10-nm pitch of RecA-dsDNA complexes and RecA filaments as three-dimensional surface topography without reconstruction analysis. The depth of the notch between two pitches was less than 1 nm. When adsorbed on a soft surface covered with proteins, naked DNA, RecA monomers, RecA hexamers, and short RecA filaments were all clearly resolved in one image. The high resolution images with a CNT tip provided valuable information on the initiation process of RecA-dsDNA complex formation.

authors

Umemura K,Komatsu J,Uchihashi T,Choi N,Ikawa S,Nishinaka T,Shibata T,Nakayama Y,Katsura S,Mizuno A,Tokumoto H,Ishikawa M,Kuroda R

doi

10.1006/bbrc.2001.4333

subject

Has Abstract

pub_date

2001-02-23 00:00:00

pages

390-5

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(01)94333-5

journal_volume

281

pub_type

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