Structure and formation of circular dimers of simian virus 40 DNA.

Abstract:

:Most of the viral DNA extracted from simian virus 40 (SV40)-infected African green monkey kidney cells consists of circular molecules about 5.3 kilobases in contour length. However, about 1% of the viral DNA was found to occur as closed circular dimers that appeared to be formed, preferentially, late in infection. The monomeric units of dimers were organized in a head-to-tail, tandem arrangement; moreover, the monomeric units were not defective; i.e., they lacked deletions or other rearrangements. After infections with dimer DNA, nondefective monomers were formed. These findings suggest that dimers are not intermediates in the production of defective SV40 genomes. The majority of the dimers formed in mixed infections with two mutants were homodimers, but about 5% of the circular dimers were heterodimers and must have arisen by intermolecular recombination.

journal_name

J Virol

journal_title

Journal of virology

authors

Goff SP,Berg P

doi

10.1128/JVI.24.1.295-302.1977

subject

Has Abstract

pub_date

1977-10-01 00:00:00

pages

295-302

issue

1

eissn

0022-538X

issn

1098-5514

journal_volume

24

pub_type

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