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Anatomy of herpes simplex virus DNA. XII. Accumulation of head-to-tail concatemers in nuclei of infected cells and their role in the generation of the four isomeric arrangements of viral DNA.

Abstract：

:Previous reports (H. Delius and J. B. Clements, J. Gen. Virol. 33:125-134, 1976; G. S. Hayward, R. J. Jacob, S. C. Wadsworth, and B. Roizman, Proc. Natl. Acad. Sci. U.S.A. 72:4243-4247, 1975; B. Roizman, G. S. Hayward, R. Jacob, S. W. Wadsworth, and R. W. Honess, Excerpta Med. Int. Congr. Ser. 2:188-198, 1974) have shown that herpes simplex virus DNA extracted from virions accumulating in the cytoplasm of infected cells consists of four populations of linear molecules differing in the orientation of the covalently linked large (L) and small (S) components relative to each other. Together, these four isomeric arrangements of viral DNA display four different termini and four different L-S component junctions. In the studies reported in this paper, we analyzed with restriction endonucleases the newly replicated viral DNA shortly after the onset of viral DNA synthesis, the progeny DNA accumulating in the nuclei late in infection, and rapidly sedimenting DNA present in nuclei of infected cells at 8 h after infection. In each instance the nuclear viral DNA contained a decreased concentration of all four terminal fragments and an increase in the concentration of fragments spanning the junction of L and S components relative to the concentration of other DNA fragments. The results are consistent with the hypothesis that the viral DNA accumulating in the nuclei consists of head-to-tail concatemers arising from the replication of DNA by a rolling-circle mechanism. A model is presented for generation of all four isomeric arrangements of herpes simplex virus DNA from one arrangement based on excision and repair of unit length DNA from head-to-tail concatemers and known features of the sequence arrangement of viral DNA.

journal_name

J Virol

journal_title

Journal of virology

authors

Jacob RJ,Morse LS,Roizman B

doi

10.1128/JVI.29.2.448-457.1979

subject

Has Abstract

pub_date

1979-02-01 00:00:00

pages

448-57

issue

eissn

0022-538X

issn

1098-5514

journal_volume

pub_type

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Anatomy of herpes simplex virus DNA. XII. Accumulation of head-to-tail concatemers in nuclei of infected cells and their role in the generation of the four isomeric arrangements of viral DNA.