Uncoating of adenovirus type 2.

Abstract:

:The uncoating of adenovirus type 2 and a temperature-sensitive mutant, tsl, was studied. HEp-2 cells were infected with 32P- OR 125I-labeled purified virions for various lengths of time, and the nuclear and cytoplasmic fractions were analyzed by sucrose gradient velocity sedimentation and sodium dodecyl sulfate-polyacryl-amide gel electrophoresis. Within 1 h of infection, virions were converted into three subviral structures: (1) subviral structures in the cytoplasm with a density greater than virions but which qualitatively still contained all virus polypeptides; (ii) corelike structures associated with both the nuclear and cytoplasmic fractions and composed of viral DNA and polypeptides VIa2, V and PVII; and (iii) putative DNA-terminal protein complexes in the nuclei. The kinetic and compartmentalization studies suggested that the DNA-terminal protein complex is the end product of uncoating. The virions which were synthesized by tsl at the nonpermissive temperature and contained the precursor polypeptides PVI and PVII were found to be blocked in uncoating at the corelike stage. This block in uncoating provides the explanation for the lack of infectivity of these virions. A model for the uncoating of adenovirus is proposed.

journal_name

J Virol

journal_title

Journal of virology

authors

Mirza MA,Weber J

doi

10.1128/JVI.30.2.462-471.1979

subject

Has Abstract

pub_date

1979-05-01 00:00:00

pages

462-71

issue

2

eissn

0022-538X

issn

1098-5514

journal_volume

30

pub_type

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