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. 1979 Jun;76(6):2808–2812. doi: 10.1073/pnas.76.6.2808

Vp1 affects intracellular localization of Vp3 polypeptide during simian virus 40 infection.

H Kasamatsu, A Nehorayan
PMCID: PMC383698  PMID: 223160

Abstract

In order to understand the functions of simian virus 40 genes, permissive cells (TC7) were infected with mutants temperature sensitive in the complementation groups A, B, C, BC, and D at permissive and nonpermissive temperatures. Cells were examined for the localization of viral polypeptide antigens by immunofluorescent staining with monospecific antibodies. The results are as follows: (i) The appearance of Vp1 antigen in cells infected by tsB, C, or BC mutants was not affected appreciably by the mutations. (ii) The appearance of Vp3 antigen was affected by the mutations in B, C, or BC. Vp3 antigen is confined to the nuclei in cells infected by wild-type virus. With mutant virus infection, Vp3 antigen is found in the cytoplasm, perinuclear region, and nucleoli. (iii) The tsD mutants and the tsA mutants did not express either Vp1 or Vp3 antigens at the nonpermissive temperature. (iv) Nucleoli seem to play an essential role in the biosynthesis and assembly of viral polypeptides. Thus, mutations in any one of complementation groups B, C, or BC, which are within the structural gene for Vp1, cause an alteration of intracellular distribution of another late gene product, Vp3. These results suggest that the amino acid sequences of Vp1 polypeptide play a role(s) in the transport of viral antigens across internal membranes or in virus assembly processes or in both.

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These references are in PubMed. This may not be the complete list of references from this article.

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