Abstract:
:The cytoplasmic assembly of vaccinia virus is reversibly blocked by the antibiotic rifampin, leading to the accumulation of partially membrane-delineated rifampin bodies in infected cells. Rifampin-resistant vaccinia virus mutants have point mutations in the D13L gene, which is controlled by a late promoter and expresses a 65-kDa protein, designated p65. To further characterize the mechanism of rifampin inhibition and the function of p65 in virus assembly, we raised antibodies to this protein. Immunoreactive p65 was expressed at late times of infection, and neither its expression nor its turnover was affected by rifampin. Virus-associated p65 could be extracted only with denaturing detergents from purified virions, suggesting that it is an integral viral component. Immunofluorescence studies showed that p65 is localized to the sites of virus assembly. Also, immunoelectron microscopy showed p65 to be associated with viral crescents as well as spherical, immature virions, in both cases predominantly on the inner or concave surface. In the presence of rifampin, p65 was found in large, cytoplasmic inclusion bodies that were distinct from rifampin bodies. The rifampin bodies themselves were labeled with p65 antibodies only after reversal of the rifampin block, predominantly on the viral crescents which rapidly formed following removal of the drug. We propose that p65 functions as an internal scaffold in the formation of viral crescents and immature virions, analogously to the matrix proteins of other viruses.
journal_name
J Viroljournal_title
Journal of virologyauthors
Sodeik B,Griffiths G,Ericsson M,Moss B,Doms RWdoi
10.1128/JVI.68.2.1103-1114.1994subject
Has Abstractpub_date
1994-02-01 00:00:00pages
1103-14issue
2eissn
0022-538Xissn
1098-5514journal_volume
68pub_type
杂志文章abstract::We have constructed new murine leukemia virus (MLV)-based vectors (TIN vectors) which, following integration, contain human immunodeficiency virus (HIV) type 1 U3 and R sequences in place of the MLV U3 and R regions. This provides, for the first time, single transcriptional unit retroviral vectors under the control of...
journal_title:Journal of virology
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journal_title:Journal of virology
pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1128/JVI.12.6.1503-1511.1973
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doi:10.1128/JVI.62.7.2265-2273.1988
更新日期:1988-07-01 00:00:00
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更新日期:2008-01-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.6.3740-3748.1992
更新日期:1992-06-01 00:00:00
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更新日期:2019-07-17 00:00:00
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更新日期:1990-02-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2012-11-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1128/JVI.39.1.60-66.1981
更新日期:1981-07-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2011-08-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.6.6.738-749.1970
更新日期:1970-12-01 00:00:00