Abstract:
:Treatment of polyoma virions with ethyleneglycol-bil-N,N'-tetraacetic acid (EGTA) and dithiothreitol (DTT) at pH 8.5 resulted in the dissociation of the virions into a DNA-protein complex and individual structural capsomere subunits. The sedimentation value of the DNA-protein complex in sucrose gradients was approximately 48S, and it had a density of 1.45 g/cm3 in equilibrium CsCl gradients. Alkaline sucrose analysis of the DNA within this DNA-protein complex demonstrated that approximately 75% of the DNA is component 1. The proteins associated with the DNA were dissociated by treatment with either NaCl or the anionic detergent Sarkosyl. VP1 and the histone proteins VP 4--7 were the major proteins associated with the DNA. Treatment of the DNA-protein complex with alkaline pH resulted in the specific removal of FP1. Electron microscopy of the 48S DNA-protein complex demonstrated that it is a very tightly coiled structure that is slightly larger than the intact virion. Treatment of the complex with either NaCl or with pH 10.5 buffer resulted in the loss of protein and subsequent loosening of the DNA-protein complex such that the DNA could be visualized. The capsomere subunits released as a result of the EGTA-DTT treatment sedimented as 18S, 12S, and 5S subunits in sucrose gradients. Electrophoretic analysis of the isolated capsomeres demonstrated that VP1, VP2, and VP3 were present in each species, although the ratios of the proteins varied. In addition to the structural proteins, histones VP 4--7 were found to be predominantly associated with the 5S capsomere subunit.
journal_name
J Viroljournal_title
Journal of virologyauthors
Brady JN,Winston VD,Consigli RAdoi
10.1128/JVI.27.1.193-204.1978subject
Has Abstractpub_date
1978-07-01 00:00:00pages
193-204issue
1eissn
0022-538Xissn
1098-5514journal_volume
27pub_type
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.8.6721-6728.1999
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doi:10.1128/JVI.15.4.776-784.1975
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pub_type: 杂志文章
doi:10.1128/JVI.61.4.1067-1072.1987
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.64.12.6070-6079.1990
更新日期:1990-12-01 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.71.12.9400-9409.1997
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pub_type: 杂志文章
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更新日期:2005-04-01 00:00:00
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pub_type: 杂志文章
doi:10.1128/JVI.00812-18
更新日期:2018-07-31 00:00:00
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pub_type: 杂志文章
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更新日期:2018-09-12 00:00:00
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pub_type: 杂志文章
doi:10.1128/JVI.54.1.186-193.1985
更新日期:1985-04-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01576-15
更新日期:2015-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1128/JVI.66.4.2031-2036.1992
更新日期:1992-04-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.3.1941-1952.1996
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.67.10.5962-5967.1993
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pub_type: 杂志文章
doi:10.1128/JVI.65.11.5806-5812.1991
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.14.5.1262-1267.1974
更新日期:1974-11-01 00:00:00
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pub_type: 杂志文章
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更新日期:2015-12-30 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.4.2101-2106.1996
更新日期:1996-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:1987-11-01 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.74.22.10752-10765.2000
更新日期:2000-11-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2016-12-16 00:00:00
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pub_type: 杂志文章
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更新日期:2012-07-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.6.6.760-767.1970
更新日期:1970-12-01 00:00:00