Abstract:
:We compared the proteins which associate with middle T antigen (MT) of polyomavirus in human cells infected with Ad5(pymT), a recombinant adenovirus which directs the overexpression of MT, with the MT-associated proteins (MTAPs) previously identified in murine fibroblasts expressing MT. MTAPs of 27, 29, 36, and 63 kilodaltons (kDa) appeared to be fairly well conserved between the two species, as judged by comigration on two-dimensional gels. Several 61-kDa MTAP species detected in MT immunoprecipitates from both cell sources also comigrated on these gels. However, no protein comigrating precisely with the murine 85-kDa MTAP could be detected in the human cells. Furthermore, two proteins of 72 and 74 kDa associated with wild-type MT in the infected human cells but not in murine fibroblasts expressing MT. It had been previously reported for murine cells that the 70-kDa heat shock protein associates with a particular mutant MT but not with wild-type MT (G. Walter, A. Carbone, and W.J. Welch, J. Virol. 61:405-410, 1987). By the criteria of comigration on two-dimensional gels, tryptic peptide mapping, and immunoblotting, we showed that the 72- and 74-kDa proteins that associate with wild-type MT in human cells are the major human 70-kDa heat shock proteins.
journal_name
J Viroljournal_title
Journal of virologyauthors
Pallas DC,Morgan W,Roberts TMdoi
10.1128/JVI.63.11.4533-4539.1989subject
Has Abstractpub_date
1989-11-01 00:00:00pages
4533-9issue
11eissn
0022-538Xissn
1098-5514journal_volume
63pub_type
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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
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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
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