Abstract:
:To identify the protein encoded by the L7 region of bovine adenovirus-3 (BAdV-3), specific antisera were raised by immunizing rabbits with bacterial fusion proteins encoding the N-terminus or C-terminus of the BAdV-3 fiber protein. Immunoprecipitation and Western blot analysis confirmed that the fiber is expressed as a 102 kDa glycoprotein, which is localized to the nucleus of infected cells. To identify the nuclear localization signals (NLS), BAdV-3 fiber deletion mutants and GFP/beta-galactosidase fusion proteins were expressed in transfected cells, and subcellular localization was visualized by immunofluorescence microscopy. Analysis of deletion mutants localized the NLS to the N-terminal 41 amino acids. Analysis of the N-terminal 41 amino acids identified a cluster of basic residues between amino acid 14 and 20. Substitution of the basic residues (16KAKR19) with acidic residues (16EAEE19) resulted in the accumulation of fiber in the cytoplasm. However, 16KAKR19 or 12VYPYKAKRPNI22 were not sufficient for efficient transport of a cytoplasmic protein GFP/beta-galactosidase to the nucleus. The recombinant BAdV-3 expressing mutant fiber containing 16EAEE19 instead of 16KAKR19 was unable to replicate efficiently in Madin-Darby bovine kidney cells, suggesting that the NLS of fiber carries out important in vivo functions.
journal_name
Arch Viroljournal_title
Archives of virologyauthors
Wu Q,Chen Y,Kulshreshtha V,Tikoo SKdoi
10.1007/s00705-004-0323-xkeywords:
subject
Has Abstractpub_date
2004-09-01 00:00:00pages
1783-99issue
9eissn
0304-8608issn
1432-8798journal_volume
149pub_type
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journal_title:Archives of virology
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pub_type: 杂志文章
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journal_title:Archives of virology
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doi:10.1007/BF01320600
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更新日期:2017-08-01 00:00:00
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