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| Content Provider | PubMed Central |
|---|---|
| Author | Zupan, J. R. Zambryski, P. Citovsky, V. |
| Abstract | Agrobacterium genetically transforms plant cells by transferring a single-stranded DNA (ssDNA) copy of the transferred DNA (T-DNA) element, the T-strand, in a complex with Agrobacterium proteins VirD2, bound to the 5' end, and VirE2. VirE2 binds single-stranded nucleic acid cooperatively, fully coating the T-strand, and the protein localizes to the plant cell nucleus when transiently expressed. The coupling of ssDNA binding and nuclear localizing activities suggests that VirE2 alone could mediate nuclear localization of ssDNA. In this study, fluorescently labeled ssDNA accumulated in the plant cell nucleus specifically when microinjected as a complex with VirE2. Microinjected ssDNA alone remained cytoplasmic. Import of VirE2-ssDNA complex into the nucleus via a protein import pathway was supported by (i) the inhibition of VirE2-ssDNA complex import in the presence of wheat germ agglutinin or a nonhydrolyzable GTP analog, both known inhibitors of protein nuclear import, and (ii) the retardation of import when complexes were prepared from a VirE2 mutant impaired in ssDNA binding and nuclear import. |
| Starting Page | 2392 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 6 |
| Volume Number | 93 |
| Language | English |
| Publisher Date | 1996-03-19 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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