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| Content Provider | PubMed Central |
|---|---|
| Author | Furukawa, K. Panté, N. Aebi, U. Gerace, L. |
| Abstract | Lamina-associated polypeptide 2 (LAP2) is an integral membrane protein of the inner nuclear membrane, which binds directly to both lamin B1 and chromosomes in a mitotic phosphorylation-regulated manner. The biochemical and physiological properties of LAP2 suggest an important role in nuclear envelope re-assembly at the end of mitosis and/or anchoring of the nuclear lamina and interphase chromosomes to the nuclear envelope. We describe the cDNA cloning of LAP2 and characterization of its membrane topology and targeting to the nuclear envelope. The LAP2 cDNA sequence predicts a protein of 452 amino acids, containing a large hydrophilic domain with several potential cdc2 kinase phosphorylation sites and a single putative membrane-spanning sequence at residues 410-433. Immunogold localization of an LAP2 epitope in isolated nuclear envelopes indicates that the large amino-terminal hydrophilic domain (residues 1-409) is exposed to the nucleoplasm. By expressing deletion mutants of LAP2 in cultured cells, we have identified multiple regions in its nucleoplasmic domain that promote localization at the nuclear envelope. These data suggest that targeting of LAP2 to the nuclear envelope is mediated by cooperative interactions with multiple binding sites at the inner nuclear membrane. |
| Starting Page | 1626 |
| File Format | |
| ISSN | 14602075 |
| e-ISSN | 14602075 |
| Journal | The EMBO Journal |
| Issue Number | 8 |
| Volume Number | 14 |
| Language | English |
| Publisher Date | 1995-04-18 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Molecular Biology |
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