| pubmed-article:18299322 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C0007609 | lld:lifeskim |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C0441655 | lld:lifeskim |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C0542341 | lld:lifeskim |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C0069139 | lld:lifeskim |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C1428114 | lld:lifeskim |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C2587213 | lld:lifeskim |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C0752169 | lld:lifeskim |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C0851285 | lld:lifeskim |
| pubmed-article:18299322 | lifeskim:mentions | umls-concept:C0015272 | lld:lifeskim |
| pubmed-article:18299322 | pubmed:issue | 17 | lld:pubmed |
| pubmed-article:18299322 | pubmed:dateCreated | 2008-4-21 | lld:pubmed |
| pubmed-article:18299322 | pubmed:abstractText | We demonstrate that physiologically relevant perturbations in the osmotic environment rheostatically regulate a gatekeeping function for the nucleolus that controls the spatial dynamics and functions of nucleolin. HeLa cells and U2-OS osteosarcoma cells were osmotically challenged with 100-200 mm sorbitol, and the intranuclear distribution of nucleolin was monitored by confocal microscopy. Nucleolin that normally resides in the innermost fibrillar core of the nucleolus, where it assists rDNA transcription and replication, was expelled within 30 min of sorbitol addition. The nucleolin was transferred into the nucleoplasm, but it distributed there non-uniformly; locally high levels accumulated in 4',6-diamidino-2-phenylindole-negative zones containing euchromatic (transcriptionally active) DNA. Inositol pyrophosphates also responded within 30 min of hyperosmotic stress: levels of bisdiphosphoinositol tetrakisphosphate increased 6-fold, and this was matched by decreased levels of its precursor, diphosphoinositol pentakisphosphate. Such fluctuations in inositol pyrophosphate levels are of considerable interest, because, according to previously published in vitro data, they regulate the degree of phosphorylation of nucleolin through a novel kinase-independent phosphotransferase reaction ( Saiardi, A., Bhandari, A., Resnick, R., Cain, A., Snowman, A. M., and Snyder, S. H. (2004) Science 306, 2101-2105 ). However, by pharmacologically intervening in inositol pyrophosphate metabolism, we found that it did not supervise the osmotically driven switch in the biological activities of nucleolin in vivo. | lld:pubmed |
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| pubmed-article:18299322 | pubmed:language | eng | lld:pubmed |
| pubmed-article:18299322 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18299322 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:18299322 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:18299322 | pubmed:month | Apr | lld:pubmed |
| pubmed-article:18299322 | pubmed:issn | 0021-9258 | lld:pubmed |
| pubmed-article:18299322 | pubmed:author | pubmed-author:BortnerCarl... | lld:pubmed |
| pubmed-article:18299322 | pubmed:author | pubmed-author:ShearsStephen... | lld:pubmed |
| pubmed-article:18299322 | pubmed:author | pubmed-author:YangLingL | lld:pubmed |
| pubmed-article:18299322 | pubmed:author | pubmed-author:ChoJaiesoonJ | lld:pubmed |
| pubmed-article:18299322 | pubmed:author | pubmed-author:ReeceJeff MJM | lld:pubmed |
| pubmed-article:18299322 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:18299322 | pubmed:day | 25 | lld:pubmed |
| pubmed-article:18299322 | pubmed:volume | 283 | lld:pubmed |
| pubmed-article:18299322 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:18299322 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:18299322 | pubmed:pagination | 11823-31 | lld:pubmed |
| pubmed-article:18299322 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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