| pubmed-article:9565570 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:9565570 | lifeskim:mentions | umls-concept:C0206131 | lld:lifeskim |
| pubmed-article:9565570 | lifeskim:mentions | umls-concept:C0021641 | lld:lifeskim |
| pubmed-article:9565570 | lifeskim:mentions | umls-concept:C0034818 | lld:lifeskim |
| pubmed-article:9565570 | lifeskim:mentions | umls-concept:C0037083 | lld:lifeskim |
| pubmed-article:9565570 | lifeskim:mentions | umls-concept:C1710082 | lld:lifeskim |
| pubmed-article:9565570 | lifeskim:mentions | umls-concept:C0443199 | lld:lifeskim |
| pubmed-article:9565570 | lifeskim:mentions | umls-concept:C0599896 | lld:lifeskim |
| pubmed-article:9565570 | lifeskim:mentions | umls-concept:C1710236 | lld:lifeskim |
| pubmed-article:9565570 | pubmed:issue | 19 | lld:pubmed |
| pubmed-article:9565570 | pubmed:dateCreated | 1998-6-5 | lld:pubmed |
| pubmed-article:9565570 | pubmed:abstractText | The ability of the insulin receptor to phosphorylate multiple substrates and their subcellular localization are two of the determinants that contribute to diversity of signaling. We find that insulin receptor substrate (IRS)-1 is 2-fold more concentrated in the intracellular membrane (IM) compartment than in cytosol, whereas IRS-2 is 2-fold more concentrated in cytosol than in IM. Insulin stimulation induces rapid tyrosine phosphorylation of both IRS-1 and IRS-2. This occurs mainly in the IM compartment, even though IRS-2 is located predominantly in cytosol. Furthermore, after insulin stimulation, both IRS-1 and IRS-2 translocate from IM to cytosol with a t1/2 of 3.5 min. Using an in vitro reconstitution assay, we have demonstrated an association between IRS-1 and internal membranes and have shown that the dissociation of IRS-1 from IM is dependent on serine/threonine phosphorylation of IM. By comparison, within 1 min after insulin stimulation, 40% of the total pool of the 85-kDa subunit of phosphatidylinositol 3-kinase (p85) is recruited from cytosol to IM, the greater part of which can be accounted for by binding to IRS-1 present in the IM. The p85 binding and phosphatidylinositol 3-kinase activity associated with IRS-2 rapidly decrease in both IM and cytosol, whereas those associated with IRS-1 stay at a relatively high level in IM and increase with time in cytosol despite a return of p85 to the cytosol and decreasing tyrosine phosphorylation of cytosolic IRS-1. These data indicate that IRS-1 and IRS-2 are differentially distributed in the cell and move from IM to cytosol following insulin stimulation. Insulin-stimulated IRS-1 and IRS-2 signaling occurs mainly in the IM and shows different kinetics; IRS-1-mediated signaling is more stable, whereas IRS-2-mediated signaling is more transient. These differences in substrate utilization and compartmentalization may contribute to the complexity and diversity of the insulin signaling network. | lld:pubmed |
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| pubmed-article:9565570 | pubmed:language | eng | lld:pubmed |
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| pubmed-article:9565570 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:9565570 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:9565570 | pubmed:month | May | lld:pubmed |
| pubmed-article:9565570 | pubmed:issn | 0021-9258 | lld:pubmed |
| pubmed-article:9565570 | pubmed:author | pubmed-author:KahnC RCR | lld:pubmed |
| pubmed-article:9565570 | pubmed:author | pubmed-author:InoueGG | lld:pubmed |
| pubmed-article:9565570 | pubmed:author | pubmed-author:CheathamBB | lld:pubmed |
| pubmed-article:9565570 | pubmed:author | pubmed-author:EmkeyRR | lld:pubmed |
| pubmed-article:9565570 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:9565570 | pubmed:day | 8 | lld:pubmed |
| pubmed-article:9565570 | pubmed:volume | 273 | lld:pubmed |
| pubmed-article:9565570 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:9565570 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:9565570 | pubmed:pagination | 11548-55 | lld:pubmed |
| pubmed-article:9565570 | pubmed:dateRevised | 2011-11-17 | lld:pubmed |
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| pubmed-article:9565570 | pubmed:year | 1998 | lld:pubmed |
| pubmed-article:9565570 | pubmed:articleTitle | Dynamics of insulin signaling in 3T3-L1 adipocytes. Differential compartmentalization and trafficking of insulin receptor substrate (IRS)-1 and IRS-2. | lld:pubmed |
| pubmed-article:9565570 | pubmed:affiliation | Research Division, Joslin Diabetes Center and Department of Medicine, Harvard Medical School, Boston, Massachusetts 02215, USA. | lld:pubmed |
| pubmed-article:9565570 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:9565570 | pubmed:publicationType | Research Support, U.S. Gov't, P.H.S. | lld:pubmed |
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