| http://purl.uniprot.org/citations/15475359 | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://purl.uniprot.org/core/Journal_Citation |
| http://purl.uniprot.org/citations/15475359 | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://purl.uniprot.org/core/Journal_Citation |
| http://purl.uniprot.org/citations/15475359 | http://www.w3.org/2000/01/rdf-schema#comment | "The transcriptional coactivator lens epithelium-derived growth factor (LEDGF)/p75 acts as a chromatin tethering factor for human immunodeficiency virus type 1 (HIV-1) integrase protein, determining its nuclear localization and its tight association with nuclear DNA. Here we identify a second function for the LEDGF/p75-integrase interaction. We observed that stable introduction of HIV-1 integrase (IN) transcription units into cells made stringently LEDGF/p75-deficient by RNAi resulted in much lower steady state levels of IN protein than introduction into LEDGF/p75 wild type cells. The same LEDGF/p75-dependent disparity was observed for feline immunodeficiency virus IN. However, IN mRNA levels were equivalent in the presence and absence of LEDGF/p75. A post-translational mechanism was confirmed when the half-life of HIV-1 IN protein was found to be much shorter in LEDGF/p75-deficient cells. Proteasome inhibition fully countered this extreme instability, increasing IN protein levels to those seen in LEDGF/p75 wild type cells and implicating proteasomal destruction as the main cause of IN instability. Consistent with these data, increased ubiquitinated HIV-1 IN was found in the LEDGF/p75 knock-down cells. Moreover, restoration of LEDGF/p75 to knocked down clones rescued HIV-1 IN stability. Subcellular fractionation showed that HIV-1 IN is exclusively cytoplasmic in LEDGF/p75-deficient cells, but mainly nuclear in LEDGF/p75 wild type cells, and that cytoplasmic HIV-1 IN has a shorter half-life than nuclear HIV-1 IN. However, using LEDGF proteins defective for nuclear localization and IN interaction, we further determined that protection of HIV-1 IN from the proteasome requires neither chromatin tethering nor nuclear residence. Protection requires only interaction with LEDGF/p75, and it is independent of the subcellular localization of the IN-LEDGF complex."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.org/dc/terms/identifier | "doi:10.1074/jbc.m408508200"xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.org/dc/terms/identifier | "doi:10.1074/jbc.m408508200"xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/author | "Vanegas M."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/author | "Vanegas M."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/author | "Delgado S."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/author | "Delgado S."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/author | "Llano M."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/author | "Llano M."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/author | "Poeschla E.M."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/author | "Poeschla E.M."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/date | "2004"xsd:gYear |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/date | "2004"xsd:gYear |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/name | "J. Biol. Chem."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/name | "J. Biol. Chem."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/pages | "55570-55577"xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/pages | "55570-55577"xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/title | "Lens epithelium-derived growth factor/p75 prevents proteasomal degradation of HIV-1 integrase."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/title | "Lens epithelium-derived growth factor/p75 prevents proteasomal degradation of HIV-1 integrase."xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/volume | "279"xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://purl.uniprot.org/core/volume | "279"xsd:string |
| http://purl.uniprot.org/citations/15475359 | http://www.w3.org/2004/02/skos/core#exactMatch | http://purl.uniprot.org/pubmed/15475359 |
| http://purl.uniprot.org/citations/15475359 | http://www.w3.org/2004/02/skos/core#exactMatch | http://purl.uniprot.org/pubmed/15475359 |