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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | White, S. B. Lee, F. S. Yu, F. Zhao, Q. |
| Description | Author Affiliation: Yu F ( Department of Pathology and Laboratory Medicine, University of Pennsylvania Cancer Center, University of Pennsylvania School of Medicine, Philadelphia 19104, USA.); |
| Abstract | Hypoxia-inducible factor-1alpha (HIF-1alpha) is a global transcriptional regulator of the hypoxic response. Under normoxic conditions, HIF-1alpha is recognized by the von Hippel-Lindau tumor-suppressor protein (VHL), a component of an E3 ubiquitin ligase complex. This interaction thereby promotes the rapid degradation of HIF-1alpha. Under hypoxic conditions, HIF-1alpha is stabilized. We have previously shown that VHL binds in a hypoxia-sensitive manner to a 27-aa segment of HIF-1alpha, and that this regulation depends on a posttranslational modification of HIF-1alpha. Through a combination of in vivo coimmunoprecipitation assays using VHL and a panel of point mutants of HIF-1alpha in this region, as well as MS and in vitro binding assays, we now provide evidence that this modification, which occurs under normoxic conditions, is hydroxylation of Pro-564 of HIF-1alpha. The data furthermore show that this proline hydroxylation is the primary regulator of VHL binding. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 17 |
| Volume Number | 98 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2001-08-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | DNA-Binding Proteins Metabolism Hydroxyproline Physiology Ligases Nuclear Proteins Protein Processing, Post-Translational Proteins Transcription Factors Tumor Suppressor Proteins Ubiquitin-Protein Ligases Amino Acid Sequence Animals COS Cells Cell Hypoxia Cercopithecus Aethiops Cobalt Pharmacology HeLa Cells Hydroxylation Chemistry Hypoxia-Inducible Factor 1 Hypoxia-Inducible Factor 1, Alpha Subunit Macromolecular Substances Molecular Sequence Data Peptide Fragments Point Mutation Proline Protein Binding Drug Effects Genetics Recombinant Fusion Proteins Transfection Von Hippel-Lindau Tumor Suppressor Protein Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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