| Literature DB >> 9447969 |
K M Lonergan1, O Iliopoulos, M Ohh, T Kamura, R C Conaway, J W Conaway, W G Kaelin.
Abstract
The von Hippel-Lindau tumor suppressor protein (pVHL) binds to elongins B and C and posttranscriptionally regulates the accumulation of hypoxia-inducible mRNAs under normoxic (21% O2) conditions. Here we report that pVHL binds, via elongin C, to the human homolog of the Caenorhabditis elegans Cul2 protein. Coimmunoprecipitation and chromatographic copurification data suggest that pVHL-Cul2 complexes exist in native cells. pVHL mutants that were unable to bind to complexes containing elongin C and Cul2 were likewise unable to inhibit the accumulation of hypoxia-inducible mRNAs. A model for the regulation of hypoxia-inducible mRNAs by pVHL is presented based on the apparent similarity of elongin C and Cul2 to Skp1 and Cdc53, respectively. These latter proteins form complexes that target specific proteins for ubiquitin-dependent proteolysis.Entities:
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Year: 1998 PMID: 9447969 PMCID: PMC108784 DOI: 10.1128/MCB.18.2.732
Source DB: PubMed Journal: Mol Cell Biol ISSN: 0270-7306 Impact factor: 4.272