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 hypoxiainducible 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.
Original language | English (US) |
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Pages (from-to) | 732-741 |
Number of pages | 10 |
Journal | Molecular and cellular biology |
Volume | 18 |
Issue number | 2 |
DOIs | |
State | Published - Feb 1998 |
Externally published | Yes |
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology