HIFα Targeted for VHL-Mediated Destruction by Proline Hydroxylation: Implications for O2 Sensing

M Ivan, K Kondo, H Yang, W Kim, J Valiando, M Ohh… - Science, 2001 - science.org
M Ivan, K Kondo, H Yang, W Kim, J Valiando, M Ohh, A Salic, JM Asara, WS Lane
Science, 2001science.org
HIF (hypoxia-inducible factor) is a transcription factor that plays a pivotal role in cellular
adaptation to changes in oxygen availability. In the presence of oxygen, HIF is targeted for
destruction by an E3 ubiquitin ligase containing the von Hippel–Lindau tumor suppressor
protein (pVHL). We found that human pVHL binds to a short HIF-derived peptide when a
conserved proline residue at the core of this peptide is hydroxylated. Because proline
hydroxylation requires molecular oxygen and Fe2+, this protein modification may play a key …
HIF (hypoxia-inducible factor) is a transcription factor that plays a pivotal role in cellular adaptation to changes in oxygen availability. In the presence of oxygen, HIF is targeted for destruction by an E3 ubiquitin ligase containing the von Hippel–Lindau tumor suppressor protein (pVHL). We found that human pVHL binds to a short HIF-derived peptide when a conserved proline residue at the core of this peptide is hydroxylated. Because proline hydroxylation requires molecular oxygen and Fe2+, this protein modification may play a key role in mammalian oxygen sensing.
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