HIF-1 and mechanisms of hypoxia sensing.
Hypoxia-inducible factor 1 (HIF-1) is an oxygen-regulated transcriptional activator that plays essential roles in mammalian development, physiology and disease pathogenesis. The HIF-1 alpha subunit is subjected to oxygen-dependent ubiquitination and proteasomal degradation that is mediated by the von Hippel-Lindau protein. Interaction of HIF-1 alpha transactivation domains with coactivators is induced by hypoxia. The signal transduction pathway remains enigmatic, but involves generation of reactive oxygen species. Nitric oxide induces HIF-1 alpha under non-hypoxic conditions but inhibits hypoxia-induced HIF-1 alpha expression.[1]References
- HIF-1 and mechanisms of hypoxia sensing. Semenza, G.L. Curr. Opin. Cell Biol. (2001) [Pubmed]
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