Activation of hypoxia-inducible factor-1; definition of regulatory domains within the alpha subunit.
Hypoxia-inducible factor-1 (HIF-1), a heterodimeric DNA binding complex composed of two basic-helix-loop-helix Per-AHR-ARNT-Sim proteins (HIF-1alpha and -1beta), is a key component of a widely operative transcriptional response activated by hypoxia, cobaltous ions, and iron chelation. To identify regions of HIF-1 subunits responsible for oxygen-regulated activity, we constructed chimeric genes in which portions of coding sequence from HIF-1 genes were either linked to a heterologous DNA bindi...Expand abstract
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