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Type: Journal article
Title: Asparagine hydroxylation of the HIF transactivation domain: A hypoxic switch
Author: Lando, D.
Peet, D.
Whelan, D.
Gorman, J.
Whitelaw, M.
Citation: Science, 2002; 295(5556):858-861
Publisher: Amer Assoc Advancement Science
Issue Date: 2002
ISSN: 0036-8075
Organisation: Centre for the Molecular Genetics of Development
Statement of
David Lando, Daniel J. Peet, Dean A. Whelan, Jeffrey J. Gorman and Murray L. Whitelaw
Abstract: The hypoxia-inducible factors (HIFs) 1α and 2α are key mammalian transcription factors that exhibit dramatic increases in both protein stability and intrinsic transcriptional potency during low-oxygen stress. This increased stability is due to the absence of proline hydroxylation, which in normoxia promotes binding of HIF to the von Hippel-Lindau (VHL tumor suppressor) ubiquitin ligase. We now show that hypoxic induction of the COOH-terminal transactivation domain (CAD) of HIF occurs through abrogation of hydroxylation of a conserved asparagine in the CAD. Inhibitors of Fe(II)- and 2-oxoglutarate-dependent dioxygenases prevented hydroxylation of the Asn, thus allowing the CAD to interact with the p300 transcription coactivator. Replacement of the conserved Asn by Ala resulted in constitutive p300 interaction and strong transcriptional activity. Full induction of HIF-1α and -2α, therefore, relies on the abrogation of both Pro and Asn hydroxylation, which during normoxia occur at the degradation and COOH-terminal transactivation domains, respectively.
Keywords: Cell Line
Mixed Function Oxygenases
Recombinant Fusion Proteins
Transcription Factors
Amino Acid Substitution
Cell Hypoxia
Amino Acid Sequence
Protein Structure, Tertiary
Molecular Sequence Data
Basic Helix-Loop-Helix Transcription Factors
Hypoxia-Inducible Factor 1, alpha Subunit
Mass Spectrometry
Transcriptional Activation
DOI: 10.1126/science.1068592
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Appears in Collections:Aurora harvest 6
Centre for the Molecular Genetics of Development publications
Molecular and Biomedical Science publications

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