Dynamics of the Hypoxia-inducible Factor-1-Vascular Endothelial Growth Factor Promoter Complex.

Dynamics of the Hypoxia-inducible Factor-1-Vascular Endothelial Growth Factor Promoter Complex. Research Abstract Details 

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Dynamics of the Hypoxia-inducible Factor-1-Vascular Endothelial Growth Factor Promoter Complex. Abstract Text:

Peng Yu,Thomas Kodadek,Peng Yu,Thomas Kodadek,Peng Yu,Thomas Kodadek,

Some transactivator-promoter complexes are highly dynamic due to active disruption of the complex by proteolytic or nonproteolytic mechanisms, and this appears to be an important mechanism by which their activity is governed tightly and eventually terminated. However, the generality of these mechanisms is unclear. In this report, we address the dynamics of hypoxia-inducible factor-1 (HIF-1) binding to the vascular endothelial growth factor promoter. HIF-1 is a heterodimeric transcription factor whose activity is triggered by an increase in HIF-1alpha levels in hypoxic cells. A "competition ChIP" assay is employed to demonstrate that HIF-1alpha forms a kinetically stable complex with the native vascular endothelial growth factor promoter that has a half-life in excess of 1 h. Thus, HIF-1 activity does not require rapid proteolytic turnover of the promoter-bound transactivator, nor is the activator-promoter complex constantly disassembled by chaperones. However, we do find that after cessation of the inducing signal, HIF-1 activity is slowly returned to basal levels by proteasome-mediated proteolysis of the promoter-bound HIF-1alpha protein.

Dynamics of the Hypoxia-inducible Factor-1-Vascular Endothelial Growth Factor Promoter Complex. Publishing Authors By Initials

P Yu,T Kodadek,P Yu,T Kodadek,P Yu,T Kodadek,

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Dynamics of the Hypoxia-inducible Factor-1-Vascular Endothelial Growth Factor Promoter Complex. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of biological chemistry

VOLUME: 282

Page Numbers: 35035-45

Journal Abbreviation: J. Biol. Chem.

ISSN: 0021-9258

DAY: 3

MONTH: 10

YEAR: 2007

Dynamics of the Hypoxia-inducible Factor-1-Vascular Endothelial Growth Factor Promoter Complex. Information

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LANGUAGE: eng

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AFFILIATION: Division of Translational Research, Departments of Internal Medicine and Molecular Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390-9185.

Country: United States

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MEDLINETA: J Biol Chem

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