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Cited by 285

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Evidence for the Presence of a Guanine Quadruplex Forming Region within a Polypurine Tract of the Hypoxia Inducible Factor 1α Promoter

De Armond, Richard, Wood, Stacey, Sun, Daekyu, Hurley, Laurence H., Ebbinghaus, Scot W.·2005·Biochemistry

Abstract

The promoter of the hypoxia inducible factor 1 alpha (HIF-1alpha) gene has a polypurine/polypyrimidine tract (-65 to -85) overlapping or adjacent to several putative transcription factor binding sites, and we found that mutagenesis of this region diminished basal HIF-1alpha expression. Oligonucleotides representing this region of the HIF-1alpha promoter were analyzed by electrophoretic mobility shift, chemical probing, circular dichroism, and DNA polymerase arrest assays. The guanine-rich strand was found to form a parallel, unimolecular quadruplex in the presence of potassium that was further stabilized by two known quadruplex binding compounds, the cationic porphyrin TmPyP4 and the natural product telomestatin, while TmPyP2, a positional isomer of TmPyP4, did not stabilize quadruplex formation. These data suggest that a quadruplex structure may form in a region of the HIF-1alpha promoter that regulates basal HIF-1alpha expression.

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Metadata

Authors
De Armond, R., Wood, S., Sun, D., Hurley, L. H., & Ebbinghaus, S. W.
Venue
Biochemistry
Published
2005-11-12
Volume
44
Issue
49
Pages
16341-16350
ISSN
  • 0006-2960 (ISSN-L)
  • 1520-4995
OpenAlex
W2052024409
Cited by
285
References
2
FWCI
5.88
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Evidence for the Presence of a Guanine Quadruplex Forming Region within a Polypurine Tract of the Hypoxia Inducible Factor 1α Promoter. https://app.cochat.ai/papers/10.1021/bi051618u
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De Armond, R., Wood, S., Sun, D., Hurley, L. H., & Ebbinghaus, S. W. (2005). Evidence for the Presence of a Guanine Quadruplex Forming Region within a Polypurine Tract of the Hypoxia Inducible Factor 1α Promoter. Biochemistry. https://doi.org/10.1021/bi051618u

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