A nuclear factor that binds purine-rich, single-stranded oligonucleotides derived from S1-sensitive elements upstream of the CFTR gene and the MUC1 gene

Michael A Hollingsworth, Christina Closken, Ann Harris, Claudia D. McDonald, Gurcharan S. Pahwa, L. James Maher

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We have identified two regions of non-random purine/pyrimldine strand asymmetry that were nearly identical in sequence in the 5′ flanking (promoter) regions of the human cystic fibrosis transmembrane conductance regulator (CFTR) gene and the human MUC1 gene. These regions contain perfect mirror repeat elements, a sequence motif previously found to be associated with the formation of H-DNA conformations. In this report we demonstrate that a single-stranded non-B DNA conformation exists at low pH in supercoiled plasmids containing the similar mirror repeat elements, and that S1 nuclease digestion maps the single-stranded region to the position of the mirror repeats. In addition, we identify a nuclear protein of approximately 27 kD that binds to single-stranded oligonucleotides corresponding to the purtne-rlch strand of this region, but not to the pyrlmldlne-rlch strands or to double-stranded oligonucleotides with corresponding purine/pyrimidlne strand asymmetry.

Original languageEnglish (US)
Pages (from-to)1138-1146
Number of pages9
JournalNucleic acids research
Volume22
Issue number7
DOIs
StatePublished - Apr 11 1994

Fingerprint

Nucleic Acid Conformation
Fibrosis
Cystic Fibrosis Transmembrane Conductance Regulator
Oligonucleotides
Regulator Genes
Conductance
Regulator
Mirrors
Genes
Gene
Conformations
5' Flanking Region
DNA
Nuclear Proteins
Mirror
Genetic Promoter Regions
Digestion
Plasmids
Conformation
Asymmetry

ASJC Scopus subject areas

  • Statistics, Probability and Uncertainty
  • Applied Mathematics
  • Health, Toxicology and Mutagenesis
  • Toxicology
  • Genetics(clinical)
  • Genetics

Cite this

A nuclear factor that binds purine-rich, single-stranded oligonucleotides derived from S1-sensitive elements upstream of the CFTR gene and the MUC1 gene. / Hollingsworth, Michael A; Closken, Christina; Harris, Ann; McDonald, Claudia D.; Pahwa, Gurcharan S.; Maher, L. James.

In: Nucleic acids research, Vol. 22, No. 7, 11.04.1994, p. 1138-1146.

Research output: Contribution to journalArticle

Hollingsworth, Michael A ; Closken, Christina ; Harris, Ann ; McDonald, Claudia D. ; Pahwa, Gurcharan S. ; Maher, L. James. / A nuclear factor that binds purine-rich, single-stranded oligonucleotides derived from S1-sensitive elements upstream of the CFTR gene and the MUC1 gene. In: Nucleic acids research. 1994 ; Vol. 22, No. 7. pp. 1138-1146.
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AB - We have identified two regions of non-random purine/pyrimldine strand asymmetry that were nearly identical in sequence in the 5′ flanking (promoter) regions of the human cystic fibrosis transmembrane conductance regulator (CFTR) gene and the human MUC1 gene. These regions contain perfect mirror repeat elements, a sequence motif previously found to be associated with the formation of H-DNA conformations. In this report we demonstrate that a single-stranded non-B DNA conformation exists at low pH in supercoiled plasmids containing the similar mirror repeat elements, and that S1 nuclease digestion maps the single-stranded region to the position of the mirror repeats. In addition, we identify a nuclear protein of approximately 27 kD that binds to single-stranded oligonucleotides corresponding to the purtne-rlch strand of this region, but not to the pyrlmldlne-rlch strands or to double-stranded oligonucleotides with corresponding purine/pyrimidlne strand asymmetry.

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