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Xenopus transcription factor-IIIA forms a complex of covalent character with 5S DNA

Academic Article
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Overview

authors

  • Blanco, J.
  • Gottesfeld, Joel

publication date

  • December 1988

journal

  • Nucleic Acids Research  Journal

abstract

  • The 5S gene-specific transcription factor TFIIIA forms an exceptionally stable complex with the internal promoter of the 5S RNA gene. Approximately 1 to 5% of TFIIIA-DNA or deoxyoligonucleotide complexes are stable to harsh denaturation conditions and can be resolved by electrophoresis in the presence of SDS. These complexes are resistant to acidic conditions (0.1 N HCl, 55 degrees C, 2h) suggesting that the interaction may be through a covalent bond. Complex formation does not result in DNA strand scission and studies of the chemical sensitivity of the complex suggest that the TFIIIA-DNA linkage may be through a phosphoramidate bond. Covalent complexes are formed with both the noncoding (RNA-like) and coding strands of the internal control region. The predominant sites of TFIIIA-DNA adducts have been mapped to the 3' end of the 5S gene internal control region, the region previously shown to exhibit essential guanine and phosphate contacts with TFIIIA.

subject areas

  • Animals
  • DNA-Binding Proteins
  • Gene Conversion
  • Macromolecular Substances
  • Nucleic Acid Denaturation
  • Oligonucleotide Probes
  • Promoter Regions, Genetic
  • RNA, Ribosomal
  • RNA, Ribosomal, 5S
  • Sodium Dodecyl Sulfate
  • Transcription Factor TFIIIA
  • Transcription Factors
  • Xenopus laevis
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Identity

International Standard Serial Number (ISSN)

  • 0305-1048

Digital Object Identifier (DOI)

  • 10.1093/nar/16.23.11267

PubMed ID

  • 3205743
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Additional Document Info

start page

  • 11267

end page

  • 11284

volume

  • 16

issue

  • 23

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