Binding of the ubiquitous nuclear transcription factor YY1 to a cis regulatory sequence in the human LINE-1 transposable element

Hum Mol Genet. 1993 Oct;2(10):1697-702. doi: 10.1093/hmg/2.10.1697.

Abstract

The first step of the currently favored model for the mechanism of transposition of the human LINE-1 element involves the synthesis of full length LINE-1 mRNA. Previous work demonstrated that the 5'-terminal 100 base pairs of the human LINE-1 element (L1Hs) has an important role in regulating it's expression. Here we report further deletion analysis revealing the presence of a cis regulatory element overlapping the region between base pairs +12 and +18. Oligonucleotides containing this sequence form a specific complex with a nuclear protein extracted from NTera2D1 and Jurkat cells, and with recombinant YY1 produced in E. coli. The complex is competed by YY1 binding sites found in other genes, and is ablated by anti-YY1 serum. These results suggest that YY1 is involved in the regulation of L1Hs transcription and therefore transposition.

MeSH terms

  • Base Sequence
  • DNA / metabolism*
  • DNA Transposable Elements / genetics*
  • DNA-Binding Proteins / metabolism*
  • Erythroid-Specific DNA-Binding Factors
  • Gene Expression Regulation
  • Humans
  • Models, Genetic
  • Molecular Sequence Data
  • Promoter Regions, Genetic
  • Protein Binding
  • Recombinant Fusion Proteins / metabolism
  • Regulatory Sequences, Nucleic Acid*
  • Sequence Deletion
  • Transcription Factors / metabolism*
  • YY1 Transcription Factor

Substances

  • DNA Transposable Elements
  • DNA-Binding Proteins
  • Erythroid-Specific DNA-Binding Factors
  • Recombinant Fusion Proteins
  • Transcription Factors
  • YY1 Transcription Factor
  • YY1 protein, human
  • DNA