Complete foldback transposable elements encode a novel protein found in Drosophila melanogaster

EMBO J. 1989 Jun;8(6):1887-94.


An apparently complete foldback (FB) transposable element homologous to FB white-crimson (FBwc) was analyzed. A complete FB element could encode one or more proteins required for regulation of FB transposition. The central DNA region (the loop) and the junctions between the loop and the inverted terminal repeats were sequenced. Three open reading frames (ORFs) are present in the loop, and a novel 308 bp inverted repeat is present at the junctions. No significant homologies were found when the DNA sequences of the loop region and the novel inverted repeat were screened against the Gene data bank. Antibodies were prepared in guinea-pigs against a peptide present near the amino terminus of ORF1, the longest ORF. A 71,000 dalton protein was isolated from an extract of Drosophila melanogaster early-stage embryos on an anti-ORF1 peptide-affinity column. Immunohistochemical studies of adult flies demonstrate localization of this protein in egg chambers.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Carrier Proteins / genetics
  • Carrier Proteins / isolation & purification
  • DNA / genetics
  • DNA Transposable Elements*
  • Drosophila melanogaster / genetics*
  • Molecular Sequence Data
  • Proteins / genetics*
  • Restriction Mapping


  • Carrier Proteins
  • DNA Transposable Elements
  • Proteins
  • DNA