RNA recognition and translational regulation by a homeodomain protein

Nature. 1996 Feb 22;379(6567):694-9. doi: 10.1038/379694a0.

Abstract

In Drosophila, the primary determinant of anterior pattern is the gradient morphogen bicoid (bcd), a homeodomain protein that binds DNA and transcriptionally activates target genes at different threshold concentrations. Here we present evidence that bcd also binds RNA and acts as a translational repressor to generate an opposing gradient of the homeodomain protein caudal (cad). RNA binding by bcd seems to involve direct interactions between the bcd homeodomain and discrete target sequences within the 3' untranslated region of the cad messenger RNA and to block the initiation of cad translation.

MeSH terms

  • Animals
  • Animals, Genetically Modified
  • Base Sequence
  • Binding Sites
  • Cell Line
  • DNA
  • Drosophila / embryology
  • Drosophila / genetics
  • Drosophila Proteins
  • Female
  • Gene Expression Regulation, Developmental*
  • Homeodomain Proteins / genetics
  • Homeodomain Proteins / metabolism*
  • Insect Hormones / metabolism*
  • Introns
  • Molecular Sequence Data
  • Peptide Chain Initiation, Translational
  • Peptide Fragments / metabolism
  • Protein Biosynthesis*
  • RNA, Messenger / metabolism*
  • RNA-Binding Proteins / metabolism*
  • Recombinant Fusion Proteins / metabolism
  • Regulatory Sequences, Nucleic Acid
  • Repressor Proteins / metabolism
  • Trans-Activators*
  • Transcription Factors

Substances

  • Drosophila Proteins
  • Homeodomain Proteins
  • Insect Hormones
  • Peptide Fragments
  • RNA, Messenger
  • RNA-Binding Proteins
  • Recombinant Fusion Proteins
  • Repressor Proteins
  • Trans-Activators
  • Transcription Factors
  • bcd protein, Drosophila
  • cad protein, Drosophila
  • DNA