Teneurin-1, a vertebrate homologue of the Drosophila pair-rule gene ten-m, is a neuronal protein with a novel type of heparin-binding domain

Ariane D. Minet, Beatrix P. Rubin, Richard P Tucker, Stefan Baumgartner, Ruth Chiquet-Ehrismann

Research output: Contribution to journalArticle

73 Scopus citations

Abstract

The Drosophila gene ten-m is the first pair-rule gene not encoding a transcription factor, but an extracellular protein. We have characterized a highly conserved chicken homologue that we call teneurin-1. The C-terminal part harbors 26 repetitive sequence motifs termed YD-repeats. The YD-repeats are most similar to the core of the rhs elements of Escherichia coli. Related repeats in toxin A of Clostridium difficile are known to bind specific carbohydrates. We show that recombinantly expressed proteins containing the YD-repeats of teneurin-1 bind to heparin. Furthermore, heparin lyase treatment of extracts of cells expressing recombinant YD-repeat protein releases this protein from high molecular mass aggregates. In situ hybridization and immunostaining reveals teneurin-1 expression in neurons of the developing visual system of chicken and Drosophila. This phylogenetic conservation of neuronal expression from flies to birds implies fundamental roles for teneurin-1 in neurogenesis. This is supported by the neurite outgrowth occurring on substrates made of recombinant YD-repeat proteins, which can be inhibited by heparin. Database searches resulted in the identification of ESTs encoding at least three further members of the teneurin family of proteins. Furthermore, the human teneurin-1 gene could be identified on chromosome Xq24/25, a region implied in an X-linked mental retardation syndrome.

Original languageEnglish (US)
Pages (from-to)2019-2032
Number of pages14
JournalJournal of Cell Science
Volume112
Issue number12
StatePublished - 1999

    Fingerprint

Keywords

  • Carbohydrate-binding
  • Development
  • Heparin
  • Nervous system
  • Teneurin-1

ASJC Scopus subject areas

  • Cell Biology

Cite this