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Related Experiment Videos

The evolving doublecortin (DCX) superfamily.

Orly Reiner1, Frédéric M Coquelle, Bastian Peter

  • 1Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel. orly.reiner@weizmann.ac.il

BMC Genomics
|July 28, 2006
PubMed
Summary
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The Doublecortin (DCX) gene family, crucial for neuronal development, shows conserved evolution across species. Studying its members and their specialized domains aids in understanding genetic diseases and developing accurate models.

Area of Science:

  • Genomics
  • Evolutionary Biology
  • Neuroscience

Background:

  • Doublecortin (DCX) domains are key protein interaction sites.
  • Mutations in DCX family genes cause diseases like epilepsy, blindness, and dyslexia.
  • Understanding DCX superfamily is vital for genetic disease research.

Purpose of the Study:

  • To investigate the evolutionary history of the DCX gene family across species.
  • To analyze the sub-specialization and divergence of DCX domains.
  • To correlate gene expression patterns with potential disease links.

Main Methods:

  • Comparative genomics across vertebrates, invertebrates, and unicellular organisms.
  • Sequence analysis of N-terminal and C-terminal DCX domains.
  • Developmental in situ hybridization and co-expression analysis using Unigene data.

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Main Results:

  • Identified eleven paralogs of the DCX-repeat gene family in humans and mice.
  • Documented evolutionary additions and losses of genes and domains.
  • Observed sub-specialization and divergence in DCX domains.

Conclusions:

  • The DCX superfamily is conserved across diverse species.
  • Sequence and expression analyses can predict human disease-mouse model correlations.
  • Gene addition to the DCX family is explained by sub-specialization and divergence.