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Related Experiment Videos

Structural bases for CRMP function in plexin-dependent semaphorin3A signaling.

Rahul C Deo1, Eric F Schmidt, Abdellah Elhabazi

  • 1Laboratory of Molecular Biophysics, The Rockefeller University, New York, NY, USA.

The EMBO Journal
|December 20, 2003
PubMed
Summary
This summary is machine-generated.

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Collapsin response mediator proteins (CRMPs) are key in nerve cell development. This study reveals CRMP1

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Structural Biology

Background:

  • Collapsin response mediator proteins (CRMPs) are crucial for neuronal differentiation and axonal guidance.
  • CRMP2 mediates Sema3A-induced axonal repulsion and specification.
  • Understanding CRMP structure and function is vital for neuronal development research.

Purpose of the Study:

  • To determine the X-ray crystal structure of murine CRMP1.
  • To map functional domains of CRMP1 using structure-based mutagenesis.
  • To elucidate the role of CRMP in Sema3A signaling pathways.

Main Methods:

  • X-ray crystallography of murine CRMP1.
  • Structure-based mutagenesis of CRMP1.
  • Reconstituted Sema3A signaling assay in COS-7 cells expressing Neuropilin1 and PlexinA1.

Related Experiment Videos

  • Analysis of CRMP-PlexA1 complex formation and cell contraction assays.

    • Main Results:

    • The X-ray crystal structure of CRMP1 revealed a bilobed, tetrameric assembly.
    • CRMP1 forms a complex with PlexinA1, modulated by Neuropilin1 and Sema3A.
    • A constitutively active CRMP1 mutant induced Sema3A-independent cell contraction and affected axonal repulsion.
    • CRMP accelerates Sema3A-induced cell contraction.

    Conclusions:

    • CRMP1's structure provides insights into its function in Plex-dependent Sema3A signaling.
    • CRMP plays a direct role in mediating Sema3A signaling pathways.
    • Mutagenesis identified a functional domain critical for CRMP activity in neuronal signaling.