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Related Experiment Videos

Fringe forms a complex with Notch.

B G Ju1, S Jeong, E Bae

  • 1National Creative Research Initiative Center for Genetic Reprogramming, Institute of Molecular Biology and Genetics, Seoul National University, Korea.

Nature
|May 23, 2000
PubMed
Summary
This summary is machine-generated.

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Fringe protein modulates Notch signaling by forming complexes with Notch, influencing its ligand preference. This interaction, crucial for development, occurs via specific Notch protein regions and is conserved across species.

Area of Science:

  • Developmental Biology
  • Cell Signaling
  • Molecular Genetics

Background:

  • Fringe protein and its homologs are key in pattern formation and boundary determination.
  • Fringe is known to modulate Serrate-Notch and Delta-Notch signaling pathways.

Purpose of the Study:

  • To elucidate the molecular mechanism of Fringe-Notch interaction.
  • To identify the specific domains of Notch involved in binding Fringe.
  • To understand how Fringe binding affects Notch signaling specificity.

Main Methods:

  • Co-expression of Fringe and Notch proteins.
  • Analysis of Notch mutations (Abruptex59b, AxM1, l(1)N(B)) affecting Fringe interaction.
  • In vitro protein mixing assays.
  • Subcellular colocalization studies.

Related Experiment Videos

Main Results:

  • Fringe and Notch form a complex through Lin-Notch repeats and EGF repeats 22-36 of Notch.
  • Specific mutations in EGF repeats (Ax59b, AxM1) disrupt Fringe-Notch interaction via EGF22-36.
  • A mutation in Lin-Notch repeats (l(1)N(B)) abolishes interaction via Lin-Notch repeats.
  • Ax mutations impact Notch response to Fringe in vivo.
  • Fringe-Notch complex formation may occur prior to secretion.

Conclusions:

  • Fringe acts cell-autonomously to alter Notch ligand preference by binding specific Notch domains.
  • The conserved Fringe-Notch interaction mechanism underlies its role in diverse developmental processes across species.