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Updated: Aug 6, 2025
Study of Protein Dynamics via Neutron Spin Echo Spectroscopy
Published on: April 13, 2022
Investigation of dynamic solution interactions between NET-1 and UNC-5B by multi-wavelength analytical
Haben Gabir1, Monika Gupta2, Markus Meier1
1Department of Chemistry, University of Manitoba, Winnipeg, MB, Canada.
Abstract:
NET-1 is a key chemotropic ligand that signals commissural axon migration and change in direction. NET-1 and its receptor UNC-5B switch axon growth cones from attraction to repulsion. The biophysical properties of the NET-1 + UNC-5B complex have been poorly characterized. Using multi-wavelength-AUC by adding a fluorophore to UNC-5B, we were able to separate the UNC-5B sedimentation from NET-1. Using both multi-wavelength- and single-wavelength AUC, we investigated NET-1 and UNC-5B hydrodynamic parameters and complex formation. The sedimentation velocity experiments show that NET-1 exists in a monomer-dimer equilibrium. A close study of the association shows that NET-1 forms a pH-sensitive dimer that interacts in an anti-parallel orientation. UNC-5B can form equimolar NET-1 + UNC-5B heterocomplexes with both monomeric and dimeric NET-1.
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