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Abstract of [Han15]

[Han15]
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The Olfactomedin Domain from Gliomedin is a β-Propeller with Unique Structural Properties

Huijong Han and Petri Kursula

J. Biol. Chem. 290, 3612–3621 (2015)

[bib][BibTeX][pdf][pdf][link]doi:10.1074/jbc.M114.627547

All members of the olfactomedin (OLF) family have a conserved extracellular OLF domain, for which a structure has not been available. We present here the crystal structure of the OLF domain from gliomedin. Gliomedin is a protein expressed by Schwann cells in peripheral nerves, important for the formation of the nodes of Ranvier. Gliomedin interacts with neuronal cell adhesion molecules, such as neurofascin, but the structural details of the interaction are not known. The structure of the OLF domain presents a 5-bladed β-propeller fold, with unusual geometric properties. The symmetry of the structure is not 5-fold, but rather, reveals a twisted arrangement. The conserved top face of the gliomedin OLF domain is likely to be important for binding to neuronal ligands. Our results provide a structural basis for the functions of gliomedin in Schwann cells, enable the understanding of the role of the gliomedin OLF domain in autoimmune neuropathies, and unravel the locations of human disease-causing mutations in other OLF family members, including myocilin.

Tags: Cell-surface Protein, Crystal Structure, Myelin, Neurodevelopment, Protein Domain, Protein Structure, Schwann Cells, Structural Biology, X-ray Crystallography, Olfactomedin


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