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Updated: Jun 22, 2026

Kinase Inhibitor Screening In Self-assembled Human Protein Microarrays
Published on: October 23, 2019
Protein microarray analysis identifies cyclic nucleotide phosphodiesterase as an interactor of Nogo-A
Kenta Sumiyoshi1, Shinya Obayashi, Hiroko Tabunoki
1Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, Tokyo 204-8588, Japan.
Abstract:
Nogo-A, a neurite outgrowth inhibitor, is expressed exclusively on oligodendrocytes and neurons in the CNS. The central domain of Amino-Nogo spanning amino acids 567-748 in the human Nogo-A designated NIG, mediates persistent inhibition of axonal outgrowth and induces growth cone collapse by signaling through an as yet unidentified NIG receptor. We identified 82 NIG-interacting proteins by screening a high-density human protein microarray composed of 5000 proteins with a recombinant NIG protein as a probe. Following an intensive database search, we selected 12 neuron/oligodendrocyte-associated NIG interactors. Among them, we verified the molecular interaction of NIG with 2', 3'-cyclic nucleotide 3'-phosphodiesterase (CNP), a cell type-specific marker of oligodendrocytes, by immunoprecipitation and cell imaging analysis. Although CNP located chiefly in the cytoplasm of oligodendrocytes might not serve as a cell-surface NIG receptor, it could act as a conformational stabilizer for the intrinsically unstructured large segment of Amino-Nogo.
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