|Detection of Mouse Neuroplastin by Western Blot. Western blot shows lysates of mouse brain (whole) tissue and mouse brain (cerebellum) tissue. PVDF membrane was probed with 0.05 µg/mL of Sheep Anti-Mouse Neuroplastin Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7818) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for Neuroplastin at approximately 55-65 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.|
Neuroplastin (NPTN or neural plasticity-dependent synaptic rearrangement protein; also Np65 and SDR-1) is a 63-67 kDa member of the CD147 family, Ig‑superfamily of molecules. Its expression is primarily restricted to the PSD of select neurons, and it likely serves as a cell adhesion molecule between cells. NPTN is known to bind homotypically in trans, and this complex appears to interact with FGFR1 in cis. Engagement of the FGFR induces neurite outgrowth. Notably, rodent and human Np65 show distinctly different staining patterns in the hippocampus and cerebellum of the brain. Mature mouse NPTN is a 369 amino acid (aa) type I transmembrane glycoprotein. It possesses a 310 aa extracellular region (aa 29-338) that contains three Ig-like domains (aa 29-134; 148-234; 237-327), and a 38 aa cytoplasmic tail. There are three splice forms that have been described. One is a widely-expressed 53-57 kDa isoform (Np55) that contains a Glu substitution for aa 31‑147, a second is a splice form that shows the above substitution coupled to a deletion of aa 371-374, and a third is an isoform that contains a nine aa substitution for aa 1-235. Over aa 1-338, mouse NPTN shares 95% and 98% aa sequence identity with human and rat NPTN/Np65, respectively.
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