Recombinant Human Neuronal Pentraxin 2 Protein, CF Summary
Details of Functionality
Measured by the ability of the immobilized protein to support the adhesion of TT human medullary thyroid cancer cells. The ED50 for this effect is 0.6‑2.4 μg/mL.
Source
Mouse myeloma cell line, NS0-derived human Neuronal Pentraxin 2 protein Gly16-Leu431, with a C-terminal 6-His tag
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<0.01 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Theoretical MW
46.5 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
50-60 kDa, reducing conditions
Publications
Read Publication using 7816-NP in the following applications:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS.
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 400 μg/mL in PBS.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human Neuronal Pentraxin 2 Protein, CF
Apexin
NARP
neuronal activity-regulated pentaxin
Neuronal Pentraxin 2
neuronal pentraxin IIapexin
neuronal pentraxin-2
NP2
NP-II
NPTX2
Background
Neuronal Pentraxin (NPTX2), also called NP2 or NARP (neuronal activity-regulated pentraxin) is a 46-60 kDa secreted glycoprotein within the Pentraxin family (1-4). Neuronal pentraxins include NPTX1 and NPTX2, both secreted proteins, and NPTXR (Neuronal Pentraxin Receptor), which is found in type II transmembrane or cleaved, soluble forms (1-5). Circulating NPTX2 forms disulfide-linked 250 kDa homopentamers, while at excitatory synapses it can form heteropentamers and larger clusters with NPTX1 and NPTXR (1-5). The clusters promote synaptogenesis by recruiting subunits of AMPA-type glutamate receptors (AMPAR) (4-6). Of the three neuronal pentraxins, only NPTX2 shows immediate-early expression induced by synaptic activity (5, 6). Human NPTX2 is synthesized as a 431 amino acid (aa) protein with a 15 aa signal sequence and a 416 aa secreted mature protein that contains a calcium binding Pentraxin domain. Mature human NPTX2 shares 96% aa sequence identity with mouse, rat, bovine, and canine NPTX2. Unlike other neuronal pentraxins, NPTX2 expression is not limited to neurons and NPTX2 protein is detected in the plasma (1, 7). It is prominent in the hippocampus, cerebral cortex, cerebellum, hypothalamus, posterior pituitary, and retina (2-8). It is found at excitatory synapses in parvalbumin-expressing interneurons and vasopressin- and orexin-expressing hypothalamic neurons (5-7). Its expression is increased in the substantia nigra in Parkinson’s disease, and it is present in Lewy bodies (9). NPTX2 shows calcium-dependent adhesion (3, 6). It promotes axon outgrowth in cortical explants, and formation, maturation and plasticity of synapses in vivo (3-6, 8).
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Tsui, C.C. et al. (1996) J. Neurosci. 16:2463.
Cho, R.W. et al. (2008) Neuron 57:858.
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Chang, M.C. et al. (2010) Nat. Neurosci. 13:1090.
Reti, I.M. et al. (2008) Neuroscience 151:352.
Bjartmar, L. et al. (2006) J. Neurosci. 26:6269.
Moran, L.B. et al. (2008) Acta Neuropathol. 115:471.
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