>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Theoretical MW
14 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.
Publications
Read Publications using 268-N4 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 Acetonitrile and TFA with BSA as a carrier protein.
Purity
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 50 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human NT-4 Protein
GLC10
GLC1O
neurotrophic factor 4
neurotrophic factor 5
neurotrophin 4
neurotrophin 5 (neurotrophin 4/5)
neurotrophin-4
neurotrophin-5
Neutrophic factor 4
NT4
NT-4
NT-4/5
NT-5
NTF4
NTF5
NTF5NT5
Background
Neurotrophin-4 (NT-4), also known as NT-5, is a member of the NGF family of neuronal and epithelial growth factors. Neurotrophins have six conserved cysteine residues that are involved in the formation of three disulfide bonds (1-3). The human NT-4 cDNA encodes a 210 amino acid (aa) precursor that includes a 24 aa signal sequence, a 56 aa propeptide, and a 130 aa mature protein (4, 5). NT-4 is synthesized as a 28 kDa prepropeptide that is proteolytically processed to generate the mature protein. Mature human NT-4 shares 48-52% aa sequence identity with human beta-NGF, BDNF, and NT-3. It shares 91% and 95% aa sequence identity with mouse and rat NT-4/5, respectively. The mature protein is secreted as a homodimer and can also form heterodimers with BDNF or NT-3 (6). NT-4 binds and induces receptor dimerization and activation of TrkB (4, 7). NT-4 promotes the development and survival of selected peripheral and CNS neurons (8-10). BDNF, which also activates TrkB, overlaps with many but not all NT-4 functions, a distinction that is likely due to differences in expression patterns (8-10). NT-4 induced TrkB signaling augments NMDA receptor activity and increases neuronal sensitivity to excitotoxic cell death (11). It also promotes the proliferation of keratinocytes and accelerates hair follicle regression during the follicular cycle (12, 13). NT-4 is secreted by activated T cells and granulocytes at sites of inflammation where it contributes to tissue regeneration (14-16).
Lessmann, V. et al. (2003) Prog. Neurobiol. 69:341.
Tabakman, R. et al. (2004) Prog. Brain Res. 146:387.
Botchkarev, V.A. et al. (2004) Prog. Brain Res. 146:493.
Ip, N.Y. et al. (1992) Proc. Natl. Acad. Sci. 89:3060.
Berkemeier, L.R. et al. (1991) Neuron 7:857.
Radziejewski, C. and R.C. Robinson (1993) Biochemistry 32:13350.
Vesa, J. et al. (2000) J. Biol. Chem. 275:24414.
Davies, A.M. et al. (1993) J. Neurosci. 13:4961.
Stucky, C.L. et al. (1998) J. Neurosci. 18:7040.
Fan, G. et al. (2000) Nat. Neurosci. 3:350.
Choi, S.Y. et al. (2004) J. Neurochem. 88:708.
Botchkarev, V.A. et al. (1999) Lab. Invest. 79:557.
Botchkarev, V.A. et al. (1999) FASEB J. 13:395.
Laurenzi, M.A. et al. (1998) J. Leukoc. Biol. 64:228.
Moalem, G. et al. (2000) J. Autoimmun. 15:331.
Nassenstein, C. et al. (2003) J. Exp. Med. 198:455.
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