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Human Neurotrophin-4 (hNT-4) #5592

Inquiry Info. # 5592

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    Product Information

    Formulation

    With carrier: Lyophilized from a 0.22 μm filtered solution of 20 mM citrate, pH 3.0 containing 100 mM NaCl and 20 μg BSA per 1 μg hNT-4. Carrier free: Lyophilized from a 0.22 μm filtered solution of 20 mM citrate, pH 3.0 containing 100 mM NaCl.

    Storage

    Stable in lyophilized state at 4°C for 1 year after receipt. Sterile stock solutions reconstituted with carrier protein are stable at 4°C for 2 months and at -20°C for 6 months. Avoid repeated freeze-thaw cycles.
    Maintain sterility. Storage at -20°C should be in a manual defrost freezer.

    Product Description

    MW (kDa) 14
    Purity >98% as determined by SDS-PAGE of 6 μg reduced (+) and non-reduced (-) recombinant hNT-4. All lots are greater than 98% pure.
    Endotoxin Less than 0.01 ng endotoxin/1 μg hNT-4.
    Activity The activity of hNT-4 was assessed by quatification of phospho-TrkB in TrkB transfected NIH/3T3 cells. The observed ED50 values are between 1-4 ng/ml.
    Molecular Formula Recombinant hNT-4 does not have a Met on the amino terminus and has a calculated MW of 13,923. DTT-reduced and non-reduced protein migrate as 14 kDa polypeptides. The expected amino-terminal GVSET of recombinant hNT-4 was verified by amino acid sequencing.

    Source / Purification

    Recombinant human Neurotrophin-4 (hNT-4) Gly81-Ala210 (Accession #NP_006170) was produced in E.coli at Cell Signaling Technology.

    Background

    NT-4 is a member of the structurally related neurotrophin family of proteins, which includes β-NGF, BDNF and NT-3 (1). NT-4 is expressed in a number of cell types and tissues, including neuronal cells, normal breast epithelial cells, melanocytes, activated T cells, and granulocytes (1-5). NT-4 is required for the development of peripheral sensory neurons (6,7). NT-4 may be important for the development of long term memory (8). Increased NT-4 expression in melanoma cells promotes cell proliferation and migration (5). NT-4 is secreted from cells as a precursor protein, which is proteolytically cleaved into the mature form (1). NT-4 signaling is mediated through two distinct receptors, the neurotrophin receptor p75NTR and the Trk tyrosine kinase receptor TrkB. While all neurotrophins bind to the p75NTR receptor, NT-4 preferentially binds to the TrkB receptor (1).
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