OSM Protein, Human (His)

OSM protein is a multifunctional growth regulator with dual functions of inhibiting tumor cell lines and stimulating the proliferation of AIDS-KS cells. It coordinates the production of cytokines, including IL-6, G-CSF, and GM-CSF, and binds to type I and type II OSM receptors, forming heterodimers with LIFR/IL6ST and OSMR/IL6ST, respectively. OSM Protein, Human (His) is the recombinant human-derived OSM protein, expressed by E. coli , with N-6*His labeled tag.

OSM Protein stands as a versatile growth regulator with dual inhibitory effects on the proliferation of various tumor cell lines and stimulatory effects on AIDS-KS cell proliferation. Notably, OSM orchestrates the regulation of cytokine production, including IL-6, G-CSF, and GM-CSF from endothelial cells. This multifaceted growth regulator engages both the type I OSM receptor, forming heterodimers composed of LIFR and IL6ST, and the type II OSM receptor, forming heterodimers composed of OSMR and IL6ST. Beyond its antiproliferative and proliferative roles, OSM plays a crucial part in the maturation of fetal hepatocytes, contributing significantly to liver development and regeneration.

Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. The ED₅₀ for this effect is 0.1-1.0 ng/mL.

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  Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. The ED₅₀ for this effect is 0.2921 ng/mL, corresponding to a specific activity is 3.423×10⁶ units/mg.

Human

E. coli

N-6*His

P13725 (A26-R221)

5008  [NCBI]

Full Length of Mature Protein

AAIGSCSKEYRVLLGQLQKQTDLMQDTSRLLDPYIRIQGLDVPKLREHCRERPGAFPSEETLRGLGRRGFLQTLNATLGCVLHRLADLEQRLPKAQDLERSGLNIEDLEKLQMARPNILGLRNNIYCMAQLLDNSDTAEPTKAGRGASQPPTPTPASDAFQRKLEGCRFLHGYHRFMHSVGRVFSKWGESPNRSRR

Approximately 24-28 kDa, based on SDS-PAGE under reducing conditions.

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  ≥ 95%, as determined by reducing SDS-PAGE.

Lyophilized powder

1.Lyophilized from a 0.22 μm filtered solution of 20 mM Tris-HCl, 200 mM NaCl, pH 7.5.
2.Lyophilized from a 0.22 μm filtered solution of 20 mM Tris-HCl, 1 mM EDTA, 200 mM NaCl,4% Mannitol, pH 7.5.
Please refer to the lot-specific COA for specific buffer information.
Note: For SPR assay, please replace the buffer. Primary amine components (e.g., Tris, imidazole) can affect protein-coupled chips.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.