Recombinant Human FGF-23
Human FGF-23 belongs to the FGF-19 subfamily which has three members FGF-19, 21, 23. All FGF family members are heparin binding growth factors with a core 120 amino acid (a.a.) FGF domain that allows for a common tertiary structure. They are classically considered to be paracrine factors and are known for their roles in tissue patterning and organogenesis during embryogenesis. By contrast, the FGF-19 subfamily has recently been shown to function in an endocrine manner. Members of this subfamily have poor ability of binding to heparin binding site which is a crucial factor in ligand-receptor complex formation. β-Klotho has been identified as co-factor required for FGF-19, 21, 23 signaling. It can obviously increase ligand-receptor affinity. FGF-23 is most highly expressed in bone, from which it circulates through the blood to regulate vitamin D and phosphate metabolism in kidney.
Reference:
1. Smallwood PM, Munoz-Sanjuan I, Tong P, et al. 1996. Proc Natl Acad Sci U S A. 93:9850-7.
2. Fu L, John LM, Adams SH, et al. 2004. Endocrinology. 145:2594-603.
3. Kharitonenkov A, Shiyanova TL, Koester A, et al. 2005. J Clin Invest. 115:1627-35.
4. Kurosu H, Kuro OM. 2009. Mol Cell Endocrinol. 299:72-8.
5. Lin BC, Wang M, Blackmore C, et al. 2007. J Biol Chem. 282:27277-84.
6. Kharitonenkov A, Dunbar JD, Bina HA, et al. 2008. J Cell Physiol. 215:1-7.
7. Riminucci M, Collins MT, Fedarko NS, et al. 2003. J Clin Invest. 112:683-92.
8. Shimada T, Hasegawa H, Yamazaki Y, et al. 2004. J Bone Miner Res. 19:429-35.
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Gene ID |
8074 |
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Accession # |
Q9GZV9 |
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Alternate Names |
TNFRSF17, BCM, CD269 |
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Source |
Escherichia coli. |
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M.Wt |
Approximately 25.3 kDa, a single non-glycosylated polypeptide chain containing 227 amino acids. |
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AA Sequence |
YPNASPLLGS SWGGLIHLYT ATARNSYHLQ IHKNGHVDGA PHQTIYSALM IRSEDAGFVV ITGVMSRRYL CMDFRGNIFG SHYFDPENCR FQHQTLENGY DVYHSPQYHF LVSLGRAKRA FLPGMNPPPY SQFLSRRNEI PLIHFNTPIP RRHTRSAEDD SERDPLNVLK PRARMTPAPA SCSQELPSAE DNSPMASDPL GVVRGGRVNT HAGGTGPEGC RPFAKFI |
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Appearance |
Sterile Filtered White lyophilized (freeze-dried) powder. |
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Stability & Storage |
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. |
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Formulation |
Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH 7.4. |
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Reconstitution |
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/ml. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions. |
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Biological Activity |
Fully biologically active when compared to standard. The ED50 as determined by thymidine uptake assay using FGF-receptors transfected BaF3 cells is less than 0.5 μg/ml, corresponding to a specific activity of > 2.0 × 103 IU/mg in the presence of 0.3 μg/ml of rMuKlotho and 10 μg/ml of heparin. |
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Shipping Condition |
Gel pack. |
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Handling |
Centrifuge the vial prior to opening. |
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Usage |
For Research Use Only! Not to be used in humans. |
Quality Control & MSDS
- View current batch:
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Purity > 95 % by SDS-PAGE and HPLC analyses.
- Datasheet
Endotoxin: Less than 1 EU/µg of rHuFGF-23 as determined by LAL method.