Fibroblast Growth Factor 23 C-terminal Peptide Human E. coli

Introduction to the Molecule

FGF-23 is a secreted, nonglycosylated monomeric protein belonging to the FGF family. Full-lenght FGF-23 is a phosphaturic hormone which blocks neural phosphate reabsorbtion. Upon processing, biologically inactive N- and C- terminal fragments are generated. Defects in FGF-23 is associated with autosomal dominant hypophosphatemic rickets. The FGF-23 gene encodes a member of the fibroblast growth factor family that is mutant in autosomal dominant hypophosphatemic rickets (ADHR). Tumor-induced osteomalacia is one of the paraneoplastic disorders characterized by hypophosphatemia caused by renal phosphate wasting. The fact that removal of responsible tumors normalizes phosphate metabolism is evidence that a humoral phosphaturic factor, sometimes called phosphatonin, is the basis of tumor-induced osteomalacia. Thus, overproduction of FGF-23 causes tumor-induced osteomalacia, whereas mutations in the FGF-23 gene result in autosomal hypophosphatemic rickets possibly by preventing proteolytic cleavage, which enhances the biologic activity of FGF-23. The mutations in FGF-23 found in ADHR lie within 3 nucleotides of each other in the proprotein convertase cleavage site. Jonsson et al. (2003) showed that FGF-23 is readily detectable in the plasma or serum of healthy persons and can be markedly elevated in those with oncogenic osteomalacia or X-linked hypophosphatemia, suggesting that this growth factor has a role in phosphate homeostasis.

Research topic

Renal disease

Description

Total 81 AA. MW: 8.67 kDa (calculated). N-Terminal His-tag, 9 extra AA (highlighted).

Amino Acid Sequence

Source

E. coli

SDS-PAGE gel

14% SDS-PAGE separation of Human FGF23 C-terminal peptide 1. M.W. marker – 14, 21, 31, 45, 66, 97 kDa 2. reduced and boiled sample, 5μg/lane 3. non-reduced and non-boiled sample, 5μg/lane

Formulation

Filtered (0,4 μm) and lyophilized in 0.5 mg/mL in 20mM TRIS, 50mM NaCl, pH 7.5

Reconstitution

Add deionized water to prepare a working stock solution of 0.5 mg/mL and let the lyophilized pellet dissolve completely. Product is not sterile! Please filter the product by an appropriate sterile filter before using it in the cell culture.

Storage, Stability/Shelf Life

Store lyophilized protein at –80°C. Lyophilized protein remains stable until the expiry date when stored at –80°C. Aliquot reconstituted protein to avoid repeated freezing/thawing cycles and store at –80°C for long term storage. Reconstituted protein can be stored at 4°C for a week.

Quality Control Test

BCA to determine quantity of the protein.

SDS PAGE to determine purity of the protein.

Applications

Western blotting

By research topic:

• Renal disease

By molecule:

• Fibroblast Growth Factor 23