Recombinant Human IGFBP-3 Protein

SDS-Page: Human IGFBP-3 Protein [NBP2-35003]

• Reactivity: Hu
• Applications: PAGE, Bioactivity
• Format: Carrier-Free
• Concentration: LYOPH

Recombinant Human IGFBP-3 Protein Summary

• Description: A single non-glycosylated polypeptide chain containing 264 amino acids corresponding to IGFBP-3 Source: E. coli

  Uniprot ID: P17936

  Amino Acid Sequence: GASSAGLGPV VRCEPCDARA LAQCAPPPAV CAELVREPGC GCCLTCALSE GQPCGIYTER CGSGLRCQPS PDEARPLQAL LDGRGLCVNA SAVSRLRAYL LPAPPAPGNA SESEEDRSAG SVESPSVSST HRVSDPKFHP LHSKIIIIKK GHAKDSQRYK VDYESQSTDT QNFSSESKRE TEYGPCRREM EDTLNHLKFL NVLSPRGVHI PNCDKKGFYK KKQCRPSKGR KRGFCWCVDK YGQPLPGYTT KGKEDVHCYS MQSK

• Details of Functionality: Fully biologically active when compared to standard. The ED50 as determined by inhibiting IGF-II induced proliferation of serum free human MCF-7 cells is less than 200 ng/ml, corresponding to a specific activity of > 5.0 x 10^3 IU/mg in the presence of 15 ng/ml of rHuIGF-II.
• Source: E. coli
• Protein/Peptide Type: Recombinant Protein
• Gene: IGFBP3
• Purity: > 98 % pure by SDS-PAGE and HPLC
• Endotoxin Note: Less than 1 EU/ug of IGFBP-3 as determined by LAL method.

Applications/Dilutions

• Dilutions:
  • Bioactivity
  • SDS-Page
• Theoretical MW: 28.8 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.

Packaging, Storage & Formulations

• Storage: Store at -20 to -70C as supplied. After reconstitution, store at 2 to 8C for 1 month and at -20 to -70C for long term storage. Avoid repeated freeze-thaw cycles.
• Buffer: Lyophilized from a 0.2 um filtered concentrated solution in PBS, pH 7.4.
• Preservative: No Preservative
• Concentration: LYOPH
• Purity: > 98 % pure by SDS-PAGE and HPLC
• Reconstitution Instructions: Recommended to centrifuge prior to opening. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0mg/mL.

Alternate Names for Recombinant Human IGFBP-3 Protein

• acid stable subunit of the 140 K IGF complex
• binding protein 29
• binding protein 53
• growth hormone-dependent binding protein
• IBP-3
• IBP3BP-53
• IGF-binding protein 3
• IGFBP3
• IGFBP-3
• insulin-like growth factor binding protein 3
• insulin-like growth factor-binding protein 3

Background

Insulin-like Growth Factor-Binding Protein 3 (IGF-BP3) belongs to the IGFBP family, which are all cysteinerich proteins with conserved cysteine and have an IGFBP domain and a thyroglobulin type-I domain. Mature human IGF-BP3 contains 264 a.a. with three potential N-linked and two potential O-linked glycosylation sites. It is expressed by most tissues and has higher levels during extrauterine life and peak during puberty. The expression of IGF-BP3 in fibroblasts is stimulated by mitogenic growth factors such as Bombesin, Vasopressin, PDGF, and EGF. The protein forms a ternary complex with IGF-I or II and acid-labile subunit. In this form, it circulates in the plasma, prolonging the half-life of IGFs and altering their interaction with cell surface receptors. Decreased plasma levels of IGF-BP3 often happen during the progression of prostate cancer from benign to metastatic disease.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Peptides and proteins are guaranteed for 3 months from date of receipt.

Bioinformatics

• Gene Symbol: IGFBP3
• Uniprot:
  • P17936()
  • P17936()
  • P17936()