1. Recombinant Proteins
  2. Cytokines and Growth Factors
  3. IGF family
  4. IGFBP-3
  5. IGFBP-3 Protein, Human

IGFBP-3 Protein, Human

Cat. No.: HY-P7020
COA Handling Instructions

IGFBP-3 Protein, Human belongs to insulin-like growth factor-binding protein, prolongs the half-life of the insulin-like growth factors (IGFs), inhibits interaction of IGFs with their cell surface receptors, and functions in cancer reduction.

For research use only. We do not sell to patients.

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50 μg $350 In-stock
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  • Biological Activity

  • Technical Parameters

  • Properties

  • Documentation

  • References

Description

IGFBP-3 Protein, Human belongs to insulin-like growth factor-binding protein, prolongs the half-life of the insulin-like growth factors (IGFs), inhibits interaction of IGFs with their cell surface receptors, and functions in cancer reduction.

Background

Insulin-like Growth Factor-Binding Proteins (IGFBPs) modulate the actions of secreted insulin-like growth facts (IGFs) by binding to them and increase the IGF halflife in the extracellular milieu and circulation by sequestering them in this bound form. IGFBPs either enhance or inhibit IGF actions on target cells; the individual IGFBPs either inhibit or potentiate IGF effects on osteoblasts in bone[1]. Insulin-like Growth Factor-Binding Protein 3 (IGFBP3) is involved in prolonging the half-life of the IGFs (from 12 minutes to 12 hours), inhibits interaction of IGFs with their cell surface receptors, as well as, it is a circulating reservoir of IGFs. Moreover, IGFBP3 functions in cancer reduction, by both IGF-dependent and IGF-independent mechanisms. IGFBP3 has been shown to reduce the risk of breast cancer in high doses. A high concentration of IGFBP3 prevents IGF1:IGF1R interaction and blocks the IGF1R tyrosine kinase activity, resulting in the inhibition of the formation of intracellular signaling cascades[2].

Biological Activity

The ED50 is <200 ng/mL as measured by serum free human MCF-7 cells, corresponding to a specific activity of >5.0 × 103 units/mg.

Species

Human

Source

E. coli

Tag

Tag Free

Accession

P17936 (G28-K291)

Gene ID
Molecular Construction
N-term
IGFBP-3 (G28-K291)
Accession # P17936
C-term
Synonyms
rHuIGF-BP3; IBP-3; IGF-binding protein 3; IGFBP-3
AA Sequence

GASSGGLGPVVRCEPCDARALAQCAPPPAVCAELVREPGCGCCLTCALSEGQPCGIYTERCGSGLRCQPSPDEARPLQALLDGRGLCVNASAVSRLRAYLLPAPPAPGNASESEEDRSAGEVESPSVSSTHRVSDPKFHPLHSKIIIIKKGHAKDSQRYKVDYESQSTDTQNFSSESKRETEYGPCRREMEDTLNHLKFLNVLSPRGVHIPNCDKKGFYKKKQCRPSKGRKR

Molecular Weight

Approximately 28.8 kDa

Purity

Greater than 95% as determined by reducing SDS-PAGE.

Appearance

Lyophilized powder.

Formulation

Lyophilized after extensive dialysis against PBS, pH 7.4.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

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).

Storage & Stability

Stored at -20°C for 2 years. 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.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation
References

IGFBP-3 Protein, Human Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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IGFBP-3 Protein, Human
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HY-P7020
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