Recombinant Human MIF Protein Best Seller

Catalog # 289-MF | R&D Systems, Inc. a Bio-Techne Brand
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Carrier Free
289-MF-002/CF
289-MF-01M/CF
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With Carrier
289-MF-002
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Key Product Details

Accession #

AAA36315

Source

E. coli

Conjugate

Unconjugated

Applications

Bioactivity

Product Specifications

Source

E. coli-derived human MIF protein
Pro2-Ala115, with an N-terminal Met

Purity

>97%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis

Met1 & Pro2

Predicted Molecular Mass

12.4 kDa & 12.3 kDa

Activity

Bioassay data are not available.

Scientific Data Images for Recombinant Human MIF Protein

Recombinant Human MIF Protein SEC-MALS.

Recombinant Human MIF (Catalog # 289-MF) has a molecular weight (MW) of 32.8 kDa as analyzed by SEC-MALS, suggesting that this protein is a homotrimer.  MW may differ from predicted MW due to post-translational modifications (PTMs) present (i.e. Glycosylation).

Formulation, Preparation and Storage

Carrier Free
What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

Carrier: 289-MF
Formulation Lyophilized from a 0.2 μm filtered solution in MES and NaCl with BSA as a carrier protein.
Reconstitution Reconstitute at 10 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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.
Carrier Free: 289-MF/CF
Formulation Supplied as a 0.2 μm filtered solution in MES and NaCl.
Shipping The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 6 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after opening.
  • 3 months, -20 to -70 °C under sterile conditions after opening.

Background: MIF

MIF (or macrophage migration inhibitory factor) was the first lymphokine/cytokine to be recognized in the pregenomics era (1, 2). Regardless, it is one of the least understood of all inflammatory mediators (1, 3). Human MIF is a 12.5 kDa, 115 amino acid (aa) nonglycosylated polypeptide that is synthesized without a signal sequence (4 - 7). Secretion occurs nonclassically via an ABCA1 transporter (8). The initiating Met is removed, leaving Pro as the first amino acid. The molecule consists of two alpha-helices and six beta-strands, four of which form a beta-sheet. The two remaining beta-strands interact with other MIF molecules, creating a trimer (2, 9, 10). Structure-function studies suggest MIF is bifunctional with segregated topology. The N- and C-termini mediate enzyme activity (in theory). Phenylpyruvate tautomerase activity (enol-to-keto) has been demonstrated and is dependent upon Pro at position #1 (11). Amino acids 50 - 65 have also been suggested to contain thiol-protein oxidoreductase activity (12). MIF has proinflammatory cytokine activity centered around aa’s 49 - 65. On fibroblasts, MIF induces, IL-1, IL-8 and MMP expression; on macrophages, MIF stimulates NO production and TNF-alpha release following IFN-gamma activation (13, 14). MIF apparently acts through CD74 and CD44, likely in some form of trimeric interaction (15, 16). Human MIF is active on mouse cells (14). Human MIF is 90%, 94%, 95%, and 90% aa identical to mouse, bovine, porcine and rat MIF, respectively.

References

  1. Norand, E.F. and M. Leech (2005) Front. Biosci. 10:12.
  2. Donn, R.P. and D.W. Ray (2004) J. Endocrinol. 182:1.
  3. Calandra, T. and T. Roger (2003) Nat. Rev. Immunol. 3:791.
  4. Kozak, C.A. et al. (1995) Genomics 27:405.
  5. Weiser, W.Y. et al. (1989) Proc. Natl. Acad. Sci. USA 86:7522.
  6. Paralkar, V. and G. Wistow (1994) Genomics 19:48.
  7. Wistow, G.J. et al. (1993) Proc. Natl. Acad. Sci. USA 90:1272.
  8. Flieger, O. et al. (2003) FEBS Lett. 551:78.
  9. Philo, J.S. et al. (2004) Biophys. Chem. 108:77.
  10. Sun, H-W. et al. (1996) Protein Eng. 9:631.
  11. Stamps, S.L. et. al. (2000) Biochemistry 39:9671.
  12. Nguyen, M.T. et al. (2003) J. Biol. Chem. 278:33654.
  13. Sato, A. et al. (2003) Dev. Comp. Immunol. 27:401.
  14. Bernhagen, J. et al. (1994) Biochemistry 33:14144.
  15. Leng, L. et al. (2003) J. Exp. Med. 197:1467.
  16. Meyer-Siegler, K.L. and P.L. Vera (2005) J. Urol. 173:615.

Long Name

Macrophage Migration Inhibitory Factor

Alternate Names

MIF, EC 5.3.2.1, EC 5.3.3.12, GIFmacrophage migration inhibitory factor, GLIF, Glycosylation-inhibiting factor, L-dopachrome isomerase, L-dopachrome tautomerase, macrophage migration inhibitory factor (glycosylation-inhibiting factor), MMIF, Phenylpyruvate tautomerase

Entrez Gene IDs

4282 (Human); 17319 (Mouse)

Gene Symbol

MIF

UniProt

AAA36315

Product Documents for Recombinant Human MIF Protein

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Download SDS 289-MF (with carrier)
Download SDS 289-MF/CF (carrier free)

Product Specific Notices for Recombinant Human MIF Protein

For research use only

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