Recombinant Mouse Pappalysin-1/PAPP-A His-tag Protein, CF

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R&D Systems Recombinant Proteins and Enzymes
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Product Details

Recombinant Mouse Pappalysin-1/PAPP-A His-tag Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by its ability to cleave IGFBP-5.

Recombinant Mouse Pappalysin-1/PAPPA will cleave >50% of Recombinant Human IGFBP‑5 (Catalog # 875-B5), as measured under the described conditions.

Mouse myeloma cell line, NS0-derived mouse Pappalysin-1/PAPP-A protein
with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Predicted Molecular Mass
173 kDa
141-200 kDa, under reducing conditions

Product Datasheets

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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.


Formulation Supplied as a 0.2 μm filtered solution in Tris, CaCl2, NaCl and CHAPS.
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.
  • 3 months, -20 to -70 °C under sterile conditions after opening.

Assay Procedure

  • Assay Buffer: 50 mM Tris, 10 mM CaCl2, 150 mM NaCl (TCN)
  • Recombinant Mouse Pappalysin-1/PAPPA (rmPappalysin-1) (Catalog # 10174-ZN)
  • Recombinant Human IGFBP‑5 (Catalog # 875-B5)
  • Reducing SDS-PAGE Gel Buffer
  • SDS-PAGE or Western Blot
  1. Dilute rmPappalysin-1 to 10 µg/mL in Assay Buffer.
  2. Dilute rhIGFBP-5 to 200 µg/mL in Assay Buffer.
  3. Combine equal volumes of 10 µg/mL of rmPappalysin-1 and 200 µg/mL rhIGFBP-5.  Include two controls containing Assay Buffer in place of rmPappalysin-1.
  4. Incubate reaction vials and one control at 37 C for 1 hour.  Keep the other control at -20 °C during the incubation period.
  5. Combine equal volumes of rmPappalysin-1/rhIGFBP-5 reaction mixture and reducing SDS-PAGE gel buffer.
  6. Analyze the cleavage by SDS-PAGE (load 20 µL/Lane) followed by protein staining and/or Western blot.
Per Lane:
  • rmPappalysin-1/PAPPA: 0.050 µg
  • rhIGFBP-5: 1 µg
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: Pappalysin-1/PAPP-A

Pappalysins belong to a fifth family of metzincins that consists of ADAMs/ADAMTSs, MMPs, astacins and serralysins (1). Pappalysin-1 (PAPP-A) is a secreted, disulfide-linked 400 kDa homodimer with an N-terminal catalytic domain and five C-terminal Sushi domains (2). PAPP-A cleaves Insulin-like Growth Factor-Binding Protein-4 and -5 (IGFBP-4 and -5) at a single site, resulting in the release of bioactive IGF (3). PAPP-A also contains three Lin12-Notch repeats (LNR) that bind calcium and are required for cleavage of IGFBP-4, but not IGFBP-5 (2). PAPP-A is thought to be the only physiological IGFBP-4 proteinase supported by the observation that no IGFBP-4 cleavage occurred in embryonic fibroblasts derived from PAPP-A knockout mice (4).  As a regulator of IGF bioavailability, and consequently IGF signaling, PAPP-A is an attractive therapeutic target (5-8).  PAPP-A knockout mice have an extended lifespan (9) and use of specific neutralizing antibodies causes inhibition of atherosclerotic plaque progression (10). PAPP-A levels are elevated in cancer (11-14) and PAPP-A has been identified as a migration/invasion-promoting gene (5,6, 12). PAPP-A is also important during pregnancy where PAPP-A levels are increased in the plasma by a factor of about 150. Low maternal serum levels of PAPP-A is used as an indication of Down syndrome or other fetal aneuploidies in the first trimester of pregnancy (15).

  1. Boldt, H. B. et al. (2001) Biochem. J. 358:359.
  2. Boldt, H. B. et al. (2004) J. Biol. Chem. 279:38525.
  3. Laursen, L. S. et al. (2001) FEBS Lett. 504:36.
  4. Conover, C. A. et al. (2004) Development 131:1187.
  5. Huang, J. et al. (2013) Oncotarget. 4:1172.
  6. Prithviraj, P. et al. (2015) Oncotarget 6: 15953.
  7. Yu, X. E. et al. (2018) Atherosclerosis. 278:250.
  8. Guo, Y. et al. (2018) Am. J. Cancer Res. 8:955.
  9. Conover, C. A. et al. (2010) J. Gerontol. A. Biol. Sci. Med. Sci. 65:590.
  10. Conover, C. A. et al. (2016) J Cardiovasc. Transl. Res. 9:77.
  11. Bulut, I. et al. (2009) Am. J. Med. Sci. 337: 241.
  12. Boldt, H. B. and Conover C. A. (2011) Endocrinology 152:1470.
Long Name
Pregnancy-associated Plasma Protein 1
Entrez Gene IDs
5069 (Human); 18491 (Mouse)
Alternate Names
ASBABP2; DIPLA1; EC; IGFBP-4ase; IGFBP-4aseaspecific BCL2 ARE-binding protein 2; IGF-dependent IGFBP-4 protease; insulin-like growth factor-dependent IGF binding protein-4 protease; Insulin-like growth factor-dependent IGF-binding protein 4 protease; PAPA; PAPPA; PAPPA1; PAPP-A1; PAPP-Adifferentially placenta 1 expressed protein; Pappalysin1; Pappalysin-1; pregnacy-associated plasma protein A; Pregnancy-associated plasma protein A; pregnancy-associated plasma protein A, pappalysin 1


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