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Recombinant Human Pappalysin-2/PAPP-A2 Protein, CF

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications Enzyme Activity
Format
Carrier-Free

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Recombinant Human Pappalysin-2/PAPP-A2 Protein, CF Summary

Details of Functionality
Measured by its ability to cleave IGFBP-5. Cleavage of Recombinant Human IGFBP‑5 (Catalog # 875-B5) by Recombinant Human Pappalysin‑2/PAPP‑A2 is detectable by SDS-PAGE stained by Coomassie, as measured under the described conditions.
Source
Mouse myeloma cell line, NS0-derived human Pappalysin-2/PAPP-A2 protein
Ser234-Cys1396, with a C-terminal 10-His tag
Accession #
N-terminal Sequence
Ser234
Protein/Peptide Type
Recombinant Enzymes
Gene
PAPPA2
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Note
<1.0 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Dilutions
  • Enzyme Activity
Theoretical MW
130 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.
SDS-PAGE
168 kDa, reducing conditions
Publications
Read Publications using
1668-ZN in the following applications:

Packaging, Storage & Formulations

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.
Buffer
Supplied as a 0.2 μm filtered solution in Tris, NaCl and CaCl2.
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Assay Procedure
  • Assay Buffer: 50 mM Tris, pH 8.0
  • Recombinant Human Pappalysin-2/PAPP-A2 (rhPappalysin-2) (Catalog # 1668-ZN)
  • Recombinant Human IGFBP‑5 (rhIGFBP-5) (Catalog # 875-B5)
  • 15% SDS-PAGE gel
  • Reducing SDS-PAGE gel buffer
  • SDS-PAGE or Western Blot
  1. Dilute rhPappalysin-2 to 40 µg/mL in Assay Buffer.
  2. Dilute rhIGFBP-5 to 200 µg/mL in Assay Buffer (Note: Acetonitrile interferes with assay, dry down rhIGFBP-5 and reconstitute at 200 µg/mL with Assay Buffer if necessary).
  3. Combine equal volumes of 40 µg/mL rhPappalysin-2 and 200 µg/mL rhIGFBP-5 for a 1:23.5 ratio of enzyme to Substrate. Include two blank controls containing Assay Buffer in place of rhPappalysin-2.
  4. Incubate reaction vials and one control at 37 °C overnight. Keep the other control at -20 °C during the overnight incubation period.
  5. Combine 20 µL from each reaction vial with 20 µL reducing SDS-PAGE gel buffer.
  6. Analyze the cleavage by SDS PAGE (load 40 µL/lane) followed by protein staining and/or Western blot.
Per Lane:
  • rhPappalysin-2: 0.4 µg
  • rhIGFBP-5: 2.0 µg

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human Pappalysin-2/PAPP-A2 Protein, CF

  • EC 3.4.24.-
  • PAPPA2
  • PAPP-A2
  • PAPP-A2pappalysin-2
  • pappalysin 2
  • Pappalysin2
  • Pappalysin-2
  • PAPPE
  • PAPP-E
  • PLAC3
  • placenta-specific 3
  • pregnancy-associated plasma preproprotein-A2
  • Pregnancy-associated plasma protein A2
  • Pregnancy-associated plasma protein E1

Background

Pappalysins belong to a fifth family of metzincins that consists of ADAMs/ADAMTSs, MMPs, astacins and serrylysins (1, 2). PAPP-A is an important pregnancy protein and increases in plasma by a factor of about 150 during pregnancy as compared to the nonpregnant state. PAPP-A is also a major marker of Down syndrome in the first trimester of pregnancy because maternal serum levels of PAPP-A are significantly reduced when a fetus affected by Down syndrome is present (3). 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 (4). Compared to PAPP‑A, PAPP-A2 (also called PAPP‑E), the second member of the family is less characterized. PAPP-A2 shares 45% amino acid identity to PAPP-A in the mature form, which is synthesized as a preproprotein consisting of multiple domains (1). The prepro region (residues 1‑233) and the C-terminal region (residues 1397‑1791) are not included in recombinant human PAPP-A2. As an active protease, recombinant human PAPP-A2 cleaves IGFBP-5 under the conditions described in Activity Assay Protocol.

  1. Overgaard, M.T. et al. (2001) J. Biol. Chem. 276:21849.
  2. Boldt, H.B. et al. (2001) Biochem. J. 358:359.
  3. Fialova L. and I.M. Malbohan (2002) Bratisl. Lek. Listy 103:194.
  4. Laursen, L.S. et al. (2001) FEBS Lett. 504:36.

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Publications for Pappalysin-2/PAPP-A2 (1668-ZN)(4)

We have publications tested in 2 confirmed species: Human, N/A.

We have publications tested in 4 applications: Antibody Absorption, Bioassay, ELISA (Standard), Western Blot.


Filter By Application
Antibody Absorption
(1)
Bioassay
(2)
ELISA (Standard)
(1)
Western Blot
(2)
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Human
(3)
N/A
(1)
All Species

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Bioinformatics

Gene Symbol PAPPA2
Uniprot