Human Pappalysin-2/PAPP-A2 Antibody
Human Pappalysin-2/PAPP-A2 Antibody Summary
Accession # Q9BXP8
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
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.
- Overgaard, M.T. et al. (2001) J. Biol. Chem. 276:21849.
- Boldt, H.B. et al. (2001) Biochem. J. 358:359.
- Fialova L. and I.M. Malbohan (2002) Bratisl. Lek. Listy 103:194.
- Laursen, L.S. et al. (2001) FEBS Lett. 504:36.
Citations for Human Pappalysin-2/PAPP-A2 Antibody
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IGFBP-4 and -5 are expressed in first-trimester villi and differentially regulate the migration of HTR-8/SVneo cells.
Authors: Crosley, Erin J, Dunk, Caroline, Beristain, Alexande, Christians, Julian K
Reprod Biol Endocrinol, 2015;12(0):123.
Sample Types: Whole Tissue
Expression of pregnancy-associated plasma protein A2 during pregnancy in human and mouse.
Authors: Wang J, Qiu Q, Haider M, Bell M, Gruslin A, Christians JK
J. Endocrinol., 2009;202(3):337-45.
Sample Types: Serum
Applications: Western Blot
Increased levels of pregnancy-associated plasma protein-A2 in the serum of pre-eclamptic patients.
Authors: Nishizawa H, Pryor-Koishi K, Suzuki M
Mol. Hum. Reprod., 2008;14(10):595-602.
Sample Types: Serum
Applications: ELISA Development
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