Human Pappalysin-1/PAPP-A Antibody

(3 citations)   
  • Species Reactivity
    Human
  • Specificity
    Detects human Pappalysin‑1/PAPP‑A in direct ELISAs and Western blots. In direct ELISAs and Western blots, less than 5% cross-reactivity with recombinant human PAPP-A2 is observed.
  • Source
    Polyclonal Goat IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human Pappalysin‑1/PAPP‑A
    Glu82-Asp1214
    Accession # Q13219
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
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.
Data Examples
Detection of Human Pappalysin‑1/
PAPP‑A by Western Blot.
Western blot shows lysate of human pregnant sera. PVDF membrane was probed with 0.1 µg/mL of Goat Anti-Human Pappalysin‑1/PAPP‑A Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2487) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF017). A specific band was detected for Pappalysin‑1/PAPP‑A at approximately 200 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.2 mg/mL in sterile PBS.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • 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.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Pappalysin-1/PAPP-A

Pappalysins belong to a fifth family of metzincins that consists of ADAMs/ADAMTSs, MMPs, astacins and serrylysins (1). 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 (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). Lack of IGFBP-4 cleavage in embryonic fibroblasts derived from PAPP-A knockout mice indicates that PAPP-A functions as a physiological IGFBP-4 protease (4). Three Lin12-Notch repeats (LNR) in the PAPP-A protein bind Ca2+ and are required for the cleavage of IGFBP-4, not IGFBP-5, by PAPP-A (5). The C-terminal LNR (residues 1476 to 1503) is not present in rhPAPP-A (residues 82 to 1214), which starts at the N-terminus of the mature chain and ends before the five Sushi (SCR) modules. As an active protease, rhPAPP-A cleaves IGFBP-5, which can be inhibited by 1,10-phenanthroline.

  • References:
    1. Boldt, H.B. et al. (2001) Biochem. J. 358:359.
    2. Fialova L. and I.M. Malbohan (2002) Bratisl. Lek. Listy 103:194.
    3. Laursen, L.S. et al. (2001) FEBS Lett. 504:36.
    4. Conover, C.A. et al. (2004) Development 131:1187.
    5. Boldt, H.B. et al. (2004) J. Biol. Chem. 279:38525.
  • Long Name:
    Pregnancy-associated Plasma Protein 1
  • Entrez Gene IDs:
    5069 (Human)
  • Alternate Names:
    ASBABP2; DIPLA1; EC 3.4.24.79; 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
Related Research Areas
Citations:

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

3 Citations: Showing 1 - 3
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Species
Applications
Sample Type
  1. Altered Biomarkers in Trophoblast Cells Obtained Noninvasively Prior to Clinical Manifestation of Perinatal Disease
    Sci Rep, 2016;6(0):32382.
    Species: Human
    Sample Type: Whole Cells
    Application: IHC - Not specified
  2. 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.
    Species: Human
    Sample Type: Serum
    Application: WB
  3. 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.
    Species: Human
    Sample Type: Tissue Homogenates
    Application: WB
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