Human VAP-A Antibody

Catalog # Availability Size / Price Qty
Detection of Human VAP-A by Western Blot.
2 Images
Product Details
Citations (2)
Supplemental Products

Human VAP-A Antibody Summary

Species Reactivity
Detects human VAP‑A in direct ELISAs and Western blots. In direct ELISAs, no cross-reactivity with recombinant human VAP-B or recombinant rat VAP-B is observed.
Monoclonal Mouse IgG2A Clone # 604101
Protein A or G purified from hybridoma culture supernatant
E. coli-derived recombinant human VAP-A
Accession # Q9P0L0
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
2 µg/mL
See below
8-25 µg/mL
See below

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.

Scientific Data

Western Blot Detection of Human VAP-A antibody by Western Blot. View Larger

Detection of Human VAP-A by Western Blot. Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line. PVDF Membrane was probed with 2 µg/mL of Mouse Anti-Human VAP-A Monoclonal Antibody (Catalog # MAB5820) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for VAP-A at approximately 33 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1with 0.05% Tween 20.

Immunohistochemistry VAP-A antibody in Human Brain by Immunohistochemistry (IHC-P). View Larger

VAP‑A in Human Brain. VAP-A was detected in immersion fixed paraffin-embedded sections of human brain using Mouse Anti-Human VAP-A Monoclonal Antibody (Catalog # MAB5820) at 15 µg/mL overnight at 4 °C. Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). Specific staining was localized to neuronal cell bodies and processes. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

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.


Preparation and Storage

Reconstitute at 0.5 mg/mL in sterile PBS.
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: VAP-A

Vesicle-associated membrane protein (VAMP)-associated protein A (VAP-A; also VAMP-A and VAP-33) is a 33 kDa, ubiquitously expressed, type IV transmembrane protein belonging to the VAP family of proteins (1). It is found in plasma and ER membranes as well as in intracellular vesicles as a homodimer and a heterodimer with VAP-B. Human VAP-A is synthesized as a 249 amino acid (aa) precursor that contains a 227 aa cytoplasmic domain and a 21 aa transmembrane region. The cytoplasmic domain contains a mobile sperm protein (MSP) domain (aa 13-131) and a coiled-coil region (aa 169-205). Human VAP-A is 97% aa identical to mouse and rat VAP-A. VAP-A and VAP-B recruit FFAT (two phenylalanines in an acidic tract)-motif-containing proteins to the cytosolic surface of ER membranes through a conserved region within their MSP domain, and they have been implicated in regulation of membrane transport, phospholipid biosynthesis, and the unfolded protein response (2, 3). Their ability to interact with lipid-transfer/binding proteins (LT/BPs) may affect the lipid composition of certain cellular membranes (2, 4). VAPs play a critical role in maintaining the structural and functional properties of the Golgi complex (2). Knockdown of VAP reduces the levels of phosphatidylinositol‑4‑phosphate (PI4P), diacylglycerol (DAG), and sphingomyelin (SM) in Golgi membranes and exports pleiotropic effects in Golgi-mediated transport (2). The effects of VAPs are mediated by their interacting FFAT-motif-containing proteins Nir2, OSBP, and CERT (2). VAPs provide a scaffold for these LT/BPs at the ER-Golgi membrane contact sites, thereby affecting the lipid composition of the Golgi membranes and consequently their structural and functional identities (2). VAP-A associates with and regulates the neurite outgrowth-promoting activity of protrudin, a protein that promotes neurite formation (5).

  1. Weir, M.L. et al. (1998) Biochem. J. 333:247.
  2. Peretti, D. et al. (2008) Mol. Biol. Cell 19:3871.
  3. Kaiser, S.E. et al. (2005) Structure 13:1035.
  4. Loewen, C.J. et al. (2003) EMBO J. 22:2025.
  5. Saita, S. et al. (2009) J. Biol. Chem. 284:13766.
    Long Name
    VAMP [Vesicle-associated Membrane Protein]-associated Protein A
    Entrez Gene IDs
    9218 (Human); 30960 (Mouse); 58857 (Rat)
    Alternate Names
    hVAP-33; MGC3745,33 kDa VAMP-associated protein; VAMP (vesicle-associated membrane protein)-associated protein A, 33kDa; VAMP-A; VAP-33; VAP33VAMP (vesicle-associated membrane protein)-associated protein A (33kD); VAPA; VAP-A; VAP-AVAMP-associated protein A; vesicle-associated membrane protein-associated protein A

    Product Datasheets

    You must select a language.


    Citations for Human VAP-A Antibody

    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.

    2 Citations: Showing 1 - 2
    Filter your results:

    Filter by:

    1. NPC1 regulates ER contacts with endocytic organelles to mediate cholesterol egress
      Authors: D Höglinger, T Burgoyne, E Sanchez-He, P Hartwig, A Colaco, J Newton, CE Futter, S Spiegel, FM Platt, ER Eden
      Nat Commun, 2019-09-19;10(1):4276.
      Species: Human
      Sample Types: Cell Lysates
      Applications: Western Blot
    2. VAMP associated proteins are required for autophagic and lysosomal degradation by promoting a PtdIns4P-mediated endosomal pathway
      Authors: D Mao, G Lin, B Tepe, Z Zuo, KL Tan, M Senturk, S Zhang, BR Arenkiel, M Sardiello, HJ Bellen
      Autophagy, 2019-02-20;0(0):.
      Species: Human
      Sample Types: Whole Cells
      Applications: ICC


    No product specific FAQs exist for this product, however you may

    View all Antibody FAQs

    Reviews for Human VAP-A Antibody

    There are currently no reviews for this product. Be the first to review Human VAP-A Antibody and earn rewards!

    Have you used Human VAP-A Antibody?

    Submit a review and receive an Amazon gift card.

    $25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image

    $10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

    Submit a Review