Human VAP‑A Alexa Fluor™ Plus 680‑conjugated Antibody

R&D Systems | Catalog # AF5820AFP680

R&D Systems

Key Product Details

Species Reactivity

Human

Applications

Western Blot

Label

Alexa Fluor Plus 680 (Excitation = 687 nm, Emission = 704 nm)

Antibody Source

Polyclonal Sheep IgG
View all VAP-A Primary Antibodies »

Product Specifications

Specificity

Detects human VAP-A in direct ELISAs and Western blots. In direct ELISAs, less than 1% cross-reactivity with recombinant human VAP-B and recombinant rat VAP-B is observed.

Clonality

Polyclonal

Host

Sheep

Isotype

IgG

Applications for Human VAP‑A Alexa Fluor™ Plus 680‑conjugated Antibody

Application
Recommended Usage

Western Blot

Optimal dilution of this antibody should be experimentally determined.

Formulation, Preparation, and Storage

Formulation

Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Protect from light. Do not freeze. 12 months from date of receipt, 2 to 8 °C as supplied

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 role in maintaining the identities of intracellular organelles has not been demonstrated, but their ability to interact with lipid-transfer/binding proteins (LT/BPs) may affect the lipid composition of certain cellular membranes (2, 4). One study shows that VAPs play a critical role in maintaining the structural and functional properties of the Golgi complex (2). Researchers found that 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). Most recently, researchers found that VAP-A associates and co-localizes with protrudin, a protein that promotes neurite formation, and found that it was an important regulator both of the subcellular localization of protrudin and of its ability to stimulate neurite outgrowth (5).

References

  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

    Alternate Names

    VAMP-A, VAP-33, VAPA

    Entrez Gene IDs

    9218 (Human); 30960 (Mouse); 58857 (Rat)

    Gene Symbol

    VAPA

    UniProt

    Q9P0L0 (Human)

    Additional VAP-A Products

    Product Documents for Human VAP‑A Alexa Fluor™ Plus 680‑conjugated Antibody

    Certificate of Analysis

    To download a Certificate of Analysis, please enter a lot or batch number in the search box below.

    Note: Certificate of Analysis not available for kit components.

    Product Specific Notices for Human VAP‑A Alexa Fluor™ Plus 680‑conjugated Antibody


    This product is provided under an intellectual property license from Life Technologies Corporation. The transfer of this product is conditioned on the buyer using the purchased product solely in research conducted by the buyer, excluding contract research or any fee for service research, and the buyer must not (1) use this product or its components for (a) diagnostic, therapeutic or prophylactic purposes; (b) testing, analysis or screening services, or information in return for compensation on a per-test basis; or (c) manufacturing or quality assurance or quality control, and/or (2) sell or transfer this product or its components for resale, whether or not resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5781 Van Allen Way, Carlsbad, CA 92008 USA or outlicensing@thermofisher.com.

    For research use only

    Customer Reviews

    There are currently no reviews for this product. Be the first to review Human VAP‑A Alexa Fluor™ Plus 680‑conjugated Antibody and earn rewards!

    Have you used Human VAP‑A Alexa Fluor™ Plus 680‑conjugated Antibody?

    Submit a review and receive an Amazon gift card!

    $25/€18/£15/$25CAN/¥2500 Yen for a review with an image

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

    Submit a review
    Amazon Gift Card

    FAQs

    No product specific FAQs exist for this product.

    View all FAQs for Antibodies