Rabbit Polyclonal VAPA antibody. Suitable for IHC-P, IP, WB and reacts with Human, Mouse samples. Immunogen corresponding to Synthetic Peptide within Human VAPA aa 100-200.
Images
Key facts
- Isotype
- IgG
- Host species
- Rabbit
- Storage buffer
pH: 7 - 8
Preservative: 0.09% Sodium azide
Constituents: Tris citrate/phosphate- Form
- Liquid
- Clonality
- Polyclonal
Immunogen
- Synthetic Peptide within Human VAPA aa 100-200. The exact immunogen used to generate this antibody is proprietary information. Database link Q9P0L0
Reactivity data
Select an application| IHC-P | IP | WB | |
|---|---|---|---|
| Human | Tested | Tested | Tested |
| Mouse | Expected | Expected | Tested |
| Orangutan | Predicted | Predicted | Predicted |
IHC-P
TestedTested
| Species | Dilution info | Notes |
|---|---|---|
Species Human | Dilution info 1/500.00000 - 1/2000.00000 | Notes Perform heat-mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol. |
ExpectedExpected
| Species | Dilution info | Notes |
|---|---|---|
Species Mouse | Dilution info Use at an assay dependent concentration. | Notes - |
PredictedPredicted
| Species | Dilution info | Notes |
|---|---|---|
Species Orangutan | Dilution info - | Notes - |
IP
TestedTested
| Species | Dilution info | Notes |
|---|---|---|
Species Human | Dilution info 2.00000-10.00000 µg/mg of lysate | Notes - |
ExpectedExpected
| Species | Dilution info | Notes |
|---|---|---|
Species Mouse | Dilution info Use at an assay dependent concentration. | Notes - |
PredictedPredicted
| Species | Dilution info | Notes |
|---|---|---|
Species Orangutan | Dilution info - | Notes - |
WB
TestedTested
| Species | Dilution info | Notes |
|---|---|---|
Species Human | Dilution info 1/1000.00000 - 1/5000.00000 | Notes - |
Species Mouse | Dilution info 1/1000.00000 - 1/5000.00000 | Notes - |
PredictedPredicted
| Species | Dilution info | Notes |
|---|---|---|
Species Orangutan | Dilution info - | Notes - |
Associated Products
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Target data
Function
Endoplasmic reticulum (ER)-anchored protein that mediates the formation of contact sites between the ER and endosomes via interaction with FFAT motif-containing proteins such as STARD3 or WDR44 (PubMed:32344433, PubMed:33124732). STARD3-VAPA interaction enables cholesterol transfer from the ER to endosomes (PubMed:33124732). Via interaction with WDR44 participates in neosynthesized protein export (PubMed:32344433). In addition, recruited to the plasma membrane through OSBPL3 binding (PubMed:25447204). The OSBPL3-VAPA complex stimulates RRAS signaling which in turn attenuates integrin beta-1 (ITGB1) activation at the cell surface (PubMed:25447204). With OSBPL3, may regulate ER morphology (PubMed:16143324). May play a role in vesicle trafficking (PubMed:11511104, PubMed:19289470).
Alternative names
VAP33, VAPA, Vesicle-associated membrane protein-associated protein A, VAMP-A, VAMP-associated protein A, VAP-A, 33 kDa VAMP-associated protein, VAP-33
Recommended products
Rabbit Polyclonal VAPA antibody. Suitable for IHC-P, IP, WB and reacts with Human, Mouse samples. Immunogen corresponding to Synthetic Peptide within Human VAPA aa 100-200.
Key facts
- Isotype
- IgG
- Host species
- Rabbit
- Storage buffer
pH: 7 - 8
Preservative: 0.09% Sodium azide
Constituents: Tris citrate/phosphate- Form
- Liquid
- Clonality
- Polyclonal
- Immunogen
- Synthetic Peptide within Human VAPA aa 100-200. The exact immunogen used to generate this antibody is proprietary information. Database link Q9P0L0
- Purification technique
- Affinity purification Immunogen
- Concentration
Storage
- Shipped at conditions
- Blue Ice
- Appropriate short-term storage duration
- 1-2 weeks
- Appropriate short-term storage conditions
- +4°C
- Appropriate long-term storage conditions
- -20°C
- Aliquoting information
- Upon delivery aliquot
- Storage information
- Avoid freeze / thaw cycle
Notes
Abcam is leading the way to address reproducibility in scientific research with our highly validated recombinant monoclonal and recombinant multiclonal antibodies. Search & select one of Abcam's thousands of recombinant alternatives to eliminate batch-variability and unnecessary animal use.
If you do not find a host species to meet your needs, our catalogue and custom Chimeric range provides scientists the specificity of Abcam's RabMAbs in the species backbone of your choice. Remember to also review our range of edited cell lines, proteins and biochemicals relevant to your target that may help you further your research goals.
Abcam antibodies are extensively validated in a wide range of species and applications, so please check the reagent specifications meet your scientific needs before purchasing. If you have any questions or bespoke requirements, simply visit the Contact Us page to send us an inquiry or contact our Support Team ahead of purchase.
Supplementary info
- This supplementary information is collated from multiple sources and compiled automatically.
- Activity summary
Vesicle-associated membrane protein-associated protein A (VAPA) also known as VAP-A is an integral membrane protein involved in intracellular membrane trafficking. It has a molecular weight of approximately 33 kDa and is expressed in multiple tissues including the brain liver and muscles. Mechanically VAPA functions in the process of vesicle docking and fusion at membranes which is essential for the trafficking of proteins and lipids within cells. This protein is also a part of the endoplasmic reticulum (ER) and contributes to the formation of membrane contact sites between the ER and other organelles.
- Biological function summary
In the cellular environment VAPA plays an important role in maintaining homeostasis by regulating lipid transport and metabolism. It forms a complex with several other proteins such as OSBP (oxysterol-binding protein) and CERT (ceramide transport protein) which facilitates the exchange of lipids between the ER and the Golgi apparatus. This interaction underlines VAPA’s role in lipid droplet dynamics and the synthesis of phosphatidylinositols which are critical for cell signaling and membrane integrity.
- Pathways
The involvement of VAPA is significant in lipid metabolism and membrane trafficking pathways. It interacts with proteins like VAMP (vesicle-associated membrane proteins) and SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) complexes which are important for exocytosis and endocytosis processes. VAPA's interaction in these pathways supports the movement of materials across cellular membranes and its regulation of lipid exchange impacts the signaling pathways influencing cell growth and differentiation.
- Associated diseases and disorders
Abnormal VAPA function relates to neurodegenerative diseases such as amyotrophic lateral sclerosis (ALS) and some forms of motor neuron disease. In such conditions VAPA’s interaction with proteins like TDP-43 (TAR DNA-binding protein 43) becomes disrupted leading to protein aggregation and neuronal toxicity. Additionally disruptions in VAPA-associated lipid transport are linked to metabolic disorders like type 2 diabetes highlighting its critical role in proper cellular communication and metabolic balance.
Product promise
Tested
We have tested this species and application combination and it works. It is covered by our product promise.
Expected
We have not tested this specific species and application combination in-house, but expect it will work. It is covered by our product promise.
Predicted
This species and application combination has not been tested, but we predict it will work based on strong homology. However, this combination is not covered by our product promise.
Not recommended
We do not recommend this combination. It is not covered by our product promise.
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3 product images
Western blot - Anti-VAPA antibody (ab225890)
All lanes: Western blot - Anti-VAPA antibody (ab225890) at 0.4 µg/mL
Lane 1: HeLa (human epithelial cell line from cervix adenocarcinoma) whole cell lysate prepared using NETN lysis buffer at 50 µg
Lane 2: HeLa whole cell lysate prepared using RIPA lysis buffer at 50 µg
Lane 3: HEK-293T (human epithelial cell line from embryonic kidney transformed with large T antigen) whole cell lysate prepared using NETN lysis buffer at 50 µg
Lane 4: Jurkat (human T cell leukemia cell line from peripheral blood) whole cell lysate prepared using NETN lysis buffer at 50 µg
Lane 5: TCMK-1 (mouse kidney epithelial cell line) whole cell lysate prepared using NETN lysis buffer at 50 µg
Developed using the ECL technique.
Predicted band size: 28 kDa
Exposure time: 30s
Immunoprecipitation - Anti-VAPA antibody (ab225890)
VAPA was immunoprecipitated from HEK-293T (human epithelial cell line from embryonic kidney transformed with large T antigen) whole cell lysate (prepared using NETN buffer; 1 mg for IP, 20% of IP loaded) with ab225890 at 6 μg/mg lysate. Western blot was performed from the immunoprecipitate using ab225890 at 1 μg/ml.
Lane 1: ab225890 IP in HeLa whole cell lysate.
Lane 2: Control IgG IP in HeLa whole cell lysate.
Detection: Chemiluminescence with exposure time of 3 minutes.
All lanes: Immunoprecipitation - Anti-VAPA antibody (ab225890)
Predicted band size: 28 kDa
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-VAPA antibody (ab225890)
Formalin-fixed, paraffin-embedded human breast carcinoma tissue stained for VAPA using ab225890 at 1/1000 dilution in immunohistochemical analysis.
Detection: DAB staining.
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