| Field | Specification |
|---|---|
| Mfr No | |
| Alternative Names | Vacuolar protein sorting-associated protein 4A; Protein SKD2; VPS4-1; hVPS4; VPS4A; VPS4 |
| Cellular Localization | |
| Clonality | |
| Concentration | |
| Host | |
| Immunogen | E.coli-derived human VPS4A recombinant protein (Position: M1-K71). |
| Isotype | |
| Molecular Weight | |
| Product Type | |
| Reactivity | |
| Reconstitution | |
| Target | |
| UniProt # |
Overview
Anti-VPS4A Antibody Picoband® is an antibody for VPS4A detection raised in Rabbit (Polyclonal, Rabbit IgG), with reported reactivity: Human,Mouse,Rat. Commonly used in WB, IHC, Flow Cytometry, ELISA workflows.
Key elements and design rationale
- Target: VPS4A (vacuolar protein sorting 4 homolog A); UniProt: Q9UN37
- Antibody format: Rabbit, Polyclonal, Rabbit IgG
- Molecular weight: 50 kDa
- Applications: WB, IHC, Flow Cytometry, ELISA
Vendor description (summary): Boster Bio Anti-VPS4A Antibody Picoband® catalog # A03216-1.
Biological background
Biological context: Involved in late steps of the endosomal multivesicular bodies (MVB) pathway. Recognizes membrane-associated ESCRT-III assemblies and catalyzes their disassembly, possibly in combination with membrane fission. Redistributes the ESCRT-III components to the cytoplasm for further rounds of MVB sorting. MVBs contain intraluminal vesicles (ILVs) that are generated by invagination and scission from the limiting membrane of the endosome and mostly are delivered to lysosomes enabling degradation of membrane proteins, such as stimulated growth factor receptors, lysosomal enzymes and lipids. In conjunction with the ESCRT machinery also appears to function in topologically equivalent membrane fission events, such as the terminal stages of cytokinesis and enveloped virus budding (HIV-1 and other lentiviruses). Involved in cytokinesis: retained at the midbody by ZFYVE19/ANCHR and CHMP4C until abscission checkpoint signaling is terminated at late cytokinesis. It is then released following dephosphorylation of CHMP4C, leading to abscission (PubMed:24814515). VPS4A/B are required for the exosomal release of SDCBP, CD63 and syndecan.
Expression and localization notes: cellular localization: Late endosome membrane. Peripheral membrane protein. Prevacuolar compartment membrane. Midbody., tissue context: Ubiquitously expressed..
Common research applications
- Western blotting (WB): Compare VPS4A levels across samples and conditions using appropriate loading and biological controls.
- Immunohistochemistry (IHC): Evaluate spatial distribution of VPS4A in tissue sections, considering fixation and antigen retrieval effects.
- Flow cytometry: Quantify VPS4A-positive populations in single-cell suspensions with appropriate gating and controls.
- ELISA: Use antibody-based detection formats to assess antigen presence or binding in plate-based assays.
Notes for experimental interpretation
- Account for isoforms, post-translational modifications, and sample-specific processing that can shift apparent molecular weight or epitope accessibility.
- Use positive/negative biological controls where possible (e.g., known-expressing cells/tissues, knockdown/knockout models) and include appropriate secondary-only/isotype controls for imaging workflows.
Additional product notes (from provided fields)
- Specificity: No cross reactivity with other proteins.
- Background: Vacuolar protein sorting-associated protein 4A is a protein that in humans is encoded by the VPS4A gene. It is mapped to 16q22.1. The protein encoded by this gene is a member of the AAA protein family (ATPases associated with diverse cellular activities), and is the homolog of the yeast Vps4 protein. In humans, two paralogs of the yeast protein have been identified. The former share a high degree of aa sequence similarity with each other, and also with yeast Vps4 and mouse Skd1 proteins. The mouse Skd1 (suppressor of K+ transport defect 1) has been shown to be really an yeast Vps4 ortholog. Functional studies indicate that both human paralogs associate with the endosomal compartments, and are involved in intracellular protein trafficking, similar to Vps4 protein in yeast. The gene encoding this paralog has been mapped to chromosome 16; the gene for the other resides on chromosome 18.
- Cross reactivity: No cross-reactivity with other proteins.
- Cellular localization: Late endosome membrane. Peripheral membrane protein. Prevacuolar compartment membrane. Midbody.
- Tissue details: Ubiquitously expressed.
- Research category: Signal Transduction
Customization & Add-ons: Can’t find the antibody you need—or require a custom format for your assay? We can help you source the best match or support custom antibody solutions for diverse research needs, including species and isotype selection, conjugations and labeling (e.g., HRP/AP, biotin, fluorophores), purification grade options (Protein A/G, affinity purified), formulation preferences (buffer selection, carrier-free, glycerol-free), custom concentrations and aliquoting, low-endotoxin options for cell-based work, and application-focused QC/validation support (project dependent). Click Talk to a Scientist to submit a request, email us at support@biohippo.com, or explore our Research Services for additional support—our team will follow up with feasibility details and next steps.
