| Applications: |
ELISA |
| Reactivity: |
Human |
| Note: |
STRICTLY FOR FURTHER SCIENTIFIC RESEARCH USE ONLY (RUO). MUST NOT TO BE USED IN DIAGNOSTIC OR THERAPEUTIC APPLICATIONS. |
| Sensitivity: |
0.119ng/mL |
| Detection Limit: |
0.312-20ng/mL |
| Short Description: |
This TAPA1 Sandwich ELISA Kit is an in-vitro enzyme-linked immunosorbent assay for the measurement of samples in human cell culture supernatant, serum and plasma (EDTA, citrate, heparin). |
| Storage Instruction: |
Store the unopened kit in the fridge at 2-8°C for up to 6 months. Once opened store individual kit contents according to components table provided with the kit. |
| Assay Time: |
4.5 hrs |
| Gene Symbol: |
CD81 |
| Gene ID: |
975 |
| Uniprot ID: |
CD81_HUMAN |
| Sample Type: |
serum, plasma, tissue homogenates or other biological fluids. |
| Tissue Specificity | Expressed on B cells (at protein level). Expressed in hepatocytes (at protein level). Expressed in monocytes/macrophages (at protein level). Expressed on both naive and memory CD4-positive T cells (at protein level). |
| Post Translational Modifications | Not glycosylated. Likely constitutively palmitoylated at low levels. Protein palmitoylation is up-regulated upon coligation of BCR and CD9-C2R-CD81 complexes in lipid rafts. |
| Function | Structural component of specialized membrane microdomains known as tetraspanin-enriched microdomains (TERMs), which act as platforms for receptor clustering and signaling. Essential for trafficking and compartmentalization of CD19 receptor on the surface of activated B cells. Upon initial encounter with microbial pathogens, enables the assembly of CD19-CR2/CD21 and B cell receptor (BCR) complexes at signaling TERMs, lowering the threshold dose of antigen required to trigger B cell clonal expansion and antibody production. In T cells, facilitates the localization of CD247/CD3 zeta at antigen-induced synapses with B cells, providing for costimulation and polarization toward T helper type 2 phenotype. Present in MHC class II compartments, may also play a role in antigen presentation. Can act both as positive and negative regulator of homotypic or heterotypic cell-cell fusion processes. Positively regulates sperm-egg fusion and may be involved in acrosome reaction. In myoblasts, associates with CD9 and PTGFRN and inhibits myotube fusion during muscle regeneration. In macrophages, associates with CD9 and beta-1 and beta-2 integrins, and prevents macrophage fusion into multinucleated giant cells specialized in ingesting complement-opsonized large particles. Also prevents the fusion of mononuclear cell progenitors into osteoclasts in charge of bone resorption. May regulate the compartmentalization of enzymatic activities. In T cells, defines the subcellular localization of dNTPase SAMHD1 and permits its degradation by the proteasome, thereby controlling intracellular dNTP levels. Also involved in cell adhesion and motility. Positively regulates integrin-mediated adhesion of macrophages, particularly relevant for the inflammatory response in the lung. (Microbial infection) Acts as a receptor for hepatitis C virus (HCV) in hepatocytes. Association with CLDN1 and the CLDN1-CD81 receptor complex is essential for HCV entry into host cell. (Microbial infection) Involved in SAMHD1-dependent restriction of HIV-1 replication. May support early replication of both R5- and X4-tropic HIV-1 viruses in T cells, likely via proteasome-dependent degradation of SAMHD1. (Microbial infection) Specifically required for Plasmodium falciparum infectivity of hepatocytes, controlling sporozoite entry into hepatocytes via the parasitophorous vacuole and subsequent parasite differentiation to exoerythrocytic forms. |
| Protein Name | Cd81 Antigen26 Kda Cell Surface Protein Tapa-1Target Of The Antiproliferative Antibody 1Tetraspanin-28Tspan-28Cd Antigen Cd81 |
| Database Links | Reactome: R-HSA-198933Reactome: R-HSA-977606 |
| Cellular Localisation | Cell MembraneMulti-Pass Membrane ProteinBasolateral Cell MembraneAssociates With Cldn1 And The Cldn1-Cd81 Complex Localizes To The Basolateral Cell Membrane |
| Alternative ELISA Names | Cd81 Antigen ELISA kit26 Kda Cell Surface Protein Tapa-1 ELISA kitTarget Of The Antiproliferative Antibody 1 ELISA kitTetraspanin-28 ELISA kitTspan-28 ELISA kitCd Antigen Cd81 ELISA kitCD81 ELISA kitTAPA1 ELISA kitTSPAN28 ELISA kit |
| output | |
Information sourced from Uniprot.org
12 months for antibodies. 6 months for ELISA Kits. Please see website T&Cs for further guidance
