Human CD74 ELISA Kit is a Sandwich (quantitative) ELISA kit for the measurement of Human CD74 in Human in Cell culture supernatant, Plasma, Serum samples.
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Key facts
- Detection method
- Colorimetric
- Sample types
- Cell culture supernatant, Plasma, Serum
- Assay type
- Sandwich (quantitative)
- Reactive species
- Human
- Range
- 0.1 - 25 ng/mL
- Sensitivity
- = 0.1 ng/mL
Reactivity data
| Application | Reactivity | Dilution info | Notes |
|---|---|---|---|
Application sELISA | Reactivity Reacts | Dilution info - | Notes - |
Target data
Function
Plays a critical role in MHC class II antigen processing by stabilizing peptide-free class II alpha/beta heterodimers in a complex soon after their synthesis and directing transport of the complex from the endoplasmic reticulum to the endosomal/lysosomal system where the antigen processing and binding of antigenic peptides to MHC class II takes place. Serves as cell surface receptor for the cytokine MIF. Class-II-associated invariant chain peptide. Binds to the peptide-binding site of MHC class II alpha/beta heterodimers forming an alpha-beta-CLIP complex, thereby preventing the loading of antigenic peptides to the MHC class II complex until its release by HLA-DM in the endosome. Isoform p41. Stabilizes the conformation of mature CTSL by binding to its active site and serving as a chaperone to help maintain a pool of mature enzyme in endocytic compartments and extracellular space of antigen-presenting cells (APCs). Has antiviral activity by stymieing the endosomal entry of Ebola virus and coronaviruses, including SARS-CoV-2 (PubMed:32855215). Disrupts cathepsin-mediated Ebola virus glycoprotein processing, which prevents viral fusion and entry. This antiviral activity is specific to p41 isoform (PubMed:32855215).
Alternative names
CD74, DHLAG, HLA class II histocompatibility antigen gamma chain, HLA-DR antigens-associated invariant chain, Ia antigen-associated invariant chain, Ii
What's included?
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Human CD74 ELISA Kit is a Sandwich (quantitative) ELISA kit for the measurement of Human CD74 in Human in Cell culture supernatant, Plasma, Serum samples.
Key facts
- Detection method
- Colorimetric
- Sample types
- Cell culture supernatant, Plasma, Serum
- Assay type
- Sandwich (quantitative)
- Reactive species
- Human
- Range
- 0.1 - 25 ng/mL
- Assay Platform
- Pre-coated microplate (12 x 8 well strips)
- Sensitivity
- = 0.1 ng/mL
Recovery
Sample specific recovery
| Sample type | Average % | Range |
|---|---|---|
Sample type Serum | Average % = 117.2 | Range 108 - 126 % |
Sample type Plasma | Average % = 106.8 | Range 101 - 114 % |
Sample type Cell culture media | Average % = 103.2 | Range 93 - 111 % |
Storage
- Shipped at conditions
- Blue Ice
- Appropriate short-term storage conditions
- -20°C
- Appropriate long-term storage conditions
- -20°C
- Storage information
- -20°C
Notes
Human CD74 ELISA kit is an in vitro enzyme-linked immunosorbent assay for the quantitative measurement of human CD74 in serum, plasma and cell culture supernatants. This assay employs an antibody specific for human CD74 coated on a 96-well plate.
Supplementary info
- This supplementary information is collated from multiple sources and compiled automatically.
- Activity summary
CD74 also known as the invariant chain or li is a protein with a mass of about 33 kDa. It is widely expressed on the surface of immune cells such as B cells dendritic cells and macrophages. CD74 plays an important role in the immune system by acting as a chaperone for major histocompatibility complex class II (MHC II) molecules guiding their migration to endosomes where they encounter antigenic peptides. The CD74 protein also functions as a cell surface receptor for macrophage migration inhibitory factor (MIF) enhancing the immune response process.
- Biological function summary
CD74 facilitates multiple immune regulatory processes. It forms a complex with the MHC II molecules aiding in their proper folding and peptide loading in the endoplasmic reticulum. This complex then travels through the Golgi apparatus towards the lysosomal compartments where antigens are presented to initiate adaptive immune responses. In addition CD74 is involved in signal transduction pathways that regulate cell proliferation and survival influenced by interactions with MIF and other molecules.
- Pathways
The role of CD74 extends into both the antigen presentation and MIF signaling pathways. Within the antigen presentation pathway CD74's activity is tightly connected with MHC II and subsequently to CD4+ T cells facilitating the activation of these immune cells. The MIF signaling pathway involves CD74 interacting with CD44 a receptor that further propagates the signaling cascades essential for immune modulation and cell survival.
- Associated diseases and disorders
CD74 is linked to inflammatory and autoimmune conditions such as rheumatoid arthritis and systemic lupus erythematosus. Aberrant expression of CD74 influences the presentation of autoantigens and may contribute to the chronic inflammation seen in these disorders. Its connection to MIF which is a pro-inflammatory cytokine further implicates CD74 in these autoimmune scenarios by promoting persistent immune activation. Researchers are also exploring CD74 as a therapeutic target in certain cancers due to its influence on immune surveillance and tumor progression.
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1 product image
Sandwich ELISA - Human CD74 ELISA Kit (ab313527)
Example of standard curve using ab313527. This standard curve is for demonstrative purposes only. A standard curve must be run with each assay.
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Product protocols
- Visit the general protocols
- Visit troubleshooting
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