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Biotin-conjugated PD-L1/CD274 (C-terminal) Polyclonal antibody
PD-L1/CD274 (C-terminal) Polyclonal Antibody for IHC
Host / Isotype
Rabbit / IgG
Human, mouse, rat
Biotin Fluorescent Dye
Cat no : Biotin-28076
|Positive IHC detected in||human tonsillitis tissue, human placenta tissue|
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
|Immunohistochemistry (IHC)||IHC : 1:50-1:500|
|Sample-dependent, check data in validation data gallery|
Biotin-28076 targets PD-L1/CD274 (C-terminal) in IHC applications and shows reactivity with Human, mouse, rat samples.
|Tested Reactivity||Human, mouse, rat|
|Host / Isotype||Rabbit / IgG|
|Immunogen||PD-L1/CD274 (C-terminal) fusion protein Ag27557|
|Full Name||CD274 molecule|
|Calculated molecular weight||290 aa, 33 kDa|
|Observed molecular weight||45-50 kDa|
|GenBank accession number||BC074984|
|Gene ID (NCBI)||29126|
|Conjugate||Biotin Fluorescent Dye|
|Purification Method||Antigen affinity purification|
|Storage Buffer||PBS with 50% Glycerol, 0.05% Proclin300, 0.5% BSA, pH 7.3.|
|Storage Conditions||Store at -20°C. Avoid exposure to light. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.|
PD-L1, also known as CD274 or B7H1, stands for programmed cell death ligand 1. It is a type I transmembrane protein that is thought to repress immune responses by binding to its receptor (PD1), thus inhibiting T-cell activation, proliferation, and cytokine production. It contains V-like and C-like immunoglobulin domains. PD-L1 expression is regulated by various cytokines, such as TNF-α or LPS (ISSN: 1848-7718). Increased expression of this protein in certain types of cancers, e.g., renal cell carcinoma or colon cancer, correlates with poor prognosis.
What is the molecular weight of PD-L1?
Depending on the isoform, the calculated molecular weight of the protein varies between 20 and 33 kDa (176-290 aa).
What are the isoforms of PD-L1?
According to NCBI, three different isoforms have been identified. There are significant differences in the untranslated and protein coding regions.
What is the subcellular localization and tissue specificity of PD-L1?
It is predicted to localize in the plasma membrane of various cell types, with a particularly high expression in placental trophoblast and subsets of immune cells. High levels of PD-L1 protein have also been detected in lung and colon tissues.
What is the function of PD-L1 in immune responses?
PD-L1 is critical for the induction and maintenance of immune self-tolerance during infection or inflammation in normal tissues. The interaction of PD-L1 and its receptors is responsible for preventing auto-immune phenotypes and balancing the overall immune response in situations such as pregnancy or tissue allografts. The interaction between PD-L1 and PD-1 or B7.1 starts an inhibitory signaling cascade, which results in the decreased proliferation of antigen-specific T-cells and increased survival of regulatory T-cells (PMID: 15240681).
How can PD-L1's implication in cancer be used as a drug target?
In certain tumors, high expression of PD-L1 serves as a stop-sign to inhibit the recognition of cancer cells by T-cells (PMID: 23087408). The interaction between PD-L1 and its receptors (PD1 and B7.1) is a mechanism for the tumor to evade the host immune response (PMID: 29357948). Several mAbs have been developed to target that interaction and thus prevent the inactivation of cytotoxic T-cells by the tumor (PMIDs: 23890059, 18173375).