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HLA G Antibody (SR1708)

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Western Blot: HLA G Antibody (SR1708) [NBP3-21711] - Western blot analysis using NBP3-21711 in Jurkat cell lysate.

Product Details

Summary
Reactivity HuSpecies Glossary
Applications WB
Clone
SR1708
Clonality
Monoclonal
Host
Rabbit
Conjugate
Unconjugated

Order Details

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HLA G Antibody (SR1708) Summary

Additional Information
Recombinant Monoclonal Antibody
Immunogen
A synthesized peptide derived from human HLA G (Uniprot #: P17693)
Specificity
Detects endogenous levels of total HLA G
Isotype
IgG
Clonality
Monoclonal
Host
Rabbit
Gene
HLA-G
Purity
Affinity purified
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Western Blot 1:500-1:2000
Theoretical MW
42 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Packaging, Storage & Formulations

Storage
Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
Buffer
PBS, pH 7.4, 150mM NaCl, 50% glycerol.
Preservative
0.02% Sodium Azide
Purity
Affinity purified

Alternate Names for HLA G Antibody (SR1708)

  • b2 microglobulin
  • HLA class I histocompatibility antigen, alpha chain G
  • HLA class I molecule
  • HLA G antigen
  • HLA G
  • HLA-6.0
  • HLA-G histocompatibility antigen, class I, G
  • HLAG
  • HLA-G
  • major histocompatibility complex, class I, G
  • MHC Class I Antigen G
  • MHC class Ib antigen
  • MHC-G
  • mutant MHC class I antigen
  • mutant MHC class Ib antigen
  • sHLA-G
  • Soluble HLA class I histocompatibility antigen, alpha chain G

Background

Human leukocyte antigen (HLA)-G is a non-classical major histocompatibility complex (MHC) class I gene belonging to the HLA class I family. The HLA class I family is subdivided into the classical (HLA-Ia) antigens comprised of HLA-A, -B, and -C molecules and the nonclassical (HLA-Ib) group including the HLA-E, -F, and -G molecules. Seven different splice variants of HLA-G have been observed including four membrane isoforms (HLA-G1, HLA-G2, HLA-G3, and HLA-G4) and three soluble isoforms (HLA-G5, HLA-G6 and HLA-G7). Proteolytic processing of HLA-G1 by metalloproteinases (MMPs) such as MMP-2 produces the soluble isoform, shedding HLA-G1. The HLA-G1 and HLA-G5 isoforms share a similar confirmation to the classical MHC class I protein, consisting of three extracellular domains including alpha1, alpha2, and alpha3 associated with Beta-2-microglobulin (B2M). Other HLA-G variants are shorter, missing one or two of the globular domains and are not bound to B2M. HLA-G receptors include KIR2DL4 (CD158d), with the highest affinity for ILT2 (LILRB1, CD85j) and ILT4 (LILRB2, CD85d) (1,2).

Discovered in cytotrophoblasts, HLA-G is involved in fetal maternal immune tolerance and some studies have linked its downregulation with severe preeclampsia (3). HLA-G mediated immune suppression works by impeding cell proliferation, differentiation, cytotoxicity, cytokine secretion and chemotaxis; and activation of regulatory cells and MDSCs or M2 type macrophage. HLA-G is constitutively expressed in immune-privileged sites such as pancreatic islets, mesenchymal stem cells (MSCs) and the cornea. Upregulation of HLA-G occurs in pathological states including cancer, allo-transplantations, viral infections, autoimmune and inflammatory diseases (4). In cancer, HLA-G expression is induced by hypoxia and has been correlated with advanced tumor stage, tumor metastasis, and poor therapeutic response and survival. HLA-G is an attractive tumor associated-antigen (TAA) for immunotherapy and is considered a major immune checkpoint (ICP).

References

1. Loustau, M., Anna, F., Drean, R., Lecomte, M., Langlade-Demoyen, P., & Caumartin, J. (2020). HLA-G Neo-Expression on Tumors. Front Immunol, 11:1685. PMID: 32922387

2. Lin A, Yan WH. (2018) Heterogeneity of HLA-G Expression in Cancers: Facing the Challenges. Front Immunol. 9:2164. PMID: 30319626

3. Djurisic S, Hviid TV. (2014) HLA Class Ib Molecules and Immune Cells in Pregnancy and Preeclampsia. Front Immunol. 5:652. PMID: 25566263

4. Lila N, Rouas-Freiss N, Dausset J, Carpentier A, Carosella ED. (2001) Soluble HLA-G protein secreted by allo-specific CD4+ T cells suppresses the allo-proliferative response: a CD4+ T cell regulatory mechanism. Proc Natl Acad Sci U S A. 98(21):12150-12155. PMID: 11572934

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Product General Protocols

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Video Protocols

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Secondary Antibodies

 

Isotype Controls

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Research Areas for HLA G Antibody (NBP3-21711)

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Blogs on HLA G.

Harnessing Natural Killer Cell Activity for Anti-Tumor Immunotherapy
By Victoria Osinski, PhDWhat’s “Natural” About Natural Killer (NK) Cells?For immunologists, the term cytotoxicity often conjures up images of an army of antigen specific CD8+ T cells deploying to ...  Read full blog post.

HLA G - mediating immune tolerance during pregnancy
Human leukocyte antigen G (HLA G) is a major histocompatibility complex (MHC) class I molecule that is primarily expressed in the placenta and is essential for the immune tolerance of the fetus during pregnancy. Unlike many HLA genes, HLA G has re...  Read full blog post.

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Bioinformatics

Gene Symbol HLA-G