SerpinB9 Antibody (7D8) [PE/Cy7]

• Reactivity: Hu, Mu(-), Po(-)
• Applications: WB, Flow, IHC
• Clone: 7D8
• Clonality: Monoclonal
• Host: Mouse
• Conjugate: PE/Cy7

SerpinB9 Antibody (7D8) [PE/Cy7] Summary

• Description: This conjugate is made on demand and is not held in inventory. Each order represents a unique lot. All conjugates are generated using validated conjugation protocols and meet strict degree of labeling (F/P) specifications; additional information is available upon request. The antibody concentration is provided on the individual product label.
  
  For specialized conjugation needs, like large quantities, specific concentrations, and defined F/P ratios, bulk and custom antibody conjugation services are available.
• Immunogen: Recombinant PI-9 produced in P. pastoris
• Specificity: NB100-64359 is specific for human PI-9 (proteinase inhibitor 9), also known as SerpinB9, a 42kDa intracellular nucleocytoplasmic serpin expressed in cytotoxic lymphocytes (CTLs), natural killer (NK) cells, monocyte-derived dendritic cells (DCs), and to a lesser extent in B cells and myeloid cells. Granzyme B (grB) is a serine protease highly expressed by CTLs and NK cells, which is endocytosed by virus-infected and malignant target cells. The subsequent release of grB from the endocytic vesicles into the cytoplasm of the target cells, triggers grB-mediated apoptosis, through cleavage of various cytoplasmic or nuclear proteins. PI-9, up-regulated in response to grB production and degranulation, has been identified as a potent inhibitor of Granzyme B-mediated apoptosis, providing a vital self-protection mechanism against the premature apoptosis of CTLs and NK cells by grB, which may escape into the cytoplasm of the effector cells themselves. Clone 7D8 detects a band of approximately 42kDa under reducing conditions. Clone 7D8 is suitable for use in indirect Immunofluorescence (2).
• Isotype: IgG1
• Clonality: Monoclonal
• Host: Mouse
• Gene: SERPINB9
• Purity: Protein G purified

Applications/Dilutions

• Dilutions:
  • Flow Cytometry
  • Immunohistochemistry
  • Immunohistochemistry-Frozen
  • Immunohistochemistry-Paraffin
  • Western Blot
• Application Notes: Optimal dilution of this antibody should be experimentally determined. For optimal results using our Tandem dyes, please avoid prolonged exposure to light or extreme temperature fluctuations. These can lead to irreversible degradation or decoupling. When staining intracellular targets, specific attention to the fixation and permeabilization steps in your flow protocol may be required. Please contact our technical support team at technical@novusbio.com if you have any questions. This conjugated antibody is not kept in inventory and is made to order using validated conjugation protocols.

Reactivity Notes

Reacts with Human. Does not react with Pig or Mouse.

Packaging, Storage & Formulations

• Storage: Store at 4C in the dark. Do not freeze.
• Buffer: PBS
• Preservative: 0.05% Sodium Azide
• Purity: Protein G purified

Notes

Cy is a registered trademark of Global Life Sciences Solutions Germany GmbH.

Alternate Names for SerpinB9 Antibody (7D8) [PE/Cy7]

• CAP-3
• CAP3PI-9
• Cytoplasmic antiproteinase 3
• Peptidase inhibitor 9
• PI9protease inhibitor 9 (ovalbumin type)
• serine (or cysteine) proteinase inhibitor, clade B (ovalbumin), member 9
• serpin B9
• serpin peptidase inhibitor, clade B (ovalbumin), member 9
• serpin peptidase inhibitor, clade B, member 9

Background

SerpinB9 is a serine proteinase inhibitor of the ovalbumin like B clade of serpins. The mouse orthologue to PI9 is SPI-6. SerpinB9 was first discovered in human bone marrow in a search for serpins similar to SerpinB6. SerpinB9 was identified in lymphocytes, especially natural killer cells and cytotoxic T lymphocytes, cells which also produce and store the apoptosis-inducing enzyme Granzyme B. PI9 was shown to be a potent inhibitor of Granzyme B, working at picamolar efficiencies. PI9 was also shown to inhibit caspase 1, the interleukin 1 converting enzyme, thus blocking IL1 223; production, and decreasing inflammatory processes. Most leukemia cells and many tumor cells produce PI9, leading to speculation that PI9 may help protect tumor cells from destruction by NK and CTL cells. PI9 is also found in placenta, lung, kidney, mast cells, and many tissues and cell lines. In kidney transplant, PI9 is sharply elevated, and in the liver PI9 has been shown to be upregulated by a downstream estrogen promoter. SerpinB9 inhibits Granzyme B, and is cleaved by Granzyme M, as a down regulatory step. SerpinB9 also inhibits the bacterial proteinase subtilisin A, and this may be a protective agent against infections. Neutrophil elastase is also a target of SerpinB9. Like SerpinB6 and SerpinB8, SerpinB9 lacks a signal sequence, and is found mainly in the cytoplasm and nucleus, although it can be detected outside of cells and in serum. The original SerpinB9 sequence described was 379 amino acids in length, with predicted mass of 42.4 kDa and pI of 5.51.

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.

Bioinformatics

• Gene Symbol: SERPINB9