ASC/TMS1 Antibody Blocking Peptide

Novus Biologicals, part of Bio-Techne | Catalog # NBP1-78977PEP

Novus Biologicals, part of Bio-Techne
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Key Product Details

Conjugate

Unconjugated

Applications

Antibody Competition

View all ASC Proteins and Enzymes »

Product Specifications

Description

Application Notes

This peptide is useful as a blocking peptide for NBP1-78977. For further blocking peptide related protocol, click here.

Specificity

This peptide is specific for NBP1-78977 only.

Protein / Peptide Type

Antibody Blocking Peptide

Formulation, Preparation and Storage

NBP1-78977PEP
Formulation Peptide dissolved in dH20. Contains no BSA.
Preservative No Preservative
Concentration 1 mg/ml
Shipping The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage Store at -80C. Avoid freeze-thaw cycles.

Background: ASC

ASC (apoptosis-associated speck-like protein containing a CARD), also known as TMS1 (target of methylation-induced silencing), was first identified in 1999 as a protein that forms aggregates, or specks, during retinoic acid-induced apoptosis in a human leukemia cell line (1). Furthermore, it was discovered to have a role as a tumor suppressor as methylation silences ASC/TMS1 expression in many tumors (2-5). ASC/TMS1 is synthesized as a 195-amino acid (aa) protein with a theoretical weight of 22 kDa. Structurally the protein contains a N-terminal PYD (pyrin domain) and C-terminal CARD (caspase-recruitment domain) (1-4). Historically, CARD and PYD-containing proteins are known to have crucial functions in regulating apoptosis and immune response pathways (2-5). Furthermore, mutations in many CARD and PYD-containing proteins have been linked to various cancers and inflammatory diseases (2-5). Given its immune response role, it is not surprising that ASC/TMS1 is typically highly expressed in immune cells, specifically in neutrophils and cells of the macrophage/monocyte lineage (5). Additionally, it is expressed in many normal epithelial cell types (4,5).

In regard to immune and inflammatory response, ASC/TMS1 is involved in inflammasome function (3-4). The inflammasome is a multiprotein complex that responds to cellular stress or pathogens and activates inflammatory responses. Specifically, ASC/TMS1 helps assemble the NLRP3 inflammasome complex which then activates caspase-1, followed by stimulation of proinflammatory cytokines including IL-1b and IL-18 (3-4). In terms of the role in regulating apoptosis, multiple studies have revealed that the ASC/TMS1 gene is hypermethylated in many cancers including breast, lung, glioblastomas, and melanomas (2-5). The increased methylation results in decreased gene expression, or silencing, allowing those cancer cells to escape apoptosis (2-5).

References

1. Masumoto, J., Taniguchi, S., Ayukawa, K., Sarvotham, H., Kishino, T., Niikawa, N., Hidaka, E., Katsuyama, T., Higuchi, T., & Sagara, J. (1999). ASC, a novel 22-kDa protein, aggregates during apoptosis of human promyelocytic leukemia HL-60 cells. The Journal of biological chemistry, 274(48), 33835-33838. https://doi.org/10.1074/jbc.274.48.33835

2. McConnell, B. B., & Vertino, P. M. (2004). TMS1/ASC: the cancer connection. Apoptosis: an international journal on programmed cell death. https://doi.org/10.1023/B:APPT.0000012117.32430.0c

3. Salminen, A., Kauppinen, A., Hiltunen, M., & Kaarniranta, K. (2014). Epigenetic regulation of ASC/TMS1 expression: potential role in apoptosis and inflammasome function. Cellular and molecular life sciences : CMLS. https://doi.org/10.1007/s00018-013-1524-9

4. Protti, M. P., & De Monte, L. (2020). Dual Role of Inflammasome Adaptor ASC in Cancer. Frontiers in cell and developmental biology. https://doi.org/10.3389/fcell.2020.00040

5. Parsons, M. J., & Vertino, P. M. (2006). Dual role of TMS1/ASC in death receptor signaling. Oncogene. https://doi.org/10.1038/sj.onc.1209684

Long Name

Apoptosis-Associated Speck-Like Protein Containing A CARD

Alternate Names

CARD5, PYCARD, TMS1

Gene Symbol

PYCARD

Additional ASC Products

Product Documents for ASC/TMS1 Antibody Blocking Peptide

Product Datasheets

Certificate of Analysis

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Product Specific Notices for ASC/TMS1 Antibody Blocking Peptide

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

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