ASC/TMS1 RNAi

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View other related ASC/TMS1 RNAi

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    • Catalog Number
      H00029108-R02
    • Availability
      Product Discontinued

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ASC/TMS1 RNAi Summary

Specificity
Homo sapiens PYD and CARD domain containing (PYCARD), transcript variant 2, mRNA
Gene
PYCARD

Applications/Dilutions

Dilutions
  • RNA Inhibition
  • RNAi sequence position
Application Notes
This RNAi causes protein knockdown.

Packaging, Storage & Formulations

Storage
Store at -20C. Avoid freeze-thaw cycles.
Buffer
DEPC-treated Water

Notes

This product is produced by and distributed for Abnova, a company based in Taiwan.

Alternate Names for ASC/TMS1 RNAi

  • apoptosis-associated speck-like protein containing a CARD
  • ASC
  • CARD5
  • caspase recruitment domain protein 5
  • Caspase recruitment domain-containing protein 5
  • hASC
  • PYCARD
  • PYD and CARD domain-containing protein
  • Target of methylation-induced silencing 1
  • TMS
  • TMS1
  • TMS-1

Background

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

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. RNAi are guaranteed for 3 months from date of receipt.

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Bioinformatics

Gene Symbol PYCARD