Encyclopedia of Signaling Molecules

2018 Edition
| Editors: Sangdun Choi

CD81

  • Shoshana LevyEmail author
Reference work entry
First Online:
DOI: https://doi.org/10.1007/978-3-319-67199-4_599
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Synonyms

 TAPA-1;  TSPAN 28

Historical Background

CD81 was originally identified as a Target of an Anti-Proliferative Antibody (TAPA-1) in a study that also defined a new family of transmembrane proteins, later named tetraspanins (Oren et al. 1990). CD81 is expressed on most human cell types; however, Oren et al. have shown that the sensitivity of diverse cell lineages to the anti-proliferative effect of the anti-CD81 antibody differed (Oren et al. 1990). Therefore, subsequent immune-co-precipitation studies were performed to reveal that CD81 associates with different partner proteins in the various cells types. For example, in B cells CD81 associates with CD19, a B cell specific signaling molecule. Similar studies on additional family members confirmed that tetraspanins tend to associate in the membrane with each other and with additional partner proteins. These tetraspanin-enriched microdomains (TEMs) are dynamic membrane entities, which act as signaling platforms (reviewed in (Levy...

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References

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.School of Medicine – Division of Oncology Center for Clinical Sciences ResearchStanford UniversityStanfordUSA