Wild type, dEX3 and 2B survivin isoforms localize to the tumor cell plasma membrane, are secreted in exosomes, and interact with extracellular tubulin

The Inhibitor of Apoptosis Protein survivin (svn) is upregulated in nearly all types of cancer and represents a promising therapeutic target. Localization to specific subcellular compartments and interactions with various binding partners allow survivin to play diverse roles in apoptosis resistance...

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Bibliographic Details
Published in:Biochemistry and biophysics reports 2021-12, Vol.28, p.101174-101174, Article 101174
Main Authors: Figel, Sheila, Birkemeier, Meaghan, Dharma, Sanam Sahjram, Barone, Tara, Steinmetz, Emma, Ciesielski, Michael, Fenstermaker, Robert
Format: Article
Language:English
Subjects:
Exosome
Plasma membrane
Short Communication
Survivin
Survivin-2B
Survivin-dEX3
Tubulin
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Summary:The Inhibitor of Apoptosis Protein survivin (svn) is upregulated in nearly all types of cancer and represents a promising therapeutic target. Localization to specific subcellular compartments and interactions with various binding partners allow survivin to play diverse roles in apoptosis resistance and mitosis. Survivin has recently been found in two extracellular compartments: the outer plasma membrane and secreted exosomes. In addition to svn-wt, splice variants svn-dEX3 and svn-2B are also overexpressed in human tumors. Here we show that, similarly to svn-wt, svn-dEX3 and svn-2B can be displayed on the outer plasma membrane, and secreted in exosomes. Additionally, we have identified a novel interaction of all three forms of survivin with secreted tubulin.
ISSN:2405-5808
2405-5808
DOI:10.1016/j.bbrep.2021.101174