Ubiquitin-like 3 as a new protein-sorting factor for small extracellular vesicles.

Yusuke Takanashi, Tomoaki Kahyo, Sae Kamamoto, Hengsen Zhang, Bin Chen, Yashuang Ping, Kiyomichi Mizuno, Akikazu Kawase, Kei Koizumi, Masanori Satou, Kazuhito Funai, Norihiko Shiiya, Mitsutoshi Setou

Cell structure and function 2022

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Ubiquitin-like 3 (UBL3) is a well-conserved ubiquitin-like protein (UBL) in eukaryotes and regulates the ubiquitin cascade, but the significant roles of UBL3 in cellular processes remained unknown. Recently, UBL3 was elucidated to be a post-translational modification factor that promotes protein sorting to small extracellular vesicles (sEVs). Proteins sorted into sEVs have been studied as etiologies of sEV-related diseases. Also, there have been attempts to construct drug delivery systems (DDSs) by loading proteins into sEVs. In this review, we introduce the new concept that UBL3 has a critical role in the protein-sorting system and compare structure conservation between UBL3 and other UBLs from an evolutionary perspective. We conclude with future perspectives for the utility of UBL3 in sEV-related diseases and DDS.Key words: UBL3, small extracellular vesicles, protein sorting, ubiquitin-like protein, post-translational modification.

Citation

Yusuke Takanashi, Tomoaki Kahyo, Sae Kamamoto, Hengsen Zhang, Bin Chen, Yashuang Ping, Kiyomichi Mizuno, Akikazu Kawase, Kei Koizumi, Masanori Satou, Kazuhito Funai, Norihiko Shiiya, Mitsutoshi Setou. Ubiquitin-like 3 as a new protein-sorting factor for small extracellular vesicles. Cell structure and function. 2022;47(1):1-18