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Updated: Mar 7, 2026
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Evaluation of Substrate Ubiquitylation by E3 Ubiquitin-ligase in Mammalian Cell Lysates
Published on: May 10, 2022
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The Ubiquitin Ligase Zinc Finger SWIM Domain-Containing Protein 8 Regulates Oligodendrocyte Development Through the
Jing Lei1,2,3, Siming Zhong4,5, Rong Fan6
1International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang University School of Medicine, Yiwu, China.
Glia
|March 6, 2026
Summary
ZSWIM8 ubiquitin ligase is vital for central nervous system (CNS) development, regulating oligodendrocyte maturation and myelination by controlling intrinsically disordered region (IDR) protein levels.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Proteostasis of proteins with intrinsically disordered regions (IDRs) is crucial for central nervous system (CNS) development.
- ZSWIM8 ubiquitin ligase regulates mammalian brain development and neuronal cell migration by targeting IDR proteins.
Purpose of the Study:
- To investigate the role of ZSWIM8 in oligodendrocyte maturation and myelination.
- To elucidate the mechanisms by which ZSWIM8 controls IDR protein homeostasis and its impact on CNS development.
Main Methods:
- Analysis of ZSWIM8-null mouse models.
- Assessment of protein aggregation and ubiquitination.
- Investigation of microRNA (miRNA) processing and function.
- Evaluation of myelination in vivo.
Main Results:
- ZSWIM8 is essential for oligodendrocyte maturation and CNS myelination.
- Loss of ZSWIM8 leads to accumulation of IDR-rich proteins, including RNA-binding proteins (RBPs).
- ZSWIM8 regulates AGO2 ubiquitination and stabilization, impacting target-directed microRNA degradation (TDMD) of miR7, ultimately affecting gene expression and myelination.
Conclusions:
- ZSWIM8 is a key regulator of IDR protein homeostasis and a versatile controller of CNS development.
- Maintaining homeostasis of RBPs and miRNAs is critical for proper oligodendrocyte development and myelination.
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