| 2020 |
ZSWIM8 is a substrate adaptor of a Cullin-RING E3 ubiquitin ligase (CRL) that interacts with AGO proteins and mediates target-directed miRNA degradation (TDMD) by directing proteasomal decay of miRNA-containing AGO complexes engaged with highly complementary 'trigger' target RNAs, thereby exposing the miRNA for degradation. This mechanism is independent of miRNA tailing and trimming. |
CRISPR/Cas9 loss-of-function, co-immunoprecipitation of ZSWIM8 CRL with AGO proteins, small RNA sequencing in loss-of-function cells, genetic rescue experiments in mammals, flies, and nematodes |
Science (New York, N.Y.) |
High |
33184234 33184237
|
| 2020 |
ZSWIM8 CRL-mediated AGO polyubiquitination and proteasomal degradation is the key regulatory step of TDMD; the ZSWIM8 CRL specifically recognizes AGO complexes only when the miRNA is extensively paired to a trigger RNA, not when engaged with typical target RNAs. |
Biochemical in vitro ubiquitylation assays, cryo-EM structural analysis of AGO2-miRNA-trigger complex bound to ZSWIM8, cellular ubiquitination assays with mutational analysis |
Nature |
High |
41851464
|
| 2026 |
Cryo-EM analyses revealed that ZSWIM8 recognizes distinct AGO2 conformational states induced by miRNA-trigger pairing: the trigger RNA extracts the miRNA from a binding pocket within AGO2, allowing the pocket to be captured by ZSWIM8, and the trigger RNA itself follows a distinct trajectory also recognized by ZSWIM8. This establishes a 'two-RNA-factor authentication' mechanism for specifying AGO ubiquitylation that does not conform to a conventional degron. |
Cryo-EM structural determination, in vitro biochemical ubiquitylation reconstitution, active-site mutagenesis, cellular assays |
Nature |
High |
41542392 41851464
|
| 2023 |
Conditional deletion of Zswim8 in the mouse embryonic nervous system causes global cellular stress, partial perinatal lethality, defective migration of neural progenitor cells, and impaired spine formation and synaptogenesis. Mechanistically, ZSWIM8 controls protein quality of Disabled 1 (Dab1) by recognizing intrinsically disordered regions (IDRs) of Dab1 through a 'disorder targets misorder' mechanism, eliminating misfolded Dab1 that cannot be properly phosphorylated. |
Conditional CRISPR knockout in mouse nervous system, Co-IP/pulldown for ZSWIM8-Dab1 interaction, ubiquitination assays, hippocampal neuron spine/synapse imaging |
Cerebral cortex (New York, N.Y. : 1991) |
Medium |
35989311
|
| 2023 |
Constitutive Zswim8 knockout mice die perinatally with lung sacculation defects (failed alveolar epithelial maturation) and ventricular septal defects. Loss of ZSWIM8 results in aberrant accumulation of >50 miRNAs across 12 tissues, demonstrating that ZSWIM8 specifies the half-lives of most short-lived miRNAs in mice. ZSWIM8-sensitive miRNAs are preferentially produced from genomic miRNA clusters, and ZSWIM8 can cause strand/isoform switching from a miRNA hairpin. |
Constitutive Zswim8 knockout mouse generation, small RNA sequencing across 12 tissues, mRNA target repression analysis |
Genome research |
High |
37532519 37553261
|
| 2023 |
Deletion of miR-322 and miR-503 rescued embryonic growth restriction in Zswim8-null mice, directly establishing that TDMD-mediated degradation of these specific miRNAs by ZSWIM8 is required for normal mammalian body size. |
Genetic epistasis in mice — double KO (Zswim8-null × miR-322/503-null) with embryonic growth measurements |
Genes & development |
High |
37553261 41213800
|
| 2024 |
ZSWIM8, as the substrate receptor of the Cullin3-RING E3 ligase complex, is required for Zika virus NS5-mediated degradation of STAT2. NS5 acts as a scaffold that enhances the interaction between STAT2 and the ZSWIM8-CUL3 complex, facilitating STAT2 ubiquitination and proteasomal degradation, thereby suppressing type I interferon signaling. |
Genome-wide CRISPR/Cas9 screen, genetic depletion of ZSWIM8 and CUL3, biochemical Co-IP showing NS5 bridges STAT2 and ZSWIM8-CUL3, ubiquitination assays, ZSWIM8 KO in A549/Huh7 and human neural progenitor cells |
Proceedings of the National Academy of Sciences of the United States of America |
High |
39145933
|
| 2022 |
The Drosophila ZSWIM8 ortholog Pelado/CG34401 promotes linear actin filament polymerization at the expense of branched filaments. Loss of Pelado causes actin hair elongation defects in epithelial cells and loss of filopodia in hemocytes. This function is conserved in human cells, where ZSWIM8 knockdown inhibits cell migration by affecting branched actin polymerization. |
Drosophila pelado mutant analysis, genetic epistasis with actin regulators (linear vs. branched polymerization), human cell ZSWIM8 knockdown with migration assay and actin cytoskeleton imaging |
Life science alliance |
Medium |
35940847
|
| 2021 |
ZSWIM8 is induced during C2C12 myoblast differentiation and is incorporated into the Cdon/JLP/Bnip-2/CDC42 complex. ZSWIM8 knockdown accelerates C2C12 differentiation, indicating that ZSWIM8 partly prevents myogenic differentiation. However, ZSWIM8-dependent ubiquitination or degradation of Bnip2, Cdon, or JLP was not detected. |
Co-immunoprecipitation of ZSWIM8 with Cdon complex components, siRNA knockdown of Zswim8 in C2C12 cells with differentiation assay, ubiquitination assay (negative for Bnip2/Cdon/JLP as substrates) |
Scientific reports |
Medium |
34686700
|
| 2021 |
In Drosophila, siRNAs loaded into Ago2 are insensitive to Dora (ZSWIM8 ortholog)-mediated target-directed degradation. This protection is conferred by features of the Ago2 protein itself, not by 2'-O-methylation of the small RNA 3' termini. In contrast, the same siRNAs are sensitive to Dora when loaded into Ago1. |
Genetic Dora loss-of-function in Drosophila, small RNA sequencing comparing Ago1- vs. Ago2-loaded siRNAs, 2'-O-methylation analysis |
RNA (New York, N.Y.) |
Medium |
33853897
|
| 2023 |
In Drosophila S2 cells, the ZSWIM8 ortholog Dora is required for TDMD; AGO1-CLASH identified five TDMD trigger sequences, including a trigger in the 3' UTR of AGO1 mRNA itself that induces miR-999 degradation. Knockout of the AGO1 trigger in S2 cells and in Drosophila specifically elevated miR-999 with concurrent repression of miR-999 targets. |
AGO1-CLASH in Dora CRISPR KO Drosophila S2 cells, CRISPR-Cas9 knockout of the AGO1 3' UTR trigger site in S2 cells and in vivo, miRNA/mRNA sequencing |
Nature communications |
High |
37055443
|
| 2024 |
In C. elegans, EBAX-1 (the ZSWIM8 ortholog) polyubiquitinates AGO, leading to its degradation and exposure of the miRNA to cellular nucleases; 22 miRNAs are sensitive to EBAX-1 loss, with the greatest effect in L1 larvae. The 3' region of a miRNA influences EBAX-1 sensitivity in a variable manner. |
ebax-1 mutant small RNA sequencing at multiple developmental stages, mRNA target repression analysis, miRNA 3' region replacement experiments |
RNA (New York, N.Y.) |
Medium |
39433399
|
| 2025 |
In Drosophila ovarian somatic cells, Dora (ZSWIM8 ortholog) associates with CRL3 complex proteins (Cul3, EloB, EloC), and depletion of CRL3 components or inhibition of Cul3 neddylation (via UbcE2M) upregulates miR-7-5p. Dora localizes to protein granules distinct from P-bodies and GW-bodies. Loss of Dora impairs Notch signaling pathway activity. |
Co-immunoprecipitation of Dora with CRL3 components, dora CRISPR KO with miRNA sequencing, CRL3 component RNAi, neddylation inhibition, fluorescence localization of tagged Dora |
Biochimica et biophysica acta. Gene regulatory mechanisms |
Medium |
40328417
|
| 2026 |
ZSWIM8 is indispensable for oligodendrocyte maturation and myelination. Loss of ZSWIM8 in brain causes accumulation of IDR-rich proteins including RNA-binding proteins; AGO2 stabilization in ZSWIM8-null tissues disrupts TDMD of miR-7, leading to altered gene expression and myelination defects in vivo. ZSWIM8-mediated ubiquitination of AGO2 also requires microRNA binding to AGO2. |
Conditional ZSWIM8 KO in mouse brain, proteomic analysis of IDR protein accumulation, AGO2 ubiquitination assays, miRNA sequencing, myelination phenotype histology |
Glia |
Medium |
41787678
|
| 2026 |
In C. elegans, EBAX-1/ZSWIM8 promotes linker cell-type death (LCD) non-apoptotically and cell-autonomously through TDMD. EBAX-1 requires its Cullin-2 binding motif for LCD. Loss of mir-35 family miRNAs, argonautes, or miRNA biogenesis factors restores LCD to ebax-1 mutants. The predicted miR-35 target viln-1/villin mRNA is upregulated in dying cells and required for LCD. |
Genetic epistasis (ebax-1 mutant × argonaute/mir-35/biogenesis factor mutants), cell-autonomous rescue, mRNA expression analysis of viln-1, LCD quantitation |
bioRxiv : the preprint server for biologypreprint |
Medium |
41542532
|
| 2024 |
In Pristionchus pacificus, EBAX-1/ZSWIM8 destabilizes the clustered miRNA family miR-2235a/miR-35, and this is required for transgenerational epigenetic memory of the predatory mouth form after dietary switching. Ppa-ebax-1 mutants show no transgenerational memory; deletion of a cluster of 44 miR-2235a copies results in precocious and extended transgenerational inheritance. |
ebax-1 mutant analysis, miRNA cluster deletion, dietary induction and food-reversal experiments across multiple generations, miRNA sequencing |
bioRxiv : the preprint server for biologypreprint |
Low |
bio_10.1101_2024.09.10.612280
|