| 2016 |
UBA52 encodes a fusion protein of ubiquitin and ribosomal protein L40 (RPL40); proteolytic cleavage of RPL40 from UBA52 is required for maintaining protein synthesis, and RPL40 forms a ribosomal complex with ubiquitin co-supplied by UBA52. Expression of RPL40 alone (without the ubiquitin moiety) is insufficient to regulate cyclin D expression or rescue cell-cycle arrest caused by UBA52 deficiency. |
Knockout mouse model (Uba52-deficient embryonic lethality), cell-based overexpression/rescue assays, ribosomal fractionation, cyclin D expression analysis |
Scientific reports |
High |
27829658
|
| 2018 |
UBA52 (Uba52) is essential for preimplantation embryo development; CRISPR/Cas9-mediated biallelic knockout in porcine embryos causes developmental arrest at the 4-to-8-cell transition (around major zygotic genomic activation), reduces proteasome protein levels, and causes abnormal nuclear morphology. |
CRISPR/Cas9 gene editing in porcine oocytes, in vitro fertilization, immunolabeling, western blotting, PCR genotyping |
Biology open |
High |
30135083
|
| 2022 |
UBA52 physically interacts with α-synuclein, HSP90, and E3-ubiquitin ligase CHIP; the lysine-63 residue of UBA52 is required for CHIP-mediated ubiquitylation of HSP90 in vitro. UBA52 co-localizes with α-synuclein in the mitochondrion. |
In silico prediction, mass spectrometry, co-immunoprecipitation, in vitro ubiquitylation assay with K63 mutant, immunofluorescence co-localization |
Cells |
Medium |
36497031
|
| 2023 |
UBA52 interacts with mitochondrial outer membrane channel protein VDAC1 and participates in CHIP-mediated ubiquitylation of VDAC1, as shown by mass spectrometry, co-immunoprecipitation, and in vitro ubiquitylation assay. UBA52 overexpression preserves mitochondrial membrane potential, complex I activity, and prevents cytochrome c release and mPTP opening in a Parkinson's disease neuronal model. |
Mass spectrometry, co-immunoprecipitation, in vitro ubiquitylation assay, mitochondrial functional assays (JC-1, cytochrome c translocation, calcium uptake, mPTP) |
ACS chemical neuroscience |
Medium |
36755387
|
| 2019 |
Degradation of CCNB1 (cyclin B1) depends on UBA52-mediated ubiquitylation, which in turn requires APC11. Knockdown of APC11 causes G2/M arrest even when UBA52 is overexpressed, placing APC11 downstream of or in concert with UBA52 in CCNB1 degradation for cell cycle progression. |
Co-immunoprecipitation, shRNA/siRNA knockdown, overexpression, flow cytometry cell cycle analysis, xenograft tumor assay |
American journal of translational research |
Medium |
31814919
|
| 2024 |
SMYD5 trimethylates RPL40 (the C-terminal ribosomal protein encoded by UBA52) at lysine 22 (K22me3); recombinant SMYD5 has robust in vitro methyltransferase activity toward RPL40 K22, active-site mutations ablate this activity, and SMYD5 knockout leads to complete loss of RPL40 K22me3 and reduced translation output with increased ribosome collisions in gastric cancer cells. |
Biochemical-proteomics, in vitro methylation assay with recombinant SMYD5, active-site mutagenesis, SMYD5 CRISPR knockout, polysome profiling, ribosome collision assay |
Nature |
High |
39048817 39103523
|
| 2025 |
SMYD5 catalyzes RPL40 K22 trimethylation through recognition of a KXY motif; systematic analysis shows SMYD5 does not methylate histones in vitro, and requires a tyrosine at the +2 position of the target peptide. Loss of SMYD5 in K562 cells causes complete loss of RPL40 K22me3 and decreased polysome levels. |
Mass spectrometry-based ribosome methylation profiling, in vitro methylation of synthetic RPL40 using fractionated lysate, recombinant SMYD5 activity assay, active-site mutagenesis, SMYD5 CRISPR KO, polysome analysis, systematic KXY motif analysis |
Cell reports |
High |
40184250
|
| 2023 |
The C-terminal ribosomal fragment L40 (encoded by UBA52) masks the regulatory acidic residues E143/E144 and the nucleosome acidic patch to limit RNF168-nucleosome engagement, thereby antagonizing RNF168-mediated H2A/H2AX ubiquitination at K13/15 and impairing 53BP1 recruitment to DNA damage sites. UBA52 (and UBA80/RPS27A) are recruited to laser-induced DNA damage sites and are required for DNA repair. |
Laser micro-irradiation recruitment assay, ectopic expression of C-terminal fragments, RNF168-nucleosome engagement assay, H2A ubiquitination assay, 53BP1 recruitment imaging |
The Journal of biological chemistry |
Medium |
37451480
|
| 2023 |
RPL40 knockdown did not stabilize p53 in U2OS cells and did not block p53 stabilization following actinomycin D-induced ribosome biogenesis inhibition, indicating RPL40 is not required for the ribosomal protein–MDM2–p53 stress-signaling pathway in these cells. However, in MCF7 and LNCaP cells, combined knockdown of RPL40 and RPS27a robustly induced p53. RPL40 knockdown impairs rRNA production in all cell lines tested. |
siRNA knockdown, actinomycin D treatment, p53 western blotting, rRNA production assay, multiple cell lines |
Biomolecules |
Medium |
37371478
|
| 2024 |
MLKL physically binds UBA52 under physiological conditions; loss of MLKL prevents USP7-mediated cleavage/processing of UBA52, reducing free ubiquitin levels and thereby decreasing K63-linked polyubiquitination of BECN1 and ULK1, which impairs autophagy in the brain. |
Co-immunoprecipitation, mlkl knockout mouse, ubiquitin level measurement, K63-ubiquitination assay, single-nucleus RNA sequencing, behavioral testing |
Autophagy |
Medium |
39193909
|
| 2023 |
UBA52-driven ubiquitination promotes degradation of ferroportin (Fpn) via accelerated ubiquitination triggered by reactive oxygen species at the nerve injury site; hydralazine binds UBA52 and competitively inhibits this interaction, reducing Fpn ubiquitination and protecting neurons from ferroptosis. |
In vitro and in vivo ubiquitination assays, competitive binding assay, peripheral nerve injury mouse model, ferroptosis markers, motor function assessment |
Journal of pharmaceutical analysis |
Medium |
38352945
|
| 2024 |
UBA52 knockdown induces autophagy through EMC6 in hepatocellular carcinoma cells, suppressing HCC cell growth and metastasis both in vitro and in vivo. |
siRNA/shRNA knockdown, CCK-8, colony formation, wound healing, Transwell, xenograft mouse model, bioinformatic autophagy pathway analysis |
Journal of cellular and molecular medicine |
Low |
38445807
|
| 2025 |
ROCK2 competes with UBA52 to bind DRP1, thereby preventing UBA52-mediated K48-linked ubiquitination and proteasomal degradation of DRP1; this ROCK2/UBA52/DRP1 axis drives pemigatinib resistance in cholangiocarcinoma by stabilizing DRP1 to suppress ferroptosis. |
Co-immunoprecipitation, ubiquitination assay, siRNA knockdown, overexpression, competitive binding assay, in vitro and in vivo tumor models |
Cell death & disease |
Medium |
40615369
|
| 2018 |
UBA52 interacts with influenza A virus PA, PA-N155, and PA-N182 proteins in chicken cells; knockdown of UBA52 significantly decreased H5N1 influenza virus titer and attenuated proinflammatory cytokine production, indicating UBA52 is a host factor required for viral replication. |
Immunoprecipitation, mass spectrometry interactome, siRNA knockdown, viral titer assay, cytokine measurement |
Frontiers in microbiology |
Medium |
29867845
|
| 2026 |
UBA52 directly promotes ubiquitin-mediated degradation of β-catenin; HOPX directly inhibits the UBA52-β-catenin interaction to stabilize β-catenin and activate Wnt/β-catenin signaling in intestinal stem cells in a high-iron context. |
Co-immunoprecipitation, competitive binding assay, ubiquitination assay, Hopx+ ISC lineage tracing, CRC mouse model |
International journal of biological sciences |
Medium |
42157941
|
| 2026 |
NUDT7 targets UBA52 for proteasomal degradation, reducing free ubiquitin and blocking UBA52-mediated K11/K27/K48-linked polyubiquitination of SREBF1, thereby stabilizing SREBF1 to enhance lipid droplet formation and create a favorable environment for PRRSV replication. |
Co-immunoprecipitation, ubiquitination assay (K11/K27/K48 linkage-specific), proteasome inhibitor assay, siRNA knockdown, lipid droplet staining, viral replication assay |
International journal of biological sciences |
Medium |
41608635
|
| 2026 |
EMMPRIN downregulates UBA52 expression, reducing the free ubiquitin pool and decreasing K63-linked polyubiquitination of monocarboxylate transporter 1 (MCT1), leading to MCT1 destabilization and global increase in protein lactylation. |
Proteomic sequencing, mass spectrometry, co-immunoprecipitation, western blotting, K63-linkage ubiquitination assay, EMMPRIN KO/OE mouse and cell models |
Frontiers in pharmacology |
Medium |
41660506
|
| 2026 |
UBA52 promotes Daxx ubiquitination and proteasomal degradation; UBA52 overexpression reduces hemin-induced neuronal apoptosis and mitochondrial dysfunction, and this protective effect is abolished by Daxx overexpression, placing Daxx downstream of UBA52. |
IP-LC/MS, co-immunoprecipitation, AAV9 overexpression in ICH mouse model, TUNEL assay, JC-1 staining, MitoTracker, caspase-3/9 measurement, rescue experiment with Daxx overexpression |
Molecular neurobiology |
Medium |
41553582
|
| 2025 |
Sparc physically interacts with UBA52 (identified by immunoprecipitation/mass spectrometry and validated by co-immunoprecipitation) and upregulates UBA52 expression; knockdown of Uba52 abolishes the anti-inflammatory and mitochondrial-protective effects of Sparc overexpression in LPS-stimulated microglial cells. |
Immunoprecipitation + mass spectrometry, co-immunoprecipitation, siRNA knockdown, co-culture with neurons, cytokine ELISA, ROS/mitochondrial potential assays |
Frontiers in bioscience (Landmark edition) |
Low |
40917064
|
| 2025 |
During non-segmented negative-sense viral infection, rpL40 (the ribosomal protein encoded by UBA52) is recruited to a noncanonical site on the small subunit of 80S ribosomes near the mRNA entry site, forming specialized ribosomes that preferentially bind viral mRNAs to enhance viral protein synthesis critical for replication. |
Cryo-EM/structural ribosome analysis, ribosome fractionation, viral infection model, mRNA binding assay |
bioRxivpreprint |
Medium |
|
| 2002 |
The UbA52 promoter contains glucose-responsive E-box sequences and stress response elements (STRE); mutations in the first E-box or STRE reduce promoter activity under high glucose conditions in kidney cells, and UbA52 protein localizes to renal tubules and ribosomal fractions. |
Promoter deletion constructs with SEAP reporter, site-directed mutagenesis, primer extension, in situ hybridization, immunohistochemistry, ribosomal fractionation |
The Journal of biological chemistry |
Medium |
12171997
|