| 2014 |
PARP12 is an interferon-stimulated gene (ISG) that localizes to stress granules upon ectopic expression or oxidative stress, where it blocks mRNA translation. Both the N-terminal RNA-binding domain (five CCCH-type Zn-fingers) and an intact catalytic domain are required for translational suppression. Upon LPS stimulation, PARP12 instead localizes to p62/SQSTM1-containing structures, and deletion of the N-terminal domain promotes this association, correlating with increased NF-κB signaling. |
Ectopic expression, stress granule co-localization, deletion mutagenesis, translational reporter assays, co-immunoprecipitation with p62/SQSTM1, NF-κB reporter assay |
The Journal of biological chemistry |
Medium |
25086041
|
| 2017 |
PARP12 is a Golgi-localized mono-ADP-ribosyltransferase that reversibly translocates from the trans-Golgi network to stress granules under stress. PARP1 activation in the nucleus produces poly-ADP-ribose (PAR) polymers that directly bind the PARP12 WWE domain, driving this translocation. PARP12 departure from the Golgi causes Golgi membrane disassembly and a block in anterograde membrane traffic, which is reversible upon stress removal. |
Live-cell imaging, PARP1 inhibition/activation, PAR-binding assay via WWE domain, Golgi morphology analysis, anterograde traffic assay, drug wash-out rescue experiment |
Scientific reports |
High |
29070863
|
| 2018 |
PARP12 restricts Zika virus replication by mediating ADP-ribosylation of the viral nonstructural proteins NS1 and NS3, which triggers their proteasome-dependent degradation. Knockout of PARP12 in A549 cells enhanced Zika virus replication. |
CRISPR knockout screen (21 ISGs), individual ISG knockout in A549 cells, western blot for NS1/NS3 protein levels, proteasome inhibitor rescue experiment, ADP-ribosylation assay |
Science signaling |
High |
29921658
|
| 2018 |
PARP12 interacts with four-and-a-half LIM-only protein 2 (FHL2) via protein affinity purification. PARP12 stabilizes FHL2 protein by protecting it from ubiquitin-mediated proteasomal degradation, and this stabilization is independent of PARP12 enzymatic activity. PARP12 deficiency increases TGF-β1 expression and promotes epithelial-mesenchymal transition, increasing migration and invasion of hepatocellular carcinoma cells. |
Protein affinity purification, co-immunoprecipitation, ubiquitination assay, in vitro ADP-ribosylation assay (negative for FHL2), siRNA knockdown, in vivo metastasis model |
Cell death & disease |
Medium |
30154409
|
| 2021 |
PARP11 physically interacts with PARP12 (confirmed by co-immunoprecipitation) and promotes PARP12-mediated ADP-ribosylation and proteasomal degradation of Zika virus NS1 and NS3 proteins. In PARP11/PARP12 double-knockout cells, NS1/NS3 degradation is further impaired relative to single knockouts, demonstrating synergistic anti-Zika activity. |
PARP11/PARP12 single and double knockout HEK293T lines, co-immunoprecipitation, western blot for NS1/NS3 levels, immunofluorescence |
Cell & bioscience |
Medium |
34187568
|
| 2022 |
PARP12 mono-ADP-ribosylates Golgin-97 at an acidic cluster in its coiled-coil domain at the trans-Golgi network. This modification is required for the formation and fission of carriers transporting specific basolateral cargoes (E-cadherin and VSVG). PARP12 depletion or mutation of the Golgin-97 modification site causes accumulation of these cargoes in a trans-Golgi/Rab11-positive intermediate compartment, delaying their transport to the plasma membrane. PARP12 enzymatic activity depends on its direct phosphorylation by protein kinase D (PKD) at the TGN. |
In vitro ADP-ribosylation assay, site-directed mutagenesis of Golgin-97 acidic cluster, PARP12 depletion (siRNA/KO), cargo transport assay (E-cadherin, VSVG, TNFα), Rab11 colocalization, PKD kinase assay, PKD inhibition, phosphorylation mapping |
Proceedings of the National Academy of Sciences of the United States of America |
High |
34969853
|
| 2023 |
PARP12 knockout in mice increases replication of a coronavirus (MHV) Mac1 mutant in bone-marrow-derived macrophages and in vivo, and worsens liver pathology in A59-infected mice. This establishes PARP12 as a required innate immune restriction factor against coronavirus infection in cell culture and in animals, acting via its ADP-ribosyltransferase activity that is counteracted by the viral Mac1 macrodomain. |
PARP12-/- mouse generation, siRNA screen in BMDMs, viral replication assay, liver pathology assessment, lethality study |
Journal of virology |
High |
37398292 37695054
|
| 2023 |
PARP12 localizes near spindle poles during meiotic metaphase I and II in mouse oocytes. PARP12 depletion causes spindle disorganization, chromosome misalignment, aneuploidy, spindle assembly checkpoint activation (BubR1 signal), and reduction of F-actin in metaphase I oocytes, demonstrating a required role in meiotic spindle integrity and asymmetric division. |
Immunofluorescence (localization at GV, MI, MII), morpholino/siRNA knockdown, spindle morphology analysis, chromosome spread and aneuploidy scoring, BubR1 immunostaining, F-actin staining, transcriptomic analysis |
Journal of cellular physiology |
Medium |
37305966
|
| 2022 |
PARP12 is highly expressed in brown adipose tissue and localizes primarily to mitochondria. Knockdown of PARP12 reduces UCP1 expression and decreases mitochondrial respiration in thermogenic adipocytes, while overexpression reverses these effects. |
qRT-PCR, western blot, subcellular fractionation/immunofluorescence (mitochondrial localization), siRNA knockdown and overexpression, mitochondrial oxygen consumption assay (Seahorse) |
Adipocyte |
Low |
35916471
|
| 2024 |
PARP12 interacts with ISG15 (identified by mass spectrometry and co-immunoprecipitation) and upregulates ISGylation of mitofusin 1 and 2 (MFN1/2), which decreases MFN1/2 ubiquitination and SUMOylation, thereby inhibiting PINK1/Parkin-dependent mitophagy in chondrocytes. IRF1, activated by inflammatory cytokines, directly binds the PARP12 promoter to drive PARP12 transcription. |
Mass spectrometry, co-immunoprecipitation, ISGylation assay, ubiquitination assay, SUMOylation assay, ChIP (IRF1-PARP12 promoter), PINK1/Parkin pathway analysis, rat OA model |
Bone research |
Medium |
39465252
|
| 2025 |
PARP12 catalyzes mono-ADP-ribosylation (MARylation) of RIPK1 (in both its intermediate domain and kinase domain) and RIPK3 in cells stimulated by IFNγ and TNFα. PARP12-mediated MARylation of RIPK1 promotes RIPK1 kinase activation and its interaction with RIPK3 to promote necroptosis, while inhibiting RIPK1–caspase-8 binding to suppress apoptosis. PARP12 deficiency reduces necroptosis, sensitizes cells to apoptosis, and also promotes expression of a subset of ISGs, conferring protection against influenza A virus lethality in mice. |
Co-immunoprecipitation, in vitro MARylation assay, RIPK1/RIPK3 kinase activity assay, PARP12-/- cells and mice, necroptosis/apoptosis assays, influenza A virus infection model |
Proceedings of the National Academy of Sciences of the United States of America |
High |
40489618
|
| 2025 |
PARP12 mono-ADP-ribosylates AKT, which is required for AKT activation in oestrogen receptor-positive breast cancer cells. Transcriptional inhibition of PARP12 reduces AKT activity, increases DNA damage, augments p53 nuclear localization, promotes p53–AKT interaction, and increases FOXO1 protein levels leading to apoptotic cell death. |
ADP-ribosylation assay (AKT as substrate), PARP12 siRNA knockdown, AKT activity assay (phospho-substrate readouts), FOXO1/p53 western blot, immunofluorescence (p53 localization), co-immunoprecipitation (p53-AKT), apoptosis assay |
Cellular and molecular life sciences : CMLS |
Medium |
39847113
|
| 2025 |
PARP12 ADP-ribosylates viral RNA of chikungunya virus (positive-strand RNA virus), which inhibits translation in cell-free systems and infected fibroblasts, promotes more rapid viral RNA decay, and induces antiviral host response gene expression (acting as a novel pathogen-associated molecular pattern, PAMP). The viral macrodomain counteracts this RNA ribosylation. |
RNA ribosylation assay (PARP12), cell-free translation system, infected fibroblast translation assay, viral RNA decay assay, antiviral gene expression (qRT-PCR/RNA-seq), chikungunya virus infection model |
bioRxivpreprint |
Medium |
bio_10.1101_2025.07.18.665567
|
| 2025 |
PARP12 ADP-ribosylates approximately 150 mRNAs, including insulin mRNA, in MIN6 insulin-producing cells during inflammation. This mRNA ADP-ribosylation modifies transcript localization and halts translation, suggesting a post-transcriptional regulatory role in insulin production during insulitis. |
Proteomics/mass spectrometry, RNA ADP-ribosylation mapping (proteomics of RNA machinery), mRNA localization assay, translation assay, PARP12 induction by cytokines |
Research square (preprint)preprint |
Low |
40470236
|
| 2024 |
In RA fibroblast-like synoviocytes, elevated trans-Golgi NAD+ (resulting from QPRT deficiency) suppresses TGN-resident PARP12, leading to mTORC1-mediated protein translation and Golgi expansion. This places PARP12 downstream of TGN NAD+ availability as a regulator of protein secretion. |
QPRT knockdown, NAD+ compartment measurement, mTORC1 activity assay, Golgi morphology analysis, RA mouse model with QPRT gene therapy |
bioRxiv (preprint)preprint |
Low |
bio_10.1101_2024.10.27.24316032
|