| 1996 |
PSO4 is allelic to PRP19 in S. cerevisiae, encoding a spliceosome-associated protein essential for viability; loss-of-function causes sensitivity to DNA cross-linking agents, blocked sporulation, and reduced mutagenesis, placing PSO4/PRP19 at the intersection of pre-mRNA splicing and DNA repair pathways |
Genetic complementation, gene disruption, sequence analysis |
Nucleic acids research |
High |
8918805
|
| 2003 |
Human Pso4 (hPso4/PRPF19) binds double-stranded DNA in a sequence-nonspecific manner (but not single-stranded DNA), is induced by gamma radiation and chemical mutagens, and its loss via siRNA causes accumulation of DNA double-strand breaks and apoptosis, establishing a direct role in mammalian DSB repair |
DNA binding assay (purified protein), siRNA knockdown, comet assay, cell survival assay |
Proceedings of the National Academy of Sciences of the United States of America |
High |
12960389
|
| 2005 |
The Pso4/Prp19 complex (composed of Pso4/Prp19, Cdc5L, Plrg1, and Spf27) is required for processing of DNA interstrand cross-links in vitro, and interacts physically with WRN helicase through a direct association between WRN and Cdc5L; WRN helicase activity (but not exonuclease activity) is required for ICL processing |
Biochemical ICL processing assay (in vitro), co-immunoprecipitation, pulldown, mutagenesis of WRN |
The Journal of biological chemistry |
High |
16223718
|
| 2005 |
SNEV/PRPF19 is the human ortholog of yeast Prp19; its homo-oligomerization (self-interaction domain mapped to amino acids 56–74) is essential for spliceosome assembly and stability, as demonstrated by immunodepletion from HeLa nuclear extracts abolishing in vitro splicing and synthetic peptides from the self-interaction domain inhibiting spliceosome formation |
Immunodepletion of nuclear extracts, in vitro splicing assay, yeast complementation, synthetic peptide inhibition, mapping of self-interaction domain |
Nucleic acids research |
High |
16332694
|
| 2005 |
SNEV/PRPF19 associates with the proteasome by directly binding the beta7 subunit (PSMB4) of the 20S proteasome; SNEV exhibits E3 ligase activity in vivo and escorts ubiquitinated substrates to the proteasome, with co-localization increasing upon proteasome inhibition |
Co-immunoprecipitation, immunofluorescence co-localization, in vitro E3 ligase assay |
The Biochemical journal |
High |
15660529
|
| 2007 |
hPrp19 forms a ubiquitylated oligomeric species (likely via thiolester between ubiquitin and a cysteine residue) that is enhanced by DNA damage; ubiquitylated hPrp19 fails to interact with Cdc5L or Plrg1, indicating DNA damage induces structural alterations to the Prp19 core complex; overexpression of hPrp19 reduces apoptosis after DNA damage |
SDS-PAGE under non-reducing conditions, chromatin fractionation, co-immunoprecipitation, overexpression/apoptosis assay |
Biochemical and biophysical research communications |
Medium |
17276391
|
| 2008 |
hPso4/PRPF19 forms a stable complex with Metnase (SETMAR) on both TIR and non-TIR DNA; hPso4 is required to localize Metnase to DSB sites after ionizing radiation; hPso4 depletion abolishes Metnase-mediated stimulation of DNA end joining coupled to genomic integration |
Co-immunoprecipitation, siRNA knockdown, immunofluorescence colocalization, DNA end-joining assay |
The Journal of biological chemistry |
High |
18263876
|
| 2010 |
In the Metnase-hPso4 complex, hPso4 is solely responsible for DNA binding; hPso4 negatively regulates Metnase's TIR-specific DNA binding activity, and Metnase's DNA binding is not required for formation of the Metnase-hPso4-DNA complex; the complex is competitively inhibited by both TIR and non-TIR DNA |
Electrophoretic mobility shift assay, stoichiometric analysis, competition assay |
Archives of biochemistry and biophysics |
Medium |
20416268
|
| 2011 |
Exo70 (a subunit of the exocyst complex) directly interacts with SNEV/PRPF19 via its N-terminal 100 amino acids, shuttles to the nucleus, associates with the spliceosome, and addition of Exo70 N-terminal peptides inhibits pre-mRNA splicing in vitro; Exo70 influences splice site selection in vivo |
Co-immunoprecipitation, pulldown, in vitro splicing assay, minigene splicing assay, immunofluorescence |
The Biochemical journal |
Medium |
21639856
|
| 2012 |
SNEV/PRPF19 is phosphorylated at S149 in an ATM-dependent manner in response to oxidative stress and DSB-inducing agents; S149 phosphorylation is necessary for resistance to apoptosis upon oxidative stress and is partially required for cellular lifespan extension |
Mass spectrometry (phosphorylation site identification), ATM inhibition, phosphorylation-deficient point-mutant overexpression, apoptosis assay, lifespan assay |
Aging |
Medium |
22529335
|
| 2014 |
Both BCAS2 and PSO4 subunits of the PSO4 core complex directly interact and colocalize with RPA; depletion of BCAS2 or PSO4 impairs ATRIP recruitment to DNA damage sites and compromises CHK1 activation and RPA2 phosphorylation; the RPA1-binding ability of BCAS2 and E3 ligase activity of PSO4 are both required for efficient ATRIP accumulation and downstream ATR signaling |
Co-immunoprecipitation, immunofluorescence, siRNA knockdown, CHK1/RPA2 phosphorylation assay, domain mutagenesis |
The Journal of biological chemistry |
High |
24443570
|
| 2014 |
The hPso4 complex is required for timely S-phase progression, G2/M checkpoint transition, and repair of DSBs by homologous recombination; hPso4 depletion delays replication restart after hydroxyurea-induced fork stalling, reduces BRCA1 levels, and decreases ssDNA generation at DSBs |
siRNA knockdown, flow cytometry (cell cycle), γ-H2AX assay, hydroxyurea treatment, PARP inhibitor sensitivity, HR reporter assay |
The Journal of biological chemistry |
Medium |
24675077
|
| 2018 |
Prp19/PRPF19 is autoinhibited as a homotetramer; stepwise assembly of SPF27, CDC5L, and PLRG1 onto the Prp19 tetramer activates its E3 ubiquitin ligase activity; the elongated coiled coils of Prp19 serve as the assembly axis for SPF27 and CDC5L; communication between PLRG1 and Prp19 enables E3 activity |
Crystal structure, cryo-EM/SAXS, mutagenesis, in vitro ubiquitin ligation assay, protein crosslinking mass spectrometry |
Molecular cell |
High |
29547724
|
| 2021 |
PRPF19 knockdown causes a switch in MDM4 splicing from the stable full-length MDM4-FL to the unstable MDM4-S isoform (lacking exon 6), activating p53-p21 pathway and inducing cellular senescence; PRPF19 promotes MDM4 full-length splicing by facilitating physical interaction between splicing factors PRPF3 and PRPF8 (components of U4/U6.U5 tri-snRNP) |
siRNA knockdown, RNA-sequencing, RT-PCR, co-immunoprecipitation, western blot, cell cycle analysis |
The Journal of biological chemistry |
High |
34144037
|
| 2021 |
Prpf19 promotes poly-ubiquitination and proteasomal degradation of mutant ATXN3-polyQ protein; nuclear localization of Prpf19 is essential for this modulatory function; Exoc7/Exo70 interacts with Prpf19 and antagonizes its E3 ligase function toward ATXN3-polyQ |
Overexpression/knockdown in mammalian and Drosophila models, ubiquitination assay, immunofluorescence (nuclear localization), co-immunoprecipitation |
Cell death & disease |
Medium |
33542212
|
| 2022 |
PRPF19 recruits E3 ubiquitin ligase MARCH8 to the PEDV N (capsid) protein for ubiquitination; the ubiquitinated N protein is recognized by cargo receptor NDP52 and transported to autolysosomes for selective autophagy-mediated degradation, thereby inhibiting PEDV replication |
Co-immunoprecipitation, ubiquitination assay, siRNA knockdown, overexpression, autophagy flux assay |
Journal of virology |
Medium |
36541804
|
| 2023 |
PRPF19 ubiquitinates MYL9 via K63-linked ubiquitination, enhancing MYL9 stability; the PRPF19/MYL9 axis activates the Src-YAP1 signaling cascade to promote colorectal cancer cell migration and invasion |
Co-immunoprecipitation, ubiquitination assay (K63-specific), gain/loss-of-function assays, migration/invasion assays |
Cell death & disease |
Medium |
37031206
|
| 2024 |
PRPF19 functions as a substrate recognition receptor for a CRL4B E3 ligase complex (with CUL4B, DDB1, RBX1) that catalyzes ubiquitination and proteasomal degradation of SARS-CoV-2 ORF6; PRPF19 overexpression promotes ORF6 degradation, releases ORF6-mediated IFN inhibition, and inhibits SARS-CoV-2 replication |
Pulldown (identifying interacting partners), co-immunoprecipitation, ubiquitination assay, overexpression, viral replication assay, mouse infection model |
mBio |
Medium |
38265236
|
| 2025 |
PRPF19 mediates ubiquitination and proteasomal degradation of VDR (vitamin D receptor); loss of VDR reduces GPX4 expression and promotes ferroptosis in renal tubular epithelial cells in diabetic nephropathy; berberine identified as a PRPF19 inhibitor by molecular docking, affinity bead technology, and surface plasmon resonance |
Proteomics, luciferase reporter assay, chromatin immunoprecipitation, ubiquitination assay, VDR knockout, SPR, molecular docking |
Cell communication and signaling : CCS |
Medium |
40414879
|
| 2024 |
The 5' UTR of PRPF19 mRNA contains an upstream open reading frame (uORF) that is translated in human cells; inactivation of this uORF reduces cell viability, indicating the microprotein or uORF regulatory function is important for cell survival |
Ribosome profiling data analysis, uORF inactivation, cell viability assay |
Doklady. Biochemistry and biophysics |
Low |
38472668
|