| 2000 |
SP110 localizes to PML-Sp100 nuclear bodies in ATRA-treated NB4 cells, and an SP110 DNA-binding domain fusion protein activates transcription of a reporter gene in transfected mammalian cells. SP110 also markedly increases ATRA-mediated expression of a reporter gene containing a retinoic acid response element, indicating SP110 functions as a nuclear hormone receptor transcriptional coactivator. |
Immunofluorescence localization, transfection-based luciferase/reporter assay, ATRA treatment of NB4 cells |
Molecular and cellular biology |
Medium |
10913195
|
| 2006 |
Loss-of-function mutations in SP110 (truncating and other mutations) cause veno-occlusive disease with immunodeficiency (VODI), characterized by severe hypogammaglobulinemia, combined T and B cell immunodeficiency, absent germinal centers, absent plasma cells, and hepatic veno-occlusive disease, establishing SP110 as required for normal immune development. |
Human genetics/Sanger sequencing of SP110 in VODI patients; clinical and immunological phenotyping |
Nature genetics |
High |
16648851
|
| 2012 |
SP110 deficiency in human B cells compromises their ability to respond to T cell-dependent stimuli (CD40L, IL-21) and differentiate into immunoglobulin-secreting plasma cells in vitro, as demonstrated using cells from VODI patients with SP110 mutations. Analysis of 4 new alleles confirmed VODI is caused by reduced functional SP110 protein levels. Mutant SP110 proteins are subject to enhanced proteasomal degradation. |
Immunofluorescence of transfected mutant proteins in HEp-2 cells; flow cytometry B-cell phenotyping; B-cell stimulation assays; gene expression arrays |
The Journal of allergy and clinical immunology |
High |
22621957
|
| 2017 |
SP110 is SUMO1-modified and resides in PML nuclear bodies in a SUMOylated state. During HBV infection, HBx protein interacts with SP110 and drives deSUMOylation-dependent release of SP110 from PML-NBs. SP110 knockdown reduces viral DNA load by activating the type I interferon response pathway. SP110 regulates HBx direct target genes, and the SP110-HBx interaction is required for HBx recruitment to the promoters of co-regulated genes, where HBx modulates recruitment of p300/HDAC1 to alter host gene expression in favor of viral persistence. |
Co-immunoprecipitation (SP110-HBx interaction), immunofluorescence (SP110 localization), SUMO1 modification assay, SP110 knockdown with viral load quantification, ChIP (HBx and p300/HDAC1 promoter recruitment) |
The Journal of biological chemistry |
High |
29046350
|
| 2017 |
SP110 interacts with HSP5 (Hspa5/BiP) to activate endoplasmic reticulum (ER) stress-induced apoptosis in mouse macrophages, which is essential for Sp110-enhanced resistance to M. tuberculosis. SP110 also interacts with RNA-binding protein Ncl (nucleolin) and promotes its degradation, thereby downregulating Bcl2 (normally stabilized by Ncl). Additionally, SP110 promotes degradation of ribosomal protein Rps3a, upregulating pro-apoptotic PARP activity. Inhibition of the ER stress pathway abolished SP110-enhanced macrophage apoptosis and increased intracellular Mtb survival. |
Proteomics/MS (253 interacting proteins identified), Co-immunoprecipitation, ER stress pathway inhibition, macrophage overexpression, Mtb survival assay, transgenic cattle macrophages |
Oncotarget |
Medium |
28969051
|
| 2018 |
The N-terminal fragment (amino acids 1–276) of SP110 interacts with p50 (an NF-κB subunit) in the cytoplasm, and this interaction is required for downregulation of p50-driven TNF-α promoter activity. Different SP110 isoforms have distinct effects on NF-κB-mediated transcription. The middle region of SP110 contains a nucleolar localization signal (NoLS) with monopartite and bipartite NLS elements that directs SP110 to the nucleolus under certain conditions, whereas the middle and C-terminal regions also govern localization to other cellular compartments. |
Luciferase reporter assay (deletion mutants), co-immunoprecipitation, confocal microscopy (GFP-tagged SP110 mutants), Western blotting |
Journal of biomedical science |
Medium |
29642903
|
| 2024 |
UBR7 E3 ubiquitin ligase ubiquitinates SP110 at critical residues within its SAND domain. This ubiquitination of SP110 downregulates genes in the type I interferon response pathway. Wild-type but not ubiquitination-defective mutant SP110 is recruited to type I interferon response pathway gene promoters. Silencing UBR7 induces IRF7 phosphorylation and augments IFN-β and downstream ISGs, confirming that UBR7-mediated SP110 ubiquitination suppresses IFN-β immune signaling during HBV infection. |
In vitro ubiquitination assay, RNA-seq (UBR7/SP110 knockdown), Co-IP (UBR7-SP110 interaction), site-directed mutagenesis (ubiquitination-defective SP110), ChIP (SP110 promoter recruitment), scRNA-seq patient data analysis |
ACS infectious diseases |
High |
38938101
|
| 2024 |
In M. tuberculosis-infected THP-1 macrophages, depletion of SP110 (and/or SP140) impairs induction of inflammatory response genes including type I IFN response genes, while genes related to phosphorylation are upregulated upon SP110/SP140 knockdown. This establishes human SP110 as a positive transcriptional regulator of inflammatory/IFN response genes during Mtb infection. |
Genome-wide transcriptional profiling, RT-qPCR, ELISA, siRNA knockdown of SP110 and/or SP140 in THP-1 macrophages infected with M. tuberculosis |
Microbiology spectrum |
Medium |
39162523
|
| 2016 |
SP110 regulates transcription of macrophage genes involved in immune responses, apoptosis, defense, and inflammatory responses upon Mtb infection. SP110 upregulates the pro-apoptotic factor Bmf by inhibiting miR-125a, and forced Bmf expression induces macrophage apoptosis, placing SP110 upstream of a miRNA-Bmf-apoptosis axis. |
Integrated transcriptome analysis, miRNA expression profiling, Bmf overexpression/knockdown, apoptosis assay in RAW264.7 macrophages |
Scientific reports |
Medium |
26912204
|
| 2026 |
SP110 is a potent inhibitor of type I interferon-driven cell death that counteracts a toxic activity of SP100. Loss of SP110 leads to mitotic retention of SP100 and PML nuclear bodies, which associate with segregating chromosomes, causing micronucleus formation, DNA damage, and genotoxic cell death. Cryo-EM and AlphaFold modelling combined with cellular biochemistry demonstrate that SP110 dissolves toxic SP100 oligomers via direct interactions between their CARD (caspase activation and recruitment) domains, establishing a structural mechanism for PML body disassembly during mitosis. |
Genome-wide CRISPR-Cas9 genetic screen (triphosphorylated RNA stimulation), cryo-electron microscopy, AlphaFold structural modelling, cellular biochemistry (Co-IP, domain mapping), live-cell imaging (mitotic SP100/PML retention), micronucleus assay, DNA damage assay |
Nature cell biology |
High |
41826696
|
| 2007 |
SP110 expression is induced by Anaplasma phagocytophilum infection of human HL-60 promyelocytic cells, and siRNA-mediated knockdown of SP110 reduces A. phagocytophilum infection and multiplication, demonstrating that SP110 is required for this intracellular pathogen to establish infection. |
Real-time RT-PCR, RNA interference (siRNA knockdown), quantitative PCR of bacterial load |
BMC infectious diseases |
Low |
17883869
|
| 2015 |
Transgenic cattle with SP110 knocked into their genome via TALE nickase-mediated homologous recombination control growth and multiplication of Mycobacterium bovis, shift cell death from necrosis to apoptosis upon infection, and resist low-dose M. bovis transmission in vivo, demonstrating that SP110 expression promotes the apoptotic pathway and confers tuberculosis resistance at the organismal level. |
TALEN-mediated genome knockin (homologous recombination), in vitro and in vivo M. bovis challenge, apoptosis/necrosis pathway analysis |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
25733846
|
| 2025 |
Species-specific alternative splicing of the bovine SP110 gene produces a truncated bSP110c variant that lacks the SAND domain required for anti-tuberculosis function. This truncated isoform predominates in dairy cattle due to a ruminant-specific absence of a pre-SAND exon, which promotes bSP110c splicing. Substituting the pre-SAND region with human or equine sequences suppresses bSP110c and increases bSP110a/b expression, while bSP110c shows significantly reduced resistance to M. bovis compared to bSP110a and bSP110b. |
RT-PCR splice variant characterization, minigene splicing assay, M. bovis infection assay comparing isoforms, domain deletion analysis (SAND domain), sequence substitution experiments |
Veterinary research |
Medium |
41382217
|