Affinage

DIS3L

DIS3-like exonuclease 1 · UniProt Q8TF46

Round 2 corrected
Length
1054 aa
Mass
120.8 kDa
Annotated
2026-04-28
50 papers in source corpus 8 papers cited in narrative 8 extracted findings

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

DIS3L is the catalytic 3'-to-5' exoribonuclease subunit of the human cytoplasmic exosome complex, functioning as a processive RNA decay enzyme that lacks the endonuclease activity retained by its nuclear paralog DIS3 (PMID:20531389, PMID:20531386). DIS3L degrades a broad range of cytoplasmic RNA substrates—including mRNA cleavage fragments, Y RNAs, and miRNAs—particularly those bearing PAPD5-added oligo(A) tails, with substrate selectivity governed by the opposing activities of PARN (tail removal/stabilization) and PAPD5 (tail addition/targeting for decay) (PMID:26843429, PMID:28760775, PMID:30770239). Global knockout in mice causes embryonic lethality shortly after implantation due to impaired global protein synthesis, yet DIS3L is dispensable for individual cell viability and for specific tissue contexts such as the epididymal initial segment (PMID:39919786, PMID:38875746).

Mechanistic history

Synthesis pass · year-by-year structured walk · 7 steps
  1. 2010 High

    The identity and compartment specificity of the cytoplasmic exosome catalytic subunit in human cells was unknown; two concurrent studies established that DIS3L is a strictly cytoplasmic, processive 3'-to-5' exoribonuclease that associates with the exosome core and is functionally distinct from the nuclear/endonuclease-competent DIS3 paralog.

    Evidence Proteomic purification of exosome complexes, co-immunoprecipitation, subcellular fractionation, immunofluorescence, in vitro RNA cleavage assays, and siRNA knockdown in HeLa cells

    PMID:20531386 PMID:20531389

    Open questions at the time
    • Endogenous substrate repertoire beyond rRNA intermediates was not defined
    • Structural basis for lack of endonuclease activity relative to DIS3 was not resolved
    • In vivo essentiality was not assessed
  2. 2016 Medium

    The question of whether DIS3L participates in mRNA turnover was addressed by showing it degrades upstream mRNA fragments generated by ASO/RNase H1-mediated cleavage in the cytoplasm, establishing DIS3L as a bona fide mRNA decay factor.

    Evidence siRNA knockdown of exoribonucleases combined with RACE analysis of ASO-generated cleavage products in human cells

    PMID:26843429

    Open questions at the time
    • Scope of endogenous mRNA substrates remained undefined
    • Whether DIS3L and DIS3L2 are redundant for cytoplasmic mRNA fragments was not tested
  3. 2017 Medium

    The mechanism by which non-coding RNA stability is regulated in the cytoplasm was clarified: PAPD5-added oligo(A) tails on Y RNAs serve as degradation signals recognized by DIS3L, while PARN counteracts this by removing the tails, establishing the PARN–PAPD5–DIS3L regulatory axis.

    Evidence Epistatic siRNA knockdown combinations (PARN, PAPD5, DIS3L) with RT-qPCR, Northern blot, and 3'-end deep sequencing in human cells

    PMID:28760775

    Open questions at the time
    • Direct biochemical demonstration that DIS3L preferentially binds oligo(A)-tailed substrates was not provided
    • Whether other RNA classes are similarly regulated through this axis was unknown
  4. 2019 Medium

    The oligo(A)-tail surveillance mechanism was extended to miRNAs: DIS3L (along with DIS3L2) degrades PAPD5-adenylated miRNAs, and loss of these miRNAs derepresses p53 translation, linking DIS3L to cell signaling through the miRNA–p53 axis.

    Evidence siRNA knockdowns of PARN, DIS3L, DIS3L2, PAPD5 in human cells; small RNA sequencing; luciferase p53-reporter assays

    PMID:30770239

    Open questions at the time
    • Relative contributions of DIS3L versus DIS3L2 to individual miRNA substrates were not resolved
    • In vivo relevance of the DIS3L–miRNA–p53 connection was not tested
  5. 2021 Medium

    Genome-wide genetic interaction mapping revealed that DIS3L's functional network is distinct from nuclear DIS3, showing buffering relationships with transcription, RNA export, and splicing pathways that connect cytoplasmic RNA decay to upstream nuclear RNA processing.

    Evidence High-throughput siRNA library screening in DIS3L-deficient human cells with genetic interaction scoring

    PMID:34541468

    Open questions at the time
    • Molecular mechanisms underlying the genetic interactions were not dissected
    • Whether the buffering relationships reflect direct RNA substrate overlap or indirect pathway crosstalk was not determined
  6. 2024 Medium

    Tissue-specific dispensability of DIS3L was demonstrated: conditional knockout in mouse epididymal initial segment principal cells produced no defects in spermatogenesis, sperm function, or transcriptome, indicating functional redundancy or context-dependent requirement.

    Evidence Conditional Cre-lox knockout mouse; morphological analysis, sperm parameter assessment, fertility testing, RNA-seq

    PMID:38875746

    Open questions at the time
    • Identity of compensating exoribonuclease(s) in this tissue was not investigated
    • Only one tissue context was tested
  7. 2025 High

    The organismal requirement for DIS3L was established: global knockout causes post-implantation embryonic lethality in mice, yet preimplantation embryos and ES cells are viable, and the primary molecular defect is impaired global protein synthesis rather than transcriptome dysregulation, revealing a translation-linked function during development.

    Evidence Knock-in/knockout mouse models, chimeric embryo construction, ES cell derivation, RNA-seq, polysome profiling/translation assays

    PMID:39919786

    Open questions at the time
    • Mechanism by which loss of DIS3L inhibits translation without major transcriptome changes is unknown
    • Whether translation defects reflect accumulation of aberrant mRNAs or loss of pro-translational RNA species was not resolved
    • Potential redundancy with DIS3L2 during early embryogenesis was not addressed

Open questions

Synthesis pass · forward-looking unresolved questions
  • The mechanism linking DIS3L-mediated cytoplasmic RNA decay to global translation efficiency during embryogenesis remains the central unresolved question: whether the defect arises from toxic RNA accumulation, ribosome sequestration, or loss of specific regulatory RNAs is unknown.
  • No structural model of DIS3L within the cytoplasmic exosome exists
  • Complete endogenous substrate repertoire during embryonic development is undefined
  • Functional partitioning between DIS3L and DIS3L2 for overlapping substrates has not been systematically mapped

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0140098 catalytic activity, acting on RNA 5 GO:0003723 RNA binding 2
Localization
GO:0005829 cytosol 2
Pathway
R-HSA-8953854 Metabolism of RNA 5
Partners
DIS3L2EXOSC10PAPD5PARN
Complex memberships
cytoplasmic exosome

Evidence

Reading pass · 8 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
2010 hDIS3L (Dis3-like exonuclease 1) was identified as a novel catalytic subunit of the human cytoplasmic exosome complex. It localizes exclusively to the cytoplasm (in contrast to the mainly nuclear hDIS3), possesses processive 3'-to-5' exoribonuclease activity mediated by its RNB domain, and lacks the endonucleolytic activity retained by hDIS3. Knockdown of hDIS3L in HeLa cells caused accumulation of poly(A)-tailed 28S rRNA degradation intermediates, implicating it in cytoplasmic RNA decay. Proteomic analysis of immunoaffinity-purified human exosome complexes, co-immunoprecipitation, subcellular fractionation/immunofluorescence, in vitro exoribonuclease activity assays, siRNA knockdown with Northern blot readout The EMBO journal High 20531386 20531389
2010 Two distinct Dis3p homologs associate with the human exosome core: hDIS3 (predominantly nuclear) and hDIS3L (strictly cytoplasmic). Both are active 3'-to-5' exonucleases, but only hDIS3 retains endonuclease activity. The differential localization of these two paralogs reflects the compartment-specific substrate preferences of the human exosome complex. Co-immunoprecipitation, subcellular fractionation, immunofluorescence microscopy, in vitro RNA cleavage assays with purified proteins, siRNA knockdown The EMBO journal High 20531386 20531389
2016 The cytoplasmic exosome complex containing DIS3L (Dis3L1) degrades the upstream cleavage products of mRNAs generated by ASO/RNase H1-mediated cleavage. These upstream fragments, which lack 5'-cap binding complex association, are susceptible to DIS3L-mediated 3'-to-5' degradation. Upstream cleavage products of nuclear lncRNA Malat1 were instead degraded by the nuclear exosome containing DIS3. siRNA knockdown of individual exoribonucleases combined with RACE analysis of cleavage products in cells treated with antisense oligonucleotides or siRNA Nucleic acids research Medium 26843429
2017 DIS3L (cytoplasmic exonuclease) is required for the degradation of Y RNAs that carry oligoadenylated tails added by the poly(A) polymerase PAPD5. Depletion of PAPD5 or DIS3L rescues Y RNA levels lost upon PARN depletion, establishing that PARN stabilizes Y RNAs by removing PAPD5-added tails that would otherwise recruit DIS3L for degradation. siRNA knockdown of PARN, PAPD5, and DIS3L; RT-qPCR and Northern blot for Y RNA levels; deep sequencing of 3' ends Molecular and cellular biology Medium 28760775
2019 DIS3L is one of two cytoplasmic exonucleases (along with DIS3L2) that degrade miRNAs carrying oligo(A) tails added by PAPD5. PARN removes these tails to stabilize miRNAs; in its absence, PAPD5-added tails recruit DIS3L or DIS3L2 for miRNA degradation. Loss of DIS3L-regulated miRNAs that repress p53 translation leads to p53 accumulation, linking DIS3L to p53 pathway control. siRNA knockdown of PARN, DIS3L, DIS3L2, PAPD5 in human cells; small RNA sequencing; luciferase reporter assays for p53 regulation; Dicer-dependent epistasis Molecular cell Medium 30770239
2021 Genome-wide siRNA screening revealed that DIS3L has distinct genetic interactions compared to nuclear DIS3: DIS3L genetic interactions disclose interplay of cytoplasmic RNA degradation with nuclear RNA processing, whereas DIS3 mutations suppress RNA splicing deficiency. DIS3L also shows genetic buffering interactions with transcription, RNA export, and splicing pathways. High-throughput siRNA library screening in DIS3L-deficient cells; genetic interaction scoring across RNA metabolism gene library iScience Medium 34541468
2024 Conditional knockout of DIS3L specifically in the principal cells of the epididymal initial segment in mice did not affect spermatogenesis, sperm maturation, sperm motility, acrosome reaction, or male fertility, and produced no major transcriptome changes in the initial segment, demonstrating that DIS3L-mediated cytoplasmic RNA degradation is dispensable in this tissue context. Conditional knockout mouse model (Cre-lox); morphological analyses, sperm parameter assessment, fertility testing, RNA-seq transcriptome analysis Reproductive biology Medium 38875746
2025 Global knockout of DIS3L in mice causes severe embryo degeneration and death shortly after implantation, establishing that DIS3L is essential for mammalian development. However, DIS3L is not required for cell viability per se: preimplantation Dis3l-/- embryos develop normally and can produce functional embryonic stem cells. Dis3l KO leads to inhibition of global protein synthesis without major transcriptome changes in ES cells or blastocysts, pointing to a role in mRNA metabolism critical for translation during embryogenesis. DIS3L in mice is confirmed as a subunit of the cytoplasmic exosome complex. Knock-in and knockout mouse models; chimeric embryo construction; immunofluorescence; RNA-seq; polysome/translation assays; embryonic stem cell derivation RNA (New York, N.Y.) High 39919786

Source papers

Stage 0 corpus · 50 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
2002 Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. Proceedings of the National Academy of Sciences of the United States of America 1479 12477932
2015 The BioPlex Network: A Systematic Exploration of the Human Interactome. Cell 1118 26186194
2017 Architecture of the human interactome defines protein communities and disease networks. Nature 1085 28514442
2015 A human interactome in three quantitative dimensions organized by stoichiometries and abundances. Cell 1015 26496610
2003 Complete sequencing and characterization of 21,243 full-length human cDNAs. Nature genetics 754 14702039
2021 Dual proteome-scale networks reveal cell-specific remodeling of the human interactome. Cell 705 33961781
2011 Phylogenetic-based propagation of functional annotations within the Gene Ontology consortium. Briefings in bioinformatics 656 21873635
2018 High-Density Proximity Mapping Reveals the Subcellular Organization of mRNA-Associated Granules and Bodies. Molecular cell 580 29395067
2020 Comparative host-coronavirus protein interaction networks reveal pan-viral disease mechanisms. Science (New York, N.Y.) 564 33060197
2010 The human core exosome interacts with differentially localized processive RNases: hDIS3 and hDIS3L. The EMBO journal 224 20531386
2015 A deep proteomics perspective on CRM1-mediated nuclear export and nucleocytoplasmic partitioning. eLife 198 26673895
2012 Germline mutations in DIS3L2 cause the Perlman syndrome of overgrowth and Wilms tumor susceptibility. Nature genetics 185 22306653
2013 The exoribonuclease Dis3L2 defines a novel eukaryotic RNA degradation pathway. The EMBO journal 169 23503588
2013 Exonuclease hDIS3L2 specifies an exosome-independent 3'-5' degradation pathway of human cytoplasmic mRNA. The EMBO journal 126 23756462
2022 Human transcription factor protein interaction networks. Nature communications 123 35140242
2010 Dis3-like 1: a novel exoribonuclease associated with the human exosome. The EMBO journal 119 20531389
2017 The human cytoplasmic dynein interactome reveals novel activators of motility. eLife 118 28718761
2007 Toward a confocal subcellular atlas of the human proteome. Molecular & cellular proteomics : MCP 114 18029348
2019 Systematic bromodomain protein screens identify homologous recombination and R-loop suppression pathways involved in genome integrity. Genes & development 110 31753913
2016 Meta-analysis of gene-environment-wide association scans accounting for education level identifies additional loci for refractive error. Nature communications 109 27020472
2012 Charting the landscape of tandem BRCT domain-mediated protein interactions. Science signaling 92 22990118
2014 Human-chromatin-related protein interactions identify a demethylase complex required for chromosome segregation. Cell reports 80 24981860
2020 Interactome Mapping Provides a Network of Neurodegenerative Disease Proteins and Uncovers Widespread Protein Aggregation in Affected Brains. Cell reports 79 32814053
2019 The RNase PARN Controls the Levels of Specific miRNAs that Contribute to p53 Regulation. Molecular cell 61 30770239
2004 Sequence comparison of human and mouse genes reveals a homologous block structure in the promoter regions. Genome research 57 15342556
2016 RNA cleavage products generated by antisense oligonucleotides and siRNAs are processed by the RNA surveillance machinery. Nucleic acids research 56 26843429
2001 Prediction of the coding sequences of unidentified human genes. XXII. The complete sequences of 50 new cDNA clones which code for large proteins. DNA research : an international journal for rapid publication of reports on genes and genomes 49 11853319
2010 Addition of poly(A) and poly(A)-rich tails during RNA degradation in the cytoplasm of human cells. Proceedings of the National Academy of Sciences of the United States of America 47 20368444
2022 NUDT21 limits CD19 levels through alternative mRNA polyadenylation in B cell acute lymphoblastic leukemia. Nature immunology 46 36138187
2016 Defining the Protein-Protein Interaction Network of the Human Protein Tyrosine Phosphatase Family. Molecular & cellular proteomics : MCP 36 27432908
2017 PARN Modulates Y RNA Stability and Its 3'-End Formation. Molecular and cellular biology 31 28760775
2005 Transcriptome analysis of human gastric cancer. Mammalian genome : official journal of the International Mammalian Genome Society 24 16341674
2014 Discovery of genetic biomarkers contributing to variation in drug response of cytidine analogues using human lymphoblastoid cell lines. BMC genomics 23 24483146
2018 Major 3'-5' Exoribonucleases in the Metabolism of Coding and Non-coding RNA. Progress in molecular biology and translational science 22 30340785
2014 Zfx facilitates tumorigenesis caused by activation of the Hedgehog pathway. Cancer research 22 25164012
2019 The Implication of mRNA Degradation Disorders on Human DISease: Focus on DIS3 and DIS3-Like Enzymes. Advances in experimental medicine and biology 21 31342438
2019 Proximity interactions of the ubiquitin ligase Mind bomb 1 reveal a role in regulation of epithelial polarity complex proteins. Scientific reports 20 31462741
2021 A novel p53 regulator, C16ORF72/TAPR1, buffers against telomerase inhibition. Aging cell 19 33660365
2025 Multimodal cell maps as a foundation for structural and functional genomics. Nature 18 40205054
2019 A role for DIS3L2 over natural nonsense-mediated mRNA decay targets in human cells. Biochemical and biophysical research communications 13 31466720
2013 Modulating the RNA processing and decay by the exosome: altering Rrp44/Dis3 activity and end-product. PloS one 10 24265673
2017 Novel polymorphisms associated with hyperalphalipoproteinemia and apparent cardioprotection. Journal of clinical lipidology 9 29198934
2021 Landscape of functional interactions of human processive ribonucleases revealed by high-throughput siRNA screenings. iScience 5 34541468
2020 The Bacterial Counterparts of the Eukaryotic Exosome: An Evolutionary Perspective. Methods in molecular biology (Clifton, N.J.) 5 31768970
2024 Loss of DIS3L in the initial segment is dispensable for sperm maturation in the epididymis and male fertility. Reproductive biology 4 38875746
2022 How hydrolytic exoribonucleases impact human disease: Two sides of the same story. FEBS open bio 4 35247037
2025 DIS3L, cytoplasmic exosome catalytic subunit, is essential for development but not cell viability in mice. RNA (New York, N.Y.) 2 39919786
2024 A Comparative Overview of the Role of Human Ribonucleases in Nonsense-Mediated mRNA Decay. Genes 2 39457432
2025 Structural and mechanistic insights into Dis3L2-mediated degradation of structured RNA. RNA (New York, N.Y.) 0 41033841
2020 [Thyroid disruptor p, p'-DDE inhibited the expression of LHX4 and DIS3L protein in Nthy-ori-3-1 cells]. Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases 0 32892578