Affinage

DND1

Dead end protein homolog 1 · UniProt Q8IYX4

Length
353 aa
Mass
38.7 kDa
Annotated
2026-06-09
45 papers in source corpus 18 papers cited in narrative 18 extracted findings
Cross-family judge vs UniProt: Affinage preferred faithfulness: 6/6 claims corpus-supported (100%)

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

DND1 is a vertebrate-conserved RNA-binding protein that controls the fate and survival of primordial germ cells (PGCs) by binding uridine-rich and structured motifs in target mRNA 3' UTRs and exerting opposing post-transcriptional outcomes (PMID:18155131, PMID:28297718). In its protective mode, DND1 binds U-rich 3' UTR regions and physically occludes miRNA access to their target sites, shielding bound mRNAs from miRNA-mediated repression (PMID:18155131). In its destabilizing mode, DND1 recognizes a UU(A/U) motif and recruits the CCR4-NOT (CNOT) deadenylase complex to promote decay of pro-apoptotic and pro-inflammatory mRNAs, an activity essential for the survival of mouse PGCs and spermatogonial stem cells (PMID:28297718). Target selection and high-affinity recognition are conferred by partner Nanos proteins: NANOS2 binds RNA-bound DND1 and is required both for CNOT recruitment and for joint target selection (PMID:35705038), while DND1 together with NANOS3 builds a high-information-content recognition surface that specifically reads an AUGAAUU heptanucleotide (N3-DRE), resolved at atomic resolution in a ternary complex with CDK1 3' UTR RNA and shown by in vivo editing to be required for Cdk1 repression in PGCs (PMID:41040373). Through these activities DND1 coordinates regulons of cell-cycle regulators and epigenetic enzymes—stabilizing p27/p21 to enforce mitotic arrest (PMID:21115610) and maintaining Ezh2/H3K27me3 to prevent teratoma-forming reprogramming (PMID:29378702). DND1 also localizes nanos3 RNA to the ribosome-rich periphery of phase-separated germ granules, an activity required for germ cell fate (PMID:37463577), and its RRM2 domain adopts a non-canonical fold stabilized by 3D domain swapping (PMID:33860980).

Mechanistic history

Synthesis pass · year-by-year structured walk · 11 steps
  1. 2007 High

    Established the first molecular activity for DND1: that it acts as an mRNA-protective factor by blocking miRNA access rather than as a generic RNA chaperone.

    Evidence RNA-binding and miRNA reporter assays in human cells plus loss-of-function in zebrafish PGCs

    PMID:18155131

    Open questions at the time
    • Did not define the precise binding motif
    • Did not reconcile protection with later destabilizing activity
  2. 2010 Medium

    Connected DND1 RNA binding to cell-cycle control by showing it stabilizes p27/p21 transcripts to enforce germ cell mitotic arrest.

    Evidence RIP and immunostaining of p27/p21 in Dnd1(Ter/Ter) mutant germ cells

    PMID:21115610

    Open questions at the time
    • Mechanism of stabilization not defined
    • Single lab, no biochemical reconstitution
  3. 2012 Medium

    Linked DND1 to epigenome maintenance, showing it suppresses miR-26a inhibition of Ezh2 to preserve H3K27me3 and block teratoma-forming reprogramming.

    Evidence Dnd1 mutant mouse, H3K27me3 ChIP, Ezh2 western blot, Ezh2/Ccnd1 rescue

    PMID:29378702

    Open questions at the time
    • Direct DND1-Ezh2 mRNA binding not shown in this study
    • Single lab
  4. 2017 High

    Resolved the destabilizing arm of DND1 function by defining the UU(A/U) motif and demonstrating direct CCR4-NOT recruitment required for PGC survival.

    Evidence PAR-CLIP, reciprocal Co-IP of CCR4-NOT, loss-of-function mouse genetics with transcriptomics

    PMID:28297718

    Open questions at the time
    • Did not explain how DND1 chooses between protection and decay
    • Did not resolve structural basis of motif recognition
  5. 2017 Medium

    Provided cell-context examples of competitive miRNA blocking and 3' UTR stabilization beyond germline, in cancer cell systems.

    Evidence 3'UTR binding/mutagenesis, mRNA stability and knockdown assays in MCF-7 (Bim/miR-221) and HCC (LATS2/Hippo) cells

    PMID:28191469 PMID:28593479

    Open questions at the time
    • LATS2 binding method incompletely described (Low confidence)
    • Generalizability to physiological germline targets unclear
  6. 2018 Medium

    Identified specific DND1 residues whose mutation abolishes protein stability and protein-protein interactions and depletes PGCs, mapping functional determinants in vivo.

    Evidence CRISPR base-editing in mice, PGC depletion phenotype, protein stability and Co-IP assays

    PMID:30275529

    Open questions at the time
    • Did not assign mutated residues to specific structural elements
    • Single lab
  7. 2019 Medium

    Generated a genome-wide direct-target map showing DND1 simultaneously downregulates pluripotency/cell-cycle mRNAs and promotes chromatin-regulator mRNAs for male germ cell differentiation.

    Evidence DO-RIP-Seq and RNA-seq in Dnd1 Ter/Ter male germ cells

    PMID:31253634

    Open questions at the time
    • Did not separate direct vs indirect transcriptomic effects mechanistically
    • Single lab
  8. 2021 High

    Provided the first atomic view of a DND1 domain, revealing RRM2 is non-canonical and forms a 3D domain-swapped dimer.

    Evidence 2.3-Å X-ray crystallography, NMR, MD simulations

    PMID:33860980

    Open questions at the time
    • Functional role of the domain-swapped dimer in RNA binding not established
    • Did not include full-length protein or RNA
  9. 2022 Medium

    Defined NANOS2 as a second-layer adaptor that selects targets with DND1 and recruits CNOT, showing DND1 specificity is partner-dependent.

    Evidence Reciprocal Co-IP, somatic reporter system, NANOS2-NIM-DND1 fusion repression assays

    PMID:35705038

    Open questions at the time
    • Structural basis of NANOS2-DND1-RNA recognition not resolved here
    • Single lab
  10. 2023 Medium

    Connected DND1 to germ-granule biology and to regulon-level coordination, localizing nanos3 RNA to the ribosome-rich granule periphery and identifying epigenetic-enzyme target classes.

    Evidence In vivo live imaging in zebrafish; RIP-seq with DND1-GFP knock-in and time-course RNA-seq in mouse male germ cells

    PMID:36857387 PMID:37463577

    Open questions at the time
    • Mechanism of peripheral RNA localization not defined
    • Functional consequence of each target regulon not individually validated
  11. 2025 High

    Resolved how high-affinity sequence specificity arises, showing DND1+NANOS3 jointly read an AUGAAUU N3-DRE motif required for Cdk1 repression, and extended the complex to translational repression in human PGCs.

    Evidence Tandem PAR-CLIP and 1.7-Å ternary crystal structure with in vivo N3-DRE editing (bioRxiv preprint); Co-IP, P-body localization and 4E-T assays in human iPSC-derived PGCLCs

    PMID:40410171 PMID:41040373

    Open questions at the time
    • Ternary structure findings from a preprint
    • How DND1 partitions between CNOT decay, 4E-T translational repression, and miRNA blocking on different targets not unified

Open questions

Synthesis pass · forward-looking unresolved questions
  • It remains unresolved what determines whether DND1 protects an mRNA from miRNAs, recruits CNOT for decay, or drives 4E-T-mediated translational repression on a given target.
  • Switch between protection and repression undefined
  • Role of RRM2 domain-swapped dimer in target selection unknown

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0003723 RNA binding 6 GO:0048018 receptor ligand activity 2 GO:0140098 catalytic activity, acting on RNA 2
Localization
GO:0005829 cytosol 3
Pathway
R-HSA-8953854 Metabolism of RNA 4 R-HSA-1474165 Reproduction 3
Partners
APOBEC3CNOTEIF4ENIF1NANOS2NANOS3
Complex memberships
CCR4-NOT (CNOT) deadenylase complexDND1-NANOS2 RNPDND1-NANOS3 RNP

Evidence

Reading pass · 18 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
2007 DND1 (Dead end 1) binds uridine-rich regions in the 3' UTRs of target mRNAs and physically blocks miRNA access to their target sites, thereby preventing miRNA-mediated repression of those mRNAs. This was demonstrated in human cells and in primordial germ cells of zebrafish. RNA-binding assays, functional miRNA reporter assays, loss-of-function in zebrafish PGCs Cell High 18155131
2017 DND1 binds a UU(A/U) trinucleotide motif predominantly in the 3' UTRs of mRNAs and destabilizes target mRNAs through direct recruitment of the CCR4-NOT deadenylase complex. The degree of suppression scales with the number of DND1-binding sites. This mRNA destabilization is required for survival of mouse PGCs and spermatogonial stem cells by suppressing pro-apoptotic and pro-inflammatory target mRNAs. PAR-CLIP/transcriptomic analysis, co-immunoprecipitation of CCR4-NOT complex, loss-of-function mouse genetics with transcriptomic readout Nature High 28297718
2010 DND1 directly binds transcripts encoding the cell cycle inhibitors p27(Kip1) and p21(Cip1), and loss of DND1 (Ter mutation) results in significantly decreased p27 and p21 protein levels in male germ cells, indicating DND1 promotes translational stabilization of these cell cycle regulators to enforce mitotic arrest. RNA immunoprecipitation (RIP), immunostaining of p27/p21 protein in Dnd1(Ter/Ter) mutant germ cells, genetic mouse models Development (Cambridge, England) Medium 21115610
2008 DND1 co-immunoprecipitates APOBEC3 from mammalian cells and from mouse gonads, and the two proteins co-localize to the cytoplasm at peri-nuclear sites when co-expressed. Whether interaction is direct or indirect was not determined. Co-immunoprecipitation from mammalian cells and mouse gonad lysates; fluorescence co-localization of tagged proteins PloS one Low 18509452
2011 DND1 physically associates with mRNAs encoding pluripotency factors (OCT4, SOX2, NANOG, LIN28), cell cycle regulators (TP53, LATS2), and apoptotic factors (BCLX, BAX) in embryonic stem cells, as shown by ribonucleoprotein immunoprecipitation (RIP). RIP followed by RT-PCR in HA-tagged DND1-expressing human ES cells BMC molecular biology Low 21851623
2012 DND1 suppresses miR-26a-mediated inhibition of Ezh2 expression in mouse PGCs, maintaining H3K27me3 levels. Loss of DND1 reduces Ezh2 and H3K27me3, including at the Ccnd1 locus, promoting PGC reprogramming into teratoma-forming cells. Genetic mouse model (Dnd1 mutant), chromatin immunoprecipitation (H3K27me3), western blot for Ezh2, functional rescue experiments with Ezh2 expression or Ccnd1 deficiency Biology open Medium 29378702
2017 DND1 binds the 3' UTR of LATS2 mRNA and elevates LATS2 mRNA stability and protein expression, leading to YAP phosphorylation and cytoplasmic retention, thereby activating the Hippo pathway and suppressing EMT and cancer stem cell properties in hepatocellular carcinoma cells. RNA pull-down/binding assay for LATS2 3'UTR, western blot for YAP phosphorylation, loss-of-function knockdown with phenotypic readout Biotechnology letters Low 28593479
2017 DND1 stabilizes Bim mRNA by competing with miR-221 at the miR-221-binding site in the Bim 3' UTR, thereby preventing miR-221-mediated decay of Bim mRNA and promoting apoptosis. Mutation of the miR-221 binding site in Bim 3'UTR abolished the protective effect of DND1. DND1 knockdown in MCF-7 cells, Bim mRNA stability assays, 3'UTR mutagenesis, miR-221 functional interaction assays BioMed research international Medium 28191469
2018 CRISPR-mediated base-editing screening identified four missense mutations in DND1 that completely deplete PGCs in mice by disrupting DND1 protein stability and protein-protein interactions, defining specific amino acids critical for DND1 function in vivo. CRISPR/Cas9 base-editing in mice, in vivo PGC depletion phenotype, protein stability and co-immunoprecipitation assays Nature cell biology Medium 30275529
2019 DND1 controls downregulation of mRNAs associated with pluripotency, active cell cycle (including mTor, Hippo, and Bmp/Nodal signaling elements), and also directly targets and promotes expression of chromatin regulators required for male germ cell differentiation. DO-RIP-Seq identified DND1 direct target mRNAs in mouse male germ cells. DO-RIP-Seq (direct mRNA target identification), RNA-seq transcriptome analysis in Dnd1 Ter/Ter mutant male germ cells at E12.5–E14.5 Development (Cambridge, England) Medium 31253634
2021 Crystal structure of the human DND1-RRM2 domain (2.3 Å) revealed a non-canonical RRM fold maintained by a 3D domain-swapped dimer formed between β1 and β4 strands across protomers; NMR spectroscopy and MD simulations provided residue-level dynamics supporting the molecular basis of dimerization. X-ray crystallography (2.3 Å), NMR spectroscopy, molecular dynamics simulations Protein science : a publication of the Protein Society High 33860980
2022 NANOS2 interacts with RNA-bound DND1 and recruits the CNOT deadenylase complex to target mRNAs for repression. NANOS2 is required not only for CNOT recruitment but also for selecting the target mRNA together with DND1; a NANOS2-NIM–DND1 fusion that bypasses NANOS2's target selection function fails to repress targets, showing NANOS2 acts as a second-layer RBP for DND1 functional adaptation. Co-immunoprecipitation, somatic cell reporter system for exogenous NANOS2-DND1, domain-fusion constructs, mRNA repression assays Cell reports Medium 35705038
2023 DND1 is essential for the localization of nanos3 RNA to the periphery of zebrafish germ granules (phase-separated condensates), where ribosomes are present. In the absence of Dnd1, nanos3 RNA translocates from the granule periphery to the interior, away from ribosomes, correlating with loss of germ cell fate. 3D in vivo live imaging, loss-of-function (dnd1 morpholino/mutant zebrafish), fluorescent RNA localization assays in germ granules Developmental cell Medium 37463577
2023 DND1 RIP-sequencing in male germ cells during G0 cell cycle arrest identified binding targets including DNA methyltransferases (Dnmts), histone deacetylases (Hdacs), Tudor domain proteins (Tdrds), actin-dependent regulators (Smarcs), and ribosomal/Golgi proteins, indicating DND1 coordinates mRNA regulons of functionally related epigenetic enzymes and translational components. RIP-sequencing using antibodies against DND1-GFP knock-in fusion protein, RNA-seq time course in DND1-GFP-hi and DND1-GFP-lo male germ cell populations PLoS genetics Medium 36857387
2025 DND1 and NANOS3 form a ribonucleoprotein complex that specifically recognizes an AUGAAUU heptanucleotide motif (N3-DRE) in the 3' UTRs of target mRNAs. A 1.7-Å crystal structure of the ternary complex (DND1 + NANOS3 + CDK1-N3-DRE RNA) revealed a continuous RNA-binding surface enabling high-affinity, sequence-specific recognition. In vivo genome editing confirmed the N3-DRE is required for Cdk1 repression in mouse PGCs. DND1 alone has low intrinsic sequence specificity, but together with NANOS3 builds a high-information-content recognition motif. Tandem PAR-CLIP, 1.7-Å X-ray crystallography of ternary complex, CRISPR/Cas9 genome editing of N3-DRE in mice, loss-of-function transcriptomics bioRxivpreprint High 41040373
2025 DND1 forms a complex with NANOS3 to restrict human PGC (hPGC) specification. DND1 facilitates NANOS3 binding to hPGCLC-related mRNAs. The DND1-NANOS3 complex acts in processing bodies (P-bodies) to repress translation of SOX4 mRNA, with NANOS3 mediating interaction between DND1 and the translational repressor 4E-T. Co-immunoprecipitation, mRNA-binding analysis (RIP), P-body localization experiments, loss-of-function in human iPSC-derived PGCLCs, 4E-T interaction assays Nature communications Medium 40410171
2024 DND1 protein binds CLIC4 mRNA and promotes its degradation (negative correlation between DND1 and CLIC4 expression); silencing DND1 increases CLIC4 levels and suppresses proliferation, migration, invasion, and EMT in prostate cancer cells. Bioinformatic target prediction, western blot and qRT-PCR for CLIC4 expression, DND1 knockdown with functional rescue assays Histology and histopathology Low 38390782
2015 DND1 stabilizes p21(CIP1) mRNA in acute promyelocytic leukemia (APL/NB4) cells; knockdown of DND1 decreases p21(CIP1) mRNA expression and attenuates neutrophil differentiation, indicating DND1 is required for p21-mediated cell cycle arrest during granulocytic differentiation. Stable DND1 knockdown cell lines, qRT-PCR for p21 mRNA, differentiation assays in NB4 cells Leukemia research Low 26740055

Source papers

Stage 0 corpus · 45 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
2007 RNA-binding protein Dnd1 inhibits microRNA access to target mRNA. Cell 571 18155131
2017 DND1 maintains germline stem cells via recruitment of the CCR4-NOT complex to target mRNAs. Nature 112 28297718
2010 Regulation of male germ cell cycle arrest and differentiation by DND1 is modulated by genetic background. Development (Cambridge, England) 82 21115610
2010 MicroRNA-24 targeting RNA-binding protein DND1 in tongue squamous cell carcinoma. FEBS letters 75 20816961
2012 The Grainyhead transcription factor Grhl3/Get1 suppresses miR-21 expression and tumorigenesis in skin: modulation of the miR-21 target MSH2 by RNA-binding protein DND1. Oncogene 62 22614019
2009 BAX-mediated cell death affects early germ cell loss and incidence of testicular teratomas in Dnd1(Ter/Ter) mice. Developmental biology 62 19389346
2018 CRISPR-Cas9-mediated base-editing screening in mice identifies DND1 amino acids that are critical for primordial germ cell development. Nature cell biology 61 30275529
2008 Analysis of the DND1 gene in men with sporadic and familial testicular germ cell tumors. Genes, chromosomes & cancer 32 18069663
2023 Spatial organization and function of RNA molecules within phase-separated condensates in zebrafish are controlled by Dnd1. Developmental cell 30 37463577
2019 The RNA-binding protein DND1 acts sequentially as a negative regulator of pluripotency and a positive regulator of epigenetic modifiers required for germ cell reprogramming. Development (Cambridge, England) 29 31253634
2015 The RNA binding proteins RBM38 and DND1 are repressed in AML and have a novel function in APL differentiation. Leukemia research 29 26740055
2017 Silencing of DND1 in potato and tomato impedes conidial germination, attachment and hyphal growth of Botrytis cinerea. BMC plant biology 27 29212470
2011 Transcripts that associate with the RNA binding protein, DEAD-END (DND1), in embryonic stem (ES) cells. BMC molecular biology 27 21851623
2008 Mouse apolipoprotein B editing complex 3 (APOBEC3) is expressed in germ cells and interacts with dead-end (DND1). PloS one 25 18509452
2017 RNA-Binding Protein Dnd1 Promotes Breast Cancer Apoptosis by Stabilizing the Bim mRNA in a miR-221 Binding Site. BioMed research international 23 28191469
2012 The ter mutation in the rat Dnd1 gene initiates gonadal teratomas and infertility in both genders. PloS one 23 22655094
2019 Dnd1 Knockout in Sturgeons By CRISPR/Cas9 Generates Germ Cell Free Host for Surrogate Production. Animals : an open access journal from MDPI 22 30999629
2012 Expression of RNA-binding proteins DND1 and FXR1 in the porcine ovary, and during oocyte maturation and early embryo development. Molecular reproduction and development 21 22730312
2017 RNA-binding protein Dnd1 inhibits epithelial-mesenchymal transition and cancer stem cell-related traits on hepatocellular carcinoma cells. Biotechnology letters 20 28593479
2013 Contrasting effects of Deadend1 (Dnd1) gain and loss of function mutations on allelic inheritance, testicular cancer, and intestinal polyposis. BMC genetics 20 23773267
2018 Dnd1-mediated epigenetic control of teratoma formation in mouse. Biology open 13 29378702
2022 A cooperative mechanism of target RNA selection via germ-cell-specific RNA-binding proteins NANOS2 and DND1. Cell reports 10 35705038
2019 MicroRNA-24 regulates the growth and chemosensitivity of the human colorectal cancer cells by targeting RNA-binding protein DND1. Journal of B.U.ON. : official journal of the Balkan Union of Oncology 10 31646794
2011 Loss of Dnd1 facilitates the cultivation of genital ridge-derived rat embryonic germ cells. Experimental cell research 10 21570390
2021 The Role of DND1 in Cancers. Cancers 8 34359581
2020 MicroRNA-24 inhibits the proliferation, migration and invasion and enhances chemosensitivity of human gastric cancer by targeting DND1. Journal of B.U.ON. : official journal of the Balkan Union of Oncology 8 32521898
2024 Less is more: CRISPR/Cas9-based mutations in DND1 gene enhance tomato resistance to powdery mildew with low fitness costs. BMC plant biology 7 39123110
2024 Circular RNA circFCHO2(hsa_circ_0002490) promotes the proliferation of melanoma by directly binding to DND1. Cell biology and toxicology 6 38311675
2023 Linking human Dead end 1 (DND1) variants to male infertility employing zebrafish embryos. Human reproduction (Oxford, England) 6 36807972
2022 A homozygous missense variant in DND1 causes non-obstructive azoospermia in humans. Frontiers in genetics 6 36246621
2025 RNA-binding proteins DND1 and NANOS3 cooperatively suppress the entry of germ cell lineage. Nature communications 5 40410171
2023 Effects of CRISPR/Cas9-mediated dnd1 knockout impairs gonadal development in striped catfish. Animal : an international journal of animal bioscience 5 38103430
2021 Heading towards a dead end: The role of DND1 in germ line differentiation of human iPSCs. PloS one 5 34653201
2024 RNA-binding protein DND1 participates in migration, invasion, and EMT of prostate cancer cells by degrading CLIC4. Histology and histopathology 4 38390782
2023 Infertility control of transgenic fluorescent zebrafish with targeted mutagenesis of the dnd1 gene by CRISPR/Cas9 genome editing. Frontiers in genetics 4 36713075
2022 In silico analysis of DND1 and its co-expressed genes in human cancers. Biochemistry and biophysics reports 4 35059511
2021 Human DND1-RRM2 forms a non-canonical domain swapped dimer. Protein science : a publication of the Protein Society 4 33860980
2010 Screening for germline DND1 mutations in testicular cancer patients. Familial cancer 4 20411342
2023 The RNA binding protein DND1 is elevated in a subpopulation of pro-spermatogonia and targets chromatin modifiers and translational machinery during late gestation. PLoS genetics 3 36857387
2019 Generation of a novel mouse strain with conditional, cell-type specific, expression of DND1. Genesis (New York, N.Y. : 2000) 3 31513344
2025 Generation of primordial germ cell-like cells by two germ plasm components, dnd1 and nanos3, in medaka (Oryzias latipes). iScience 2 40060892
2025 The DND1-NANOS3 complex shapes the primordial germ cell transcriptome via a heptanucleotide sequence in mRNA 3' UTRs. bioRxiv : the preprint server for biology 2 41040373
2023 Spatial organization and function of RNA molecules within phase-separated condensates are controlled by Dnd1. bioRxiv : the preprint server for biology 2 37461638
2024 Transcriptome, hormonal, and secondary metabolite changes in leaves of DEFENSE NO DEATH 1 (DND1) silenced potato plants. Scientific reports 0 39232097
2019 Author Correction: CRISPR-Cas9-mediated base-editing screening in mice identifies DND1 amino acids that are critical for primordial germ cell development. Nature cell biology 0 30718859

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