Affinage

ZCWPW1

Zinc finger CW-type PWWP domain protein 1 · UniProt Q9H0M4

Length
648 aa
Mass
72.0 kDa
Annotated
2026-06-11
9 papers in source corpus 9 papers cited in narrative 9 extracted findings
Cross-family judge vs UniProt: Affinage preferred faithfulness: 7/7 claims corpus-supported (100%)

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

ZCWPW1 is a meiosis-specific dual histone methylation reader that couples PRDM9-directed chromatin marking to the repair of programmed double-strand breaks during male prophase I (PMID:31453335, PMID:32352380). Through its CW and PWWP domains it recognizes both H3K4me3 and H3K36me3, and in human cells it is preferentially recruited to PRDM9 binding sites with higher affinity than to sites bearing H3K4me3 alone, with chromatin occupancy strongly promoted by PRDM9 methyltransferase activity (PMID:32374261, PMID:32744506). Reader-dead knock-in mice phenocopy the null, establishing that H3K4me3 recognition is essential for its function (PMID:32374261). At recombination hotspots ZCWPW1 maintains H3K9 acetylation by antagonizing HDAC-mediated deacetylation and promotes chromatin accessibility, preparing hotspots for homologous recombination; ectopic expression in somatic cells enhances HR-mediated DSB repair (PMID:36068616). Independently of PRDM9, ZCWPW1 is enriched at subtelomeric regions where it stabilizes TRF1, LINC complex components, dynein, and the meiotic cohesin STAG3, coupling telomeres to motors to enable rapid prophase chromosome movements required for synapsis (PMID:41676639). Loss of ZCWPW1 in male mice causes failure of synapsis, persistent unrepaired DSBs, absent crossovers, and meiotic arrest leading to infertility, while females remain fertile (PMID:31453335, PMID:32744506); a homozygous human missense variant abolishing ZCWPW1 expression elevates DNA damage and reduces H3K9ac, extending this role to human meiosis (PMID:38310235). Its presence across vertebrates is tightly coincident with PRDM9, indicating co-evolution as a functional partner (PMID:35217607).

Mechanistic history

Synthesis pass · year-by-year structured walk · 8 steps
  1. 2019 High

    Established that ZCWPW1 is a histone reader specifically required for male meiotic prophase I, defining its core biological role before any mechanism was known.

    Evidence Zcwpw1 knockout mouse with cytological analysis of meiotic progression

    PMID:31453335

    Open questions at the time
    • Molecular basis of male-specific requirement not resolved
    • Direct chromatin targets not yet mapped
    • How reading activity links to DSB repair undefined
  2. 2020 High

    Showed that ZCWPW1's H3K4me3 reading activity is itself essential and that its chromatin occupancy depends on PRDM9 methyltransferase activity, linking the reader directly to PRDM9-marked hotspots.

    Evidence Reader-dead knock-in mice, ChIP-seq, and IF across multiple genetic backgrounds

    PMID:32374261

    Open questions at the time
    • Whether ZCWPW1 physically contacts PRDM9 not established
    • Downstream effectors of recruitment unknown
  3. 2020 High

    Defined ZCWPW1 as a dual reader of H3K4me3 and H3K36me3 preferentially targeted to PRDM9 sites, and demonstrated that DSBs form normally but are not repaired in its absence, placing ZCWPW1 downstream of break formation.

    Evidence Human-cell recruitment assays, domain characterization, ChIP-seq, and KO mouse phenotyping (two parallel studies)

    PMID:32352380 PMID:32744506

    Open questions at the time
    • Functional role of CpG recognition unclear
    • Mechanism converting recruitment to repair not defined
  4. 2022 Medium

    Provided a chromatin-state mechanism by showing ZCWPW1 maintains H3K9ac and accessibility at hotspots by antagonizing HDACs, and that this activity can promote HR even in somatic cells.

    Evidence ChIP-seq for H3K9ac, ATAC-seq, HDAC antagonism assays, and somatic-cell HR assay in Zcwpw1 mutants

    PMID:36068616

    Open questions at the time
    • Identity of antagonized HDACs not specified
    • Single-lab evidence
    • Direct biochemical mechanism of HDAC antagonism not shown
  5. 2022 Medium

    Demonstrated genome-wide co-evolution of ZCWPW1 with PRDM9 across vertebrates, supporting an obligate functional partnership.

    Evidence Comparative phylogenetic coevolution analysis across 446 vertebrate species

    PMID:35217607

    Open questions at the time
    • Correlative evidence without biochemical reconstitution of a PRDM9-ZCWPW1 interaction
  6. 2024 Medium

    Extended the DSB-repair and H3K9ac-maintenance role to humans by showing a loss-of-expression variant impairs repair in patient-derived assays.

    Evidence Whole-exome sequencing plus in vitro expression of WT vs mutant ZCWPW1 with γ-H2AX, comet, and H3K9ac readouts

    PMID:38310235

    Open questions at the time
    • Single patient/variant
    • Somatic-cell assays rather than human meiosis
    • Causality at organismal level inferred indirectly
  7. 2023 Low

    Positioned ZCWPW1 downstream of miR-5622-3p in a spermatocyte DNA-damage response under nanoparticle stress.

    Evidence miR-5622-3p inhibitor treatment in vivo and in vitro with western blot and IF for repair factors

    PMID:37315217

    Open questions at the time
    • No direct luciferase or pull-down confirmation of miR-ZCWPW1 targeting
    • Indirect inhibitor-based evidence
    • Single lab
  8. 2026 Medium

    Revealed a PRDM9-independent function in organizing subtelomeric architecture and telomere-motor coupling required for prophase chromosome movement and synapsis.

    Evidence Super-resolution imaging, co-localization, and genetic epistasis with Prdm9-/- in Zcwpw1-/- spermatocytes (preprint)

    PMID:41676639

    Open questions at the time
    • Preprint, not peer-reviewed
    • Direct physical interaction with TRF1/LINC/STAG3 not biochemically demonstrated
    • How a single protein performs both hotspot and subtelomeric roles unresolved

Open questions

Synthesis pass · forward-looking unresolved questions
  • Whether ZCWPW1 physically interacts with PRDM9 and with the subtelomeric TRF1/LINC/dynein/STAG3 machinery, and how its dual reading and architectural functions are mechanistically coordinated, remains unresolved.
  • No direct biochemical reconstitution of a ZCWPW1-PRDM9 complex
  • No structural model of dual-domain engagement on nucleosomes
  • Mechanism integrating hotspot chromatin remodeling with telomere coupling unknown

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0042393 histone binding 4 GO:0003677 DNA binding 1
Localization
GO:0000228 nuclear chromosome 3 GO:0005634 nucleus 2
Pathway
R-HSA-73894 DNA Repair 3 R-HSA-1474165 Reproduction 2 R-HSA-1640170 Cell Cycle 2
Partners
PRDM9STAG3TRF1

Evidence

Reading pass · 9 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
2019 ZCWPW1 functions as an H3K4me3 reader specifically required for meiosis prophase I progression in male (but not female) mice; loss of Zcwpw1 in males causes complete failure of synapsis, meiotic arrest at zygotene-to-pachytene stage, incomplete DNA double-strand break repair, and lack of crossover formation, leading to male infertility, while female mice retain normal fertility. Knockout mouse model with immunofluorescence and cytological analysis of meiotic progression Science advances High 31453335
2020 ZCWPW1 acts as an H3K4me3 reader whose chromatin occupancy is strongly promoted by the histone-modification activity of PRDM9; H3K4me3 reader-dead Zcwpw1 knock-in mice phenocopy full knockouts (spermatocyte arrest at pachytene-like stage), establishing that ZCWPW1's H3K4me3 reading activity is essential for DSB repair and synapsis. H3K4me3 reader-dead knock-in mice, ChIP-seq, immunofluorescence in multiple mutant backgrounds eLife High 32374261
2020 ZCWPW1 contains both H3K4me3 (PWWP/CW) and H3K36me3 recognition domains; in human cells it is strongly and specifically recruited to PRDM9 binding sites with higher affinity than sites possessing H3K4me3 alone; ZCWPW1 also unexpectedly recognises CpG dinucleotides. Male Zcwpw1 knockout mice show normal DSB positioning but persistent DMC1 foci, severe DSB repair and synapsis defects. Chromatin recruitment assays in human cells, ChIP-seq, Zcwpw1 knockout mice with cytological analysis eLife High 32744506
2020 ZCWPW1 is a dual histone methylation reader (recognizing both H3K4me3 and H3K36me3) that is tightly co-expressed with Prdm9 during spermatogenesis; it is required for efficient repair of PRDM9-dependent DSBs and pairing of homologous chromosomes in male mice. Identification of dual-reader domain architecture, co-expression analysis, knockout mouse with DSB repair and chromosome pairing phenotyping eLife High 32352380
2022 ZCWPW1 maintains H3K9 acetylation at recombination hotspots by antagonizing HDAC-mediated deacetylation, and promotes chromatin accessibility at hotspots, thereby preparing the chromatin for homologous recombination during meiotic DSB repair. Ectopic expression of ZCWPW1 in human somatic cells enhances DSB repair via homologous recombination. ChIP-seq for H3K9ac in Zcwpw1 mutants, HDAC antagonism assays, ATAC-seq for chromatin accessibility, ectopic expression in somatic cells with HR assay Genome biology Medium 36068616
2022 Phylogenetic analysis across 446 vertebrate species shows ZCWPW1 presence/absence is unexpectedly coincident with that of PRDM9, demonstrating ZCWPW1 has co-evolved with PRDM9 throughout vertebrates, consistent with ZCWPW1 being a key functional interactor of PRDM9 in DSB repair. Comparative genomics / phylogenetic coevolution analysis across 446 vertebrate species Proceedings of the National Academy of Sciences of the United States of America Medium 35217607
2024 A homozygous missense variant in human ZCWPW1 (c.1064C>T, p.P355L) causes loss of ZCWPW1 protein expression; cells expressing mutant ZCWPW1 show elevated γ-H2AX, increased DNA tail (comet assay), and reduced H3K9ac levels after DSB induction compared to wild-type ZCWPW1-expressing cells, confirming ZCWPW1's role in DSB repair and H3K9ac maintenance in humans. Whole-exome sequencing, Sanger sequencing, in vitro expression of mutant ZCWPW1 in HEK293T cells, γ-H2AX immunofluorescence, Neutral Comet Assay, Sperm Chromatin Dispersion assay Reproductive health Medium 38310235
2023 miR-5622-3p targets ZCWPW1 to suppress its expression; inhibition of miR-5622-3p increases ZCWPW1 levels, relieves DNA damage (reduced γ-H2AX, RAD51, DMC1 foci), and suppresses apoptosis in spermatogenic cells exposed to silica nanoparticles, placing ZCWPW1 downstream of miR-5622-3p in a DNA damage response pathway in spermatocytes. miR-5622-3p inhibitor treatment in vivo (mice) and in vitro (spermatocyte cells), western blot, immunofluorescence for γ-H2AX and repair factors Nanotoxicology Low 37315217
2026 ZCWPW1 is strongly enriched at subtelomeric regions of mouse spermatocytes (independent of PRDM9 activity) where it stabilizes TRF1, LINC complex components, dynein, and meiosis-specific cohesin STAG3. Loss of ZCWPW1 disrupts telomere architecture, weakens telomere-LINC-motor coupling, and abolishes rapid prophase chromosome movements, leading to defective synapsis and persistent DSBs through a mechanism distinct from and more severe than that observed in Prdm9-/- spermatocytes. Super-resolution imaging, co-localization analysis, genetic epistasis with Prdm9-/- mice, immunofluorescence for telomere/LINC/motor complex components in Zcwpw1-/- spermatocytes bioRxivpreprint Medium 41676639

Source papers

Stage 0 corpus · 9 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
2019 The histone modification reader ZCWPW1 is required for meiosis prophase I in male but not in female mice. Science advances 48 31453335
2020 The histone modification reader ZCWPW1 links histone methylation to PRDM9-induced double-strand break repair. eLife 43 32374261
2020 ZCWPW1 is recruited to recombination hotspots by PRDM9 and is essential for meiotic double strand break repair. eLife 38 32744506
2022 PRDM9 losses in vertebrates are coupled to those of paralogs ZCWPW1 and ZCWPW2. Proceedings of the National Academy of Sciences of the United States of America 33 35217607
2020 Dual histone methyl reader ZCWPW1 facilitates repair of meiotic double strand breaks in male mice. eLife 32 32352380
2022 The histone modification reader ZCWPW1 promotes double-strand break repair by regulating cross-talk of histone modifications and chromatin accessibility at meiotic hotspots. Genome biology 19 36068616
2024 A loss-of-function variant in ZCWPW1 causes human male infertility with sperm head defect and high DNA fragmentation. Reproductive health 6 38310235
2023 MiR-5622-3p inhibits ZCWPW1 to induce apoptosis in silica-exposed mice and spermatocyte cells. Nanotoxicology 3 37315217
2026 ZCWPW1 organizes telomeric architecture to drive meiotic chromosome movements. bioRxiv : the preprint server for biology 0 41676639

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