Affinage

ZCWPW1

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

Length
648 aa
Mass
72.0 kDa
Annotated
2026-04-28
9 papers in source corpus 9 papers cited in narrative 9 extracted findings

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

ZCWPW1 is a meiosis-specific dual histone methyl reader that couples PRDM9-directed chromatin marking to DNA double-strand break (DSB) repair and homolog synapsis during spermatogenesis. Its CW domain reads H3K4me3 and a second domain recognizes H3K36me3, together conferring high-affinity recruitment to PRDM9-marked recombination hotspots; H3K4me3 reading activity is essential, as reader-dead mutant mice phenocopy full knockouts with meiotic arrest at zygotene-to-pachytene, persistent DMC1 foci, absence of crossovers, and male infertility (PMID:31453335, PMID:32374261, PMID:32352380, PMID:32744506). At hotspots, ZCWPW1 maintains H3K9 acetylation by antagonizing HDACs, thereby preserving chromatin accessibility required for homologous recombination (PMID:36068616). A homozygous missense variant (p.P355L) that reduces ZCWPW1 protein levels and impairs DSB repair causes human male infertility with elevated sperm DNA fragmentation (PMID:38310235).

Mechanistic history

Synthesis pass · year-by-year structured walk · 6 steps
  1. 2019 High

    The first question answered was whether ZCWPW1 is functionally required during meiosis: knockout mice revealed that ZCWPW1 is indispensable for synapsis and DSB repair in male meiosis, establishing it as a sex-dimorphic meiotic factor.

    Evidence Zcwpw1 knockout mouse with immunofluorescence and meiotic staging

    PMID:31453335

    Open questions at the time
    • Molecular mechanism by which ZCWPW1 promotes DSB repair was unknown
    • Domain requirements for meiotic function were uncharacterized
    • Relationship to PRDM9 was inferred but not tested genetically
  2. 2020 High

    Three concurrent studies established that ZCWPW1 functions as a dual reader of H3K4me3 and H3K36me3, that its chromatin occupancy depends on PRDM9-deposited marks, and that the H3K4me3-reading CW domain is essential in vivo—resolving the molecular logic linking PRDM9 modification to downstream DSB processing.

    Evidence ChIP-seq in wild-type/mutant backgrounds, reader-dead knock-in mice, dual-domain biochemistry, co-expression analysis, human cell ChIP-seq

    PMID:32352380 PMID:32374261 PMID:32744506

    Open questions at the time
    • Mechanism by which ZCWPW1 binding promotes DSB repair (chromatin remodeling, protein recruitment) was unexplained
    • No structural model of ZCWPW1 bound to dual-marked nucleosomes
    • Whether ZCWPW1 has functions independent of PRDM9 was unclear
  3. 2022 Medium

    The chromatin-level mechanism was elucidated: ZCWPW1 maintains H3K9 acetylation at hotspots by antagonizing HDACs, thereby keeping chromatin accessible for homologous recombination—filling the gap between histone mark reading and DSB repair.

    Evidence ChIP-seq for H3K9ac, ATAC-seq, HDAC interaction assays in Zcwpw1 mutant mice and ectopic expression in human somatic cells

    PMID:36068616

    Open questions at the time
    • Specific HDAC(s) antagonized by ZCWPW1 not identified
    • Whether ZCWPW1 acts catalytically or as a steric blocker of HDACs is unknown
    • Findings from a single lab await independent replication
  4. 2022 Medium

    Phylogenetic coevolution analysis across 446 vertebrate species showed tight co-occurrence of ZCWPW1 and PRDM9, cementing ZCWPW1 as a core component of the PRDM9 pathway beyond mammals.

    Evidence Comparative genomics of PRDM9 and ZCWPW1 presence/absence across vertebrates

    PMID:35217607

    Open questions at the time
    • No functional data in non-mammalian species
    • Whether ZCWPW1 recognizes PRDM9-marked chromatin identically in non-mammals is untested
  5. 2024 Medium

    The first human disease-causing ZCWPW1 variant was identified: homozygous p.P355L reduces protein expression and DSB repair capacity, linking ZCWPW1 loss-of-function to human male infertility.

    Evidence Whole-exome sequencing of infertile patient, functional validation of mutant in HEK293T cells with γ-H2AX, comet assay, sperm chromatin dispersion

    PMID:38310235

    Open questions at the time
    • Single family reported; prevalence of ZCWPW1 variants in male infertility unknown
    • No testis biopsy to confirm meiotic arrest stage in the patient
    • Mechanism by which P355L reduces protein stability not resolved
  6. 2026 Medium

    A PRDM9-independent role was uncovered: ZCWPW1 localizes to subtelomeric regions where it stabilizes the telomere-LINC complex–dynein axis, and its loss abolishes rapid prophase chromosome movements—providing a second, telomere-based mechanism for the synapsis defect.

    Evidence (preprint) Super-resolution imaging and immunofluorescence for TRF1, LINC complex, dynein, and STAG3 in Zcwpw1 KO and Prdm9 KO spermatocytes, genetic epistasis

    PMID:41676639

    Open questions at the time
    • Preprint not yet peer-reviewed
    • Whether ZCWPW1 directly binds LINC complex components or acts via chromatin remodeling is unresolved
    • Relative contributions of hotspot-repair versus telomere-movement functions to synapsis failure not dissected

Open questions

Synthesis pass · forward-looking unresolved questions
  • Key open questions include the structural basis for dual-mark recognition, the identity of specific HDAC targets antagonized by ZCWPW1, the molecular determinants of sex-dimorphic essentiality, and whether the PRDM9-independent telomere function is conserved across species.
  • No crystal or cryo-EM structure of ZCWPW1 with nucleosomal substrates
  • Basis for female dispensability despite expression in oocytes is unknown
  • Interplay between hotspot-repair and telomere-movement roles has not been genetically separated

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0042393 histone binding 4 GO:0098772 molecular function regulator activity 1
Localization
GO:0005634 nucleus 3 GO:0005694 chromosome 3
Pathway
R-HSA-73894 DNA Repair 6 R-HSA-1474165 Reproduction 2 R-HSA-4839726 Chromatin organization 1
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 mice; loss of Zcwpw1 causes complete failure of synapsis, meiotic arrest at zygotene-to-pachytene stage, incomplete DSB repair, and lack of crossover formation, leading to male infertility, while female fertility is largely unaffected. Knockout mouse model with immunofluorescence and meiotic staging 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 mutant mice phenocopy Zcwpw1 knockout, demonstrating that the H3K4me3 reading activity is essential for DSB repair and synapsis. ChIP-seq in multiple mutant backgrounds, H3K4me3 reader-dead knock-in mouse, immunofluorescence eLife High 32374261
2020 ZCWPW1 contains both H3K4me3 (CW domain) and H3K36me3 recognition domains and is specifically and strongly recruited to PRDM9 binding sites in human cells with higher affinity than sites bearing H3K4me3 alone; ZCWPW1 also recognises CpG dinucleotides. Male Zcwpw1 knockout mice show normal DSB positioning but persistent DMC1 foci, severe DSB repair and synapsis defects. ChIP-seq in human cells, domain biochemistry, Zcwpw1 knockout mouse model eLife High 32744506
2020 ZCWPW1 is a dual histone methylation reader recognizing both H3K4me3 and H3K36me3 deposited by PRDM9; it is tightly co-expressed with Prdm9 during spermatogenesis and is required for efficient repair of PRDM9-dependent DSBs and for pairing of homologous chromosomes in male mice. Identification of dual-reader domains, co-expression analysis, KO mouse with DSB repair and pairing assays eLife High 32352380
2022 ZCWPW1 promotes DSB repair by antagonizing HDAC-mediated deacetylation to maintain H3K9ac at recombination hotspots, thereby promoting chromatin accessibility required for homologous recombination; ectopic expression of ZCWPW1 in human somatic cells enhances DSB repair via homologous recombination. ChIP-seq for H3K9ac in Zcwpw1 mutants, HDAC interaction assays, ATAC-seq for chromatin accessibility, ectopic expression in human somatic cells Genome biology Medium 36068616
2022 ZCWPW1 coevolved with PRDM9 across vertebrates, and its presence/absence correlates with that of PRDM9, establishing that ZCWPW1 is a key interactor within the PRDM9 pathway across vertebrates beyond mammals. 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 ZCWPW1 (p.P355L) reduces ZCWPW1 protein expression and impairs DSB repair capacity (elevated γ-H2AX, increased tail DNA, reduced H3K9ac) in HEK293T cells, causing human male infertility with sperm head defects and high DNA fragmentation. Whole-exome sequencing, in vitro mutant plasmid expression in HEK293T, γ-H2AX immunofluorescence, comet assay, sperm chromatin dispersion assay Reproductive health Medium 38310235
2023 miR-5622-3p targets ZCWPW1 mRNA to suppress ZCWPW1 expression in spermatocytes; inhibition of miR-5622-3p restores ZCWPW1 levels and alleviates silica nanoparticle-induced DNA damage and spermatogenic cell apoptosis. miRNA inhibitor in vitro and in vivo, western blot, γ-H2AX staining Nanotoxicology Low 37315217
2026 ZCWPW1 localizes strongly to subtelomeric regions of mouse spermatocytes 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, acting independently of PRDM9. Super-resolution imaging, immunofluorescence for telomere/LINC/motor proteins in Zcwpw1 KO and Prdm9 KO mice, genetic epistasis 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 42 32374261
2020 ZCWPW1 is recruited to recombination hotspots by PRDM9 and is essential for meiotic double strand break repair. eLife 37 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 30 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 18 36068616
2024 A loss-of-function variant in ZCWPW1 causes human male infertility with sperm head defect and high DNA fragmentation. Reproductive health 5 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