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Research: H3K27 and H3K9 methylation mask potential CTCF binding sites to maintain 3D genome integrity
- Kei Fukuda,
- Chikako Shimura,
- and Yoichi Shinkai
Genome Res. October 2025 35: 2199-2210; Published in Advance August 5, 2025, doi:10.1101/gr.280732.125
...at the eight-cell stage (Fig. 4C,D). Consistent with low CTCF binding throughout early development in “Increased” Class 5, Class 5 does not show insulation function at the eight-cell stage (Supplemental Fig. S4C). When examining the H3K27me3 profile at the eight-cell stage, Class 5 exhibits particularly high...
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Research: Wnt signaling activation induces CTCF binding and loop formation at cis-regulatory elements of target genes
- Anna Nordin,
- Chaitali Chakraborty,
- Mattias Jonasson,
- Orgena Dano,
- Gianluca Zambanini,
- Pierfrancesco Pagella,
- Silvia Remeseiro,
- and Claudio Cantù
Genome Res. August 2025 35: 1701-1716; Published in Advance June 23, 2025, doi:10.1101/gr.279684.124
...with bbmap bbduk (version 38.18) (Bushnell et al. 2017) to remove adapter sequences, known artifacts, [AT]18, [TA]18, and poly(G) and poly(C) repeats. Alignment to the hg38 was performed using Bowtie (version 1.0.0) (Langmead et al. 2009) with the options -v 3 -m 1 -X 120 for CTCF and RAD21 and with -X 350...
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Research: Transposable elements contribute to the evolution of host shift–related genes in cactophilic Drosophila species
- Daniel Siqueira de Oliveira,
- Anaïs Larue,
- William Vilas Boas Nunes,
- Francois Sabot,
- Alejandra Bodelón,
- María Pilar García Guerreiro,
- Cristina Vieira,
- and Claudia Marcia Aparecida Carareto
Genome Res. March 2026 36: 487-505; Published in Advance February 10, 2026, doi:10.1101/gr.280463.125
....The radiation of cactophilic Drosophila species across different hosts is an evolutionary outcome that gave rise to specific adaptations (Rane et al. 2019). They can be summarized into three steps: localization, acceptance, and host usage (Markow 2019). In the localization step, odorant-binding proteins (OBPs...
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Research: Polycomb misregulation in enterocytes drives tissue decline in the aging Drosophila intestine
- Sarah M. Leichter,
- Kami Ahmad,
- and Steven Henikoff
Genome Res. January 2026 36: 102-114; Published in Advance November 17, 2025, doi:10.1101/gr.281058.125
...27me3 signal (Supplemental Fig. S4E). At the same time, architectural proteins such as CTCF and Motif 1 Binding Protein (M1BP) are enriched in enhancers that gain H3K27me3 signal with age (Supplemental Fig. S4F). Notably, CLAMP motifs appear consistently across cell types, enriched in enhancers...
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Research: Cell-type- and chromosome-specific chromatin landscapes and DNA replication programs of Drosophila testis tumor stem cell–like cells
- Jennifer A. Urban,
- Daniel Ringwalt,
- John M. Urban,
- Wingel Xue,
- Ryan Gleason,
- Keji Zhao,
- and Xin Chen
Genome Res. January 2026 36: 83-101; Published in Advance December 10, 2025, doi:10.1101/gr.280809.125
...enrichment despite lacking well-positioned nucleosomes (Fig. 3E). This noncanonical H3K27me3 enrichment resembles the pattern observed in female Drosophila GSCs, in which H3K27me3 is detectable at both inactive and active gene loci (DeLuca et al. 2020).In contrast, in CySC-like cells, H3K27me3 is most...
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Research: Genomic context sensitivity of insulator function
- André M. Ribeiro-dos-Santos,
- Megan S. Hogan,
- Raven D. Luther,
- Ran Brosh,
- and Matthew T. Maurano
Genome Res. March 2022 32: 425-436; Published in Advance January 26, 2022, doi:10.1101/gr.276449.121
...is influenced by the binding of insulator proteins such as CTCF, which can act as potent enhancer blockers when interposed between an enhancer and a promoter in a reporter assay. But not all CTCF sites -wide function as insulator elements, depending on cellular and genomic context. To dissect the influence...
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Research: Genetic variation in recalcitrant repetitive regions of the Drosophila melanogaster genome
- Harsh G. Shukla,
- Mahul Chakraborty,
- and J.J. Emerson
Genome Res. September 2025 35: 2023-2040; Published in Advance July 16, 2025, doi:10.1101/gr.280728.125
..., and A3The histone locus in Drosophila melanogaster is present at the 39DE region of Chromosome 2L, bordering the pericentromeric heterochromatin. The highly homogeneous nature of this locus has impeded its resolution to the base pair level. The current reference iso-1 Rel6 has only ∼69 kb (12 units...
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Research: Genome-wide profiles of H3K9me3, H3K27me3 modifications, and DNA methylation during diapause of Asian corn borer (Ostrinia furnacalis)
- Pengfei Lv,
- Xingzhuo Yang,
- Xianguo Zhao,
- Zhangwu Zhao,
- and Juan Du
Genome Res. May 2024 34: 725-739; Published in Advance June 12, 2024, doi:10.1101/gr.278661.123
...on SU(VAR)3-9 and E(Z) activities in Drosophila melanogaster, respectively (Greiner et al. 2005; Bhat et al. 2021). Through protein sequence comparison, we found that SUV39H2-like and E(Z) in the Asian corn borer share 35.92% and 62.17% homology with SU(VAR)3-9 and E(Z) in D. melanogaster, respectively...
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Research: Active enhancers strengthen insulation by RNA-mediated CTCF binding at chromatin domain boundaries
- Zubairul Islam,
- Bharath Saravanan,
- Kaivalya Walavalkar,
- Umer Farooq,
- Anurag Kumar Singh,
- Sabarinathan Radhakrishnan,
- Jitendra Thakur,
- Awadhesh Pandit,
- Steven Henikoff,
- and Dimple Notani
Genome Res. January 2023 33: 1-17; Published in Advance January 17, 2023, doi:10.1101/gr.276643.122
.... Using CTCF site deletions and boundary-associated RNA knockdowns, we observe that boundary-associated RNAs facilitate recruitment and clustering of CTCF at TAD borders. The resulting CTCF enrichment enhances TAD insulation, enhancer–promoter interactions, and TAD gene expression. Importantly, knockdown...
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Research: Strong bias in long-read sequencing prevents assembly of Drosophila melanogaster Y-linked genes
- A. Bernardo Carvalho,
- Bernard Y. Kim,
- and Fabiana Uno
Genome Res. January 2026 36: 71-82; Published in Advance October 1, 2025, doi:10.1101/gr.280604.125
.... The data shown in Figure 3 allow us to start looking at the sequence level at these mysterious regions of the Drosophila Y Chromosome in which protein-coding exons are embedded in huge blocks of intronic satellite DNA (Kurek et al. 2000; Reugels et al. 2000) and yet are properly transcribed and spliced...

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