CentriVision: 植物におけるマルチスケール動原体解析のための統合プラットフォーム

Centromeres are crucial for chromosome segregation and genome stability, and with the advent of telomere-to-telomere (T2T) assemblies, they are increasingly becoming indispensable focal points of genome-wide studies. Thus, we developed CentriVision, a modular bioinformatics platform that unifies candidate centromere identification, structural similarity assessment, DNA repeat unit decomposition, and a framework for exploring potential relationships between single-nucleotide conservation and functional features. The platform provides a suite of analytical tools-including editing-distance dotplots, intra-segment heatmaps, kilobase-scale mini-dotplots, repeat monomer scanning with conserved site visualization, and satellite DNA expansion divergence estimation. These analyses can be further integrated with CENH3 ChIP-seq data. When applied to representative plants, CentriVision achieved high accuracy and uncovered diverse organizational patterns: Arabidopsis thaliana centromeres are composed primarily of 178-188 bp repeats interspersed with rarer ∼502 bp variants that exhibit pronounced sequence conservation yet only background CENH3-ChIP signal, suggesting they may represent pre-centromeric sequences overlooked in earlier studies; Oryza sativa contains two dominant classes rather previously reported one class of centromeric repeats; By contrast, Zea mays exhibited a pattern of strongly biased expansion toward evolving a single dominant repeat unit, showing a distinct evolutionary strategy of centromere reconstruction. Papaver setigerum displays a notably three-layered nested repeat structure. Integration of repeat sequence divergence and CENH3 binding further revealed species-specific evolutionary trajectories. Together, these findings advance our understanding of centromere structure and function. CentriVision offers a reproducible, scalable and user-friendly framework that quantitatively connects repeat evolution, structural variation, and functional epigenomics, to help provide new insights into the architecture and diversification of plant centromeres.