Integration of Hi-C with short and long-read genome sequencing reveals the structure of germline rearranged genomes.
Fiche publication
Date publication
octobre 2022
Journal
Nature communications
Auteurs
Membres identifiés du Cancéropôle Est :
Pr CALLIER Patrick, Pr FAIVRE Laurence, Mr DUFFOURD Yannis
Tous les auteurs :
Schöpflin R, Melo US, Moeinzadeh H, Heller D, Laupert V, Hertzberg J, Holtgrewe M, Alavi N, Klever MK, Jungnitsch J, Comak E, Türkmen S, Horn D, Duffourd Y, Faivre L, Callier P, Sanlaville D, Zuffardi O, Tenconi R, Kurtas NE, Giglio S, Prager B, Latos-Bielenska A, Vogel I, Bugge M, Tommerup N, Spielmann M, Vitobello A, Kalscheuer VM, Vingron M, Mundlos S
Lien Pubmed
Résumé
Structural variants are a common cause of disease and contribute to a large extent to inter-individual variability, but their detection and interpretation remain a challenge. Here, we investigate 11 individuals with complex genomic rearrangements including germline chromothripsis by combining short- and long-read genome sequencing (GS) with Hi-C. Large-scale genomic rearrangements are identified in Hi-C interaction maps, allowing for an independent assessment of breakpoint calls derived from the GS methods, resulting in >300 genomic junctions. Based on a comprehensive breakpoint detection and Hi-C, we achieve a reconstruction of whole rearranged chromosomes. Integrating information on the three-dimensional organization of chromatin, we observe that breakpoints occur more frequently than expected in lamina-associated domains (LADs) and that a majority reshuffle topologically associating domains (TADs). By applying phased RNA-seq, we observe an enrichment of genes showing allelic imbalanced expression (AIG) within 100 kb around the breakpoints. Interestingly, the AIGs hit by a breakpoint (19/22) display both up- and downregulation, thereby suggesting different mechanisms at play, such as gene disruption and rearrangements of regulatory information. However, the majority of interpretable genes located 200 kb around a breakpoint do not show significant expression changes. Thus, there is an overall robustness in the genome towards large-scale chromosome rearrangements.
Référence
Nat Commun. 2022 10 29;13(1):6470