Clustering of strong replicators associated with active promoters is sufficient to establish an early-replicating domain
Résumé
Vertebrate genomes replicate according to a precise temporal program strongly correlated with their organization into A/B compartments. Until now, the molecular mechanisms underlying the establishment of early-replicating domains remain largely unknown. We defined two minimal cis-element modules containing a strong replication origin and chromatin modifier binding sites capable of shifting a targeted mid-late-replicating region for earlier replication. The two origins overlap with a constitutive or a silent tissue-specific promoter. When inserted side-by-side, these modules advance replication timing over a 250 kb region through the cooperation with one endogenous origin located 30 kb away. Moreover, when inserted at two chromosomal sites separated by 30 kb, these two modules come into close physical proximity and form an early-replicating domain establishing more contacts with active A compartments. The synergy depends on the presence of the active promoter/origin. Our results show that clustering of strong origins located at active promoters can establish earlyreplicating domains.
Mots clés
chromatin accessibility
nuclear organization
promoter
replication origin
replication timing Subject Categories Chromatin
Transcription & Genomics
DNA Replication
Recombination & Repair
chromatin accessibility
Replication timing
Replication origin
Nuclear organization
Chromatin accessibility
Promoter
Domaines
Bio-informatique [q-bio.QM] Apprentissage [cs.LG] Méthodologie [stat.ME] Machine Learning [stat.ML] Modélisation et simulation Logiciel mathématique [cs.MS] Statistiques [math.ST] Génomique, Transcriptomique et Protéomique [q-bio.GN] Réseaux moléculaires [q-bio.MN] Bio-Informatique, Biologie Systémique [q-bio.QM] Applications [stat.AP]
Origine : Fichiers produits par l'(les) auteur(s)