Abstract:
:Genome replication is highly regulated in time and space, but the rules governing the remodeling of these programs during evolution remain largely unknown. We generated genome-wide replication timing profiles for ten Lachancea yeasts, covering a continuous evolutionary range from closely related to more divergent species. We show that replication programs primarily evolve through a highly dynamic evolutionary renewal of the cohort of active replication origins. We found that gained origins appear with low activity yet become more efficient and fire earlier as they evolutionarily age. By contrast, origins that are lost comprise the complete range of firing strength. Additionally, they preferentially occur in close vicinity to strong origins. Interestingly, despite high evolutionary turnover, active replication origins remain regularly spaced along chromosomes in all species, suggesting that origin distribution is optimized to limit large inter-origin intervals. We propose a model on the evolutionary birth, death, and conservation of active replication origins.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Agier N,Delmas S,Zhang Q,Fleiss A,Jaszczyszyn Y,van Dijk E,Thermes C,Weigt M,Cosentino-Lagomarsino M,Fischer Gdoi
10.1038/s41467-018-04628-4subject
Has Abstractpub_date
2018-06-06 00:00:00pages
2199issue
1issn
2041-1723pii
10.1038/s41467-018-04628-4journal_volume
9pub_type
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