Replication-biased genome organisation in the crenarchaeon Sulfolobus.

Abstract:

BACKGROUND:Species of the crenarchaeon Sulfolobus harbour three replication origins in their single circular chromosome that are synchronously initiated during replication. RESULTS:We demonstrate that global gene expression in two Sulfolobus species is highly biased, such that early replicating genome regions are more highly expressed at all three origins. The bias by far exceeds what would be anticipated by gene dosage effects alone. In addition, early replicating regions are denser in archaeal core genes (enriched in essential functions), display lower intergenic distances, and are devoid of mobile genetic elements. CONCLUSION:The strong replication-biased structuring of the Sulfolobus chromosome implies that the multiple replication origins serve purposes other than simply shortening the time required for replication. The higher-level chromosomal organisation could be of importance for minimizing the impact of DNA damage, and may also be linked to transcriptional regulation.

journal_name

BMC Genomics

journal_title

BMC genomics

authors

Andersson AF,Pelve EA,Lindeberg S,Lundgren M,Nilsson P,Bernander R

doi

10.1186/1471-2164-11-454

subject

Has Abstract

pub_date

2010-07-28 00:00:00

pages

454

issn

1471-2164

pii

1471-2164-11-454

journal_volume

11

pub_type

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