Noumeavirus replication relies on a transient remote control of the host nucleus.

Abstract:

:Acanthamoeba are infected by a remarkable diversity of large dsDNA viruses, the infectious cycles of which have been characterized using genomics, transcriptomics and electron microscopy. Given their gene content and the persistence of the host nucleus throughout their infectious cycle, the Marseilleviridae were initially assumed to fully replicate in the cytoplasm. Unexpectedly, we find that their virions do not incorporate the virus-encoded transcription machinery, making their replication nucleus-dependent. However, instead of delivering their DNA to the nucleus, the Marseilleviridae initiate their replication by transiently recruiting the nuclear transcription machinery to their cytoplasmic viral factory. The nucleus recovers its integrity after becoming leaky at an early stage. This work highlights the importance of virion proteomic analyses to complement genome sequencing in the elucidation of the replication scheme and evolution of large dsDNA viruses.

journal_name

Nat Commun

journal_title

Nature communications

authors

Fabre E,Jeudy S,Santini S,Legendre M,Trauchessec M,Couté Y,Claverie JM,Abergel C

doi

10.1038/ncomms15087

subject

Has Abstract

pub_date

2017-04-21 00:00:00

pages

15087

issn

2041-1723

pii

ncomms15087

journal_volume

8

pub_type

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