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Behind the chlamydial cloak: the replication cycle of chlamydiaphage Chp2, revealed

Salim, Omar, Skilton, Rachel J., Lambden, Paul R., Fane, Bentley A. and Clarke, Ian N. (2008) Behind the chlamydial cloak: the replication cycle of chlamydiaphage Chp2, revealed Journal of Virology, 377, (2), pp. 440-445. (doi:10.1016/j.virol.2008.05.001).

Record type: Article


Studying the replication of the chlamydiaphages presents significant challenges. Their host bacteria, chlamydiae, have a unique obligate intracellular developmental cycle. Using qPCR, immunochemistry, and electron microscopy, the life cycle of chlamydiaphage Chp2 was characterised. Chp2 infection has a dramatic inhibitory effect on bacterial cell division. The RB to EB transition is arrested and RBs enlarge without further division. There is a phase of rapid Chp2 genome replication 36 to 48 h post infection that is coincident with the expression of viral proteins and the replication of the host chromosome. The end stage of Chp2 replication is characterised by the appearance of paracrystalline structures followed by bacterial cell lysis. These data indicate that the Chp2 life cycle is closely coordinated with the developmental cycle of its bacterial host. This is a remarkable adaptation by a microvirus to infect and replicate in a bacterial host that has an obligate intracellular developmental cycle.

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Published date: August 2008
Keywords: chlamydiaphage, Chp2, chlamydia, developmental cycle, life cycle


Local EPrints ID: 59406
ISSN: 0022-538X
PURE UUID: 18fd5bb1-2b18-41c4-812b-fdf859a81dda
ORCID for Omar Salim: ORCID iD
ORCID for Ian N. Clarke: ORCID iD

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Date deposited: 04 Sep 2008
Last modified: 17 Jul 2017 14:24

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Author: Omar Salim ORCID iD
Author: Rachel J. Skilton
Author: Paul R. Lambden
Author: Bentley A. Fane
Author: Ian N. Clarke ORCID iD

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