Chlamydia causes fragmentation of the Golgi compartment to ensure reproduction - PubMed (original) (raw)
. 2009 Feb 5;457(7230):731-5.
doi: 10.1038/nature07578. Epub 2008 Dec 7.
Affiliations
- PMID: 19060882
- DOI: 10.1038/nature07578
Chlamydia causes fragmentation of the Golgi compartment to ensure reproduction
Dagmar Heuer et al. Nature. 2009.
Abstract
The obligate intracellular bacterium Chlamydia trachomatis survives and replicates within a membrane-bound vacuole, termed the inclusion, which intercepts host exocytic pathways to obtain nutrients. Like many other intracellular pathogens, C. trachomatis has a marked requirement for host cell lipids, such as sphingolipids and cholesterol, produced in the endoplasmic reticulum and the Golgi apparatus. However, the mechanisms by which intracellular pathogens acquire host cell lipids are not well understood. In particular, no host cell protein responsible for transporting Golgi-derived lipids to the chlamydial inclusions has yet been identified. Here we show that Chlamydia infection in human epithelial cells induces Golgi fragmentation to generate Golgi ministacks surrounding the bacterial inclusion. Ministack formation is triggered by the proteolytic cleavage of the Golgi matrix protein golgin-84. Inhibition of golgin-84 truncation prevents Golgi fragmentation, causing a block in lipid acquisition and maturation of C. trachomatis. Golgi fragmentation by means of RNA-interference-mediated knockdown of distinct Golgi matrix proteins before infection enhances bacterial maturation. Our data functionally connect bacteria-induced golgin-84 cleavage, Golgi ministack formation, lipid acquisition and intracellular pathogen growth. We show that C. trachomatis subverts the structure and function of an entire host cell organelle for its own advantage.
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