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© Research
Publication : Current topics in microbiology and immunology

Type VII Secretion Systems in Gram-Positive Bacteria

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Current topics in microbiology and immunology - 07 Jan 2016

Bottai D, Gröschel MI, Brosch R

Link to Pubmed [PMID] – 26847354

Curr. Top. Microbiol. Immunol. 2016 Jan;

Bacterial secretion systems are sophisticated molecular machines that fulfil a wide range of important functions, which reach from export/secretion of essential proteins or virulence factors to the implication in conjugation processes. In contrast to the widely distributed Sec and Twin Arginine Translocation (TAT) systems, the recently identified ESX/type VII systems show a more restricted distribution and are typical for mycobacteria and other high-GC Actinobacteria. Similarly, type VII-like secretion systems have been described in low-GC Gram-positive bacteria belonging to the phylum Firmicutes. While the most complex organization of type VII secretion systems currently known is found in slow-growing mycobacteria, which harbour up to 5 chromosomal-encoded systems (ESX-1 to ESX-5), much simpler organization is reported for type VII-like systems in Firmicutes. In this chapter, we describe common and divergent features of type VII- and type VII-like secretion pathways and also comment on their biological key roles, many of which are related to species-/genus-specific host-pathogen interactions and/or virulence mechanisms.

http://www.ncbi.nlm.nih.gov/pubmed/26847354