Journal
TRENDS IN MICROBIOLOGY
Volume 30, Issue 6, Pages 524-533Publisher
CELL PRESS
DOI: 10.1016/j.tim.2021.10.007
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Recent studies have shown that T3SS effectors interact with each other in the host, revealing their interdependency and context-dependent essentiality, which is of great significance for understanding the pathogenesis of the pathogens.
Type Ill secretion system (T3SS) effectors are key virulence factors that underpin the infection strategy of many clinically important Gram-negative pathogens, including Salmonella enterica, Shigella spp., enteropathogenic and enterohemorrhagic Escherichia coli and their murine equivalent, Citrobacter rodentium. The cellular processes or proteins targeted by the effectors can be common to multiple pathogens or pathogen-specific. The main approach to understanding T3SS-mediated pathogenesis has been to determine the contribution of one effector at a time, with the aim of piecing together individual functions and unveiling infection mechanisms. However, in contrast to this prevailing approach, simultaneous deletion of multiple effectors revealed that they function as an interconnected network in vivo, uncovering effector codependency and context-dependent effector essentiality. This paradigm shift in T3SS biology is at the heart of this opinion article.
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