Abstract:
:Many plant pathogens subvert host immunity by injecting compositionally diverse but functionally similar repertoires of cytoplasmic effector proteins. The bacterial pathogen Pseudomonas syringae is a model for exploring the functional structure of such repertoires. The pangenome of P. syringae encodes 57 families of effectors injected by the type III secretion system. Distribution of effector genes among phylogenetically diverse strains reveals a small set of core effectors targeting antimicrobial vesicle trafficking and a much larger set of variable effectors targeting kinase-based recognition processes. Complete disassembly of the 28-effector repertoire of a model strain and reassembly of a minimal functional repertoire reveals the importance of simultaneously attacking both processes. These observations, coupled with growing knowledge of effector targets in plants, support a model for coevolving molecular dialogs between effector repertoires and plant immune systems that emphasizes mutually-driven expansion of the components governing recognition.
journal_name
Trends Microbioljournal_title
Trends in microbiologyauthors
Lindeberg M,Cunnac S,Collmer Adoi
10.1016/j.tim.2012.01.003subject
Has Abstractpub_date
2012-04-01 00:00:00pages
199-208issue
4eissn
0966-842Xissn
1878-4380pii
S0966-842X(12)00004-2journal_volume
20pub_type
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