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2017 ; 8
(ä): 893
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Network Analysis Reveals a Common Host-Pathogen Interaction Pattern in
Arabidopsis Immune Responses
#MMPMID28611808
Li H
; Zhou Y
; Zhang Z
Front Plant Sci
2017[]; 8
(ä): 893
PMID28611808
show ga
Many plant pathogens secrete virulence effectors into host cells to target
important proteins in host cellular network. However, the dynamic interactions
between effectors and host cellular network have not been fully understood. Here,
an integrative network analysis was conducted by combining Arabidopsis thaliana
protein-protein interaction network, known targets of Pseudomonas syringae and
Hyaloperonospora arabidopsidis effectors, and gene expression profiles in the
immune response. In particular, we focused on the characteristic network topology
of the effector targets and differentially expressed genes (DEGs). We found that
effectors tended to manipulate key network positions with higher betweenness
centrality. The effector targets, especially those that are common targets of an
individual effector, tended to be clustered together in the network. Moreover,
the distances between the effector targets and DEGs increased over time during
infection. In line with this observation, pathogen-susceptible mutants tended to
have more DEGs surrounding the effector targets compared with resistant mutants.
Our results suggest a common plant-pathogen interaction pattern at the cellular
network level, where pathogens employ potent local impact mode to interfere with
key positions in the host network, and plant organizes an in-depth defense by
sequentially activating genes distal to the effector targets.