Salmonella pathogenesis and processing of secreted effectors by caspase-3.
Salmonella pathogenesis and processing of secreted effectors by caspase-3.
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DOI:
10.1126/science.1194598
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发表时间:
2010-10-15
期刊:
影响因子:
--
通讯作者:
McCormick BA
中科院分区:
文献类型:
--
作者:
Srikanth CV;Wall DM;Maldonado-Contreras A;Shi H;Zhou D;Demma Z;Mumy KL;McCormick BA
The enteric pathogen, Salmonella enterica serovar Typhimurium, causes food poisoning resulting in gastroenteritis. The S. Typhimurium effector protein, SipA, promotes gastroenteritis by functional motifs that either trigger mechanisms of inflammation or bacterial entry. During infection of intestinal epithelial cells, SipA was found to be responsible for the early activation of caspase-3, an enzyme that is required for SipA cleavage at a specific recognition motif that divided the protein into its two functional domains, and activated SipA in a manner necessary for pathogenicity. Other caspase-3 cleavage sites identified in S. Typhimurium appeared to be restricted to secreted effector proteins, indicating this may be a general strategy employed by this pathogen for processing of its secreted effectors.
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