Structure of the cyclomodulin Cif from pathogenic Escherichia coli.
Structure of the cyclomodulin Cif from pathogenic Escherichia coli.
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DOI:
10.1016/j.jmb.2008.09.051
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发表时间:
2008-12-12
影响因子:
5.6
通讯作者:
Stebbins, C. Erec
中科院分区:
文献类型:
--
作者:
Hsu, Yun;Jubelin, Gregory;Taieb, Frederic;Nougayrede, Jean-Philippe;Oswald, Eric;Stebbins, C. Erec
Bacterial pathogens have evolved a sophisticated arsenal of virulence factors to modulate host cell biology. Enteropathogenic and enterohemorrhagic Escherichia coli (EPEC and EHEC) use a type III protein secretion system (T3SS) to inject microbial proteins into host cells. The T3SS effector cycle inhibiting factor (Cif) produced by EPEC and EHEC is able to block host eukaryotic cell-cycle progression. We present here a crystal structure of Cif, revealing it to be a divergent member of the superfamily of enzymes including cysteine proteases and acetyltransferases that share a common catalytic triad. Mutation of these conserved active site residues abolishes the ability of Cif to block cell-cycle progression. Finally, we demonstrate that irreversible cysteine protease inhibitors do not abolish the Cif cytopathic effect, suggesting that another enzymatic activity may underlie the biological activity of this virulence factor.
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影响因子:
3.6
作者:
Marchès, O;Ledger, TN;Oswald, E
通讯作者:
Oswald, E
影响因子:
56.9
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Nougayrede, Jean-Philippe;Homburg, Stefan;Oswald, Eric
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3.2
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Oswald, E
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通讯作者:
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