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The type VI secretion system (T6SS) is molecular machine used by a wide range of Gram-negative bacterial species to transport effectors from the interior (cytoplasm or cytosol) of a bacterial cell across the cellular envelope into an adjacent target cell. While often reported that the T6SS was discovered in 2006 by researchers studying the causative agent of cholera, Vibrio cholerae, the first study demonstrating that T6SS genes encode a protein export apparatus was actually published in 2004, in a study of protein secretion by the fish pathogen Edwardsiella tarda.

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  • The type VI secretion system (T6SS) is molecular machine used by a wide range of Gram-negative bacterial species to transport effectors from the interior (cytoplasm or cytosol) of a bacterial cell across the cellular envelope into an adjacent target cell. While often reported that the T6SS was discovered in 2006 by researchers studying the causative agent of cholera, Vibrio cholerae, the first study demonstrating that T6SS genes encode a protein export apparatus was actually published in 2004, in a study of protein secretion by the fish pathogen Edwardsiella tarda. Since then, it is estimated that at least a quarter of all pathogenic and non-pathogenic proteobacterial genomes encode for a T6SS, including pathogens of animals, plants, and humans, as well as soil, environmental or marine bacteria. Genes encoding for the T6SSs are commonly found chromosomally, but can also be harboured in mobile genetic elements and on plasmids mediating their transfer and increase in genetic diversity. While most of the early studies of Type VI secretion focused on its role in the pathogenesis of higher organisms, it is now known to function primarily in interbacterial antagonism. (en)
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  • The type VI secretion system (T6SS) is molecular machine used by a wide range of Gram-negative bacterial species to transport effectors from the interior (cytoplasm or cytosol) of a bacterial cell across the cellular envelope into an adjacent target cell. While often reported that the T6SS was discovered in 2006 by researchers studying the causative agent of cholera, Vibrio cholerae, the first study demonstrating that T6SS genes encode a protein export apparatus was actually published in 2004, in a study of protein secretion by the fish pathogen Edwardsiella tarda. (en)
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  • Type VI secretion system (en)
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