Article
The serine 31 residue of the B subunit of Shiga toxin 2 is essential for secretion in enterohemorrhagic Escherichia coli.
Infection and immunity - 1 May 2007
Shimizu Takeshi, Kawakami Satomi, Sato Toshio, Sasaki Terumi, Higashide Masato, Hamabata Takashi, Ohta Toshiko, Noda Masatoshi
Abstract excerpt
Shiga toxins produced by enterohemorrhagic Escherichia coli (EHEC) include Shiga toxin 1 (Stx1) as well as Shiga toxin 2 (Stx2). Stx1 is cell associated, whereas Stx2 is localized to the culture supernatant. We have analyzed the secretion of Stx2 by generating histidine-tagged StxB (StxB-H). Although neither StxB1-H nor StxB2-H was secreted in StxB-H-overexpressed EHEC, StxB2-H-overexpressed EHEC showed inhibited...
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