Clostridium botulinum C2 toxin is a member of the family of binary actin-ADP-ribosylating toxins. It consists of the enzyme component C2I, and the separated bind,ng/translocation component C2II. Proteolytically activated,C2II forms heptamers and binds to a carbohydrate cell surface receptor. After attachment of C2I, the toxin complex is endocytosed to reach early endosomes. At low pH of endosomes, C2II-heptamers insert into the membrane, form pores and deliver C2I into the cytosol. Here, C2I ADP-ribosylates actin at Arg177 to block actin polymerization and to induce depolymerization of actin filaments. The mini-review describes main properties of C2 toxin and discusses new findings on the involvement of chaperones in the up-take process of the toxin.
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Univ Ulm, Inst Pharmacol & Toxicol, Med Ctr, Albert Einstein Allee 11, D-89081 Ulm, GermanyUniv Ulm, Inst Pharmacol & Toxicol, Med Ctr, Albert Einstein Allee 11, D-89081 Ulm, Germany
Kreidler, Anna-Maria
Benz, Roland
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Jacobs Univ Bremen, Dept Life Sci & Chem, Campusring 1, D-28759 Bremen, GermanyUniv Ulm, Inst Pharmacol & Toxicol, Med Ctr, Albert Einstein Allee 11, D-89081 Ulm, Germany
Benz, Roland
Barth, Holger
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Univ Ulm, Inst Pharmacol & Toxicol, Med Ctr, Albert Einstein Allee 11, D-89081 Ulm, GermanyUniv Ulm, Inst Pharmacol & Toxicol, Med Ctr, Albert Einstein Allee 11, D-89081 Ulm, Germany
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Univ Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, GermanyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Schnell, Leonie
Mittler, Ann-Katrin
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Univ Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, GermanyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Mittler, Ann-Katrin
Sadi, Mirko
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Univ Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, GermanyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Sadi, Mirko
Popoff, Michel R.
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Inst Pasteur, Dept Anaerob Bacteria, F-75015 Paris, FranceUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Popoff, Michel R.
Schwan, Carsten
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Univ Freiburg, Inst Expt & Clin Pharmacol & Toxicol, D-79104 Freiburg, GermanyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Schwan, Carsten
Aktories, Klaus
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Univ Freiburg, Inst Expt & Clin Pharmacol & Toxicol, D-79104 Freiburg, GermanyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Aktories, Klaus
Mattarei, Andrea
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Univ Padua, Dept Chem Sci, I-35121 Padua, ItalyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Mattarei, Andrea
Tehran, Domenico Azarnia
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Univ Padua, Dept Biomed Sci, I-35121 Padua, ItalyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Tehran, Domenico Azarnia
Montecucco, Cesare
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Univ Padua, Dept Biomed Sci, I-35121 Padua, ItalyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany
Montecucco, Cesare
Barth, Holger
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Univ Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, GermanyUniv Ulm, Med Ctr, Inst Pharmacol & Toxicol, Albert Einstein Allee 11, D-89081 Ulm, Germany