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. Author manuscript; available in PMC: 2014 Dec 12.
Published in final edited form as: Mol Cell. 2013 Dec 12;52(5):611–612. doi: 10.1016/j.molcel.2013.11.018

Figure 1. The SocAB system is a new class of toxin-antitoxin modules.

Figure 1

(A) Unlike canonical toxin-antitoxin systems, the SocA antitoxin (purple) acts as a proteolytic adaptor for the degradation of SocB toxin (red) by the protease ClpXP (grey).

(B) The five types of toxin-antitoxin systems are classified based on the mechanism of action the antitoxin (purple) employs to inactivate toxin (red) activity.

AT, antitoxin; T, toxin.