9.A.31.1.1
The putative peptide antibiotic-like killing factor (SdpC) exporter, SdpAB. However, Pérez Morales et al. 2013 concluded that SdpAB are not required for secretion, translation, or stability of SdpC, and that they may participate in a posttranslation step in the production of SDP. The mature form of the SDP toxin contains a disulfide bond. Their data indicate that while the disulfide bond does increase activity of SDP, it is not essential for SDP activity, and that the disulfide bond is formed independently of SdpAB. Thus, SDP production is a multistep process in which SdpAB are required for SDP production, likely by controlling, directly or indirectly, cleavage of SDP from the pro-SdpC precursor (Pérez Morales et al. 2013).