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In the present work a culture process to produce bacterial cellulose (BC) using by-products of the cider production from the Basque Country was investigated. The apple pomace was mixed with sugar cane (AR/SC medium) and the mixture was found to be a potential carbon source for Gluconacetobacter medellinensis strain ID13488 since higher cellulose production was observed with respect to the commercial...
Differential stability of toxins and antitoxins is the key for the conditional activation and function of Toxin–Antitoxin systems. Here we report the evaluation of the action of cell proteases Lon, ClpAP, ClpXP and ClpYQ on the Kis antitoxin and the Kid toxin of the parD TA system of plasmid R1. In vitro analysis shows that Kis antitoxin, but not the Kid toxin, is cleaved specifically by the ClpAP...
Promiscuous, rolling-circle replication plasmid pMV158 determines tetracycline resistance to its host and can be mobilized by conjugation. Plasmid pLS1 is a deletion derivative of pMV158 that has lost its conjugative mobilization ability. Both plasmids replicate efficiently and are stably inherited in Streptococcus pneumoniae. We have analyzed the effect of pMV158 and pLS1 carriage on the bacterial...
The coupling between the replication and parD (kis, kid) maintenance modules of R1 has been revisited here by the isolation of a significant collection of conditional replication mutants in the pKN1562 mini-R1 plasmid, and in its derivative, pJLV01, specifically affected in the RNase activity of the Kid toxin. This new analysis aims to identify key factors in this coupling. For this purpose we have...
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