RT Journal Article SR Electronic(1) A1 Biet, Franck A1 Berjeaud, Jean Marc A1 Worobo, Randy W. A1 Cenatiempo, Yves A1 Fremaux, ChristopheYR 1998 T1 Heterologous expression of the bacteriocin mesentericin Y105 using the dedicated transport system and the general secretion pathway JF Microbiology, VO 144 IS 10 SP 2845 OP 2854 DO https://doi.org/10.1099/00221287-144-10-2845 PB Microbiology Society, SN 1465-2080, AB SUMMARY: Two different N-terminal extensions have been identified within class II bacteriocin precursors. The first one is a two-glycine-type leader peptide associated with a dedicated ATP-binding cassette transporter. The second is a signal peptide which directs the bacteriocin precursor to the general secretion machinery. Mesentericin Y105 is a class II anti-Listeria bacteriocin produced by Leuconostoc mesentemides Y105 via a dedicated transport system (DTS). To investigate heterologous expression systems capable of producing mesentericin Y105 in various hosts, two different secretion vectors were constructed. One of them, containing the mesentericin Y105 structural gene fused to the segment encoding the divergicin A signal peptide, was introduced into Escherichia coli, Leuconostoc subsp. and Lactococcus subsp. In E. coli, mesentericin Y105 production was linked to a putative periplasmic toxicity. To take advantage of this secretion system, the mesentericin Y105 precursor was also produced in E. coli. It was demonstrated that this pre-bacteriocin exhibited some antagonistic activity against Listeria. To allow for comparison between the two different transport systems, mesentericin Y105 production using the vector containing the mesentericin Y105 structural genem and i t s DTS transporter operon was examined. The production of mesentericin Y105 was monitored by a new fast purification method followed by MS analysis. It was shown that, in Leuconostoc, the production of mesentericin Y105 is enhanced via the DTS compared to the general secretion pathway., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-144-10-2845