A Starter Culture Rotation Strategy Incorporating Paired Restriction/ Modification and Abortive Infection Bacteriophage Defenses in a Single Lactococcus lactis Strain.

Applied and Environmental Microbiology
Evelyn Durmaz, T R Klaenhammer

Abstract

Three derivatives of Lactococcus lactis subsp. lactis NCK203, each with a different pair of restriction/ modification (R/M) and abortive infection (Abi) phage defense systems, were constructed and then rotated in repeated cycles of a milk starter culture activity test (SAT). The rotation proceeded successfully through nine successive SATs in the presence of phage and whey containing phage from previous cycles. Lactococcus cultures were challenged with 2 small isometric-headed phages, (phi)31 and ul36, in one rotation series and with a composite of 10 industrial phages in another series. Two native lactococcal R(sup+)/M(sup+) plasmids, pTRK68 and pTRK11, and one recombinant plasmid, pTRK308, harboring a third distinct R/M system were incorporated into three NCK203 derivatives constructed separately for the rotation. The R(sup+)/M(sup+) NCK203 derivatives were transformed with high-copy-number plasmids encoding four Abi genes, abiA, abiC, per31, and per50. Various Abi and R/M combinations constructed in NCK203 were evaluated for their effects on cell growth, level of phage resistance, and retardation of phage development during repeated cycles of the SAT. The three NCK203 derivatives chosen for use in the SAT exhibited additive e...Continue Reading

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Citations

Dec 1, 1995·Molecular Biotechnology·P K Dinsmore, T R Klaenhammer
May 23, 2006·Nature Reviews. Microbiology·Joseph M Sturino, Todd R Klaenhammer
Nov 30, 2007·Journal of Applied Microbiology·Jitka Holubová, Jytte Josephsen
Dec 19, 2012·Annual Review of Food Science and Technology·Julie E Samson, Sylvain Moineau
Aug 22, 2014·Applied Microbiology and Biotechnology·Min S Wang, Nitin Nitin
Jul 2, 1998·Applied and Environmental Microbiology·A Madsen, J Josephsen
Apr 2, 1999·Applied and Environmental Microbiology·A FordeG F Fitzgerald
Mar 26, 2019·Annual Review of Food Science and Technology·Todd Robert Klaenhammer
Sep 12, 2002·International Journal of Food Microbiology·Egon Bech Hansen
Nov 14, 1997·Journal of Bacteriology·G M DjordjevicT R Klaenhammer
Nov 15, 1997·Applied and Environmental Microbiology·G M Djordjevic, T R Klaenhammer

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