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Phage abortive infection mechanism from Lactococcus lactis subsp. lactis, expression of which is mediated by an
P J Cluzel1, A Chopin, S D Ehrlich
1Laboratoire de Génétique Microbienne, Institut de Biotechnologie, I.N.R.A., Jouy-en-Josas, France.
Applied and Environmental Microbiology
|December 1, 1991
Abstract:
A 5-kb DNA fragment conferring a phage abortive infection phenotype (Abi+) has been cloned from Lactococcus lactis subsp. lactis IL416. The Abi+ determinant was subcloned on a 2-kb fragment which carried an Iso-ISS1 element and an open reading frame of 753 bp designated ORFX. Deletion within ORFX entailed the loss of the Abi+ phenotype, establishing that ORFX is the structural abi-416 gene. The expression of abi-416 was shown to be mediated by the Iso-ISS1 element, which contains a sequence fitting the consensus sequence for gram-positive promoters.