Characterization of a novel plasmid-encoded HsdS subunit, S.LlaW12I, from Lactococcus lactis W12.
Plasmid, 2000/9;44(2):196-200.
Madsen A[1], Westphal C, Josephsen J
Affiliations
PMID: 10964630
Impact factor: 3.085
Abstract
A novel type I restriction-modification specificity subunit, S. LlaW12I, has been identified on the naturally occurring 8.0-kb plasmid pAW122 in the lactic acid bacterium Lactococcus lactis subsp. cremoris W12. Presence of the HsdS protein together with a complete type I restriction-modification system conferred increased phage restriction to the host, indicating exchange of specificity subunits. Sequence analysis showed that the S.LlaW12I subunit is most probably of type IC. Presumably, the hsdS gene is organized together with the repB gene on one transcriptional unit.
MeSH terms
Amino Acid Sequence; Bacterial Proteins; Bacteriophages; Consensus Sequence; DNA Methylation; DNA Restriction-Modification Enzymes; Lactococcus lactis; Molecular Sequence Data; Plasmids; Sequence Alignment; Sequence Homology, Amino Acid
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