Open AccessCryptic plasmids from Lactobacillus helveticus and their evolutionary relationship
Author(s) -
Pridmore David,
Stefanova Tzona,
Mollet Beat
Publication year - 1994
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1994.tb07300.x
Subject(s) - plasmid , lactobacillus helveticus , biology , replicon , genetics , gene , homology (biology) , dna , lactobacillus , bacteria
Three different cryptic plasmids from Lactobacillus helveticus have been identified and their DNA sequences determined. Analyses and comparisons of their primary structures revealed stretches of DNA with considerable homology. Thus, large portions of the plasmid non‐coding sequences were conserved at 80–90% identity between the different plasmids identified so far in L. helveticus . Nevertheless, different plasmids found in a same host strain utilise different genes of replication, probably acquired during evolution from different replicons from Gram‐positive bacterial origins. A remnant structure of such a possible genetic integration of a foreign replication gene into one of the plasmids of L. helveticus was identified.