Cited by 33Bacterial Genetics and BiotechnologyProbiotics and Fermented FoodsBacteriophages and microbial interactions

A new mobile genetic element inLactobacillus delbrueckii subsp.bulgaricus

Germond, Jacques-Edouard, Lapierre, Luciane, Delley, Michèle, Molle, Beat·1995·Molecular and General Genetics MGG

Abstract

A new IS element (ISL3) was discovered in Lactobacillus delbrueckii subsp. bulgaricus during the characterization of the linkage relationships between the two genes important for milk fermentation, beta-galactosidase (lacZ) and the cell-wall associated protease (prtP). ISL3 is a 1494 bp element, flanked by 38 bp imperfect inverted repeats, and generates an 8 bp target duplication upon insertion. It contains one open reading frame, encoding a potential polypeptide of 434 amino acids, which shows significant homology (34% identity) to the transposase of the Leuconostoc mesenteroides element IS1165. Molecular analysis of spontaneous lacZ mutants revealed some strains that had sustained deletions of 7 to 30 kb in size, centered on and eliminating the copy of ISL3 next to lacZ. Other deletion endpoints were identified as located immediately adjacent to ISL3. Furthermore, genetic translocations that had occurred via transposition of ISL3 were observed fortuitously in cultures screened for deletion mutants. ISL3 can be found in one to several copies in various strains of L. delbrueckii. However, it was not present in other dairy lactic acid bacteria tested.

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Crossref · 10.1007/bf02191640

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Authors
Germond, J.-E., Lapierre, L., Delley, M., & Molle, B.
Affiliations
Nestec (Switzerland) (CH)
Venue
Molecular and General Genetics MGG
Published
1995-08
Volume
248
Issue
4
Pages
407-416
ISSN
  • 0026-8925 (ISSN-L)
  • 1432-1874
OpenAlex
W2022278575
Cited by
33
References
39
Citations by year
2024: 1 · 2021: 1 · 2018: 1
FWCI
1.67
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular and General Genetics MGG (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Physical Sciences › Environmental Science › Ecology › Bacteriophages and microbial interactions
Keywords
insertion sequences, mobile genetic elements, Lactobacillus bulgaricus, transposase, lacZ, PrtP, beta-galactosidase, gene deletion, dairy lactic acid bacteria
MeSH terms
Amino Acid Sequence, Base Sequence, DNA Transposable Elements, DNA, Bacterial, Genes, Bacterial, Lac Operon, Lactates, Lactobacillus, Molecular Sequence Data, Nucleotidyltransferases, Restriction Mapping, Sequence Deletion, Lactic Acid, Transposases

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