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Salvetti E, Campedelli I, Larini I, Conedera G, Torriani S. Exploring Antibiotic Resistance Diversity in Leuconostoc spp. by a Genome-Based Approach: Focus on the lsaA Gene. Microorganisms 2021; 9:microorganisms9030491. [PMID: 33652718 PMCID: PMC7996808 DOI: 10.3390/microorganisms9030491] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 02/19/2021] [Accepted: 02/22/2021] [Indexed: 01/29/2023] Open
Abstract
Leuconostoc spp. are environmental microorganisms commonly associated with fermented foods. Absence of antibiotic resistance (AR) in bacteria is a critical issue for global food safety. Herein, we updated the occurrence of AR genes in the Leuconostoc genus through in silico analyses of the genomes of 17 type strains. A total of 131 putative AR traits associated with the main clinically relevant antibiotics were detected. We found, for the first time, the lsaA gene in L. fallax ATCC 700006T and L. pseudomesenteroides NCDO 768T. Their amino acid sequences displayed high similarities (59.07% and 52.21%) with LsaA of Enterococcusfaecalis V583, involved in clindamycin (CLI) and quinupristin-dalfopristin (QUD) resistance. This trait has different distribution patterns in Leuconostoc nontype strains-i.e., L. pseudomesenteroides, L. lactis and L. falkenbergense isolates from fermented vegetables, cheeses, and starters. To better explore the role of lsaA, MIC for CLI and QUD were assessed in ATCC 700006T and NCDO 768T; both strains were resistant towards CLI, potentially linking lsaA to their resistant phenotype. Contrarily, NCDO 768T was sensitive towards QUD; however, expression of lsaA increased in presence of this antibiotic, indicating an active involvement of this trait and thus suggesting a revision of the QUD thresholds for this species.
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Affiliation(s)
- Elisa Salvetti
- Department of Biotechnology, University of Verona, 37134 Verona, Italy; (E.S.); (I.L.); (G.C.)
| | | | - Ilaria Larini
- Department of Biotechnology, University of Verona, 37134 Verona, Italy; (E.S.); (I.L.); (G.C.)
| | - Giada Conedera
- Department of Biotechnology, University of Verona, 37134 Verona, Italy; (E.S.); (I.L.); (G.C.)
| | - Sandra Torriani
- Department of Biotechnology, University of Verona, 37134 Verona, Italy; (E.S.); (I.L.); (G.C.)
- Correspondence:
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Aquilanti L, Carbini A, Strappati R, Santarelli S, Silvestri G, Garofalo C, Clementi F. Characterisation of Lactobacillus helveticus strains producing antihypertensive peptides by RAPD and inverse-PCR of IS elements. Benef Microbes 2010; 1:229-42. [DOI: 10.3920/bm2010.0015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Lactobacillus helveticus is used for the manufacture of cheeses and milk-based products. Although it is not considered a probiotic microorganism, some strains demonstrated beneficial effects through the production of antihypertensive peptides from the hydrolysis of casein during milk fermentation. Strain-specificity of bioactive peptide production by L. helveticus makes the availability of reliable typing methods essential for both legal and good manufacturing processes. Accordingly, RAPD and inverse-PCR of five insertion sequence elements were comparatively evaluated for the molecular characterisation of four L. helveticus dairy cultures producing antihypertensive peptides and fourteen reference strains. Calculation of discriminatory indices and cluster analysis of the DNA fingerprints confirmed the suitability of both approaches for acceptable strain differentiation. Although RAPD was more discriminating, for a few test strains a neat discrimination was only achieved through multiplex inverse-PCR, thus suggesting the suitability of a combined analytical approach for a finer strain discrimination.
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Affiliation(s)
- L. Aquilanti
- Sezione di Microbiologia Alimentare, Ambientale ed Industriale, Dipartimento di Scienze Alimentari, Agro-Ingegneristiche, Fisiche, Economico-Agrarie e del Territorio (SAIFET), Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - A. Carbini
- Sezione di Microbiologia Alimentare, Ambientale ed Industriale, Dipartimento di Scienze Alimentari, Agro-Ingegneristiche, Fisiche, Economico-Agrarie e del Territorio (SAIFET), Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - R. Strappati
- Sezione di Microbiologia Alimentare, Ambientale ed Industriale, Dipartimento di Scienze Alimentari, Agro-Ingegneristiche, Fisiche, Economico-Agrarie e del Territorio (SAIFET), Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - S. Santarelli
- Sezione di Microbiologia Alimentare, Ambientale ed Industriale, Dipartimento di Scienze Alimentari, Agro-Ingegneristiche, Fisiche, Economico-Agrarie e del Territorio (SAIFET), Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - G. Silvestri
- Sezione di Microbiologia Alimentare, Ambientale ed Industriale, Dipartimento di Scienze Alimentari, Agro-Ingegneristiche, Fisiche, Economico-Agrarie e del Territorio (SAIFET), Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - C. Garofalo
- Sezione di Microbiologia Alimentare, Ambientale ed Industriale, Dipartimento di Scienze Alimentari, Agro-Ingegneristiche, Fisiche, Economico-Agrarie e del Territorio (SAIFET), Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - F. Clementi
- Sezione di Microbiologia Alimentare, Ambientale ed Industriale, Dipartimento di Scienze Alimentari, Agro-Ingegneristiche, Fisiche, Economico-Agrarie e del Territorio (SAIFET), Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
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Riipinen KA, Räisänen L, Alatossava T. Integration of the group c phage JCL1032 of Lactobacillus delbrueckii subsp. lactis and complex phage resistance of the host. J Appl Microbiol 2007; 103:2465-75. [DOI: 10.1111/j.1365-2672.2007.03479.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Ricci G, Fortina MG. Characterization of Lactobacillus helveticus strains isolated from cheeses by distribution studies of insertion sequences. Int J Food Microbiol 2006; 112:112-9. [PMID: 16859795 DOI: 10.1016/j.ijfoodmicro.2006.05.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2005] [Revised: 02/08/2006] [Accepted: 05/27/2006] [Indexed: 11/22/2022]
Abstract
A collection of 38 Lactobacillus helveticus strains, isolated from a number of different artisan Italian cheeses, and 4 reference strains were studied with respect to the presence of insertion sequences and their distribution and abundance. The mobile genetic element ISLh1, that contains one open reading frame coding for a putative transposase of the IS982 family, was used for DNA fingerprinting, together with IS1201 and ISL2, previously isolated from L. helveticus. The number of insertion sequences per strain and the size of DNA restriction fragments containing them, was variable and allowed the discrimination at the strain-level. The genomic distribution of the three unrelated insertion sequences showed significant correlations and allowed the differentiation of the strains also with regard to the specific ecological niche of origin of the isolates. Consequently, insertion sequences comparison may be useful in determining the history of a group of strains known to be related because of identity and offers a further parameter for evaluating the population polymorphism in L. helveticus.
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Affiliation(s)
- Giovanni Ricci
- Department of Food Science and Microbiology - Industrial Microbiology Section, University of Milano, via Celoria 2, 20133 Milan, Italy
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Ravin V, Sasaki T, Räisänen L, Riipinen KA, Alatossava T. Effective plasmid pX3 transduction in Lactobacillus delbrueckii by bacteriophage LL-H. Plasmid 2006; 55:184-93. [PMID: 16458963 DOI: 10.1016/j.plasmid.2005.12.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2005] [Revised: 12/16/2005] [Accepted: 12/16/2005] [Indexed: 11/30/2022]
Abstract
High-frequency plasmid transductions in Lactobacillus delbrueckii subsp. lactis and subsp. bulgaricus strains mediated by pac-type bacteriophages were observed and further investigated. The frequency of plasmid transduction by phages LL-H and LL-S attained levels of from 0.10 to about 1 with plasmid p X 3, but only about 2 x 10(-2) with plasmid pJK650. Infection of L. delbrueckii subsp. lactis strain LKT(pX3) or ATCC 15808(pX3) with phage LL-H resulted in intensive concatemerization of plasmid pX3, and most progeny phage particles contained concatemers of plasmid DNA instead of phage LL-H DNA. The synthesis of phage LL-H DNA was depressed. No evident homology or recombination was observed between phage LL-H DNA and plasmid pX3. The unusually high frequency of plasmid pX3 transduction by phage LL-H could be considered to result from specific interaction(s) between a particular phage and plasmid. These interactions may include pX3-mediated blockage of phage LL-H DNA replication and effective use of a particular pac-like site located about 1 kb from BglII in the smaller NdeI-BglII fragment of plasmid pX3. Phage LL-H together with plasmid vector pX3 could be used as effective plasmid transduction tools for genetic engineering of L. delbrueckii subsp. lactis and subsp. bulgaricus strains.
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Affiliation(s)
- Victor Ravin
- Department of Biology, University of Oulu, Linnanmaa campus, P.O. Box 3000, FIN-90014 Oulu, Finland
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