1
|
Nitipan S, Saithong P. Characterization and sequencing analysis of pLP2.5-11 and pLP3.0-4 novel cryptic plasmids from Lactiplantibacillus plantarum WP72/27. 3 Biotech 2023; 13:263. [PMID: 37408733 PMCID: PMC10317920 DOI: 10.1007/s13205-023-03684-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 06/25/2023] [Indexed: 07/07/2023] Open
Abstract
We sequenced and described two cryptic plasmids from Lactiplantibacillus plantarum strain WP72/27, termed pLP2.5-11 (OP831909) and pLP3.0-4 (OP831910). Nucleotide sequencing gave the sizes of pLP2.5-11 and pLP3.0-4 as 2754 and 3197 base pairs, with G + C contents 38.89% and 40.88% and predicted two and eight putative open reading frames, respectively. The RepA protein of pLP2.5-11 shared a 99% identity with pC30il, pLP1 and pC30il, whereas the RepB protein of pLP3.0-4 shared a 98% identity with pXY3, a member of the rolling-circle replication (RCR) pC194 family. The origin of plasmid replication was predicted to consist of inverted and directed repeat sequences upstream of the Rep genes. Sequence analysis predicted that both pLP2.5-11 and pLP3.0-4 plasmids replicate via a rolling-circle process. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-023-03684-y.
Collapse
Affiliation(s)
- Supachai Nitipan
- Department of Biology, Faculty of Science, Thaksin University, Phattalung Campus, Phattalung, 93210 Thailand
- Microbial Technology for Agriculture, Food and Environment Research Center, Thaksin University, Phatthalung Campus, Phatthalung, 93210 Thailand
| | - Pramuan Saithong
- Department of Applied Microbiology, Institute of Food Research and Product Development, Kasetsart University, Bangkok, 10900 Thailand
| |
Collapse
|
2
|
Characterization of Four Novel Plasmids from Lactobacillus plantarum BM4. Jundishapur J Microbiol 2017. [DOI: 10.5812/jjm.12894] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
3
|
Sequence analysis of five endogenous plasmids isolated from Lactobacillus pentosus F03. Plasmid 2016; 84-85:1-10. [PMID: 26854068 DOI: 10.1016/j.plasmid.2016.02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 02/03/2016] [Accepted: 02/03/2016] [Indexed: 11/23/2022]
Abstract
Lactobacillus pentosus F03, a strain isolated from pig intestines in Taiwan, contains multiple endogenous plasmids. We isolated, completely sequenced, and characterized five of the plasmids present in L. pentosus F03 designated as pF03-1 (3282bp), pF03-2 (3293bp), pF03-3 (1787bp), pF03-4 (2138bp), and pF03-5 (1949bp). The replication types of these plasmids were predicted by comparing the features of the replicon nucleotides and the similarity of replication proteins with those of the plasmids of known replication types. The results of basic local alignment search tool analyses indicate that these plasmids, except for pF03-4, belong to different replicating plasmid families. According to replicon and initiator protein analyses, pF03-1, pF03-2, and pF03-3, were determined to belong respectively to the pMV158, pC194/pUB110, and pT181 families of rolling-circle replication plasmids. However, pF03-5 contains the typical features observed in the family of theta-replicating plasmids and belongs to the pUCL287 family of theta-replicating plasmids.
Collapse
|
4
|
Cui Y, Hu T, Qu X, Zhang L, Ding Z, Dong A. Plasmids from Food Lactic Acid Bacteria: Diversity, Similarity, and New Developments. Int J Mol Sci 2015; 16:13172-202. [PMID: 26068451 PMCID: PMC4490491 DOI: 10.3390/ijms160613172] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 05/09/2015] [Accepted: 05/22/2015] [Indexed: 12/24/2022] Open
Abstract
Plasmids are widely distributed in different sources of lactic acid bacteria (LAB) as self-replicating extrachromosomal genetic materials, and have received considerable attention due to their close relationship with many important functions as well as some industrially relevant characteristics of the LAB species. They are interesting with regard to the development of food-grade cloning vectors. This review summarizes new developments in the area of lactic acid bacteria plasmids and aims to provide up to date information that can be used in related future research.
Collapse
Affiliation(s)
- Yanhua Cui
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Tong Hu
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Xiaojun Qu
- Institute of Microbiology, Heilongjiang Academy of Sciences, Harbin 150010, China.
| | - Lanwei Zhang
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Zhongqing Ding
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Aijun Dong
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China.
| |
Collapse
|
5
|
Mobilizable Rolling-Circle Replicating Plasmids from Gram-Positive Bacteria: A Low-Cost Conjugative Transfer. Microbiol Spectr 2014; 2:8. [PMID: 25606350 DOI: 10.1128/microbiolspec.plas-0008-2013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Conjugation is a key mechanism for horizontal gene transfer in bacteria. Some plasmids are not self-transmissible but can be mobilized by functions encoded in trans provided by other auxiliary conjugative elements. Although the transfer efficiency of mobilizable plasmids is usually lower than that of conjugative elements, mobilizable plasmidsare more frequently found in nature. In this sense, replication and mobilization can be considered as important mechanisms influencing plasmid promiscuity. Here we review the present available information on two families of small mobilizable plasmids from Gram-positive bacteria that replicate via the rolling-circle mechanism. One of these families, represented by the streptococcal plasmid pMV158, is an interesting model since it contains a specific mobilization module (MOBV) that is widely distributed among mobilizable plasmids. We discuss a mechanism in which the promiscuity of the pMV158 replicon is based on the presence of two origins of lagging strand synthesis. The current strategies to assess plasmid transfer efficiency as well as to inhibit conjugative plasmid transfer are presented. Some applications of these plasmids as biotechnological tools are also reviewed.
Collapse
|
6
|
Lorenzo-Díaz F, Fernández-López C, Garcillán-Barcia MP, Espinosa M. Bringing them together: plasmid pMV158 rolling circle replication and conjugation under an evolutionary perspective. Plasmid 2014; 74:15-31. [PMID: 24942190 PMCID: PMC7103276 DOI: 10.1016/j.plasmid.2014.05.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 05/21/2014] [Accepted: 05/22/2014] [Indexed: 11/29/2022]
Abstract
Rolling circle-replicating plasmids constitute a vast family that is particularly abundant in, but not exclusive of, Gram-positive bacteria. These plasmids are constructed as cassettes that harbor genes involved in replication and its control, mobilization, resistance determinants and one or two origins of lagging strand synthesis. Any given plasmid may contain all, some, or just only the replication cassette. We discuss here the family of the promiscuous streptococcal plasmid pMV158, with emphasis on its mobilization functions: the product of the mobM gene, prototype of the MOBV relaxase family, and its cognate origin of transfer, oriT. Amongst the subfamily of MOBV1 plasmids, three groups of oriT sequences, represented by plasmids pMV158, pT181, and p1414 were identified. In the same subfamily, we found four types of single-strand origins, namely ssoA, ssoU, ssoW, and ssoT. We found that plasmids of the rolling-circle Rep_2 family (to which pMV158 belongs) are more frequently found in Lactobacillales than in any other bacterial order, whereas Rep_1 initiators seemed to prefer hosts included in the Bacillales order. In parallel, MOBV1 relaxases associated with Rep_2 initiators tended to cluster separately from those linked to Rep_1 plasmids. The updated inventory of MOBV1 plasmids still contains exclusively mobilizable elements, since no genes associated with conjugative transfer (other than the relaxase) were detected. These plasmids proved to have a great plasticity at using a wide variety of conjugative apparatuses. The promiscuous recognition of non-cognate oriT sequences and the role of replication origins for lagging-strand origin in the host range of these plasmids are also discussed.
Collapse
Affiliation(s)
- Fabián Lorenzo-Díaz
- Unidad de Investigación, Hospital Universitario Nuestra Señora de Candelaria and Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Centro de Investigaciones Biomédicas de Canarias, Universidad de La Laguna, Santa Cruz de Tenerife, Spain.
| | - Cris Fernández-López
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu, 9, E-28040 Madrid, Spain.
| | - M Pilar Garcillán-Barcia
- Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria - CSIC-SODERCAN, Santander, Cantabria, Spain.
| | - Manuel Espinosa
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu, 9, E-28040 Madrid, Spain.
| |
Collapse
|
7
|
Characterization of the cryptic plasmid pWCZ from Lactobacillus paracasei WCZ isolated from silage. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-013-0717-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
8
|
Characterization of pMRI 5.2, a rolling-circle-type plasmid from Lactobacillus plantarum BFE 5092 which harbours two different replication initiation genes. Plasmid 2013; 69:160-71. [DOI: 10.1016/j.plasmid.2012.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 11/28/2012] [Accepted: 11/29/2012] [Indexed: 12/11/2022]
|
9
|
Characterization of plasmids in a human clinical strain of Lactococcus garvieae. PLoS One 2012; 7:e40119. [PMID: 22768237 PMCID: PMC3387028 DOI: 10.1371/journal.pone.0040119] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 06/01/2012] [Indexed: 02/04/2023] Open
Abstract
The present work describes the molecular characterization of five circular plasmids found in the human clinical strain Lactococcus garvieae 21881. The plasmids were designated pGL1-pGL5, with molecular sizes of 4,536 bp, 4,572 bp, 12,948 bp, 14,006 bp and 68,798 bp, respectively. Based on detailed sequence analysis, some of these plasmids appear to be mosaics composed of DNA obtained by modular exchange between different species of lactic acid bacteria. Based on sequence data and the derived presence of certain genes and proteins, the plasmid pGL2 appears to replicate via a rolling-circle mechanism, while the other four plasmids appear to belong to the group of lactococcal theta-type replicons. The plasmids pGL1, pGL2 and pGL5 encode putative proteins related with bacteriocin synthesis and bacteriocin secretion and immunity. The plasmid pGL5 harbors genes (txn, orf5 and orf25) encoding proteins that could be considered putative virulence factors. The gene txn encodes a protein with an enzymatic domain corresponding to the family actin-ADP-ribosyltransferases toxins, which are known to play a key role in pathogenesis of a variety of bacterial pathogens. The genes orf5 and orf25 encode two putative surface proteins containing the cell wall-sorting motif LPXTG, with mucin-binding and collagen-binding protein domains, respectively. These proteins could be involved in the adherence of L. garvieae to mucus from the intestine, facilitating further interaction with intestinal epithelial cells and to collagenous tissues such as the collagen-rich heart valves. To our knowledge, this is the first report on the characterization of plasmids in a human clinical strain of this pathogen.
Collapse
|
10
|
Asteri IA, Papadimitriou K, Boutou E, Anastasiou R, Pot B, Vorgias CE, Tsakalidou E. Characterization of pLAC1, a cryptic plasmid isolated from Lactobacillus acidipiscis and comparative analysis with its related plasmids. Int J Food Microbiol 2010; 141:222-8. [DOI: 10.1016/j.ijfoodmicro.2010.05.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Revised: 05/17/2010] [Accepted: 05/18/2010] [Indexed: 10/19/2022]
|
11
|
Characterization of a small erythromycin resistance plasmid pLFE1 from the food-isolate Lactobacillus plantarum M345. Plasmid 2009; 61:159-70. [DOI: 10.1016/j.plasmid.2009.01.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
12
|
Characterization of a Rolling-Circle Replication Plasmid pLR1 from Lactobacillus plantarum LR1. Curr Microbiol 2008; 58:106-10. [DOI: 10.1007/s00284-008-9280-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Revised: 08/19/2008] [Accepted: 09/01/2008] [Indexed: 11/26/2022]
|
13
|
Yin S, Hao Y, Zhai Z, Li R, Huang Y, Tian H, Luo Y. Characterization of a cryptic plasmid pM4 fromLactobacillus plantarumM4. FEMS Microbiol Lett 2008; 285:183-7. [DOI: 10.1111/j.1574-6968.2008.01229.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
14
|
Characterisation of pSMA23, a 3.5 kbp plasmid of Lactobacillus casei, and application for heterologous expression in Lactobacillus. Plasmid 2007; 59:11-9. [PMID: 17961648 DOI: 10.1016/j.plasmid.2007.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2007] [Revised: 09/11/2007] [Accepted: 09/12/2007] [Indexed: 11/20/2022]
Abstract
The complete nucleotide sequence of plasmid pSMA23 isolated from Lactobacillus casei A23 was determined. Plasmid pSMA23 is a 3497bp circular molecule with a G+C content of 38.18%. Four putative open reading frames were identified. Based on homology, two orfs were identified as genes encoding replication initiation (Rep) and mobilisation (Mob) protein, respectively. Various regulatory regions like promoters, ribosome binding site (RBS), transcriptional terminators were deduced from the sequences of rep and mob. The origin of replication (dso) was predicted. Shuttle vectors pL142 and pL157 were constructed for Escherichia coli and Lactobacillus using rep gene and ori of pSMA23 for replication in Lactobacillus, the ori of the commercial vector pBluescript SkII+ for replication in E. coli, and the erythromycin and chloramphenicol resistance genes of pE194 and pC194, respectively, as selection markers. Transformants of E. coli and Lactobacillus were obtained on media containing erythromycin and chloramphenicol, respectively, suggesting expression of the ermC and cat194 genes in both organisms. The shsp gene of plasmid pSt04 of Streptococcus thermophilus encoding a small heat shock protein and the Lactobacillus plantarum cbh gene encoding conjugated bile salts hydrolase were cloned and successfully expressed in the heterologous host Lb. casei LK1 with the aid of pSMA23-derived vectors.
Collapse
|
15
|
Molecular organization of plasmid pER13 in Streptococcus thermophilus. Biotechnol Lett 2007; 29:1991-9. [PMID: 17932625 DOI: 10.1007/s10529-007-9542-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2007] [Revised: 09/13/2007] [Accepted: 09/19/2007] [Indexed: 10/22/2022]
Abstract
Molecular features of the 4139-bp plasmid pER13 found in the dairy fermentation bacterium Streptococcus thermophilus ST113 include five open reading frames (ORFs). ORF1, ORF2 and ORF3 encode proteins for transcriptional repression (CopG), replication (RepB) and mobilization (Mob) that share homology with corresponding proteins of the pMV158 plasmid family, while ORF4 and ORF5 encode putative proteins with unspecified functions. Sequence homologies shared with plasmids found in group B and group D streptococci imply the possibility for genetic exchange with the food-grade S. thermophilus. The structural features of pER13 may be useful in designing strategies for gene transfer in lactic fermentation bacteria.
Collapse
|
16
|
Singh SK, Banerjee PC. Nucleotide sequence analysis of cryptic plasmid pAM5 from Acidiphilium multivorum. Plasmid 2007; 58:101-14. [PMID: 17363056 DOI: 10.1016/j.plasmid.2007.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2006] [Revised: 01/15/2007] [Accepted: 01/21/2007] [Indexed: 11/16/2022]
Abstract
Plasmid pAM5 of Acidiphilium multivorum JCM-8867 has been completely sequenced by initial cloning of HindIII-PstI fragments followed by primer walking. It has a size of 5161bp and single site for several restriction enzymes as revealed by DNA sequencing. Sequence analysis predicts five putative open reading frames. ORF1 and ORF3 show significant identity with various plasmid encoded mobilization (Mob) and replication initiation (Rep) proteins, respectively. The putative Mob protein has several characteristics of the MOB(Q) family having the motifs with conserved amino acid residues. Upstream of the Mob ORF, there exists a 34bp oriT region having a nic consensus sequence. The constructed plasmid pSK1 bearing pAM5 mob region can be mobilized to Escherichia coli in presence of conjugative plasmid pRK2013. The replication module comprises of several DnaA like boxes, several perfect direct and inverted repeats, a potential prokaryotic promoter and putative rep gene. The rep module is very similar to several theta replicating iteron family plasmids, suggesting pAM5 replication to follow the same course. Any phenotypic character determinant (e.g., metal resistance, antibiotic resistance etc.) gene is absent in pAM5, suggesting this plasmid to be cryptic in nature. However, a pAM5 derivative plasmid named pSK2, containing the putative pAM5 rep region, can replicate and be stably maintained in Acidiphilium, Acidocella, and E. coli strains; it can also carry foreign DNA fragments. Thus, pSK2 could serve as a cloning shuttle vector between these bacteria. It was observed that pAM5 Rep is essential for pSK2 to replicate in acidophiles. In its natural host, A. multivorum JCM-8867, pAM5 maintains a copy number of 50-60, and its derivative pSK2 maintains a comparatively, higher copy number in E. coli than in acidophiles.
Collapse
Affiliation(s)
- Samarendra K Singh
- Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata 700 032, India
| | | |
Collapse
|
17
|
Van Reenen CA, Van Zyl WH, Dicks LMT. Expression of the immunity protein of plantaricin 423, produced by Lactobacillus plantarum 423, and analysis of the plasmid encoding the bacteriocin. Appl Environ Microbiol 2006; 72:7644-51. [PMID: 17056693 PMCID: PMC1694273 DOI: 10.1128/aem.01428-06] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Plantaricin 423 is a class IIa bacteriocin produced by Lactobacillus plantarum isolated from sorghum beer. It has been previously determined that plantaricin 423 is encoded by a plasmid designated pPLA4, which is now completely sequenced. The plantaricin 423 operon shares high sequence similarity with the operons of coagulin, pediocin PA-1, and pediocin AcH, with small differences in the DNA sequence encoding the mature bacteriocin peptide and the immunity protein. Apart from the bacteriocin operon, no significant sequence similarity could be detected between the DNA or translated sequence of pPLA4 and the available DNA or translated sequences of the plasmids encoding pediocin AcH, pediocin PA-1, and coagulin, possibly indicating a different origin. In addition to the bacteriocin operon, sequence analysis of pPLA4 revealed the presence of two open reading frames (ORFs). ORF1 encodes a putative mobilization (Mob) protein that is homologous to the pMV158 superfamily of mobilization proteins. Highest sequence similarity occurred between this protein and the Mob protein of L. plantarum NCDO 1088. ORF2 encodes a putative replication protein that revealed low sequence similarity to replication proteins of plasmids pLME300 from Lactobacillus fermentum and pYIT356 from Lactobacillus casei. The immunity protein of plantaricin 423 contains 109 amino acids. Although plantaricin 423 shares high sequence similarity with the pediocin PA-1 operon, no cross-reactivity was recorded between the immunity proteins of plantaricin 423 and pediocin PA-1.
Collapse
Affiliation(s)
- C A Van Reenen
- Department of Microbiology, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa
| | | | | |
Collapse
|
18
|
Mesas JM, Rodríguez MC, Alegre MT. pRS4: UN VECTOR DE CLONACIÓN IDÓNEO PARA BACTERIAS ÁCIDO-LÁCTICAS DE USO ALIMENTARIO pRS4: AN APPROPRIATE CLONING VECTOR FOR LACTIC-ACID BACTERIA OF FOOD USE. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/11358120609487681] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
19
|
Horn N, Wegmann U, Narbad A, Gasson MJ. Characterisation of a novel plasmid p9785S from Lactobacillus johnsonii FI9785. Plasmid 2005; 54:176-83. [PMID: 16122563 DOI: 10.1016/j.plasmid.2005.01.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2004] [Revised: 01/26/2005] [Accepted: 01/27/2005] [Indexed: 10/25/2022]
Abstract
Lactobacillus johnsonii FI9785, a strain originally isolated from poultry gastrointestinal tract for its probiotic function as a competitive excluder of pathogens, was found to contain two cryptic plasmids of 3.5 and 25.6 kb. Nucleotide sequence analysis of the entire small plasmid, designated p9785S (3471 bp), indicated a G+C content of 35.8%, and revealed two open reading frames (orfs). The product of orf1 exhibited similarity to the relaxases of mobilizable plasmids, whereas the product of orf2 displayed significant homology to replication proteins of plasmids which use the rolling circle mode of replication. A conserved double-strand origin of replication was also present in p9785S. A definite minus origin was not identified although a region with extensive intrastrand base pairing potential was revealed. A 1.4 kb fragment encoding the chloramphenicol resistance gene was cloned into p9785S and the resulting vector, pFI2431, was stably maintained when introduced into the parent Lactobacillus cells.
Collapse
Affiliation(s)
- Nikki Horn
- Food Safety Science Division, Institute of Food Research, Norwich Research Park, Colney Lane, Norwich, Norfolk NR4 7UA, UK
| | | | | | | |
Collapse
|
20
|
Alegre MT, Rodríguez MC, Mesas JM. Nucleotide sequence, structural organization and host range of pRS4, a small crypticPediococcus pentosaceusplasmid that contains two cassettes commonly found in other lactic acid bacteria. FEMS Microbiol Lett 2005; 250:151-6. [PMID: 16054305 DOI: 10.1016/j.femsle.2005.07.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2005] [Revised: 06/30/2005] [Accepted: 07/05/2005] [Indexed: 11/29/2022] Open
Abstract
The complete nucleotide sequence of the cryptic plasmid pRS4 (3550 bp) from Pediococcus pentosaceus RS4 was determined. Sequence analysis revealed the presence of three open reading frames (ORFs). The putative protein coded by ORF 1 showed 93% identity with the mobilization protein of Lactobacillus casei plasmid pLC88 and 94% identity with a sequenced fragment of the mobilization protein of P. damnosus plasmid pF8801, suggesting a common origin for these three mobilization proteins. The putative protein coded by ORF 2 showed 92% identity with the replication protein of L. plantarum plasmid pWCFS101, a plasmid that replicates via the rolling circle (RC) mechanism, suggesting a similar replication mechanism for pRS4. Supporting this hypothesis, a putative double strand origin (dso) and a region with palindromic sequences that could function as single strand origin (sso), were detected in pRS4. A function could not be assigned to ORF 3. Since ORF 1 exhibits high identity with L. casei plasmid pLC88 but lower identity (58%) with other Lactobacillus plasmids, and ORF 2 exhibits high identity with the L. plantarum plasmid pWCFS101 but lower identity (55-58%) with other Lactobacillus plasmids (including pLC88), two independent cassettes, from different sources, seem to be involved in the structure of pRS4. Plasmids derived from pRS4 containing the chloramphenicol resistance gene were successfully electrotransformed in L. plantarum, L. casei, P. pentosaceus, and Pediococcus acidilactici, suggesting that pRS4 could be used as a cloning vector for lactic acid bacteria. To our knowledge pRS4 is the first RC-replicating plasmid of P. pentosaceus that has been completely sequenced and used as cloning vector.
Collapse
Affiliation(s)
- M Teresa Alegre
- Departamento de Microbiología y Parasitología, Escuela Politécnica Superior, Universidad de Santiago de Compostela, 27002 Lugo, Spain
| | | | | |
Collapse
|