1
|
Riascos C, Martínez-Carrasco A, Díaz M, Santamaría RI. Role of fourteen XRE-DUF397 pairs from Streptomyces coelicolor as regulators of antibiotic production and differentiation. New players in a complex regulatory network. Front Microbiol 2023; 14:1217350. [PMID: 37492264 PMCID: PMC10364602 DOI: 10.3389/fmicb.2023.1217350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 06/19/2023] [Indexed: 07/27/2023] Open
Abstract
Bacteria of the genus Streptomyces have a plethora of transcriptional regulators, among which the xenobiotic response element (XRE) plays an important role. In this organism, XRE regulators are often followed downstream by small proteins of unknown function containing a DUF397 domain. It has been proposed that XRE/DUF397 pairs constitute type II toxin-antitoxin (TA) systems. However, previous work carried out by our group has shown that one of these systems is a strong activator of antibiotic production in S. coelicolor and other Streptomyces species. In this work, we have studied the overexpression of fourteen XRE/DUF397 pairs present in the S. coelicolor genome and found that none behave as a type II TA system. Instead, they act as pleiotropic regulators affecting, in a dependent manner, antibiotic production and morphological differentiation on different culture media. After deleting, individually, six XRE/DUF397 pairs (those systems producing more notable phenotypic changes when overexpressed: SCO2246/45, SCO2253/52, SCO4176/77, SCO4678/79, SCO6236/35, and SCO7615/16), the pair SCO7615/16 was identified as producing the most dramatic differences as compared to the wild-type strain. The SCO7615/16 mutant had a different phenotype on each of the media tested (R2YE, LB, NMMP, YEPD, and MSA). In particular, on R2YE and YEPD media, a bald phenotype was observed even after 7 days, with little or no actinorhodin (ACT) production. Lower ACT production was also observed on LB medium, but the bacteria were able to produce aerial mycelium. On NMMP medium, the mutant produced a larger amount of ACT as compared with the wild-type strain.
Collapse
|
2
|
Ma W, Zheng X, Li L, Shen J, Li W, Gao Y. Changes in the gut microbiota of honey bees associated with jujube flower disease. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 198:110616. [PMID: 32334202 DOI: 10.1016/j.ecoenv.2020.110616] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 06/11/2023]
Abstract
Honeybees are prone to poisoning after collecting jujube nectar during the jujube flowering period ('honeybee's jujube flower disease'). To explore the mechanism of honeybee poisoning, the gut microbiota of honeybees undergoing the disease were characterised based on amplicon sequencing of the 16 S rRNA gene. Our results showed that the composition and diversity of the gut microbiota were significantly altered in diseased honeybees. We observed a decrease in the relative abundance of Proteobacteria and increased abundances of Firmicutes and Actinobacteria in the midgut and hindgut of diseased honeybees. Moreover, linear discriminant analysis (LDA) effect size revealed significantly selected enrichment of Fructobacillus and Snodgrassella in the midguts from diseased honeybees and Lactobacillus, Bifidobacterium, and Snodgrassella in the hindguts from diseased honeybees. Tax4Fun anylasis indicated that the functional potential of the diseased honeybee gut bacterial community was significantly changed relative to the healthy honeybee. Carbohydrate metabolism, nucleotides metabolism, amino acid synthesis metabolism, coenzyme and vitamins metabolism were increased, while energy metabolism and xenobiotic biodegradation and metabolism were decreased in the diseased honeybees. These results provide a new perspective for evaluating the response of honeybees to jujube flower disease based on changes in the intestinal microflora.
Collapse
Affiliation(s)
- WeiHua Ma
- Institute of Horticulture, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi, China.
| | - Xianyun Zheng
- Institute of Environmental Science, Shanxi University, Taiyuan, Shanxi, China.
| | - Lixin Li
- Institute of Horticulture, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi, China
| | - Jinshan Shen
- Institute of Horticulture, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi, China
| | - Wanghong Li
- School of Physical Exercise and Education, Shanxi University, Taiyuan, Shanxi, China
| | - Ye Gao
- School of Physical Exercise and Education, Shanxi University, Taiyuan, Shanxi, China
| |
Collapse
|
3
|
Fang S, Chen X, Zhou L, Wang C, Chen Q, Lin R, Xiao T, Gan Q. Faecal microbiota and functional capacity associated with weaning weight in meat rabbits. Microb Biotechnol 2019; 12:1441-1452. [PMID: 31571427 PMCID: PMC6801154 DOI: 10.1111/1751-7915.13485] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 05/15/2019] [Accepted: 08/15/2019] [Indexed: 12/18/2022] Open
Abstract
Weaning weight is an important economic trait in the meat rabbit industry. Evidence has linked the gut microbiota to health and production performance in rabbits. However, the effect of gut microbiota on meat rabbit weaning weight remains unclear. In this study, we performed 16S rRNA gene sequencing analysis of 135 faecal samples from commercial Ira rabbits. We detected 50 OTUs significantly associated with weaning weight. OTUs that showed positive associations with weaning weight were mostly members of the family Ruminococcaceae which are important in degrading dietary fibres and producing butyrate. On the contrary, OTUs annotated to genera Blautia, Lachnoclostridium and Butyricicoccus correlated with fat deposition were negatively associated with weaning weight. Predicted functional capacity analysis revealed that 91 KOs and 26 KEGG pathways exhibited potential correlations with weaning weight. We found that gut microbiota involved in the metabolism of amino acids, butanoate, energy and monosaccharides affected weaning weight. Additionally, cross-validation analysis indicated that 16.16% of the variation in weaning weight was explained by the gut microbiome. Our findings provide important information to improve weaning weight of meat rabbits by modulating their gut microbiome.
Collapse
Affiliation(s)
- Shaoming Fang
- College of Animal ScienceFujian Agriculture and Forestry UniversityFuzhouChina
| | - Xuan Chen
- College of Life ScienceFujian Agriculture and Forestry UniversityFuzhouChina
| | - Liwen Zhou
- College of Animal ScienceFujian Agriculture and Forestry UniversityFuzhouChina
| | - Chongchong Wang
- College of Animal ScienceFujian Agriculture and Forestry UniversityFuzhouChina
| | - Qiaohui Chen
- College of Animal ScienceFujian Agriculture and Forestry UniversityFuzhouChina
| | - Ruiyi Lin
- College of Animal ScienceFujian Agriculture and Forestry UniversityFuzhouChina
| | - Tianfang Xiao
- College of Animal ScienceFujian Agriculture and Forestry UniversityFuzhouChina
| | - QianFu Gan
- College of Animal ScienceFujian Agriculture and Forestry UniversityFuzhouChina
| |
Collapse
|
4
|
Santamaría RI, Sevillano L, Martín J, Genilloud O, González I, Díaz M. The XRE-DUF397 Protein Pair, Scr1 and Scr2, Acts as a Strong Positive Regulator of Antibiotic Production in Streptomyces. Front Microbiol 2018; 9:2791. [PMID: 30524403 PMCID: PMC6262351 DOI: 10.3389/fmicb.2018.02791] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 10/30/2018] [Indexed: 12/18/2022] Open
Abstract
The xenobiotic response element (XRE) transcription factors belong to a regulator family frequently found in Streptomyces that are often followed by small proteins with a DUF397 domain. In fact, the pair XRE-DUF397 has been proposed to comprise toxin–antitoxin (TA) type II systems. In this work, we demonstrate that one of these putative TA-systems, encoded by the genes SCO4441 and SCO4442 of Streptomyces coelicolor, and denominated Scr1/Scr2 (which stands for S. coelicolorregulator), does not behave as a toxin–antitoxin system under the conditions used as was originally expected. Instead the pair Scr1/Scr2 acts as a strong positive regulator of endogenous antibiotic production in S. coelicolor. The analysis of the 19 Streptomyces strains tested determined that overexpression of the pair Scr1/Scr2 drastically induces the production of antibiotics not only in S. coelicolor, but also in Streptomyces lividans, Streptomyces peucetius, Streptomyces steffisburgensis and Streptomyces sp. CA-240608. Our work also shows that Scr1 needs Scr2 to exert positive regulation on antibiotic production.
Collapse
Affiliation(s)
- Ramón I Santamaría
- Instituto de Biología Funcional y Genómica, Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca, Salamanca, Spain
| | - Laura Sevillano
- Instituto de Biología Funcional y Genómica, Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca, Salamanca, Spain
| | - Jesús Martín
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Granada, Spain
| | - Olga Genilloud
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Granada, Spain
| | - Ignacio González
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Granada, Spain
| | - Margarita Díaz
- Instituto de Biología Funcional y Genómica, Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca, Salamanca, Spain
| |
Collapse
|
5
|
Yang H, Huang X, Fang S, He M, Zhao Y, Wu Z, Yang M, Zhang Z, Chen C, Huang L. Unraveling the Fecal Microbiota and Metagenomic Functional Capacity Associated with Feed Efficiency in Pigs. Front Microbiol 2017; 8:1555. [PMID: 28861066 PMCID: PMC5559535 DOI: 10.3389/fmicb.2017.01555] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 07/31/2017] [Indexed: 12/19/2022] Open
Abstract
Gut microbiota plays fundamental roles in energy harvest, nutrient digestion, and intestinal health, especially in processing indigestible components of polysaccharides in diet. Unraveling the microbial taxa and functional capacity of gut microbiome associated with feed efficiency can provide important knowledge to improve pig feed efficiency in swine industry. In the current research, we studied the association of fecal microbiota with feed efficiency in 280 commercial Duroc pigs. All experimental pigs could be clustered into two enterotype-like groups. Different enterotypes showed the tendency of association with the feed efficiency (P = 0.07). We further identified 31 operational taxonomic units (OTUs) showing the potential associations with porcine feed efficiency. These OTUs were mainly annotated to the bacteria related to the metabolisms of dietary polysaccharides. Although we did not identify the RFI-associated bacterial species at FDR < 0.05 level, metagenomic sequencing analysis did find the distinct function capacities of gut microbiome between the high and low RFI pigs (FDR < 0.05). The KEGG orthologies related to nitrogen metabolism, amino acid metabolism, and transport system, and eight KEGG pathways including glycine, serine, and threonine metabolism were positively associated with porcine feed efficiency. We inferred that gut microbiota might improve porcine feed efficiency through promoting intestinal health by the SCFAs produced by fermenting dietary polysaccharides and improving the utilization of dietary protein. The present results provided important basic knowledge for improving porcine feed efficiency through modulating gut microbiome.
Collapse
Affiliation(s)
- Hui Yang
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural UniversityNanchang, China.,College of Bioscience and Engineering, Jiangxi Agricultural UniversityNanchang, China
| | - Xiaochang Huang
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural UniversityNanchang, China
| | - Shaoming Fang
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural UniversityNanchang, China
| | - Maozhang He
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural UniversityNanchang, China
| | - Yuanzhang Zhao
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural UniversityNanchang, China
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, Guangdong Wens Foodstuff Co. Ltd.Xinxing, China
| | - Ming Yang
- National Engineering Research Center for Breeding Swine Industry, Guangdong Wens Foodstuff Co. Ltd.Xinxing, China
| | - Zhiyan Zhang
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural UniversityNanchang, China
| | - Congying Chen
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural UniversityNanchang, China
| | - Lusheng Huang
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural UniversityNanchang, China
| |
Collapse
|
6
|
Sevillano L, Vijgenboom E, van Wezel GP, Díaz M, Santamaría RI. New approaches to achieve high level enzyme production in Streptomyces lividans. Microb Cell Fact 2016; 15:28. [PMID: 26846788 PMCID: PMC4743123 DOI: 10.1186/s12934-016-0425-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 01/19/2016] [Indexed: 11/29/2022] Open
Abstract
Background Actinomycetes are saprophytic soil bacteria, and a rich source of industrial enzymes. While some of these enzymes can be produced using well-characterized production platforms such as Escherichia coli or Bacillus subtilis,Streptomyces lividans may be the preferred host for proper folding and efficient secretion of active enzymes. A combination of promoters, signal peptides and hosts were tested in order to obtain the best protein expression in this actinomycete. The xylanase, Xys1, from S. halstedii, the α-amylase, Amy, from S. griseus and the small laccase, SLAC, from S. coelicolor were used as reporters. Results The promoters xysAp from S. halstedii JM8 and pstSp from S. lividans were the most efficient among those tested. An improvement of 17 % was obtained in xylanase activity when the signal peptide of the α-amylase protein (Amy) of S. griseus IMRU3570 was used to direct its secretion. Enhanced expression of SsgA, a protein that plays a role in processes that require cell-wall remodelling, resulted in a improvement of 40 and 70 % of xylanase and amylase production, respectively. Deletion of genes SLI7232 and SLI4452 encoding putative repressors of xysAp provided improvement of production up to 70 % in the SLI7232 deletion strain. However, full derepression of this promoter activity was not obtained under the conditions assayed. Conclusions Streptomyces lividans is a frequently used platform for industrial enzyme production and a rational strain-development approach delivered significant improvement of protein production by this host. Electronic supplementary material The online version of this article (doi:10.1186/s12934-016-0425-7) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Laura Sevillano
- Instituto de Biología Funcional y Genómica/Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca, C/Zacarías González nº 2, 37007, Salamanca, Spain.
| | - Erik Vijgenboom
- Molecular Biotechnology, IBL, Sylvius Laboratory, Leiden University, Leiden, The Netherlands.
| | - Gilles P van Wezel
- Molecular Biotechnology, IBL, Sylvius Laboratory, Leiden University, Leiden, The Netherlands.
| | - Margarita Díaz
- Instituto de Biología Funcional y Genómica/Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca, C/Zacarías González nº 2, 37007, Salamanca, Spain.
| | - Ramón I Santamaría
- Instituto de Biología Funcional y Genómica/Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca, C/Zacarías González nº 2, 37007, Salamanca, Spain.
| |
Collapse
|
7
|
Rodríguez H, Rico S, Yepes A, Franco-Echevarría E, Antoraz S, Santamaría RI, Díaz M. The two kinases, AbrC1 and AbrC2, of the atypical two-component system AbrC are needed to regulate antibiotic production and differentiation in Streptomyces coelicolor. Front Microbiol 2015; 6:450. [PMID: 26029189 PMCID: PMC4428217 DOI: 10.3389/fmicb.2015.00450] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 04/26/2015] [Indexed: 01/17/2023] Open
Abstract
Two-component systems (TCSs) are the most important sensing mechanisms in bacteria. In Streptomyces, TCSs-mediated responses to environmental stimuli are involved in the regulation of antibiotic production. This study examines the individual role of two histidine kinases (HKs), AbrC1 and AbrC2, which form part of an atypical TCS in Streptomyces coelicolor. qRT-PCR analysis of the expression of both kinases demonstrated that both are expressed at similar levels in NB and NMMP media. Single deletion of abrC1 elicited a significant increase in antibiotic production, while deletion of abrC2 did not have any clear effect. The origin of this phenotype, probably related to the differential phosphorylation ability of the two kinases, was also explored indirectly, analyzing the toxic phenotypes associated with high levels of phosphorylated RR. The higher the AbrC3 regulator phosphorylation rate, the greater the cell toxicity. For the first time, the present work shows in Streptomyces the combined involvement of two different HKs in the response of a regulator to environmental signals. Regarding the possible applications of this research, the fact that an abrC1 deletion mutant overproduces three of the S. coelicolor antibiotics makes this strain an excellent candidate as a host for the heterologous production of secondary metabolites.
Collapse
Affiliation(s)
- Héctor Rodríguez
- Departamento de Microbiología y Genética, Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca Salamanca, Spain
| | - Sergio Rico
- Departamento de Microbiología y Genética, Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca Salamanca, Spain
| | - Ana Yepes
- Institute for Molecular Infection Biology, Julius-Maximilians-Universität Würzburg Würzburg, Germany
| | - Elsa Franco-Echevarría
- Instituto de Química Física "Rocasolano", Consejo Superior de Investigaciones Científicas Madrid, Spain
| | - Sergio Antoraz
- Departamento de Microbiología y Genética, Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca Salamanca, Spain
| | - Ramón I Santamaría
- Departamento de Microbiología y Genética, Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca Salamanca, Spain
| | - Margarita Díaz
- Departamento de Microbiología y Genética, Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca Salamanca, Spain
| |
Collapse
|
8
|
Isolation, Production, and Characterization of Thermotolerant Xylanase from Solvent TolerantBacillus vallismortisRSPP-15. INT J POLYM SCI 2015. [DOI: 10.1155/2015/986324] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Sixty bacterial strains isolated from the soils sample in the presence of organic solvent were screened for xylanase production. Among them, strain RSPP-15 showed the highest xylanase activity which was identified asBacillus vallismortis. The isolate showed maximum xylanase production (3768 U/mL) in the presence of birch wood xylan and beef extract at 55°C pH 7.0 within 48 h of incubation. The enzyme activity and stability were increased 181.5, 153.7, 147.2, 133.6, and 127.9% and 138.2, 119.3, 113.9, 109, and 104.5% in the presence of Co2+, Ca2+, Mg+2, Zn+2, and Fe+3ions (10 mM). Xylanase activity and stability were strongly inhibited in the presence of Hg and Cu ions. The enzyme was also stable in the presence of 30% ofn-dodecane, isooctane,n-decane, xylene, toluene,n-hexane,n-butanol, and cyclohexane, respectively. The presence of benzene, methanol, and ethanol marginally reduced the xylanase stability, respectively. This isolate may be useful in several industrial applications owing to its thermotolerant and organic solvent resistance characteristics.
Collapse
|
9
|
Regulation of the AbrA1/A2 two-component system in Streptomyces coelicolor and the potential of its deletion strain as a heterologous host for antibiotic production. PLoS One 2014; 9:e109844. [PMID: 25303210 PMCID: PMC4193843 DOI: 10.1371/journal.pone.0109844] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 07/27/2014] [Indexed: 12/16/2022] Open
Abstract
The Two-Component System (TCS) AbrA1/A2 from Streptomyces coelicolor M145 is a negative regulator of antibiotic production and morphological differentiation. In this work we show that it is able to auto-regulate its expression, exerting a positive induction of its own operon promoter, and that its activation is dependent on the presence of iron. The overexpression of the abrA2 response regulator (RR) gene in the mutant ΔabrA1/A2 results in a toxic phenotype. The reason is an excess of phosphorylated AbrA2, as shown by phosphoablative and phosphomimetic AbrA2 mutants. Therefore, non-cognate histidine kinases (HKs) or small phospho-donors may be responsible for AbrA2 phosphorylation in vivo. The results suggest that in the parent strain S. coelicolor M145 the correct amount of phosphorylated AbrA2 is adjusted through the phosphorylation-dephosphorylation activity rate of the HK AbrA1. Furthermore, the ABC transporter system, which is part of the four-gene operon comprising AbrA1/A2, is necessary to de-repress antibiotic production in the TCS null mutant. Finally, in order to test the possible biotechnological applications of the ΔabrA1/A2 strain, we demonstrate that the production of the antitumoral antibiotic oviedomycin is duplicated in this strain as compared with the production obtained in the wild type, showing that this strain is a good host for heterologous antibiotic production. Thus, this genetically modified strain could be interesting for the biotechnology industry.
Collapse
|
10
|
Liu Z, Xu J, Duan S, Zhang J, Zheng K, Feng X, Cheng L. Expression of modified xynA gene fragments from Bacillus subtilis BE-91. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-013-0642-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
11
|
Sevillano L, Díaz M, Santamaría RI. Stable expression plasmids for Streptomyces based on a toxin-antitoxin system. Microb Cell Fact 2013; 12:39. [PMID: 23617558 PMCID: PMC3655019 DOI: 10.1186/1475-2859-12-39] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 04/22/2013] [Indexed: 11/10/2022] Open
Abstract
Background Bacteria included in the genus Streptomyces exhibit several attractive characteristics that make them adequate hosts for the heterologous expression of proteins. One of them is that some of its species have a high secretion capacity and hence the protein of interest could be released to the culture supernatant, facilitating downstream processing. To date, all the expression vectors described for these bacteria contain antibiotic resistance genes as selection markers. However, the use of antibiotics to produce proteins at industrial level is currently becoming more restricted owing to the possibility of contamination of the final product. In this report, we describe the use of the S. lividans yefM/yoeBsl toxin-antitoxin system to develop a stable plasmid expression system. Results In order to use the yefM/yoeBsl system to stabilize expression plasmids in Streptomyces, a S. lividans mutant strain that contained only the toxin gene (yoeBsl) in its genome and the antitoxin gene (yefMsl) located in a temperature-sensitive plasmid was constructed and used as host. This strain was transformed with an expression plasmid harbouring both the antitoxin gene and the gene encoding the protein of interest. Thus, after elimination of the temperature-sensitive plasmid, only cells with the expression plasmid were able to survive. On using this system, two proteins - an α-amylase from S. griseus and a xylanase from S. halstedii - were overproduced without the addition of antibiotic to the culture medium. The production of both proteins was high, even after long incubations (8 days), and after serial subcultures, confirming the stability of the plasmids without antibiotic selection. Conclusions This is the first report that describes the use of a toxin-antitoxin system to maintain high -copy plasmids in Streptomyces. This finding could be a valuable tool for using Streptomyces as a host to produce proteins at the industrial and pharmaceutical levels without the use of antibiotics in the production step.
Collapse
Affiliation(s)
- Laura Sevillano
- Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas/Universidad de Salamanca, Salamanca 37007, Spain
| | | | | |
Collapse
|
12
|
Production of xylo-oligosaccharides by immobilized-stabilized derivatives of endo-xylanase from Streptomyces halstedii. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.01.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
13
|
Sevillano L, Díaz M, Yamaguchi Y, Inouye M, Santamaría RI. Identification of the first functional toxin-antitoxin system in Streptomyces. PLoS One 2012; 7:e32977. [PMID: 22431991 PMCID: PMC3303803 DOI: 10.1371/journal.pone.0032977] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Accepted: 02/03/2012] [Indexed: 11/18/2022] Open
Abstract
Toxin-antitoxin (TA) systems are widespread among the plasmids and genomes of bacteria and archaea. This work reports the first description of a functional TA system in Streptomyces that is identical in two species routinely used in the laboratory: Streptomyces lividans and S. coelicolor. The described system belongs to the YefM/YoeB family and has a considerable similarity to Escherichia coli YefM/YoeB (about 53% identity and 73% similarity). Lethal effect of the S. lividans putative toxin (YoeBsl) was observed when expressed alone in E. coli SC36 (MG1655 ΔyefM-yoeB). However, no toxicity was obtained when co-expression of the antitoxin and toxin (YefM/YoeBsl) was carried out. The toxic effect was also observed when the yoeBsl was cloned in multicopy in the wild-type S. lividans or in a single copy in a S. lividans mutant, in which this TA system had been deleted. The S. lividans YefM/YoeBsl complex, purified from E. coli, binds with high affinity to its own promoter region but not to other three random selected promoters from Streptomyces. In vivo experiments demonstrated that the expression of yoeBsl in E. coli blocks translation initiation processing mRNA at three bases downstream of the initiation codon after 2 minutes of induction. These results indicate that the mechanism of action is identical to that of YoeB from E. coli.
Collapse
Affiliation(s)
- Laura Sevillano
- Instituto de Biología Funcional y Genómica/Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain
| | - Margarita Díaz
- Instituto de Biología Funcional y Genómica/Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain
| | - Yoshihiro Yamaguchi
- Department of Biochemistry, Center for Advanced Biotechnology and Medicine, Robert Wood Johnson Medical School, Piscataway, New Jersey, United States of America
| | - Masayori Inouye
- Department of Biochemistry, Center for Advanced Biotechnology and Medicine, Robert Wood Johnson Medical School, Piscataway, New Jersey, United States of America
| | - Ramón I. Santamaría
- Instituto de Biología Funcional y Genómica/Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain
- * E-mail:
| |
Collapse
|
14
|
Initiation of polyene macrolide biosynthesis: interplay between polyketide synthase domains and modules as revealed via domain swapping, mutagenesis, and heterologous complementation. Appl Environ Microbiol 2011; 77:6982-90. [PMID: 21821762 DOI: 10.1128/aem.05781-11] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Polyene macrolides are important antibiotics used to treat fungal infections in humans. In this work, acyltransferase (AT) domain swaps, mutagenesis, and cross-complementation with heterologous polyketide synthase domain (PKS) loading modules were performed in order to facilitate production of new analogues of the polyene macrolide nystatin. Replacement of AT(0) in the nystatin PKS loading module NysA with the propionate-specific AT(1) from the nystatin PKS NysB, construction of hybrids between NysA and the loading module of rimocidin PKS RimA, and stepwise exchange of specific amino acids in the AT(0) domain by site-directed mutagenesis were accomplished. However, none of the NysA mutants constructed was able to initiate production of new nystatin analogues. Nevertheless, many NysA mutants and hybrids were functional, providing for different levels of nystatin biosynthesis. An interplay between certain residues in AT(0) and an active site residue in the ketosynthase (KS)-like domain of NysA in initiation of nystatin biosynthesis was revealed. Some hybrids between the NysA and RimA loading modules carrying the NysA AT(0) domain were able to prime rimocidin PKS with both acetate and butyrate units upon complementation of a rimA-deficient mutant of the rimocidin/CE-108 producer Streptomyces diastaticus. Expression of the PimS0 loading module from the pimaricin producer in the same host, however, resulted in production of CE-108 only. Taken together, these data indicate relaxed substrate specificity of NysA AT(0) domain, which is counteracted by a strict specificity of the first extender module KS domain in the nystatin PKS of Streptomyces noursei.
Collapse
|
15
|
Post-translational processing of modular xylanases from Streptomyces is dependent on the carbohydrate-binding module. J Ind Microbiol Biotechnol 2010; 38:1419-26. [PMID: 21181427 DOI: 10.1007/s10295-010-0927-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 12/06/2010] [Indexed: 10/18/2022]
Abstract
Xylanases are very often modular enzymes composed of one or more catalytic domains and carbohydrate-binding modules (CBMs) connected by a flexible linker region. Usually, when these proteins are processed they lose their carbohydrate-binding capacity. Here, the role of the linker regions and cellulose- or xylan-binding domains in the processing of Xys1L from Streptomyces halstedii JM8 and Xyl30L from Streptomyces avermitilis UAH30 was studied. Xys1 variants with different linker lengths were tested, these being unable to avoid protein processing. Moreover, several fusion proteins between the Xys1 and Xyl30 domains were obtained and their proteolytic stability was studied. We demonstrate that CBM processing takes place even in the complete absence of the linker sequence. We also show that the specific carbohydrate module determines this cleavage in the proteins studied.
Collapse
|
16
|
Magdevska V, Gaber R, Goranovič D, Kuščer E, Boakes S, Durán Alonso MB, Santamaría RI, Raspor P, Leadlay PF, Fujs S, Petković H. Robust reporter system based on chalcone synthase rppA gene from Saccharopolyspora erythraea. J Microbiol Methods 2010; 83:111-9. [PMID: 20709115 DOI: 10.1016/j.mimet.2010.08.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2010] [Revised: 08/02/2010] [Accepted: 08/02/2010] [Indexed: 11/27/2022]
Affiliation(s)
- V Magdevska
- Acies Bio d.o.o., Tehnološki Park 21, SI-1000 Ljubljana, Slovenia
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Díaz M, Ferreras E, Moreno R, Yepes A, Berenguer J, Santamaría R. High-level overproduction of Thermus enzymes in Streptomyces lividans. Appl Microbiol Biotechnol 2008; 79:1001-8. [PMID: 18461317 DOI: 10.1007/s00253-008-1495-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 04/03/2008] [Accepted: 04/05/2008] [Indexed: 11/25/2022]
Abstract
Biotechnology needs to explore the capacity of different organisms to overproduce proteins of interest at low cost. In this paper, we show that Streptomyces lividans is a suitable host for the expression of Thermus thermophilus genes and report the overproduction of the corresponding proteins. This capacity was corroborated after cloning the genes corresponding to an alkaline phosphatase (a periplasmic enzyme in T. thermophilus) and that corresponding to a beta-glycosidase (an intracellular enzyme) in Escherichia coli and in S. lividans. Comparison of the production in both hosts revealed that the expression of active protein achieved in S. lividans was much higher than in E. coli, especially in the case of the periplasmic enzyme. In fact, the native signal peptide of the T. thermophilus phosphatase was functional in S. lividans, being processed at the same peptide bond in both organisms, allowing the overproduction and secretion of this protein to the S. lividans culture supernatant. As in E. coli, the thermostability of the expressed proteins allowed a huge purification factor upon thermal denaturation and precipitation of the host proteins. We conclude that S. lividans is a very efficient and industry-friendly host for the expression of thermophilic proteins from Thermus spp.
Collapse
Affiliation(s)
- Margarita Díaz
- Instituto de Microbiología Bioquímica, Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca, Edificio Departamental, Campus Miguel de Unamuno, 37007 Salamanca, Spain.
| | | | | | | | | | | |
Collapse
|