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Boudjelal F, Zitouni A, Bouras N, Spröer C, Klenk HP, Smaoui S, Mathieu F. Rare Halophilic Nocardiopsis from Algerian Saharan Soils as Tools for Biotechnological Processes in Pharmaceutical Industry. BIOMED RESEARCH INTERNATIONAL 2023; 2023:1061176. [PMID: 37284028 PMCID: PMC10241594 DOI: 10.1155/2023/1061176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 05/01/2023] [Accepted: 05/15/2023] [Indexed: 06/08/2023]
Abstract
The Sahara Desert, one of the most extreme ecosystems in the planet, constitutes an unexplored source of microorganisms such as mycelial bacteria. In this study, we investigated the diversity of halophilic actinobacteria in soils collected from five regions of the Algerian Sahara. A total of 23 halophilic actinobacterial strains were isolated by using a humic-vitamin agar medium supplemented with 10% NaCl. The isolated halophilic strains were subjected to taxonomic analysis using a polyphasic approach, which included morphological, chemotaxonomic, physiological (numerical taxonomy), and phylogenetic analyses. The isolates showed abundant growth in CMA (complex medium agar) and TSA (tryptic soy agar) media containing 10% NaCl, and chemotaxonomic characteristics were consistent with their assignment to the genus Nocardiopsis. Analysis of the 16S rRNA sequence of 23 isolates showed five distinct clusters and a similarity level ranging between 98.4% and 99.8% within the Nocardiopsis species. Comparison of their physiological characteristics with the nearest species showed significant differences with the closely related species. Halophilic Nocardiopsis isolated from Algerian Sahara soil represents a distinct phyletic line suggesting a potential new species. Furthermore, the isolated strains of halophilic Nocardiopsis were screened for their antagonistic properties against a broad spectrum of microorganisms by the conventional agar method (agar cylinders method) and found to have the capacity to produce bioactive secondary metabolites. Except one isolate (AH37), all isolated Nocardiopsis showed moderate to high biological activities against Pseudomonas syringae and Salmonella enterica, and some isolates showed activities against Agrobacterium tumefaciens, Serratia marcescens, and Klebsiella pneumoniae. However, no isolates were active against Bacillus subtilis, Aspergillus flavus, or Aspergillus niger. The obtained finding implies that the unexplored extreme environments such as the Sahara contain many new bacterial species as a novel drug source for medical and industrial applications.
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Affiliation(s)
- Farida Boudjelal
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Algiers, Algeria
- Faculty of Biological Sciences (FSB), University of Sciences and Technologies Houari Boumediene (USTHB), BP 32 El Alia, Bab Ezzouar, 16111 Algiers, Algeria
| | - Abdelghani Zitouni
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Algiers, Algeria
| | - Noureddine Bouras
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Algiers, Algeria
- Laboratoire de Valorisation et Conservation des Écosystèmes Arides (LVCEA), Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre, Université de Ghardaia, Ghardaia, Algeria
| | - Cathrin Spröer
- Department Bioinformatics and Databases, Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Brunswick, Germany
| | - Hans-Peter Klenk
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - Slim Smaoui
- Laboratory of Microbial Biotechnology and Engineering Enzymes (LMBEE), Center of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177 3018 Sfax, Tunisia
| | - Florence Mathieu
- Laboratoire de Génie Chimique, UMR 5503 CNRS/INPT/UPS, INP-ENSAT, 1, Université de Toulouse, Avenue de l'Agrobiopôle, 31326 Castanet-Tolosan, France
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Xie F, Pathom-aree W. Actinobacteria From Desert: Diversity and Biotechnological Applications. Front Microbiol 2021; 12:765531. [PMID: 34956128 PMCID: PMC8696123 DOI: 10.3389/fmicb.2021.765531] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 11/08/2021] [Indexed: 12/25/2022] Open
Abstract
Deserts, as an unexplored extreme ecosystem, are known to harbor diverse actinobacteria with biotechnological potential. Both multidrug-resistant (MDR) pathogens and environmental issues have sharply raised the emerging demand for functional actinobacteria. From 2000 to 2021, 129 new species have been continuously reported from 35 deserts worldwide. The two largest numbers are of the members of the genera Streptomyces and Geodermatophilus, followed by other functional extremophilic strains such as alkaliphiles, halotolerant species, thermophiles, and psychrotolerant species. Improved isolation strategies for the recovery of culturable and unculturable desert actinobacteria are crucial for the exploration of their diversity and offer a better understanding of their survival mechanisms under extreme environmental stresses. The main bioprospecting processes involve isolation of target actinobacteria on selective media and incubation and selection of representatives from isolation plates for further investigations. Bioactive compounds obtained from desert actinobacteria are being continuously explored for their biotechnological potential, especially in medicine. To date, there are more than 50 novel compounds discovered from these gifted actinobacteria with potential antimicrobial activities, including anti-MDR pathogens and anti-inflammatory, antivirus, antifungal, antiallergic, antibacterial, antitumor, and cytotoxic activities. A range of plant growth-promoting abilities of the desert actinobacteria inspired great interest in their agricultural potential. In addition, several degradative, oxidative, and other functional enzymes from desert strains can be applied in the industry and the environment. This review aims to provide a comprehensive overview of desert environments as a remarkable source of diverse actinobacteria while such rich diversity offers an underexplored resource for biotechnological exploitations.
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Affiliation(s)
- Feiyang Xie
- Doctor of Philosophy Program in Applied Microbiology (International Program), Faculty of Science, Chiang Mai University, under the CMU Presidential Scholarship, Chiang Mai, Thailand
| | - Wasu Pathom-aree
- Research Center of Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
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Actinobacteria in the Algerian Sahara: Diversity, adaptation mechanism and special unexploited biotopes for the isolation of novel rare taxa. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00928-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Thermo-halotolerant mycelial bacteria from Algerian soils: Isolation, taxonomy and antagonistic properties. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.101972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Li Q, Rückert C, Li G, Huang P, Schneider O, Kalinowski J, Jiang Y, Zotchev SB, Jiang C. Prauserella flavalba sp. nov., a novel species of the genus Prauserella, isolated from alkaline soil. Int J Syst Evol Microbiol 2019; 70:380-387. [PMID: 31671051 DOI: 10.1099/ijsem.0.003768] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-strain positive, mycelium-forming actinomycete, YIM 121212T, was isolated from an alkaline soil sample collected in Yunnan province, PR China. Classification using a polyphasic approach indicated that YIM 121212T represents a member of the genus Prauserella, and is closely related to Prauserella coralliicola SCSIO 11529T (99.31 %), Prauserella endophytica SP28S-3T (99.17 %), Prauserella soli 12-833T (97.43 %), Prauserella oleivorans RIPIT (97.03 %), Prauserella marina MS498T (96.74 %), Prauserella rugosa DSM 43194T (96.54 %) and Prauserella muralis 05-Be-005T (95.92 %). Average nucleotide identity values (ANI) of YIM 121212T to P. coralliicola DSM 45821T and P. endophytica CGMCC 4.7182T were 93.1 and 92.8 %, respectively, which were lower than the threshold of 95 %. The digital DNA-DNA hybridization (dDDH) values between YIM 121212T and these two species were 50.8 and 49.9 %, respectively and thus were also well below the cut off value (>70 %) for species delineation. The DNA G+C content of YIM 121212T is 70.8 mol%. Major fatty acids are iso-C16 : 0, iso-C16 : 1H, C16 : 1ω7c/iso-C15 : 0 2OH, C17 : 1ω6c, and C17 : 1ω8c. The predominant menaquinone is MK-9(H4). The polar lipid profile consists of diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), phosphatidylmethylethanolamine (PME), phosphatidylinositol (PI), and phosphatidylinositol mannoside (PIM). The draft genomes were further analyzed for the presence of secondary metabolite biosynthesis (SMB) gene clusters. On the basis of the above observations, YIM121212T can be distinguished from closely related species belonging to the genus Prauserella. Thus, YIM121212T represents a novel species of the genus Prauserella, for which the name Prauserella flavalba sp. nov. is proposed. The type strain is YIM121212T (=CCTCC AA 2013011T=DSM 45973T).
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Affiliation(s)
- Qinyuan Li
- Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, PR China
| | - Christian Rückert
- Microbial Genomics and Biotechnology Center for Biotechnology (CeBiTec), Universität Bielefeld, Sequenz 1, 33615 Bielefeld, Germany
| | - Guiding Li
- Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, PR China
| | - Ping Huang
- Institute of Food Crop, Yunnan Academy of Agriculture Science, Yunnan Kunming, 650205, PR China
| | - Olha Schneider
- Department of Biotechnology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Jörn Kalinowski
- Department of Pharmacognosy, University of Vienna, 1090 Vienna, Austria
| | - Yi Jiang
- Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, PR China
| | - Sergey B Zotchev
- Department of Pharmacognosy, University of Vienna, 1090 Vienna, Austria
| | - Chenglin Jiang
- Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, PR China
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Djinni I, Defant A, Kecha M, Mancini I. Actinobacteria Derived from Algerian Ecosystems as a Prominent Source of Antimicrobial Molecules. Antibiotics (Basel) 2019; 8:E172. [PMID: 31581466 PMCID: PMC6963827 DOI: 10.3390/antibiotics8040172] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/25/2019] [Accepted: 09/25/2019] [Indexed: 01/19/2023] Open
Abstract
Actinobacteria, in particular "rare actinobacteria" isolated from extreme ecosystems, remain the most inexhaustible source of novel antimicrobials, offering a chance to discover new bioactive metabolites. This is the first overview on actinobacteria isolated in Algeria since 2002 to date with the aim to present their potential in producing bioactive secondary metabolites. Twenty-nine new species and one novel genus have been isolated, mainly from the Saharan soil and palm groves, where 37.93% of the most abundant genera belong to Saccharothrix and Actinopolyspora. Several of these strains were found to produce antibiotics and antifungal metabolites, including 17 new molecules among the 50 structures reported, and some of these antibacterial metabolites have shown interesting antitumor activities. A series of approaches used to enhance the production of bioactive compounds is also presented as the manipulation of culture media by both classical methods and modeling designs through statistical strategies and the associations with diverse organisms and strains. Focusing on the Algerian natural sources of antimicrobial metabolites, this work is a representative example of the potential of a closely combined study on biology and chemistry of natural products.
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Affiliation(s)
- Ibtissem Djinni
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia 06000, Algeria.
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, Trento 38123, Italy.
| | - Andrea Defant
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, Trento 38123, Italy.
| | - Mouloud Kecha
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia 06000, Algeria.
| | - Ines Mancini
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, Trento 38123, Italy.
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Sayed AM, Hassan MHA, Alhadrami HA, Hassan HM, Goodfellow M, Rateb ME. Extreme environments: microbiology leading to specialized metabolites. J Appl Microbiol 2019; 128:630-657. [PMID: 31310419 DOI: 10.1111/jam.14386] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 06/18/2019] [Accepted: 07/10/2019] [Indexed: 12/19/2022]
Abstract
The prevalence of multidrug-resistant microbial pathogens due to the continued misuse and overuse of antibiotics in agriculture and medicine is raising the prospect of a return to the preantibiotic days of medicine at the time of diminishing numbers of drug leads. The good news is that an increased understanding of the nature and extent of microbial diversity in natural habitats coupled with the application of new technologies in microbiology and chemistry is opening up new strategies in the search for new specialized products with therapeutic properties. This review explores the premise that harsh environmental conditions in extreme biomes, notably in deserts, permafrost soils and deep-sea sediments select for micro-organisms, especially actinobacteria, cyanobacteria and fungi, with the potential to synthesize new druggable molecules. There is evidence over the past decade that micro-organisms adapted to life in extreme habitats are a rich source of new specialized metabolites. Extreme habitats by their very nature tend to be fragile hence there is a need to conserve those known to be hot-spots of novel gifted micro-organisms needed to drive drug discovery campaigns and innovative biotechnology. This review also provides an overview of microbial-derived molecules and their biological activities focusing on the period from 2010 until 2018, over this time 186 novel structures were isolated from 129 representatives of microbial taxa recovered from extreme habitats.
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Affiliation(s)
- A M Sayed
- Pharmacognosy Department, Faculty of Pharmacy, Nahda University, Beni-Suef, Egypt
| | - M H A Hassan
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - H A Alhadrami
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia.,Special Infectious Agent Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
| | - H M Hassan
- Pharmacognosy Department, Faculty of Pharmacy, Nahda University, Beni-Suef, Egypt.,Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - M Goodfellow
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - M E Rateb
- School of Computing, Engineering & Physical Sciences, University of the West of Scotland, Paisley, UK
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Djinni I, Defant A, Djoudi W, Chaabane Chaouch F, Souagui S, Kecha M, Mancini I. Modeling improved production of the chemotherapeutic polypeptide actinomycin D by a novel Streptomyces sp. strain from a Saharan soil. Heliyon 2019; 5:e01695. [PMID: 31193702 PMCID: PMC6538969 DOI: 10.1016/j.heliyon.2019.e01695] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 03/30/2019] [Accepted: 05/07/2019] [Indexed: 12/21/2022] Open
Abstract
The novel bioactive actinobacterial strain GSBNT10 obtained from a Saharan soil, was taxonomically characterized using a polyphasic approach. 16S rRNA gene sequence analysis supported the classification of the isolate within the genus Streptomyces indicating it as a novel species. The major metabolite responsible of the bioactivity was purified and structurally characterized as actinomycin D (act-D) by mass spectrometric and nuclear magnetic resonance analyses Plackett-Burman design (PBD) and response surface methodology (RSM) were applied in order to optimize the medium formulation for the production of this bioactive metabolite. By PBD experiments, NaNO3, K2HPO4 and initial pH value were selected as significant variables affecting the metabolite production. Central Composite Design (CCD) showed that adjustment of the fermentative medium at pH 8.25, K2HPO4 at 0.2 gL-1 and NaNO3 at 3.76 gL-1 were the values suiting the production of act-D. Moreover, the results obtained by the statistical approach were confirmed by act-D detection using the HPLC equipped with a diode array detector and coupled online with electrospray-mass spectrometry (ESIMS) technique. act-D production was highly stimulated, obtaining a good yield (656.46 mgL-1) which corresponds to a 58.56% increase compared with the non-optimized conditions and data from LC-ESIMS technique efficiently confirmed the forecast from RSM.
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Affiliation(s)
- Ibtissem Djinni
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Département de Microbiologie, Université de Bejaia, 06000, Algeria.,Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, via Sommarive 14, Povo, I-38123, Trento, Italy
| | - Andrea Defant
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, via Sommarive 14, Povo, I-38123, Trento, Italy
| | - Warda Djoudi
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Département de Microbiologie, Université de Bejaia, 06000, Algeria
| | - Faouzia Chaabane Chaouch
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - Samiha Souagui
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, via Sommarive 14, Povo, I-38123, Trento, Italy
| | - Mouloud Kecha
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Département de Microbiologie, Université de Bejaia, 06000, Algeria
| | - Ines Mancini
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, via Sommarive 14, Povo, I-38123, Trento, Italy
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Dastgheib SMM, Tirandaz H, Moshtaghi Nikou M, Ramezani M, Shavandi M, Amoozegar MA, Ventosa A. Prauserella oleivorans sp. nov., a halophilic and thermotolerant crude-oil-degrading actinobacterium isolated from an oil-contaminated mud pit. Int J Syst Evol Microbiol 2017; 67:3381-3386. [PMID: 28857021 DOI: 10.1099/ijsem.0.002124] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A crude-oil-degrading, Gram-stain-positive actinobacterial strain, RIPIT, was isolated from a soil sample collected from an oil-contaminated mud pit in Khangiran oil and gas field, in the north-east of Iran. RIPIT was strictly aerobic, catalase- and oxidase-positive. The strain grew with 0-12.5 % (w/v) NaCl (optimum 3-5 %), at 25-55 °C (optimum 45 °C) and at pH 6.0-9.5 (optimum pH 7.0). The results of 16S rRNA gene sequence comparative analysis indicated that RIPIT represents a member of the genus Prauserella, with high phylogenetic similarity to Prauserella coralliicola SCSIO 11529T (97.5 %), Prauserella endophytica SP28S-3T (97.5 %) and Prauserella marina MS498T (97.2 %). DNA-DNA relatedness values between the novel strain and P. coralliicola DSM 45821T, P. endophytica DSM 46655T and P. marina DSM 45268T were 28 , 19 and 23 %, respectively. The cell wall peptidoglycan of RIPIT contained meso-diaminopimelic acid as the diamino acid and the whole-cell sugars are galactose and arabinose. The polar lipids pattern contained phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylinositol and two unknown phospholipids. Its cellular fatty acids pattern consisted of C17 : 1ω6c, iso-C16 : 0 and summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2-OH), and the major respiratory quinone was MK-9(H4). The G+C content of the genomic DNA was 69 mol%. On the basis of polyphasic taxonomic data we propose that RIPIT represents a novel species of the genus Prauserella, for which the name Prauserella oleivorans sp. nov. is proposed. The type strain of Prauserellaoleivorans is RIPIT (=IBRC-M 10906T=LMG 28389T).
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Affiliation(s)
| | - Hassan Tirandaz
- Microbiology and Biotechnology Research Group, Research Institute of Petroleum Industry, Tehran, Iran
| | | | - Mohaddaseh Ramezani
- Microorganisms Bank, Iranian Biological Resource Centre (IBRC), ACECR Tehran, Iran
| | - Mahmoud Shavandi
- Microbiology and Biotechnology Research Group, Research Institute of Petroleum Industry, Tehran, Iran
| | - Mohammad Ali Amoozegar
- Extremophiles Laboratory, Department of Microbiology, Faculty of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
| | - Antonio Ventosa
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, 41012 Sevilla, Spain
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Lahoum A, Bouras N, Mathieu F, Schumann P, Spröer C, Klenk HP, Sabaou N. Actinomadura algeriensis sp. nov., an actinobacterium isolated from Saharan soil. Antonie van Leeuwenhoek 2015; 109:159-65. [PMID: 26542839 DOI: 10.1007/s10482-015-0617-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 10/31/2015] [Indexed: 11/26/2022]
Abstract
During the course of a screening programme for new taxa of actinobacteria, a strain designated ACD1(T), was isolated from a Saharan soil in the Hoggar region (Algeria). The taxonomic position of this strain was determined using a polyphasic taxonomic approach. The strain was observed to form extensively branched, non-fragmenting substrate mycelium, and aerial mycelium with straight to flexuous, hooked and irregular spirals (1-2 turns) forming short chains of spores. The diamino acid present in the cell wall is meso-diaminopimelic acid. Galactose, glucose, madurose, mannose and ribose occur in whole-cell hydrolysates. The diagnostic phospholipids detected were diphosphatidylglycerol and phosphatidylinositol. The major menaquinones were identified as MK-9 (H4) and MK-9 (H2). The major fatty acids were found to be C16:0, C18:1 cis9, iso-C16:0 and 10-methyl C18:0. Phylogenetic analysis based on the 16S rRNA gene showed that the strain belongs to the genus Actinomadura, and is closely related to Actinomadura sediminis DSM 45500(T) (98.5 % similarity) and Actinomadura cremea subsp. cremea DSM 43676(T) (98.3 % similarity). However, DNA-DNA hybridization revealed only 48.0 % relatedness with A. sediminis DSM 45500(T) and 33.2 % relatedness with A. cremea subsp. cremea DSM 43676(T). The combined phenotypic and genotypic data showed that the strain represents a novel species of the genus Actinomadura, for which the name Actinomadura algeriensis sp. nov. is proposed, with the type strain ACD1(T) (= DSM 46744(T) = CECT 8841(T)).
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Affiliation(s)
- Abdelhadi Lahoum
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - Noureddine Bouras
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Alger, Algeria
- Département de Biologie, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre, Université de Ghardaïa, BP 455, 47000, Ghardaïa, Algeria
| | - Florence Mathieu
- Laboratoire de Génie Chimique UMR 5503 (CNRS/INPT/UPS), Université de Toulouse, INP de Toulouse/ENSAT, 1, Avenue de l'Agrobiopôle, Castanet-Tolosan cedex, France
| | - Peter Schumann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124, Braunschweig, Germany
| | - Cathrin Spröer
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124, Braunschweig, Germany
| | - Hans-Peter Klenk
- School of Biology, Newcastle University, Ridley Building, Newcastle upon Tyne, NE1 7RU, UK.
| | - Nasserdine Sabaou
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Alger, Algeria.
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