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Ghezzi D, Salvi L, Costantini PE, Firrincieli A, Iorio M, Lopo E, Sosio M, Elbanna AH, Khalil ZG, Capon RJ, De Waele J, Vergara F, Sauro F, Cappelletti M. Ancient and remote quartzite caves as a novel source of culturable microbes with biotechnological potential. Microbiol Res 2024; 286:127793. [PMID: 38901277 DOI: 10.1016/j.micres.2024.127793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 05/23/2024] [Accepted: 05/29/2024] [Indexed: 06/22/2024]
Abstract
Quartzite caves located on table-top mountains (tepuis) in the Guyana Shield, are ancient, remote, and pristine subterranean environments where microbes have evolved peculiar metabolic strategies to thrive in silica-rich, slightly acidic and oligotrophic conditions. In this study, we explored the culturable fraction of the microbiota inhabiting the (ortho)quartzite cave systems in Venezuelan tepui (remote table-top mountains) and we investigated their metabolic and enzymatic activities in relation with silica solubilization and extracellular hydrolytic activities as well as the capacity to produce antimicrobial compounds. Eighty microbial strains were isolated with a range of different enzymatic capabilities. More than half of the isolated strains performed at least three enzymatic activities and four bacterial strains displayed antimicrobial activities. The antimicrobial producers Paraburkholderia bryophila CMB_CA002 and Sphingomonas sp. MEM_CA187, were further analyzed by conducting chemotaxonomy, phylogenomics, and phenomics. While the isolate MEM_CA187 represents a novel species of the genus Sphingomonas, for which the name Sphingomonas imawarii sp. nov. is proposed, P. bryophila CMB_CA002 is affiliated with a few strains of the same species that are antimicrobial producers. Chemical analyses demonstrated that CMB_CA002 produces ditropolonyl sulfide that has a broad range of activity and a possibly novel siderophore. Although the antimicrobial compounds produced by MEM_CA187 could not be identified through HPLC-MS analysis due to the absence of reference compounds, it represents the first soil-associated Sphingomonas strain with the capacity to produce antimicrobials. This work provides first insights into the metabolic potential present in quartzite cave systems pointing out that these environments are a novel and still understudied source of microbial strains with biotechnological potential.
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Affiliation(s)
- Daniele Ghezzi
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna 40126, Italy
| | - Luca Salvi
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna 40126, Italy
| | - Paolo E Costantini
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna 40126, Italy
| | - Andrea Firrincieli
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna 40126, Italy; Department for Innovation in Biological, Agro-Food and Forest systems, University of Tuscia, Viterbo 01100, Italy
| | | | - Ettore Lopo
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna 40126, Italy
| | | | - Ahmed H Elbanna
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia; Department of Pharmacognosy, Cairo University, Cairo 11562, Egypt
| | - Zeinab G Khalil
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Robert J Capon
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Jo De Waele
- Department of Biological, Geological, and Environmental Sciences, University of Bologna, Bologna 40126, Italy; La Venta Geographic Explorations Association, Treviso 31100, Italy
| | - Freddy Vergara
- La Venta Geographic Explorations Association, Treviso 31100, Italy; Teraphosa Exploring Team, Puerto Ordaz, Venezuela
| | - Francesco Sauro
- La Venta Geographic Explorations Association, Treviso 31100, Italy
| | - Martina Cappelletti
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna 40126, Italy; La Venta Geographic Explorations Association, Treviso 31100, Italy.
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Wissner JL, Parada-Fabián JC, Márquez-Velázquez NA, Escobedo-Hinojosa W, Gaudêncio SP, Prieto-Davó A. Diversity and Bioprospection of Gram-positive Bacteria Derived from a Mayan Sinkhole. MICROBIAL ECOLOGY 2024; 87:77. [PMID: 38806738 PMCID: PMC11133088 DOI: 10.1007/s00248-024-02392-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 05/17/2024] [Indexed: 05/30/2024]
Abstract
Water-filled sinkholes known locally as cenotes, found on the Yucatán Peninsula, have remarkable biodiversity. The primary objective of this study was to explore the biotechnological potential of Gram-positive cultivable bacteria obtained from sediment samples collected at the coastal cenote Pol-Ac in Yucatán, Mexico. Specifically, the investigation aimed to assess production of hydrolytic enzymes and antimicrobial compounds. 16 S rRNA gene sequencing led to the identification of 49 Gram-positive bacterial isolates belonging to the phyla Bacillota (n = 29) and Actinomycetota (n = 20) divided into the common genera Bacillus and Streptomyces, as well as the genera Virgibacillus, Halobacillus, Metabacillus, Solibacillus, Neobacillus, Rossellomorea, Nocardiopsis and Corynebacterium. With growth at 55ºC, 21 of the 49 strains were classified as moderately thermotolerant. All strains were classified as halotolerant and 24 were dependent on marine water for growth. Screening for six extracellular hydrolytic enzymes revealed gelatinase, amylase, lipase, cellulase, protease and chitinase activities in 93.9%, 67.3%, 63.3%, 59.2%, 59.2% and 38.8%, of isolated strains, respectively. The genes for polyketide synthases type I, were detected in 24 of the strains. Of 18 strains that achieved > 25% inhibition of growth in the bacterial pathogen Staphylococcus aureus ATCC 6538, 4 also inhibited growth in Escherichia coli ATCC 35,218. Isolates Streptomyces sp. NCA_378 and Bacillus sp. NCA_374 demonstrated 50-75% growth inhibition against at least one of the two pathogens tested, along with significant enzymatic activity across all six extracellular enzymes. This is the first comprehensive report on the biotechnological potential of Gram-positive bacteria isolated from sediments in the cenotes of the Yucatán Peninsula.
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Affiliation(s)
- Julian L Wissner
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Puerto de abrigo s/n, Sisal, Yucatán, 97356, México
| | - José Carlos Parada-Fabián
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Puerto de abrigo s/n, Sisal, Yucatán, 97356, México
| | - Norma Angélica Márquez-Velázquez
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Puerto de abrigo s/n, Sisal, Yucatán, 97356, México
| | - Wendy Escobedo-Hinojosa
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Puerto de abrigo s/n, Sisal, Yucatán, 97356, México
| | - Susana P Gaudêncio
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, 2819-516, Portugal
- Applied Molecular Biosciences Unit, Chemistry and Life Sciences Departments, NOVA Faculty of Sciences and Technology, UCIBIO, NOVA University of Lisbon, Lisbon, 2819-516, Portugal
| | - Alejandra Prieto-Davó
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Puerto de abrigo s/n, Sisal, Yucatán, 97356, México.
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Ben Abdallah M, Chamkha M, Karray F, Sayadi S. Microbial diversity in polyextreme salt flats and their potential applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:11371-11405. [PMID: 38180652 DOI: 10.1007/s11356-023-31644-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 12/17/2023] [Indexed: 01/06/2024]
Abstract
Recent geological, hydrochemical, and mineralogical studies performed on hypersaline salt flats have given insights into similar geo-morphologic features on Mars. These salt-encrusted depressions are widely spread across the Earth, where they are characterized by high salt concentrations, intense UV radiation, high evaporation, and low precipitation. Their surfaces are completely dry in summer; intermittent flooding occurs in winter turning them into transitory hypersaline lakes. Thanks to new approaches such as culture-dependent, culture-independent, and metagenomic-based methods, it is important to study microbial life under polyextreme conditions and understand what lives in these dynamic ecosystems and how they function. Regarding these particular features, new halophilic microorganisms have been isolated from some salt flats and identified as excellent producers of primary and secondary metabolites and granules such as halocins, enzymes, carotenoids, polyhydroxyalkanoates, and exopolysaccharides. Additionally, halophilic microorganisms are implemented in heavy metal bioremediation and hypersaline wastewater treatment. As a result, there is a growing interest in the distribution of halophilic microorganisms around the world that can be looked upon as good models to develop sustainable biotechnological processes for all fields. This review provides insights into diversity, ecology, metabolism, and genomics of halophiles in hypersaline salt flats worldwide as well as their potential uses in biotechnology.
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Affiliation(s)
- Manel Ben Abdallah
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia.
| | - Mohamed Chamkha
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia
| | - Fatma Karray
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713, Doha, Qatar
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Liu YH, Mohamad OAA, Gao L, Xie YG, Abdugheni R, Huang Y, Li L, Fang BZ, Li WJ. Sediment prokaryotic microbial community and potential biogeochemical cycle from saline lakes shaped by habitat. Microbiol Res 2023; 270:127342. [PMID: 36848700 DOI: 10.1016/j.micres.2023.127342] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/19/2023] [Accepted: 02/20/2023] [Indexed: 02/23/2023]
Abstract
The microbial diversity and ecological function in different saline lakes was reduced or disappeared as the influence of climate change and human activities even before they were known. However, reports about prokaryotic microbial of saline lakes from Xinjiang are very limited especially in large-scale investigations. In this study, a total of 6 saline lakes represented three different habitats, including hypersaline lake (HSL), arid saline lake (ASL), and light saltwater lake (LSL) were involved. The distribution pattern and potential functions of prokaryotes were investigated by using the cultivation-independent method of amplicon sequencing. The results showed that Proteobacteria was the predominant community and was widely distributed in all kinds of saline lakes, Desulfobacterota was the representative community in hypersaline lakes, Firmicutes and Acidobacteriota were mainly distributed in arid saline lake samples, and Chloroflexi was more abundant in light saltwater lakes. Specifically, the archaeal community was mainly distributed in the HSL and ASL samples, whereas it was very rare in the LSL lakes. The functional group showed that fermentation was the main metabolic process of microbes in all saline lakes and covered 8 phyla, including Actinobacteriota, Bacteroidota, Desulfobacterota, Firmicutes, Halanaerobiaeota, Proteobacteria, Spirochaetota, and Verrucomicrobiota. Among the 15 functional phyla, Proteobacteria was a distinctly important community in saline lakes, as it exhibited wide functions in the biogeochemical cycle. According to the correlation of environmental factors, SO42-, Na+, CO32-, and TN were significantly affected in the microbial community from saline lakes in this study. Overall, our study provided more detailed information about microbial community composition and distribution from three different habitats of saline lakes, especially the potential functions of carbon, nitrogen, and sulfur cycles, which provided new insight for understanding the complex microbiota adapt to the extreme environment and new perspectives on evaluating microbial contributions to degraded saline lakes under environmental change.
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Affiliation(s)
- Yong-Hong Liu
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China; Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830000 Urumqi, PR China
| | - Osama Abdalla Abdelshafy Mohamad
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China; Department of Environmental Protection, Faculty of Environmental Agricultural Sciences, Arish University, Al-Arish 45511, Egypt
| | - Lei Gao
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China
| | - Yuan-Guo Xie
- Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, PR China
| | - Rashidin Abdugheni
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China
| | - Yin Huang
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China
| | - Li Li
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China
| | - Bao-Zhu Fang
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China.
| | - Wen-Jun Li
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China; State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, PR China.
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Fahmy NM, El-Deeb B. Optimization, partial purification, and characterization of a novel high molecular weight alkaline protease produced by Halobacillus sp. HAL1 using fish wastes as a substrate. J Genet Eng Biotechnol 2023; 21:48. [PMID: 37121925 PMCID: PMC10149429 DOI: 10.1186/s43141-023-00509-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 04/20/2023] [Indexed: 05/02/2023]
Abstract
BACKGROUND Hydrolytic enzymes from halophilic microorganisms have a wide range of industrial applications. Herein, we report the isolation of Halobacillus sp. HAL1, a moderately halophilic bacterium that produces a novel high molecular weight extracellular alkaline protease when grown in fish processing wastes as a substrate. RESULTS Results showed that the isolated strain belonged to the genus Halobacillus, and it was designated as Halobacillus sp. HAL1 with the GenBank accession number OK001470. The strain secreted an extracellular alkaline protease, and the highest yield was obtained when it was grown in a medium with fish wastes substrate as the sole nutritional source (10 g/L) and incubated at 25 °C under shaking conditions. The enzyme was partially purified by Sephadex G-100 column chromatography. Zymographic analysis showed two casein degrading bands of about 190 and 250 KDa. The optimum enzyme activity was at a temperature of 50 °C at pH 8. The proteolytic activity was enhanced in the presence of metal ions (Ca2+, Mg2+, and Mn2+), surfactants (Tween 80, SDS, and Triton-X100), H2O2, and EDTA. CONCLUSION Our study indicates that Haobacillus sp. HAL1 is a moderately halophilic strain and secrets a novel high molecular wight alkaline protease that is suitable for detergent formulation.
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Affiliation(s)
- Nayer M Fahmy
- Marine Microbiology Laboratory, National Institute of Oceanography & Fisheries, Cairo, Egypt.
| | - Bahig El-Deeb
- Faculty of Science, Botany and Microbiology Department, Sohag University, Sohag, Egypt
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Hassani II, Quadri I, Yadav A, Bouchard S, Raoult D, Hacène H, Desnues C. Assessment of diversity of archaeal communities in Algerian chott. Extremophiles 2023; 27:2. [PMID: 36469177 DOI: 10.1007/s00792-022-01287-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 11/23/2022] [Indexed: 12/12/2022]
Abstract
Halophilic archaea are the dominant type of microorganisms in hypersaline environments. The diversity of halophilic archaea in Zehrez-Chergui (Saharian chott) was analyzed and compared by both analysis of a library of PCR amplified 16S rRNA genes and by cultivation approach. This work, represents the first of its type in Algeria. A total cell count was estimated at 3.8 × 103 CFU/g. The morphological, biochemical, and physiological characterizations of 45 distinct strains, suggests that all of them might be members of the class Halobacteria. Among stains, 23 were characterized phylogenetically and are related to 6 genera of halophilic archaea.The dominance of the genus Halopiger, has not been reported yet in other hypersaline environments. The 100 clones obtained by the molecular approach, were sequenced, and analyzed. The ribosomal library of 61 OTUs showed that the archaeal diversity included uncultured haloarcheon, Halomicrobium, Natronomonas, Halomicroarcula, Halapricum, Haloarcula, Halosimplex, Haloterrigena, Halolamina, Halorubellus, Halorussus and Halonotius. The results of rarefaction analysis indicated that the analysis of an increasing number of clones would have revealed additional diversity. Surprisingly, no halophilic archaea were not shared between the two approaches. Combining both types of methods was considered the best approach to acquire better information on the characteristics of soil halophilic archaea.
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Affiliation(s)
- Imene Ikram Hassani
- Laboratoire de Biologie Cellulaire et Moléculaire, Faculté de Biologie, USTHB Université, Bab Ezzouar, Algeria.
| | - Inès Quadri
- Laboratoire de Biologie Cellulaire et Moléculaire, Faculté de Biologie, USTHB Université, Bab Ezzouar, Algeria
| | - Archana Yadav
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Sonia Bouchard
- Faculté de Médecine, Aix-Marseille Université, URMITE, UM63, CNRS7278, IRD 198, Inserm U1095, 27 Boulevard Jean Moulin, 13385, Marseille, France
| | - Didier Raoult
- Faculté de Médecine, Aix-Marseille Université, URMITE, UM63, CNRS7278, IRD 198, Inserm U1095, 27 Boulevard Jean Moulin, 13385, Marseille, France
| | - Hocine Hacène
- Laboratoire de Biologie Cellulaire et Moléculaire, Faculté de Biologie, USTHB Université, Bab Ezzouar, Algeria
| | - Christelle Desnues
- Faculté de Médecine, Aix-Marseille Université, URMITE, UM63, CNRS7278, IRD 198, Inserm U1095, 27 Boulevard Jean Moulin, 13385, Marseille, France
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Moopantakath J, Imchen M, Anju VT, Busi S, Dyavaiah M, Martínez-Espinosa RM, Kumavath R. Bioactive molecules from haloarchaea: Scope and prospects for industrial and therapeutic applications. Front Microbiol 2023; 14:1113540. [PMID: 37065149 PMCID: PMC10102575 DOI: 10.3389/fmicb.2023.1113540] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/14/2023] [Indexed: 04/03/2023] Open
Abstract
Marine environments and salty inland ecosystems encompass various environmental conditions, such as extremes of temperature, salinity, pH, pressure, altitude, dry conditions, and nutrient scarcity. The extremely halophilic archaea (also called haloarchaea) are a group of microorganisms requiring high salt concentrations (2–6 M NaCl) for optimal growth. Haloarchaea have different metabolic adaptations to withstand these extreme conditions. Among the adaptations, several vesicles, granules, primary and secondary metabolites are produced that are highly significant in biotechnology, such as carotenoids, halocins, enzymes, and granules of polyhydroxyalkanoates (PHAs). Among halophilic enzymes, reductases play a significant role in the textile industry and the degradation of hydrocarbon compounds. Enzymes like dehydrogenases, glycosyl hydrolases, lipases, esterases, and proteases can also be used in several industrial procedures. More recently, several studies stated that carotenoids, gas vacuoles, and liposomes produced by haloarchaea have specific applications in medicine and pharmacy. Additionally, the production of biodegradable and biocompatible polymers by haloarchaea to store carbon makes them potent candidates to be used as cell factories in the industrial production of bioplastics. Furthermore, some haloarchaeal species can synthesize nanoparticles during heavy metal detoxification, thus shedding light on a new approach to producing nanoparticles on a large scale. Recent studies also highlight that exopolysaccharides from haloarchaea can bind the SARS-CoV-2 spike protein. This review explores the potential of haloarchaea in the industry and biotechnology as cellular factories to upscale the production of diverse bioactive compounds.
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Affiliation(s)
- Jamseel Moopantakath
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Kerala, India
| | - Madangchanok Imchen
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - V. T. Anju
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Siddhardha Busi
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Madhu Dyavaiah
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Rosa María Martínez-Espinosa
- Biochemistry, Molecular Biology, Edaphology and Agricultural Chemistry Department, Faculty of Sciences, University of Alicante, Alicante, Spain
- Multidisciplinary Institute for Environmental Studies “Ramón Margalef”, University of Alicante, Alicante, Spain
- Rosa María Martínez-Espinosa,
| | - Ranjith Kumavath
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Kerala, India
- Department of Biotechnology, School of Life Sciences, Pondicherry University, Puducherry, India
- *Correspondence: Ranjith Kumavath, ,
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Baati H, Siala M, Azri C, Ammar E, Trigui M. Hydrolytic enzyme screening and carotenoid production evaluation of halophilic archaea isolated from highly heavy metal-enriched solar saltern sediments. Braz J Microbiol 2022; 53:1893-1906. [PMID: 36280648 PMCID: PMC9679124 DOI: 10.1007/s42770-022-00855-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 10/14/2022] [Indexed: 01/13/2023] Open
Abstract
This paper aimed to screen the enzymatic activities and evaluate the carotenoid production level of twenty-two halophilic archaea isolated from Sfax solar saltern sediments. The molecular identification performed by sequencing the 16S rRNA genes showed that all strains have a high similarity degree (99.7-100%) with Halobacterium salinarum NRC-1. The strains were screened for the presence of eight hydrolase activities using agar plate-based assays. The most detected enzyme was gelatinase (77.27% of total strains), followed by protease (63.63%) and amylase activities (50%). The carotenoid production yields of the strains ranged between 2.027 and 14.880 mg/l. The UV-Visible spectroscopy of pigments revealed that it was a bacterioruberin type. When evaluated and compared to the standard β-carotene, the antioxidant capacities of these pigments showed a scavenging activity of more than 75% at a concentration of 5 μg/ml for three strains (AS16, AS17, and AS18). Then a sequence of one-step optimization processes was performed, using the one-factor-at-a-time approach, to define the optimum conditions for growth and carotenoid production of the highest carotenoid producing strain (AS17). Different environmental factors and nutritional conditions were tested. Variations in these factors were found to deeply influence growth and carotenoid production. A maximum carotenoid production (16.490 mg/l), higher than that of the control (14.880 mg/l), was observed at 37 °C, pH 7, 250 g/l of salinity, with 80% air phase in the flask at 110 rpm, in presence of light and in culture media containing (g/l) 10, yeast extract; 7.5, casamino acid; 20, MgSO4; 4, KCl; and 3, trisodium citrate.
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Affiliation(s)
- Houda Baati
- Research Laboratory of Environmental Sciences and Sustainable Development "LASED", University of Sfax, LR18ES32, Sfax, Tunisia.
| | - Mariem Siala
- Research Laboratory of Environmental Sciences and Sustainable Development "LASED", University of Sfax, LR18ES32, Sfax, Tunisia
| | - Chafai Azri
- Research Laboratory of Environmental Sciences and Sustainable Development "LASED", University of Sfax, LR18ES32, Sfax, Tunisia
| | - Emna Ammar
- Research Laboratory of Environmental Sciences and Sustainable Development "LASED", University of Sfax, LR18ES32, Sfax, Tunisia
| | - Mohamed Trigui
- Research Laboratory of Environmental Sciences and Sustainable Development "LASED", University of Sfax, LR18ES32, Sfax, Tunisia
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Amiour S, Chekroud K, Font-Verdera F, Anver S, Liébana R, Hafdi O, Viver T. Overview of the Diversity of Extremely Saline Soils from a Semi-Arid Region Using 16S rRNA Gene Sequencing: A Case Study of the Sebkhas in Algerian High Plateaus. Microbiology (Reading) 2022. [DOI: 10.1134/s0026261722100472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Phulpoto IA, Jakhrani BA, Panhyar AA, Phulpoto AH, Shaikh SH, Channa N, Kanhar NA, Qazi MA. Temperate hyper-saline ecosystems induce spatial distribution and halo-thermotolerance potential in indigenous cultivable bacterial community. COMMUNITY ECOL 2022. [DOI: 10.1007/s42974-022-00111-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Menasria T, Monteoliva-Sánchez M, Benhadj M, Benammar L, Boukoucha M, Aguilera M. Unraveling the enzymatic and antibacterial potential of rare halophilic actinomycetes from Algerian hypersaline wetland ecosystems. J Basic Microbiol 2022; 62:1202-1215. [PMID: 35945171 DOI: 10.1002/jobm.202200085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 06/18/2022] [Accepted: 07/10/2022] [Indexed: 11/07/2022]
Abstract
The study aimed to isolate rare halophilic actinomycetes from hypersaline soils of Algerian inland Wetland Ecosystems "Sebkhas-Chotts" located in arid and hot hyperarid lands with international importance under the Ramsar Convention and to explore their enzyme-producing and antibacterial abilities. The halophilic actinomycetes were selectively isolated using agar-rich media supplemented with 5, 10, and 15% (W/V) of total salts. Thirty-one isolates were obtained and 16S rRNA gene sequencing analysis revealed the presence of members affiliated to rare halophilic actinobacterial genera (Actinopolyspora and Nocardiopsis) accounting for 74.19% (23 isolates out of 31) and 25.8% (8 isolates), respectively. Both phylotypes are alkalitolerant and halophilic thermotolerant actinomycetes displaying significant hydrolytic activities relative to (amylase, asparaginase, cellulase, esterase, glutaminase, inulinase, protease, pectinase, xylanase), and over 96% of tested isolates exhibited all common enzymes, mainly active at 10% of growing salt. In addition, high antibacterial activity was observed against Bacillus cereus, Bacillus subtilis, Micrococcus luteus, and Staphylococcus aureus. The findings showed that saline wetlands ecosystems represent a rich reservoir for the isolation of significant rare halophilic actinomycetes with potential adaptive features and valuable sources for novel bioactive metabolites and biocatalysts of biotechnological interest.
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Affiliation(s)
- Taha Menasria
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, University of Larbi Tebessi, Tebessa, Algeria.,Department of Microbiology, Faculty of Pharmacy, University of Granada, Granada, Spain
| | | | - Mabrouka Benhadj
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, University of Larbi Tebessi, Tebessa, Algeria
| | - Leyla Benammar
- Department of Microbiology and Biochemistry, Faculty of Natural and Life Sciences University of Batna, Batna, Algeria
| | - Mourad Boukoucha
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, University of Larbi Tebessi, Tebessa, Algeria
| | - Margarita Aguilera
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Granada, Spain
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12
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The Susceptibility to Biodegradation of Some Consolidants Used in the Restoration of Mural Paintings. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12147229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study evaluated both the possible fungal metabolites involved in the degradation of the commercial consolidant known as Paraloid® B72 and the national artisanal consolidant named transparent dispersion of casein and the deteriorative potential of melanised fungi. Fungi were found to have the capacity to produce organic acids, proteases and esterases when they grow on consolidants, which can be used as nutrients. Mycelia produced by melanised fungi affected the appearance, as well as the integrity, of consolidants applied on painted experimental models and fragments of frescoes. In treatment trials with biocides (Biotin R®, Biotin T® and Preventol® RI 80), the morphology of the consolidants, as well as the vitality of the fungi, were assessed 30 days after the inoculation with melanic fungi. Direct observation, optical microscopy, colourimetry and microbiological analysis highlighted the degradation of the consolidants by fungi and their acquired resistance after biocidal treatments. Biotin R® applied by brushing on the surface of the consolidants proved to be the most effective treatment, followed by Biotin T®. Considering the overall results for both Paraloid® B72 and transparent dispersion of casein, use of Biotin R® applied by brushing is recommended for preventive conservation.
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13
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Ruginescu R, Enache M, Popescu O, Gomoiu I, Cojoc R, Batrinescu-Moteau C, Maria G, Dumbravician M, Neagu S. Characterization of Some Salt-Tolerant Bacterial Hydrolases with Potential Utility in Cultural Heritage Bio-Cleaning. Microorganisms 2022; 10:microorganisms10030644. [PMID: 35336219 PMCID: PMC8949325 DOI: 10.3390/microorganisms10030644] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/11/2022] [Accepted: 03/15/2022] [Indexed: 02/04/2023] Open
Abstract
Salt-tolerant enzymes produced by halophilic and halotolerant microorganisms have been proposed to be used in various applications that involve high saline conditions. Considering their biotechnological significance and the current need for more efficient producers of such catalysts, the present study aimed to evaluate the extracellular proteolytic, esterolytic, cellulolytic and xylanolytic activities of some halotolerant strains, and to characterize their functional parameters. A total of 21 bacterial and fungal strains belonging to the genera Bacillus, Virgibacillus, Salinivibrio, Salinicoccus, Psychrobacter, Nocardiopsis, Penicillium, Aspergillus, and Emericellopsis were assayed by quantitative methods. Among them, the members of the Bacillus genus exhibited the highest catalytic activities. The exoenzymes produced by three selected Bacillus strains were active over wide ranges of salinity, temperature and pH. Proteases were active at 20–80 °C, pH 6–10, and 0–1 M NaCl, while esterases showed good catalytic activities at 20–80 °C, pH 7.5–10, and 0–4 M NaCl. Cellulases and xylanases were active at 20–80 °C, pH 5–10, and 0–5 M NaCl. Due to such properties, these hydrolases could be used in a newly proposed application, namely to clean aged consolidants and organic deposits accumulated over time from the surfaces of salt-loaded wall paintings.
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Affiliation(s)
- Robert Ruginescu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, 60031 Bucharest, Romania; (M.E.); (O.P.); (I.G.); (R.C.); (C.B.-M.); (G.M.); (S.N.)
- Correspondence:
| | - Madalin Enache
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, 60031 Bucharest, Romania; (M.E.); (O.P.); (I.G.); (R.C.); (C.B.-M.); (G.M.); (S.N.)
| | - Octavian Popescu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, 60031 Bucharest, Romania; (M.E.); (O.P.); (I.G.); (R.C.); (C.B.-M.); (G.M.); (S.N.)
- Molecular Biology Center, Institute of Interdisciplinary Research in Bio-Nano-Sciences, Babes-Bolyai-University, 42 Treboniu Laurian Str., 400271 Cluj-Napoca, Romania
| | - Ioana Gomoiu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, 60031 Bucharest, Romania; (M.E.); (O.P.); (I.G.); (R.C.); (C.B.-M.); (G.M.); (S.N.)
| | - Roxana Cojoc
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, 60031 Bucharest, Romania; (M.E.); (O.P.); (I.G.); (R.C.); (C.B.-M.); (G.M.); (S.N.)
| | - Costin Batrinescu-Moteau
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, 60031 Bucharest, Romania; (M.E.); (O.P.); (I.G.); (R.C.); (C.B.-M.); (G.M.); (S.N.)
| | - Gabriel Maria
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, 60031 Bucharest, Romania; (M.E.); (O.P.); (I.G.); (R.C.); (C.B.-M.); (G.M.); (S.N.)
| | - Maria Dumbravician
- Department of Conservation and Restoration, Faculty of Art History, Bucharest National University of Arts, 19 General Constantin Budișteanu, 010773 Bucharest, Romania;
| | - Simona Neagu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, 60031 Bucharest, Romania; (M.E.); (O.P.); (I.G.); (R.C.); (C.B.-M.); (G.M.); (S.N.)
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14
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Tatta ER, Imchen M, Moopantakath J, Kumavath R. Bioprospecting of microbial enzymes: current trends in industry and healthcare. Appl Microbiol Biotechnol 2022; 106:1813-1835. [PMID: 35254498 DOI: 10.1007/s00253-022-11859-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 02/15/2022] [Accepted: 02/26/2022] [Indexed: 12/13/2022]
Abstract
Microbial enzymes have an indispensable role in producing foods, pharmaceuticals, and other commercial goods. Many novel enzymes have been reported from all domains of life, such as plants, microbes, and animals. Nonetheless, industrially desirable enzymes of microbial origin are limited. This review article discusses the classifications, applications, sources, and challenges of most demanded industrial enzymes such as pectinases, cellulase, lipase, and protease. In addition, the production of novel enzymes through protein engineering technologies such as directed evolution, rational, and de novo design, for the improvement of existing industrial enzymes is also explored. We have also explored the role of metagenomics, nanotechnology, OMICs, and machine learning approaches in the bioprospecting of novel enzymes. Overall, this review covers the basics of biocatalysts in industrial and healthcare applications and provides an overview of existing microbial enzyme optimization tools. KEY POINTS: • Microbial bioactive molecules are vital for therapeutic and industrial applications. • High-throughput OMIC is the most proficient approach for novel enzyme discovery. • Comprehensive databases and efficient machine learning models are the need of the hour to fast forward de novo enzyme design and discovery.
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Affiliation(s)
- Eswar Rao Tatta
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (PO.), Kasaragod, Kerala, 671320, India
| | - Madangchanok Imchen
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (PO.), Kasaragod, Kerala, 671320, India
| | - Jamseel Moopantakath
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (PO.), Kasaragod, Kerala, 671320, India
| | - Ranjith Kumavath
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (PO.), Kasaragod, Kerala, 671320, India.
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15
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Mehda S, Muñoz-Martín MÁ, Oustani M, Hamdi-Aïssa B, Perona E, Mateo P. Lithic cyanobacterial communities in the polyextreme Sahara Desert: implications for the search for the limits of life. Environ Microbiol 2021; 24:451-474. [PMID: 34837297 DOI: 10.1111/1462-2920.15850] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/25/2021] [Accepted: 11/12/2021] [Indexed: 11/29/2022]
Abstract
The hyperarid Sahara Desert presents extreme and persistent dry conditions with a limited number of hours during which the moisture availability, temperature and light allow phototrophic growth. Some cyanobacteria can live in these hostile conditions by seeking refuge under (hypolithic) or inside (endolithic) rocks, by colonizing porous spaces (cryptoendoliths) or fissures in stones (chasmoendoliths). Chroococcidiopsis spp. have been reported as the dominant or even the only phototrophs in these hot desert lithic communities. However, the results of this study reveal the high diversity of and variability in cyanobacteria among the sampled habitats in the Sahara Desert. The chasmoendolithic samples presented high coccoid cyanobacteria abundances, although the dominant cyanobacteria were distinct among different locations. A high predominance of a newly described cyanobacterium, Pseudoacaryochloris sahariense, was found in hard, compact, and more opaque stones with cryptoendolithic colonization. On the other hand, the hypolithic samples were dominated by filamentous, non-heterocystous cyanobacteria. Thermophysiological bioassays confirmed desiccation and extreme temperature tolerance as drivers in the cyanobacterial community composition of these lithic niches. The results of the present study provide key factors for understanding life strategies under polyextreme environmental conditions. The isolated strains, especially the newly described cyanobacterium P. sahariense, might represent suitable microorganisms in astrobiology studies aimed at investigating the limits of life.
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Affiliation(s)
- Smail Mehda
- Departamento de Biología. Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain.,Laboratory of Biogeochemistry of Desert Areas, University of Ouargla, Ouargla, 30000, Algeria.,Faculty of Life and Natural Sciences, Department of Agronomy, University of El Oued, El Oued, 39000, Algeria
| | - M Ángeles Muñoz-Martín
- Departamento de Biología. Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Mabrouka Oustani
- Laboratory of Saharan Bio-Resources: Preservation and Development, University of Ouargla, Ouargla, 30000, Algeria
| | - Baelhadj Hamdi-Aïssa
- Laboratory of Biogeochemistry of Desert Areas, University of Ouargla, Ouargla, 30000, Algeria
| | - Elvira Perona
- Departamento de Biología. Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Pilar Mateo
- Departamento de Biología. Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
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16
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Verma D. Extremophilic Prokaryotic Endoxylanases: Diversity, Applicability, and Molecular Insights. Front Microbiol 2021; 12:728475. [PMID: 34566933 PMCID: PMC8458939 DOI: 10.3389/fmicb.2021.728475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/06/2021] [Indexed: 11/13/2022] Open
Abstract
Extremophilic endoxylanases grabbed attention in recent years due to their applicability under harsh conditions of several industrial processes. Thermophilic, alkaliphilic, and acidophilic endoxylanases found their employability in bio-bleaching of paper pulp, bioconversion of lignocellulosic biomass into xylooligosaccharides, bioethanol production, and improving the nutritious value of bread and other bakery products. Xylanases obtained from extremophilic bacteria and archaea are considered better than fungal sources for several reasons. For example, enzymatic activity under broad pH and temperature range, low molecular weight, cellulase-free activity, and longer stability under extreme conditions of prokaryotic derived xylanases make them a good choice. In addition, a short life span, easy cultivation/harvesting methods, higher yield, and rapid DNA manipulations of bacterial and archaeal cells further reduces the overall cost of the product. This review focuses on the diversity of prokaryotic endoxylanases, their characteristics, and their functional attributes. Besides, the molecular mechanisms of their extreme behavior have also been presented here.
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Affiliation(s)
- Digvijay Verma
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, India
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17
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Torres-Sánchez A, Pardo-Cacho J, López-Moreno A, Ruiz-Moreno Á, Cerk K, Aguilera M. Antimicrobial Effects of Potential Probiotics of Bacillus spp. Isolated from Human Microbiota: In Vitro and In Silico Methods. Microorganisms 2021; 9:1615. [PMID: 34442694 PMCID: PMC8399655 DOI: 10.3390/microorganisms9081615] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/26/2021] [Accepted: 07/26/2021] [Indexed: 12/14/2022] Open
Abstract
The variable taxa components of human gut microbiota seem to have an enormous biotechnological potential that is not yet well explored. To investigate the usefulness and applications of its biocompounds and/or bioactive substances would have a dual impact, allowing us to better understand the ecology of these microbiota consortia and to obtain resources for extended uses. Our research team has obtained a catalogue of isolated and typified strains from microbiota showing resistance to dietary contaminants and obesogens. Special attention was paid to cultivable Bacillus species as potential next-generation probiotics (NGP) together with their antimicrobial production and ecological impacts. The objective of the present work focused on bioinformatic genome data mining and phenotypic analyses for antimicrobial production. In silico methods were applied over the phylogenetically closest type strain genomes of the microbiota Bacillus spp. isolates and standardized antimicrobial production procedures were used. The main results showed partial and complete gene identification and presence of polyketide (PK) clusters on the whole genome sequences (WGS) analysed. Moreover, specific antimicrobial effects against B. cereus, B. circulans, Staphylococcus aureus, Streptococcus pyogenes, Escherichia coli, Serratia marcescens, Klebsiella spp., Pseudomonas spp., and Salmonella spp. confirmed their capacity of antimicrobial production. In conclusion, Bacillus strains isolated from human gut microbiota and taxonomic group, resistant to Bisphenols as xenobiotics type endocrine disruptors, showed parallel PKS biosynthesis and a phenotypic antimicrobial effect. This could modulate the composition of human gut microbiota and therefore its functionalities, becoming a predominant group when high contaminant exposure conditions are present.
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Affiliation(s)
- Alfonso Torres-Sánchez
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, 18071 Granada, Spain; (A.T.-S.); (J.P.-C.); (Á.R.-M.); (K.C.)
- Institute of Nutrition and Food Technology “José Mataix”, CIBM, University of Granada, Armilla, 18016 Granada, Spain
| | - Jesús Pardo-Cacho
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, 18071 Granada, Spain; (A.T.-S.); (J.P.-C.); (Á.R.-M.); (K.C.)
| | - Ana López-Moreno
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, 18071 Granada, Spain; (A.T.-S.); (J.P.-C.); (Á.R.-M.); (K.C.)
- Institute of Nutrition and Food Technology “José Mataix”, CIBM, University of Granada, Armilla, 18016 Granada, Spain
- Instituto de Investigación Biosanitaria ibs (IBS), 18012 Granada, Spain
| | - Ángel Ruiz-Moreno
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, 18071 Granada, Spain; (A.T.-S.); (J.P.-C.); (Á.R.-M.); (K.C.)
- Institute of Nutrition and Food Technology “José Mataix”, CIBM, University of Granada, Armilla, 18016 Granada, Spain
| | - Klara Cerk
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, 18071 Granada, Spain; (A.T.-S.); (J.P.-C.); (Á.R.-M.); (K.C.)
| | - Margarita Aguilera
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, 18071 Granada, Spain; (A.T.-S.); (J.P.-C.); (Á.R.-M.); (K.C.)
- Institute of Nutrition and Food Technology “José Mataix”, CIBM, University of Granada, Armilla, 18016 Granada, Spain
- Instituto de Investigación Biosanitaria ibs (IBS), 18012 Granada, Spain
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18
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Representative Bacillus sp. AM1 from Gut Microbiota Harbor Versatile Molecular Pathways for Bisphenol A Biodegradation. Int J Mol Sci 2021; 22:ijms22094952. [PMID: 34066922 PMCID: PMC8125285 DOI: 10.3390/ijms22094952] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 02/24/2021] [Accepted: 02/24/2021] [Indexed: 12/19/2022] Open
Abstract
Human gut microbiota harbors numerous microbial species with molecular enzymatic potential that impact on the eubiosis/dysbiosis and health/disease balances. Microbiota species isolation and description of their specific molecular features remain largely unexplored. In the present study, we focused on the cultivation and selection of species able to tolerate or biodegrade the endocrine disruptor bisphenol A (BPA), a xenobiotic extensively found in food plastic containers. Chemical xenobiotic addition methods for the directed isolation, culturing, Whole Genome Sequencing (WGS), phylogenomic identification, and specific gene-encoding searches have been applied to isolate microorganisms, assess their BPA metabolization potential, and describe encoded catabolic pathways. BPA-tolerant strains were isolated from 30% of infant fecal microbial culture libraries analyzed. Most isolated strains were phylogenetically related to the operational taxonomic group Bacillus amyloliquefaciens spp. Importantly, WGS analysis of microbial representative strain, Bacillus sp. AM1 identified the four complete molecular pathways involved on BPA degradation indicating its versatility and high potential to degrade BPA. Pathways for Exopolysaccharide (EPS) and Polyhydroxyalkanates (PHA) biopolymer synthesis were also identified and phenotypically confirmed by transmission electronic microscopy (TEM). These microbial biopolymers could generally contribute to capture and/or deposit xenobiotics.
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19
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Kasirajan L, Maupin-Furlow JA. Halophilic archaea and their potential to generate renewable fuels and chemicals. Biotechnol Bioeng 2020; 118:1066-1090. [PMID: 33241850 DOI: 10.1002/bit.27639] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 10/27/2020] [Accepted: 11/17/2020] [Indexed: 12/16/2022]
Abstract
Lignocellulosic biofuels and chemicals have great potential to reduce our dependence on fossil fuels and mitigate air pollution by cutting down on greenhouse gas emissions. Chemical, thermal, and enzymatic processes are used to release the sugars from the lignocellulosic biomass for conversion to biofuels. These processes often operate at extreme pH conditions, high salt concentrations, and/or high temperature. These harsh treatments add to the cost of the biofuels, as most known biocatalysts do not operate under these conditions. To increase the economic feasibility of biofuel production, microorganisms that thrive in extreme conditions are considered as ideal resources to generate biofuels and value-added products. Halophilic archaea (haloarchaea) are isolated from hypersaline ecosystems with high salt concentrations approaching saturation (1.5-5 M salt concentration) including environments with extremes in pH and/or temperature. The unique traits of haloarchaea and their enzymes that enable them to sustain catalytic activity in these environments make them attractive resources for use in bioconversion processes that must occur across a wide range of industrial conditions. Biocatalysts (enzymes) derived from haloarchaea occupy a unique niche in organic solvent, salt-based, and detergent industries. This review focuses on the use of haloarchaea and their enzymes to develop and improve biofuel production. The review also highlights how haloarchaea produce value-added products, such as antibiotics, carotenoids, and bioplastic precursors, and can do so using feedstocks considered "too salty" for most microbial processes including wastes from the olive-mill, shell fish, and biodiesel industries.
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Affiliation(s)
- Lakshmi Kasirajan
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, USA.,Division of Crop Improvement, ICAR Sugarcane Breeding Institute, Coimbatore, India
| | - Julie A Maupin-Furlow
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, USA.,Genetics Institute, University of Florida, Gainesville, Florida, USA
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20
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Ruginescu R, Gomoiu I, Popescu O, Cojoc R, Neagu S, Lucaci I, Batrinescu-Moteau C, Enache M. Bioprospecting for Novel Halophilic and Halotolerant Sources of Hydrolytic Enzymes in Brackish, Saline and Hypersaline Lakes of Romania. Microorganisms 2020; 8:microorganisms8121903. [PMID: 33266166 PMCID: PMC7760675 DOI: 10.3390/microorganisms8121903] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/25/2020] [Accepted: 11/30/2020] [Indexed: 12/31/2022] Open
Abstract
Halophilic and halotolerant microorganisms represent promising sources of salt-tolerant enzymes that could be used in various biotechnological processes where high salt concentrations would otherwise inhibit enzymatic transformations. Considering the current need for more efficient biocatalysts, the present study aimed to explore the microbial diversity of five under- or uninvestigated salty lakes in Romania for novel sources of hydrolytic enzymes. Bacteria, archaea and fungi were obtained by culture-based approaches and screened for the production of six hydrolases (protease, lipase, amylase, cellulase, xylanase and pectinase) using agar plate-based assays. Moreover, the phylogeny of bacterial and archaeal isolates was studied through molecular methods. From a total of 244 microbial isolates, 182 (74.6%) were represented by bacteria, 22 (9%) by archaea, and 40 (16.4%) by fungi. While most bacteria synthesized protease and lipase, the most frequent hydrolase produced by fungi was pectinase. The archaeal isolates had limited hydrolytic activity, being able to produce only amylase and cellulase. Among the taxonomically identified isolates, the best hydrolytic activities were observed in halotolerant bacteria belonging to the genus Bacillus and in extremely halophilic archaea of the genera Haloterrigena and Halostagnicola. Therefore, the present study highlights that the investigated lakes harbor various promising species of microorganisms able to produce industrially valuable enzymes.
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Affiliation(s)
- Robert Ruginescu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, P.O. Box 56-53, 060031 Bucharest, Romania; (I.G.); (O.P.); (R.C.); (S.N.); (I.L.); (C.B.-M.); (M.E.)
- Correspondence:
| | - Ioana Gomoiu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, P.O. Box 56-53, 060031 Bucharest, Romania; (I.G.); (O.P.); (R.C.); (S.N.); (I.L.); (C.B.-M.); (M.E.)
| | - Octavian Popescu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, P.O. Box 56-53, 060031 Bucharest, Romania; (I.G.); (O.P.); (R.C.); (S.N.); (I.L.); (C.B.-M.); (M.E.)
- Molecular Biology Center, Institute of Interdisciplinary Research in Bio-Nano-Sciences, Babes-Bolyai-University, 42 Treboniu Laurian St., 400271 Cluj-Napoca, Romania
| | - Roxana Cojoc
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, P.O. Box 56-53, 060031 Bucharest, Romania; (I.G.); (O.P.); (R.C.); (S.N.); (I.L.); (C.B.-M.); (M.E.)
| | - Simona Neagu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, P.O. Box 56-53, 060031 Bucharest, Romania; (I.G.); (O.P.); (R.C.); (S.N.); (I.L.); (C.B.-M.); (M.E.)
| | - Ioana Lucaci
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, P.O. Box 56-53, 060031 Bucharest, Romania; (I.G.); (O.P.); (R.C.); (S.N.); (I.L.); (C.B.-M.); (M.E.)
| | - Costin Batrinescu-Moteau
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, P.O. Box 56-53, 060031 Bucharest, Romania; (I.G.); (O.P.); (R.C.); (S.N.); (I.L.); (C.B.-M.); (M.E.)
| | - Madalin Enache
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, P.O. Box 56-53, 060031 Bucharest, Romania; (I.G.); (O.P.); (R.C.); (S.N.); (I.L.); (C.B.-M.); (M.E.)
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21
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González V, Vargas-Straube MJ, Beys-da-Silva WO, Santi L, Valencia P, Beltrametti F, Cámara B. Enzyme Bioprospection of Marine-Derived Actinobacteria from the Chilean Coast and New Insight in the Mechanism of Keratin Degradation in Streptomyces sp. G11C. Mar Drugs 2020; 18:E537. [PMID: 33126528 PMCID: PMC7693968 DOI: 10.3390/md18110537] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/13/2020] [Accepted: 10/17/2020] [Indexed: 01/10/2023] Open
Abstract
Marine actinobacteria are viewed as a promising source of enzymes with potential technological applications. They contribute to the turnover of complex biopolymers, such as pectin, lignocellulose, chitin, and keratin, being able to secrete a wide variety of extracellular enzymes. Among these, keratinases are a valuable alternative for recycling keratin-rich waste, which is generated in large quantities by the poultry industry. In this work, we explored the biocatalytic potential of 75 marine-derived actinobacterial strains, focusing mainly on the search for keratinases. A major part of the strains secreted industrially important enzymes, such as proteases, lipases, cellulases, amylases, and keratinases. Among these, we identified two streptomycete strains that presented great potential for recycling keratin wastes-Streptomyces sp. CHA1 and Streptomyces sp. G11C. Substrate concentration, incubation temperature, and, to a lesser extent, inoculum size were found to be important parameters that influenced the production of keratinolytic enzymes in both strains. In addition, proteomic analysis of culture broths from Streptomyces sp. G11C on turkey feathers showed a high abundance and diversity of peptidases, belonging mainly to the serine and metallo-superfamilies. Two proteases from families S08 and M06 were highly expressed. These results contributed to elucidate the mechanism of keratin degradation mediated by streptomycetes.
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Affiliation(s)
- Valentina González
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Departamento de Química y Centro de Biotecnología Daniel Alkalay Lowitt, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile; (V.G.); (M.J.V.-S.)
| | - María José Vargas-Straube
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Departamento de Química y Centro de Biotecnología Daniel Alkalay Lowitt, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile; (V.G.); (M.J.V.-S.)
| | - Walter O. Beys-da-Silva
- Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-000, Brazil; (W.O.B.-d.-S.); (L.S.)
| | - Lucélia Santi
- Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-000, Brazil; (W.O.B.-d.-S.); (L.S.)
| | - Pedro Valencia
- Laboratorio de Biocatálisis y Procesamiento de Alimentos, Departamento de Ingeniería Química y Ambiental, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile;
| | | | - Beatriz Cámara
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Departamento de Química y Centro de Biotecnología Daniel Alkalay Lowitt, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile; (V.G.); (M.J.V.-S.)
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Benammar L, İnan Bektaş K, Menasria T, Beldüz AO, Güler HI, Bedaida IK, Gonzalez JM, Ayachi A. Diversity and enzymatic potential of thermophilic bacteria associated with terrestrial hot springs in Algeria. Braz J Microbiol 2020; 51:1987-2007. [PMID: 32959204 DOI: 10.1007/s42770-020-00376-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 09/03/2020] [Indexed: 11/30/2022] Open
Abstract
This study aims to determine the diversity of culturable thermophilic bacteria isolated from eight terrestrial hot springs in Northeastern of Algeria using the conventional methods, SDS-PAGE fingerprinting of whole-cell proteins and 16S rRNA gene sequencing. In addition, their hydrolytic enzyme activities were also investigated. A total of 293 strains were isolated from the hot springs' water and sediment using different culture media. Overall, five distinct bacterial groups were characterized by whole-cell protein pattern analysis. Based on the 16S rRNA gene sequencing of 100 selected strains, the isolates were assigned to the following three major phyla: Firmicutes (93%), Deinococcus-Thermus (5%), and Actinobacteria (2%), which included 27 distinct species belonging to 12 different phylotypes, Aeribacillus, Aneurinibacillus, Anoxybacillus, Bacillus, Brevibacillus, Geobacillus, Laceyella, Meiothermus, Saccharomonospora, Thermoactinomyces, Thermobifida, and Thermus. The screening for nine extracellular enzymes showed that 65.87% of the isolates presented at least five types of enzyme activities, and 6.48% of strains combined all tested enzymes (amylase, cellulase, pectinase, esculinase, protease, gelatinase, lipase, lecithinase, and nuclease). It was found that Bacillus, Anoxybacillus, Aeribacillus, and Aneurinibacillus were the genera showing the highest activities. Likewise, the study showed an abundant and diverse thermophilic community with novel taxa presenting a promising source of thermozymes with important biotechnological applications. This study showed that a combined identification method using SDS-PAGE profiles of whole-cell proteins and subsequent 16S rRNA gene sequence analysis could successfully differentiate thermophilic bacteria from Algerian hot springs.
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Affiliation(s)
- L Benammar
- Department of Microbiology and Biochemistry, Faculty of Natural and Life Sciences, University of Batna 2, 05078, Batna, Algeria.
- Molecular Biology Research Laboratory, Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey.
- Bacteriology Laboratory, Veterinary and Agricultural Sciences Institute, Department of Veterinary Sciences, University of Batna 1, 05000, Batna, Algeria.
| | - K İnan Bektaş
- Department of Molecular Biology and Genetics, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - T Menasria
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, University of Larbi Tebessi, 12002, Tebessa, Algeria.
| | - A O Beldüz
- Molecular Biology Research Laboratory, Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - H I Güler
- Department of Molecular Biology and Genetics, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - I K Bedaida
- Department of Microbiology and Biochemistry, Faculty of Natural and Life Sciences, University of Batna 2, 05078, Batna, Algeria
| | - J M Gonzalez
- Spanish National Research Council Seville (CSIC), Institute of Natural Resources and Agrobiology of Seville (IRNAS), Seville, Spain
| | - A Ayachi
- Bacteriology Laboratory, Veterinary and Agricultural Sciences Institute, Department of Veterinary Sciences, University of Batna 1, 05000, Batna, Algeria
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Barcelos MCS, Ramos CL, Kuddus M, Rodriguez-Couto S, Srivastava N, Ramteke PW, Mishra PK, Molina G. Enzymatic potential for the valorization of agro-industrial by-products. Biotechnol Lett 2020; 42:1799-1827. [DOI: 10.1007/s10529-020-02957-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 06/30/2020] [Indexed: 12/13/2022]
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Şafak H, Otur Ç, Kurt-Kızıldoğan A. Molecular and biochemical characterization of a recombinant endoglucanase rCKT3eng, from an extreme halophilic Haloarcula sp. strain CKT3. Int J Biol Macromol 2020; 151:1173-1180. [PMID: 31751744 DOI: 10.1016/j.ijbiomac.2019.10.161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 10/18/2019] [Accepted: 10/18/2019] [Indexed: 10/25/2022]
Abstract
Halophilic cellulases are indispensable enzymes of heavy industrial processes as resistant biocatalysts due to high level activity at extreme conditions. In this study, crude cellulase from an extreme halophilic Haloarcula sp. CKT3 was characterized. Then, recombinant expression of putative endo-1,4-β-glucanase gene, of CKT3 strain, in E. coli BL21(DE3) was performed with the aim of obtaining highly pure, active and robust industrial enzyme for such industrial aplications. The crude cellulase had optimal activity (16.9 U/mg) at 70 °C, pH 7.0 and 4 M NaCl exhibiting good thermostability, high pH and halotolerance. Indeed, it is very stable in water-insoluble organic solvents with log Po/w ≥ 2.13 and highly resistant to SDS (10%). Recombinant CKT3eng has a molecular weight of 36.9 kDa and 99% aminoacid identity to endo-l,4-β-D-glucanase from Haloarcula argentinensis. Its 3D structure was predicted using Phyre2 and I-TASSER. rCKT3eng enzyme provided 31.6 U/mg activity at optimal 50 °C, pH 7.0 and 3 M NaCl. In addition to its quite similar stability values and resistance to organic solvents and SDS, rCKT3eng has superiority over crude enzyme with 1.87-fold higher specific activity. Therefore, rCKT3eng offers a promising enzyme for industrial use with its valuable activity and stability in extreme conditions.
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Affiliation(s)
- Haktan Şafak
- Enzyme and Microbial Biotechnology Section, Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayıs University, Samsun 55139, Turkey
| | - Çiğdem Otur
- Enzyme and Microbial Biotechnology Section, Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayıs University, Samsun 55139, Turkey
| | - Aslıhan Kurt-Kızıldoğan
- Enzyme and Microbial Biotechnology Section, Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayıs University, Samsun 55139, Turkey.
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25
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Sahli K, Gomri MA, Esclapez J, Gómez-Villegas P, Ghennai O, Bonete MJ, León R, Kharroub K. Bioprospecting and characterization of pigmented halophilic archaeal strains from Algerian hypersaline environments with analysis of carotenoids produced by Halorubrum sp. BS2. J Basic Microbiol 2020; 60:624-638. [PMID: 32338407 DOI: 10.1002/jobm.202000083] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/04/2020] [Accepted: 04/06/2020] [Indexed: 11/07/2022]
Abstract
A set of 110 extremely halophilic archaeal strains were isolated from seven distinct saline habitats located in different regions of Algeria. The physicochemical characterization of the samples showed that these habitats were thalassohaline. The carotenoid production from isolated strains varied from 0.1 to 3.68 µg/ml. Based on their physiological characteristics and pigment production, 43 strains were selected and identified by means of phenotypic tests and 16S ribosomal RNA gene sequencing. Phylogenetic analysis indicated that the isolates corresponded to the class Halobacteria and were closely related to genera Halorubrum, Haloarcula, Haloferax, Natrinema, Halogeometricum, Haloterrigena, and Halopiger. Carotenoids of the highest producer, strain Halorubrum sp. BS2 were identified using high-performance liquid chromatography-diode array detector and liquid chromatography-mass spectrometry. Bacterioruberin and bisanhydrobacterioruberin were the predominant carotenoids. The scavenging activity of these carotenoids reached 99% at a concentration of 18 μg/ml, which was much higher than that of ascorbic acid used as a reference compound. These carotenoids also exhibited significant antibacterial activities against four human-pathogenic strains and four fish-pathogenic strains. Variations in salinity, agitation rate, temperature, and light intensity were found to influence growth and carotenoid production of Halorubrum sp. BS2. Our results suggest that halophilic archaea represent a potential source for carotenoids, which are characterized by high antioxidant and antibacterial activities.
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Affiliation(s)
- Kaouther Sahli
- Laboratoire de Recherche Biotechnologie et Qualité des Aliments (BIOQUAL), Institut de la Nutrition, de l'Alimentation et des Technologies Agro-Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Constantine, Algeria
| | - Mohamed A Gomri
- Laboratoire de Recherche Biotechnologie et Qualité des Aliments (BIOQUAL), Institut de la Nutrition, de l'Alimentation et des Technologies Agro-Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Constantine, Algeria
| | - Julia Esclapez
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Division, Faculty of Science, University of Alicante, Alicante, Spain
| | - Patricia Gómez-Villegas
- Laboratory of Biochemistry, Faculty of Experimental Sciences, Marine International Campus of Excellence (CEIMAR), University of Huelva, Huelva, Spain
| | - Oulaya Ghennai
- Laboratoire de Recherche Biotechnologie et Qualité des Aliments (BIOQUAL), Institut de la Nutrition, de l'Alimentation et des Technologies Agro-Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Constantine, Algeria
| | - María-José Bonete
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Division, Faculty of Science, University of Alicante, Alicante, Spain
| | - Rosa León
- Laboratory of Biochemistry, Faculty of Experimental Sciences, Marine International Campus of Excellence (CEIMAR), University of Huelva, Huelva, Spain
| | - Karima Kharroub
- Laboratoire de Recherche Biotechnologie et Qualité des Aliments (BIOQUAL), Institut de la Nutrition, de l'Alimentation et des Technologies Agro-Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Constantine, Algeria
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26
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Benhadj M, Metrouh R, Menasria T, Gacemi-Kirane D, Slim FZ, Ranque S. Broad-spectrum antimicrobial activity of wetland-derived Streptomyces sp. ActiF450. EXCLI JOURNAL 2020; 19:360-371. [PMID: 32327957 PMCID: PMC7174574 DOI: 10.17179/excli2020-1124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 03/07/2020] [Indexed: 12/30/2022]
Abstract
The increased incidence of invasive infections and the emerging problem of drug resistance particularly for commonly used molecules have prompted investigations for new, safe and more effective microbial agents. Actinomycetes from unexplored habitats appear as a promising source for novel bioactive compounds with a broad range of biological activities. Thus, the present study aimed to isolate effective wetland-derived actinomycetes against major pathogenic fungi and bacteria. Water samples were collected from various locations of Fetzara Lake, Algeria. Thereafter, an actinomycete designated ActiF450 was isolated using starch-casein-agar medium. The antimicrobial potential of the newly isolated actinomycete was screened using the conventional agar cylinders method on Potato Dextrose Agar (PDA) against various fungal and bacterial pathogens. A wetland-derived Streptomyces sp. Actif450 was identified as Streptomycesmalaysiensis based on its physiological properties, morphological characteristics, and 16S rDNA gene sequence analysis. The antimicrobial activity of Streptomyces sp. ActiF450 showed a potent and broad spectrum activity against a range of human fungal pathogens including moulds and yeasts, such as Arthroderma vanbreuseghemii, Aspergillus fumigatus, A. niger, Candida albicans, C. glabarta, C. krusei, C. parapsilosis, Fusarium oxysporum, F. solani, Microsporum canis, Rhodotorula mucilaginous and Scodapulariopsis candida. In addition, high antibacterial activity was recorded against pathogenic staphylococci. The novel Streptomyces sp. ActiF450 may present a promising candidate for the production of new bioactive compounds with broad-spectrum antimicrobial activity.
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Affiliation(s)
- Mabrouka Benhadj
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, Larbi Tebessi University, 12002 Tebessa, Algeria.,Biomolecules and Application Laboratory, Faculty of Exact Sciences and Natural and Life Sciences, Larbi Tebessi University, 12002 Tebessa, Algeria
| | - Roumaisa Metrouh
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, Larbi Tebessi University, 12002 Tebessa, Algeria
| | - Taha Menasria
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, Larbi Tebessi University, 12002 Tebessa, Algeria
| | - Djamila Gacemi-Kirane
- Department of Biochemistry, Faculty of Science, University Badji Mokhtar Annaba, Annaba, 23000, Algeria
| | - Fatma Zohra Slim
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, Larbi Tebessi University, 12002 Tebessa, Algeria
| | - Stephane Ranque
- Aix Marseille University, IRD, APHM, SSA, VITROME, IHU-Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France
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27
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Hegazy GE, Abu-Serie MM, Abo-Elela GM, Ghozlan H, Sabry SA, Soliman NA, Abdel-Fattah YR. In vitro dual (anticancer and antiviral) activity of the carotenoids produced by haloalkaliphilic archaeon Natrialba sp. M6. Sci Rep 2020; 10:5986. [PMID: 32249805 PMCID: PMC7136267 DOI: 10.1038/s41598-020-62663-y] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 03/16/2020] [Indexed: 12/22/2022] Open
Abstract
Halophilic archaea are a promising natural source of carotenoids. However, little information is available about the biological impacts of these archaeal metabolites. Here, carotenoids of Natrialba sp. M6, which was isolated from Wadi El-Natrun, were produced, purified and identified by Raman spectroscopy, GC-mass spectrometry, and Fourier transform infrared spectroscopy, LC-mass spectrometry and Nuclear magnetic resonance spectroscopy. The C50 carotenoid bacterioruberin was found to be the predominant compound. Because cancer and viral hepatitis are serious diseases, the anticancer, anti-HCV and anti-HBV potentials of these extracted carotenoids (pigments) were examined for the first time. In vitro results indicated that the caspase-mediated apoptotic anticancer effect of this pigment and its inhibitory efficacy against matrix metalloprotease 9 were significantly higher than those of 5-fluorouracil. Furthermore, the extracted pigment exhibited significantly stronger activity for eliminating HCV and HBV in infected human blood mononuclear cells than currently used drugs. This antiviral activity may be attributed to its inhibitory potential against HCV RNA and HBV DNA polymerases, which thereby suppresses HCV and HBV replication, as indicated by a high viral clearance % in the treated cells. These novel findings suggest that the C50 carotenoid of Natrialba sp. M6 can be used as an alternative source of natural metabolites that confer potent anticancer and antiviral activities.
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Affiliation(s)
- Ghada E Hegazy
- Microbiology Department, Marine Environment, National Institute of Oceanography & Fisheries (NIOF), Alexandria, Egypt
| | - Marwa M Abu-Serie
- Medical Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria, Egypt
| | - Gehan M Abo-Elela
- Microbiology Department, Marine Environment, National Institute of Oceanography & Fisheries (NIOF), Alexandria, Egypt
| | - Hanan Ghozlan
- Microbiology Department, Faculty of Science, Alexandria, Egypt
| | - Soraya A Sabry
- Microbiology Department, Faculty of Science, Alexandria, Egypt
| | - Nadia A Soliman
- Bioprocess Development Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria, Egypt.
| | - Yasser R Abdel-Fattah
- Bioprocess Development Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria, Egypt.
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Characterization of Extracellular Protease from the Haloarcheon Halococcus sp. Strain GUGFAWS-3 (MF425611). Curr Microbiol 2020; 77:1024-1034. [DOI: 10.1007/s00284-020-01896-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/18/2020] [Indexed: 10/25/2022]
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29
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Ruginescu R, Purcărea C, Dorador C, Lavin P, Cojoc R, Neagu S, Lucaci I, Enache M. Exploring the hydrolytic potential of cultured halophilic bacteria isolated from the Atacama Desert. FEMS Microbiol Lett 2019; 366:5613365. [DOI: 10.1093/femsle/fnz224] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 10/31/2019] [Indexed: 01/23/2023] Open
Abstract
ABSTRACTConsidering that most industrial processes are carried out under harsh physicochemical conditions, which would inactivate enzymes from commonly isolated mesophilic organisms, current studies are geared toward the identification of extremophilic microorganisms producing enzymes resistant to extreme salt concentrations, temperature and pH. Among the extremophiles, halophilic microorganisms are an important source of salt-tolerant enzymes that can be used in varying biotechnological applications. In this context, the aim of the present work was to isolate and identify halophiles producing hydrolases from the Atacama Desert, one of the harshest environments on Earth. Isolates were recovered from halite samples and screened for the presence of seven different hydrolase activities (amylase, caseinase, gelatinase, lipase, pectinase, cellulase and inulinase) using agar plate-based assays. From a total of 23 halophilic bacterial isolates, most showed lipolytic (19 strains) and pectinolytic (11 strains) activities. The molecular identification of eight selected isolates showed a strong similarity to members of the Halomonas and Idiomarina genera. Therefore, the present study represents a preliminary, but essential, step to identify novel biological sources of extremozymes in an environment once thought to be devoid of life.
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Affiliation(s)
- Robert Ruginescu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, Bucharest, 060031, Romania
| | - Cristina Purcărea
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, Bucharest, 060031, Romania
| | - Cristina Dorador
- Laboratorio de Complejidad Microbiana y Ecología Funcional, Instituto Antofagasta, Universidad de Antofagasta, 601 Angamos Av., Antofagasta, 1240000, Chile
| | - Paris Lavin
- Laboratorio de Complejidad Microbiana y Ecología Funcional, Instituto Antofagasta, Universidad de Antofagasta, 601 Angamos Av., Antofagasta, 1240000, Chile
| | - Roxana Cojoc
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, Bucharest, 060031, Romania
| | - Simona Neagu
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, Bucharest, 060031, Romania
| | - Ioana Lucaci
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, Bucharest, 060031, Romania
| | - Mădălin Enache
- Department of Microbiology, Institute of Biology Bucharest of the Romanian Academy, 296 Splaiul Independentei, Bucharest, 060031, Romania
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Culturable halophilic bacteria inhabiting Algerian saline ecosystems: A source of promising features and potentialities. World J Microbiol Biotechnol 2019; 35:132. [PMID: 31432260 DOI: 10.1007/s11274-019-2705-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 07/30/2019] [Indexed: 01/09/2023]
Abstract
This paper aims to characterize halophilic bacteria inhabiting Algerian Saline Ecosystems (Sebkha and Chott) located in arid and semi-arid ecoclimate zones (Northeastern Algeria). In addition, screening of enzymatic activities, heavy metal tolerance and antagonistic potential against phytopathogenic fungi were tested. A total of 74 bacterial isolates were screened and phylogenetically characterized using 16S rRNA gene sequencing. The results showed a heterogeneous group of microorganisms falling within two major phyla, 52 strains belonging to Firmicutes (70.2%) and 22 strains (30.8%) of γ-Proteobacteria. In terms of main genera present, the isolates were belonging to Bacillus, Halobacillus, Lentibacillus, Oceanobacillus, Paraliobacillus, Planomicrobium, Salicola, Terribacillus, Thalassobacillus, Salibacterium, Salinicoccus, Virgibacillus, Halomonas, Halovibrio, and Idiomarina. Most of the enzymes producers were related to Bacillus, Halobacillus, and Virgibacillus genera and mainly active at 10% of growing salt concentrations. Furthermore, amylase, esterase, gelatinase, and nuclease activities ranked in the first place within the common hydrolytic enzymes. Overall, the isolates showed high minimal inhibitory concentration values (MIC) for Ni2+ and Cu2+ (0.625 to 5 mM) compared to Cd2+ (0.1 to 2 mM) and Zn2+ (0.156 to 2 mM). Moreover, ten isolated strains belonging to Bacillus, Virgibacillus and Halomonas genera, displayed high activity against the pathogenic fungi (Botrytis cinerea, Fusarium oxyporum, F. verticillioides and Phytophthora capsici). This study on halophilic bacteria of unexplored saline niches provides potential sources of biocatalysts and novel bioactive metabolites as well as promising candidates of biocontrol agents and eco-friendly tools for heavy metal bioremediation.
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31
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Biofouling of FeNP-Coated SWRO Membranes with Bacteria Isolated after Pre-Treatment in the Sea of Cortez. COATINGS 2019. [DOI: 10.3390/coatings9070462] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Commercial seawater reverse osmosis (SWRO) membranes were coated with iron nanoparticles (FeNPs) and biofouled with a bacterium strain isolated from the Sea of Cortez, Mexico. This strain was selected and characterized, as it was the only cultivable strain in pretreated seawater. Molecular identification of the strain showed that it belongs to Bacillus halotolerans MCC1. This strain was Gram positive with spore production, and was susceptible to Fe+2 toxicity with a minimum inhibitory concentration of 1.8 g L−1. Its biofouling potential on both uncoated and FeNP coated reverse osmosis (RO) membranes was measured via biofilm layer thickness, total cell count, optical density and organic matter. The FeNP-coated RO membrane presented a significant reduction in biofilm cake layer thickness (>90%), total cells (>67%), optical density (>42%) and organic matter (>92%) with respect to an uncoated commercial membrane. Thus, Bacillus halotolerans MCC1 shows great potential to biofoul RO membranes as it can pass through ultrafiltration membranes due to its spore producing ability; nonetheless, FeNP-coated membranes represent a potential alternative to mitigate RO membrane biofouling.
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32
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Microorganisms for Cellulase Production: Availability, Diversity, and Efficiency. Fungal Biol 2019. [DOI: 10.1007/978-3-030-14726-6_4] [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]
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33
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Isolation and characterization of halophilic bacteria producing exopolymers with emulsifying and antioxidant activities. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.10.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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34
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Akmoussi-Toumi S, Khemili-Talbi S, Ferioune I, Kebbouche-Gana S. Purification and characterization of an organic solvent-tolerant and detergent-stable lipase from Haloferax mediterranei CNCMM 50101. Int J Biol Macromol 2018; 116:817-830. [DOI: 10.1016/j.ijbiomac.2018.05.087] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 05/12/2018] [Accepted: 05/14/2018] [Indexed: 10/16/2022]
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Dekak A, Chabi R, Menasria T, Benhizia Y. Phenotypic characterization of rhizobia nodulating legumes Genista microcephala and Argyrolobium uniflorum growing under arid conditions. J Adv Res 2018; 14:35-42. [PMID: 30009051 PMCID: PMC6041434 DOI: 10.1016/j.jare.2018.06.001] [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: 01/19/2018] [Revised: 06/01/2018] [Accepted: 06/01/2018] [Indexed: 01/14/2023] Open
Abstract
A phenotypic characterization of thirteen root nodule bacteria recovered from wild legumes (Genista microcephala and Argyrolobium uniflorum) growing in arid eco-climate zones (Northeastern Algeria) was conducted using analysis of sixty-six phenotypic traits (carbohydrate and nitrogen assimilation, vitamin requirements, growth temperature, salinity/pH tolerance and enzyme production). Furthermore, SDS-PAGE profiles of total cell protein, antibiotic susceptibility and heavy metal resistance were performed. The results showed that the isolates can grow at pH 4 to 10, salt concentration (0–5%) and temperature up to 45 °C. The rhizobia associated with Genista microcephala and Argyrolobium uniflorum were able to produce different hydrolytic enzymes including cellulose, pectinase and urease, with remarkable tolerance to toxic metals such as zinc, lead, copper, and mercury. Numerical analysis of the phenotypic characteristics revealed that the rhizobial isolates formed four main distinct groups showing high levels of similarity with Gammaproteobacteria. The salt tolerant and heavy metals resistance patterns found among the indigenous rhizobial strains are reflecting the environmental stresses pressure and make the strains good candidates for plant successful inoculation in arid areas.
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Affiliation(s)
- Ahmed Dekak
- Department of Biological Sciences, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa 12002, Algeria.,Department of Microbiology, Faculty of Natural and Life Sciences, University of Constantine I, Constantine 25000, Algeria
| | - Rabah Chabi
- Department of Microbiology, Faculty of Natural and Life Sciences, University of Constantine I, Constantine 25000, Algeria
| | - Taha Menasria
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa 12002, Algeria
| | - Yacine Benhizia
- Department of Microbiology, Faculty of Natural and Life Sciences, University of Constantine I, Constantine 25000, Algeria
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