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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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Amoozegar MA, Siroosi M, Atashgahi S, Smidt H, Ventosa A. Systematics of haloarchaea and biotechnological potential of their hydrolytic enzymes. MICROBIOLOGY-SGM 2017; 163:623-645. [PMID: 28548036 DOI: 10.1099/mic.0.000463] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Halophilic archaea, also referred to as haloarchaea, dominate hypersaline environments. To survive under such extreme conditions, haloarchaea and their enzymes have evolved to function optimally in environments with high salt concentrations and, sometimes, with extreme pH and temperatures. These features make haloarchaea attractive sources of a wide variety of biotechnological products, such as hydrolytic enzymes, with numerous potential applications in biotechnology. The unique trait of haloarchaeal enzymes, haloenzymes, to sustain activity under hypersaline conditions has extended the range of already-available biocatalysts and industrial processes in which high salt concentrations inhibit the activity of regular enzymes. In addition to their halostable properties, haloenzymes can also withstand other conditions such as extreme pH and temperature. In spite of these benefits, the industrial potential of these natural catalysts remains largely unexplored, with only a few characterized extracellular hydrolases. Because of the applied impact of haloarchaea and their specific ability to live in the presence of high salt concentrations, studies on their systematics have intensified in recent years, identifying many new genera and species. This review summarizes the current status of the haloarchaeal genera and species, and discusses the properties of haloenzymes and their potential industrial applications.
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Affiliation(s)
- Mohammad Ali Amoozegar
- Extremophiles Laboratory, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
| | - Maryam Siroosi
- Extremophiles Laboratory, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
| | - Siavash Atashgahi
- Laboratory of Microbiology, Wageningen University, Wageningen, The Netherlands
| | - Hauke Smidt
- Laboratory of Microbiology, Wageningen University, Wageningen, The Netherlands
| | - Antonio Ventosa
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, Sevilla, Spain
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Zhang WY, Hu J, Pan J, Sun C, Wu M, Xu XW. Draft genome sequence of Halopiger salifodinae KCY07-B2(T), an extremly halophilic archaeon isolated from a salt mine. Stand Genomic Sci 2015; 10:124. [PMID: 26664653 PMCID: PMC4675023 DOI: 10.1186/s40793-015-0113-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 11/24/2015] [Indexed: 12/13/2022] Open
Abstract
Halopiger salifodinae strain KCY07-B2(T), isolated from a salt mine in Kuche county, Xinjiang province, China, belongs to the family Halobacteriaceae. It is a strictly aerobic, pleomorphic, rod-shaped, Gram-negative and extremely halophilic archaeon. In this work, we report the features of the type strain KCY07-B2(T), together with the draft genome sequence and annotation. The draft genome sequence is composed of 83 contigs for 4,350,718 bp with 65.41 % G + C content and contains 4204 protein-coding genes and 50 rRNA genes.
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Affiliation(s)
- Wei-Yan Zhang
- />College of Life Sciences, Zhejiang University, Hangzhou, 310058 P. R. China
| | - Jing Hu
- />College of Life Sciences, Zhejiang University, Hangzhou, 310058 P. R. China
| | - Jie Pan
- />College of Life Sciences, Zhejiang University, Hangzhou, 310058 P. R. China
| | - Cong Sun
- />College of Life Sciences, Zhejiang University, Hangzhou, 310058 P. R. China
| | - Min Wu
- />College of Life Sciences, Zhejiang University, Hangzhou, 310058 P. R. China
| | - Xue-Wei Xu
- />Second Institute of Oceanography, State Oceanic Administration, Hangzhou, 310012 P. R. China
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