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Bouhidel Z, Sahli K, Cherouana A. Crystal structure and Hirshfeld surface analysis of a new benzimidazole compound, 3-{1-[(2-hy-droxyphen-yl)meth-yl]-1 H-1,3-benzo-diazol-2-yl}phenol. Acta Crystallogr E Crystallogr Commun 2024; 80:18-21. [PMID: 38312163 PMCID: PMC10833379 DOI: 10.1107/s2056989023010368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 12/01/2023] [Indexed: 02/06/2024]
Abstract
The title compound, C20H16N2O2, is composed of two monosubstituted benzene rings and one benzimidazole unit. The benzimidazole moiety subtends dihedral angles of 46.16 (7) and 77.45 (8)° with the benzene rings, which themselves form a dihedral angle of 54.34 (9)°. The crystal structure features O-H⋯N and O-H⋯O hydrogen-bonding inter-actions, which together lead to the formation of two-dimensional hydrogen-bonded layers parallel to the (101) plane. In addition, π-π inter-actions also contribute to the crystal cohesion. Hirshfeld surface analysis indicates that the most significant contacts in the crystal packing are: H⋯H (47.5%), O⋯H/H⋯O (12.4%), N⋯H/H⋯N (6.1%), C⋯H/H⋯C (27.6%) and C⋯C (4.6%).
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Affiliation(s)
- Zakaria Bouhidel
- Unité de Recherche de Chimie de l’Environnement et Moléculaire Structurale (URCHEMS), Département de Chimie, Université Mentouri de Constantine, 25000 Constantine, Algeria
| | - Kaouther Sahli
- Pharmaceutical Sciences Research Center CRSP, Constantine 25000, Algeria
| | - Aouatef Cherouana
- Unité de Recherche de Chimie de l’Environnement et Moléculaire Structurale (URCHEMS), Département de Chimie, Université Mentouri de Constantine, 25000 Constantine, Algeria
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Sahli K, Gomri MA, Esclapez J, Gómez-Villegas P, Bonete MJ, León R, Kharroub K. Characterization and biological activities of carotenoids produced by three haloarchaeal strains isolated from Algerian salt lakes. Arch Microbiol 2021; 204:6. [PMID: 34870747 DOI: 10.1007/s00203-021-02611-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 10/19/2022]
Abstract
Halophilic archaea represent a promising natural source of carotenoids. However, little information is available about these archaeal metabolites and their biological effects. In the present work, carotenoids of strains Haloferax sp. ME16, Halogeometricum sp. ME3 and Haloarcula sp. BT9, isolated from Algerian salt lakes, were produced, extracted and identified by high-performance liquid chromatography-diode array detector and liquid chromatography-mass spectrometry. Analytical results revealed a variation in the composition depending on the strain with a predominance of bacterioruberin. The evaluation of antioxidant capacity using ABTS [(2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)] and DPPH (2,2-diphenyl-1-picrylhydrazyl) assays showed that these extracts have a strong antioxidant potential, in particular those of Haloferax sp. ME16 which displayed antioxidant power significantly higher than that of ascorbic acid used as standard. Antibacterial activity of carotenoid extracts against four human-pathogenic strains and four fish-pathogenic strains was evaluated by agar disk diffusion method. The results showed a good antibacterial activity. These findings suggest that the C50 carotenoids from the studied strains offer promising prospects for biotechnological applications.
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Affiliation(s)
- Kaouther Sahli
- Équipe Métabolites Des Extremophiles (METEX), 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), Route de Ain el Bey, 25000, Constantine, Algeria.
| | - Mohamed Amine Gomri
- Équipe Métabolites Des Extremophiles (METEX), 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), Route de Ain el Bey, 25000, Constantine, Algeria
| | - Julia Esclapez
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Division, Faculty of Science, University of Alicante, Ap 99, 03080, Alicante, Spain
| | - Patricia Gómez-Villegas
- Laboratory of Biochemistry, Faculty of Experimental Sciences, Marine International Campus of Excellence (CEIMAR), University of Huelva, 2110, Huelva, Spain
| | - María-José Bonete
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Division, Faculty of Science, University of Alicante, Ap 99, 03080, Alicante, Spain
| | - Rosa León
- Laboratory of Biochemistry, Faculty of Experimental Sciences, Marine International Campus of Excellence (CEIMAR), University of Huelva, 2110, Huelva, Spain
| | - Karima Kharroub
- Équipe Métabolites Des Extremophiles (METEX), 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), Route de Ain el Bey, 25000, Constantine, Algeria
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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