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Jui AH, Bhuiyan MNI, Bhowmik B, Khatun N, Chowdhury A, Bhuiyan RH, Kabir MA, Rashid MM, Bhuiyan MHR, Afrin S. Exploration and characterization of a newly isolated bacterium, Enterobacter quasihormaechei strain BDIFST24001, capable of producing rhamnolipid biosurfactant for oil remediation. Access Microbiol 2024; 6:000830.v4. [PMID: 39100884 PMCID: PMC11293832 DOI: 10.1099/acmi.0.000830.v4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 07/16/2024] [Indexed: 08/06/2024] Open
Abstract
Biosurfactants are naturally occurring compounds synthesized by micro-organisms that increasingly attract attention due to both their living area and application in various industries. In this study, we explore and characterize a novel bacterium, Enterobacter quasihormaechei strain BDIFST24001, isolated for its ability to produce rhamnolipid biosurfactants, with the aim of facilitating oil remediation processes. The isolation of this bacterium was carried out using Luria-Bertani (LB) broth media from environmental samples collected from oil-contaminated sites in Dhaka City. Screening tests, including the oil spreading method and drop collapse assay, were conducted to identify potential biosurfactant-producing strains, leading to the selection of E. quasihormaechei strain BDIFST24001 based on its favourable performance. Subsequent molecular identification revealed a high similarity of the strain's 16S rRNA gene to E. quasihormaechei, which was corroborated through phylogenetic analysis. Further analysis of the biosurfactant produced by this strain indicated its rhamnolipid nature, as confirmed by FT-IR spectroscopy. The rhamnolipids exhibited promising surface-active properties, including a significant reduction in surface tension and emulsification activity, as evidenced by surface tension measurements and emulsification index assays. Optimization studies revealed that the optimal conditions for rhamnolipid production by E. quasihormaechei strain BDIFST24001 were a temperature of 37 °C, pH 10.0 and salinity of 4 %. The rhamnolipids produced by this strain demonstrated effective oil remediation capabilities, as observed through controlled experiments using petrol oil. The rhamnolipids effectively reduced the surface tension of the oil-water interface, facilitating the dispersion and emulsification of the oil phase in water. Overall, our findings highlight the potential of E. quasihormaechei strain BDIFST24001 as a promising candidate for biosurfactant-mediated oil spill cleanup and environmental remediation efforts.
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Affiliation(s)
- Afsana Habib Jui
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Mohammad Nazrul Islam Bhuiyan
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Banasree Bhowmik
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Nazia Khatun
- BCSIR Dhaka Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Abhijit Chowdhury
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Riyadh Hossen Bhuiyan
- BCSIR Dhaka Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Md. Alamgir Kabir
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Md. Mamunur Rashid
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Md. Habibur Rahman Bhuiyan
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
| | - Sadia Afrin
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
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Irfan Z, Firdous SM, Citarasu T, Uma G, Thirumalaikumar E. Isolation and screening of antimicrobial biosurfactants obtained from mangrove plant root-associated bacteria. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:3261-3274. [PMID: 37930391 DOI: 10.1007/s00210-023-02806-w] [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: 09/01/2023] [Accepted: 10/20/2023] [Indexed: 11/07/2023]
Abstract
The unique properties of biosurfactants obtained from microbes, including their activity at extreme temperatures, make them more attractive than synthetic alternatives. Henceforth, the principle objective is to isolate and detect the antibacterial and antifungal activities of the biosurfactants produced from bacteria of the economically competitive mangrove ecosystem. Using the serial dilution method, 53 bacterial strains were recovered from the Manakudy mangrove forest in Kanyakumari, India, for the investigation. Different biosurfactant screening methods and morphological and biochemical tests were opted to select the potential biosurfactant producer. After the initial screening, two strains were discovered by 16S rRNA gene sequencing followed by extraction using chloroform: methanol (2:1) by the precipitation method. The partially purified biosurfactants were then screened for antimicrobial properties against pathogens including Mucor sp., Trichoderma sp. Morphological, biochemical, and 16S rRNA gene sequencing identified the two strains to be gram-positive, rod-shaped bacteria namely Virgibacillus halodentrificans CMST-ZI (GenBank Accession No.: OL336402.1) and Pseudomonas pseudoalcaligenes CMST-ZI (GenBank Accession No (10 K): OL308085.1). The two extracted biosurfactants viz., 1,2-benzenedicarboxylic acid, mono (2-ethylhexyl) ester, as well as cycloheptane efficiently inhibited human pathogens, including Enterococcus faecalis, and fungi, including Mucor sp., Trichoderma sp., indicated by the formation of a zone of inhibition in pharmacological screening. Thus, there is a growing interest in the prospective application of these biosurfactants isolated from marine microbes, exhibiting antimicrobial properties which can be further studied as a potential candidate in biomedical studies and eco-friendly novel drug development.
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Affiliation(s)
- Zainab Irfan
- Department of Pharmaceutical Technology, Brainware University, Barasat, Kolkata, West Bengal, India
| | - Sayeed Mohammed Firdous
- Department of Pharmacology, Calcutta Institute of Pharmaceutical Technology & AHS, Uluberia, Howrah-711316, West Bengal, India.
| | - Thavasimuthu Citarasu
- Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Kanyakumari District, Tamil Nadu, India.
| | - Ganapathi Uma
- Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Kanyakumari District, Tamil Nadu, India
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Ghafouri M, Pourjafar F, Ghobadi Nejad Z, Yaghmaei S. Biological treatment of triclosan using a novel strain of Enterobacter cloacae and introducing naphthalene dioxygenase as an effective enzyme. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:131833. [PMID: 37473572 DOI: 10.1016/j.jhazmat.2023.131833] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 05/22/2023] [Accepted: 06/09/2023] [Indexed: 07/22/2023]
Abstract
In recent years, triclosan (TCS) has been widely used as an antibacterial agent in personal care products due to the spread of the Coronavirus. TSC is an emerging contaminant, and due to its stability and toxicity, it cannot be completely degraded through traditional wastewater treatment methods. In this study, a novel strain of Enterobacter cloacae was isolated and identified that can grow in high TCS concentrations. Also, we introduced naphthalene dioxygenase as an effective enzyme in TCS biodegradation, and its role during the removal process was investigated along with the laccase enzyme. The change of cell surface hydrophobicity during TCS removal revealed that a glycolipid biosurfactant called rhamnolipid was involved in TCS removal, leading to enhanced biodegradation of TCS. The independent variables, such as initial TCS concentration, pH, removal duration, and temperature, were optimized using the response surface method (RSM). As a result, the maximum TCS removal (97%) was detected at a pH value of 7 and a temperature of 32 °C after 9 days and 12 h of treatment. Gas chromatography-mass spectrometry (GC/MS) analysis showed five intermediate products and a newly proposed pathway for TCS degradation. Finally, the phytotoxicity experiment conducted on Cucumis sativus and Lens culinaris seeds demonstrated an increase in germination power and growth of stems and roots in comparison to untreated water. These results indicate that the final treated water was less toxic.
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Affiliation(s)
- Mahsa Ghafouri
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Fatemeh Pourjafar
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Zahra Ghobadi Nejad
- Biochemical & Bioenvironmental Research Center, Sharif University of Technology, Azadi Avenue, P.O Box 11155-1399, Tehran, Iran
| | - Soheila Yaghmaei
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran; Biochemical & Bioenvironmental Research Center, Sharif University of Technology, Azadi Avenue, P.O Box 11155-1399, Tehran, Iran.
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Daku AB, AL-Mhanna SB, Abu Bakar R, Nurul AA. Glycolipids isolation and characterization from natural source: A review. J LIQ CHROMATOGR R T 2023. [DOI: 10.1080/10826076.2023.2165097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Abubakar Bishir Daku
- School of Health Sciences, Universiti Sains Malaysia, Health Campus, Kubang Kerian, Malaysia
- Department of Human Physiology, Faculty of Basic Medical Sciences, Federal University, Dutse, Nigeria
| | - Sameer Badri AL-Mhanna
- School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kubang Kerian, Malaysia
| | - Ruzilawati Abu Bakar
- School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kubang Kerian, Malaysia
| | - Asma Abdullah Nurul
- School of Health Sciences, Universiti Sains Malaysia, Health Campus, Kubang Kerian, Malaysia
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Loza A, García-Guevara F, Segovia L, Escobar-Zepeda A, Sanchez-Olmos MDC, Merino E, Sanchez-Flores A, Pardo-Lopez L, Juarez K, Gutierrez-Rios RM. Definition of the Metagenomic Profile of Ocean Water Samples From the Gulf of Mexico Based on Comparison With Reference Samples From Sites Worldwide. Front Microbiol 2022; 12:781497. [PMID: 35178038 PMCID: PMC8846951 DOI: 10.3389/fmicb.2021.781497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 12/23/2021] [Indexed: 11/13/2022] Open
Abstract
Computational and statistical analysis of shotgun metagenomes can predict gene abundance and is helpful for elucidating the functional and taxonomic compositions of environmental samples. Gene products are compared against physicochemical conditions or perturbations to shed light on the functions performed by the microbial community of an environmental sample; however, this information is not always available. The present study proposes a method for inferring the metabolic potential of metagenome samples by constructing a reference based on determining the probability distribution of the counts of each enzyme annotated. To test the methodology, we used marine water samples distributed worldwide as references. Then, the references were utilized to compare the annotated enzymes of two different water samples extracted from the Gulf of Mexico (GoM) to distinguish those enzymes with atypical behavior. The enzymes whose annotation counts presented frequencies significantly different from those of the reference were used to perform metabolic reconstruction, which naturally identified pathways. We found that several of the enzymes were involved in the biodegradation of petroleum, which is consistent with the impact of human hydrocarbon extraction activity and its ubiquitous presence in the GoM. The examination of other reconstructed pathways revealed significant enzymes indicating the presence of microbial communities characterizing each ocean depth and ocean cycle, providing a fingerprint of each sampled site.
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