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Arora J, Chauhan A, Ranjan A, Rajput VD, Minkina T, Zhumbei AI, Kumari A, Jindal T, Prasad R. Degradation of SDS by psychrotolerant Staphylococcus saprophyticus and Bacillus pumilus isolated from Southern Ocean water samples. Braz J Microbiol 2024; 55:1507-1519. [PMID: 38468117 PMCID: PMC11153461 DOI: 10.1007/s42770-024-01294-1] [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: 10/28/2023] [Accepted: 02/26/2024] [Indexed: 03/13/2024] Open
Abstract
Bioremediation of surfactants in water bodies holds significant ecological importance as they are contaminants of emerging concern posing substantial threats to the aquatic environment. Microbes exhibiting special ability in terms of bioremediation of contaminants have always been reported to thrive in extraordinary environmental conditions that can be extreme in terms of temperature, lack of nutrients, and salinity. Therefore, in the present investigation, a total of 46 bacterial isolates were isolated from the Indian sector of the Southern Ocean and screened for degradation of sodium dodecyl sulphate (SDS). Further, two Gram-positive psychrotolerant bacterial strains, ASOI-01 and ASOI-02 were identified with significant SDS degradation potential. These isolates were further studied for growth optimization under different environmental conditions. The strains were characterized as Staphylococcus saprophyticus and Bacillus pumilus based on morphological, biochemical, and molecular (16S RNA gene) characteristics. The study reports 88.9% and 93.4% degradation of SDS at a concentration of 100 mgL-1, at 20 °C, and pH 7 by S. saprophyticus ASOI-01 and B. pumilus ASOI-02, respectively. The experiments were also conducted in wastewater samples where a slight reduction in degradation efficiency was observed with strains ASOI-01 and ASOI-02 exhibiting 76.83 and 64.93% degradation of SDS respectively. This study infers that these bacteria can be used for the bioremediation of anionic surfactants from water bodies and establishes the potential of extremophilic microbes for the utilization of sustainable wastewater management.
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Affiliation(s)
- Jayati Arora
- Amity Institute of Environmental Science, Amity University, Noida, Uttar Pradesh, India
| | - Abhishek Chauhan
- Amity Institute of Environmental Toxicology, Safety and Management, Amity University, Noida, Uttar Pradesh, India
| | - Anuj Ranjan
- Amity Institute of Environmental Toxicology, Safety and Management, Amity University, Noida, Uttar Pradesh, India.
- Academy of Biology and Biotechnology, Southern Federal University, Stachki 194/1, Rostov-On-Don, Russia.
| | - Vishnu D Rajput
- Academy of Biology and Biotechnology, Southern Federal University, Stachki 194/1, Rostov-On-Don, Russia
| | - Tatiana Minkina
- Academy of Biology and Biotechnology, Southern Federal University, Stachki 194/1, Rostov-On-Don, Russia
| | - Anton Igorevich Zhumbei
- Academy of Biology and Biotechnology, Southern Federal University, Stachki 194/1, Rostov-On-Don, Russia
| | - Arpna Kumari
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo-Ku, Tokyo, Japan
| | - Tanu Jindal
- Amity Institute of Environmental Toxicology, Safety and Management, Amity University, Noida, Uttar Pradesh, India
| | - Ram Prasad
- Department of Botany, Mahatma Gandhi Central University, Motihari, 845401, Bihar, India.
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Arora J, Ranjan A, Chauhan A, Rajput VD, Sushkova S, Prazdnova EV, Minkina T, Biswas R, Joshi S, Jindal T, Prasad R. A Novel Study on Anionic Surfactant Degradation Potential of Psychrophillic and Psychrotolerant Pseudomonas spp. Identified from Surfactant-contaminated River Water. Appl Biochem Biotechnol 2024; 196:2612-2629. [PMID: 37466886 DOI: 10.1007/s12010-023-04647-y] [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] [Accepted: 07/04/2023] [Indexed: 07/20/2023]
Abstract
The Yamuna River, a tributary of the holy Ganga, is heavily polluted in the Delhi-NCR region, India and has been gaining attention due to the excessive foaming of the river over the past few years. This can be directly or indirectly related to the overuse of surfactants and the discharge of untreated domestic and textile wastewater into the river. To determine the surfactant load and investigate potential surfactant-degrading bacteria in the region, 96 water samples from four sites in the Okhla Barrage stretch of the river were collected and analysed. The results showed that the selected sites have surfactant concentrations more than the permissible limit (1.00 mgL-1). Also, at most of the sites, the concentration crossed the desirable limit of BIS (0.2 mgL-1) during the period of analysis. The concentration of anionic surfactant reported in the region was found in the range of 0.29 mgL-1 and 2.83 mgL-1. A total of 38 different bacteria were isolated using selective media from the same water samples, out of which 7 bacterial isolates were screened for sodium dodecyl sulphate (SDS) tolerance activity. Based on 16S rRNA gene sequencing, 2 species, namely Pseudomonas koreensis YRW-02 and Pseudomonas songnenensis YRW-05 have been identified and their degradation potential was assessed at different SDS concentrations. The results showed that our strains YRW-02 and YRW-05 degraded 78.29 and 69.24% of SDS respectively. Growth optimization was also performed at different substrate concentrations, pH, and temperature to investigate optimum degradation conditions. This study plays a significant role in assessing the surfactant load and also gives a promising background for future use in in-situ bioremediation experiments.
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Affiliation(s)
- Jayati Arora
- Amity Institute of Environmental Science, Amity University, Noida, Uttar Pradesh, India
| | - Anuj Ranjan
- Amity Institute of Environmental Toxicology Safety and Management, Amity University, Noida, Uttar Pradesh, India.
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-On-Don, Russia.
| | - Abhishek Chauhan
- Amity Institute of Environmental Toxicology Safety and Management, Amity University, Noida, Uttar Pradesh, India
| | - Vishnu D Rajput
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-On-Don, Russia
| | - Svetlana Sushkova
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-On-Don, Russia
| | - Evgeniya V Prazdnova
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-On-Don, Russia
| | - Tatiana Minkina
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-On-Don, Russia
| | - Rima Biswas
- CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
| | - Sanket Joshi
- Oil & Gas Research Centre, Central Analytical and Applied Research Unit, Sultan Qaboos University, Muscat, Oman
| | - Tanu Jindal
- Amity Institute of Environmental Toxicology Safety and Management, Amity University, Noida, Uttar Pradesh, India
| | - Ram Prasad
- Department of Botany, Mahatma Gandhi Central University, Motihari, 845401, Bihar, India.
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Arora J, Ranjan A, Chauhan A, Biswas R, Rajput VD, Sushkova S, Mandzhieva S, Minkina T, Jindal T. Surfactant Pollution, an Emerging Threat to Ecosystem: Approaches for Effective Bacterial Degradation. J Appl Microbiol 2022; 133:1229-1244. [PMID: 35598183 DOI: 10.1111/jam.15631] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/30/2022] [Accepted: 05/13/2022] [Indexed: 12/08/2022]
Abstract
The use of surfactants in households and industries is inevitable and so is their discharge into the environment, especially into the water bodies as effluents. Being surface-active agents, their utilization is mostly seen in soaps, detergents, personal care products, emulsifiers, wetting agents, etc. Anionic surfactants are the most used class. These surfactants are responsible for the foam and froth in the water bodies and cause potential adverse effects to both biotic and abiotic components of the ecosystem. Surfactants are capable of penetrating the cell membrane and thus cause toxicity to living organisms. Accumulation of these compounds has been known to cause significant gill damage and loss of sight in fish. Alteration of physiological and biochemical parameters of water decreases the amount of dissolved oxygen and thus affecting the entire ecosystem. Microbes utilizing surfactants as substrates for energy form the basis of the biodegradation of these compounds. The main organisms for surfactant biodegradation, both in sewage and natural waters, are bacteria. Several Pseudomonas and Bacillus spp. have shown efficient degradation of anionic surfactants namely: sodium dodecyl sulphate (SDS), linear alkylbenzene sulphonate (LAS), sodium dodecylbenzenesulphonate (SDBS). Also, several microbial consortia constituting Alcaligenes spp., Citrobacter spp., etc. have shown efficacy in the degradation of surfactants. The biodegradation efficiency studies of these microbes/microbial consortia would be of immense help in formulating better solutions for the bioremediation of surfactants and help to reduce their potential environmental hazards.
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Affiliation(s)
- Jayati Arora
- Amity Institute of Environmental Science, Amity University, Noida, Uttar Pradesh, India
| | - Anuj Ranjan
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Abhishek Chauhan
- Amity Institute of Environmental Toxicology, Safety and Management, Amity University, Noida, Uttar Pradesh, India
| | - Rima Biswas
- CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
| | - Vishnu D Rajput
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Svetlana Sushkova
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Saglara Mandzhieva
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Tatiana Minkina
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Tanu Jindal
- Amity Institute of Environmental Toxicology, Safety and Management, Amity University, Noida, Uttar Pradesh, India
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John EM, Varghese EM, Shaike JM. Plasmid-Mediated Biodegradation of Chlorpyrifos and Analysis of Its Metabolic By-Products. Curr Microbiol 2020; 77:3095-3103. [PMID: 32715316 DOI: 10.1007/s00284-020-02115-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/06/2020] [Indexed: 11/29/2022]
Abstract
Organophosphate pesticide persistence is an emerging menace to the environment and despite this fact, its use has been enhanced due to its high efficiency. Bioremediation using microorganisms would be the only means by which these hazardous compounds could be wiped out without disturbing the environmental harmony. The current work studied the molecular mechanism of degradation of Chlorpyrifos (CP) by a bacterial consortium C5 comprising of three soil isolates Staphylococcus warneri (CPI 2), Pseudomonas putida (CPI 9) and Stenotrophomonas maltophilia (CPI 15), which unveiled that the property is plasmid borne. All the isolates were found to possess a 4 kb plasmid which could be cured only by using sodium azide. The Escherichia coli JM109 cells when transformed individually with the plasmid of the isolates showed CP degradation in mineral salts medium (MSM) that contained CP as the sole carbon source. The degradative enzyme organophosphorus hydrolase (~ 60 KDa) of the isolates was extracted and purified to 31.85, 26 and 37.74 fold, respectively. The possible metabolic by-products of CP degradation by the consortium C5, were also analysed. The LC-Q-Tof MS analysis revealed the presence of the major metabolite 3, 5, 6 -trichloropyridine (TCP) with the formation of chlorpyrifos oxon as the intermediate. The isolates also showed trichloropyridine degradation (> 80%) individually in MSM-TCP medium proving its efficiency to remediate both CP and TCP.
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Affiliation(s)
- Elizabeth M John
- School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, 686560, India
| | - Edna M Varghese
- School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, 686560, India
| | - Jisha M Shaike
- School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, 686560, India.
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6
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Furmanczyk EM, Lipinski L, Dziembowski A, Sobczak A. Genomic and Functional Characterization of Environmental Strains of SDS-Degrading Pseudomonas spp., Providing a Source of New Sulfatases. Front Microbiol 2018; 9:1795. [PMID: 30174655 PMCID: PMC6107682 DOI: 10.3389/fmicb.2018.01795] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 07/17/2018] [Indexed: 01/09/2023] Open
Abstract
Biochemical, physiological and genomic comparisons of two Pseudomonas strains, assigned previously to the Pseudomonas jessenii subgroup, which are efficient SDS-degraders were carried out. A GO enrichment analysis showed that the genomes of SDS-degraders encode more genes connected with bacterial cell wall biosynthesis and alkanesulfonate monooxygenase activity than their closest relatives from the P. jessenii subgroup. A transcriptomic analysis of the most promising strain exposed to detergent suggests that although SDS can be later utilized as a carbon source, in early stages it influences cell envelope integrity, causing a global stress response followed by cell wall modification and induction of repair mechanisms. Genomes of the analyzed strains from P. jessenii group encode multiple putative sulfatases and their enzymatic activity was experimentally verified, which led to the identification of three novel enzymes exhibiting activity toward SDS. Two of the novel alkylsulfatases showed their highest activity at pH 8.0 and the temperature of 60°C or 70°C. One of the enzymes retained its activity even after 1 h of incubation at 60°C. Ions like K+ and Mg2+ enhanced enzymatic activity of both proteins, whereas Cu2+ or EDTA had inhibitory effects.
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Affiliation(s)
- Ewa M Furmanczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Leszek Lipinski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Andrzej Dziembowski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.,Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Adam Sobczak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.,Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland
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Shanthi M, Rajesh Banu J, Sivashanmugam P. Effect of surfactant assisted sonic pretreatment on liquefaction of fruits and vegetable residue: Characterization, acidogenesis, biomethane yield and energy ratio. BIORESOURCE TECHNOLOGY 2018; 264:35-41. [PMID: 29783129 DOI: 10.1016/j.biortech.2018.05.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/08/2018] [Accepted: 05/09/2018] [Indexed: 06/08/2023]
Abstract
The present study explored the disintegration potential of fruits and vegetable residue through sodium dodecyl sulphate (SDS) assisted sonic pretreatment (SSP). In SSP method, initially the biomass barrier (lignin) was removed using SDS at different dosage, subsequently it was sonically disintegrated. The effect of SSP were assessed based on dissolved organic release (DOR) of fruits and vegetable waste and specific energy input. SSP method achieved higher DOR rate and suspended solids reduction (26% and 16%) at optimum SDS dosage of 0.035 g/g SS with least specific energy input of 5400 kJ/kg TS compared to ultrasonic pretreatment (UP) (16% and 10%). The impact of fermentation and biomethane potential assay revealed highest production of volatile fatty acid and methane yield in SSP (1950 mg/L, 0.6 g/g COD) than UP. The energy ratio obtained was 0.9 for SSP, indicating proposed method is energetically efficient.
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Affiliation(s)
- M Shanthi
- Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India
| | - J Rajesh Banu
- Department of Civil Engineering, Regional Centre for Anna University, Tirunelveli 627 007, India
| | - P Sivashanmugam
- Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India.
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8
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Furmanczyk EM, Kaminski MA, Spolnik G, Sojka M, Danikiewicz W, Dziembowski A, Lipinski L, Sobczak A. Isolation and Characterization of Pseudomonas spp. Strains That Efficiently Decompose Sodium Dodecyl Sulfate. Front Microbiol 2017; 8:1872. [PMID: 29163375 PMCID: PMC5681903 DOI: 10.3389/fmicb.2017.01872] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 09/13/2017] [Indexed: 11/13/2022] Open
Abstract
Due to their particular properties, detergents are widely used in household cleaning products, cosmetics, pharmaceuticals, and in agriculture as adjuvants tailoring the features of pesticides or other crop protection agents. The continuously growing use of these various products means that water soluble detergents have become one of the most problematic groups of pollutants for the aquatic and terrestrial environments. Thus it is important to identify bacteria having the ability to survive in the presence of large quantities of detergent and efficiently decompose it to non-surface active compounds. In this study, we used peaty soil sampled from a surface flow constructed wetland in a wastewater treatment plant to isolate bacteria that degrade sodium dodecyl sulfate (SDS). We identified and initially characterized 36 Pseudomonas spp. strains that varied significantly in their ability to use SDS as their sole carbon source. Five isolates having the closest taxonomic relationship to the Pseudomonas jessenii subgroup appeared to be the most efficient SDS degraders, decomposing from 80 to 100% of the SDS present in an initial concentration 1 g/L in less than 24 h. These isolates exhibited significant differences in degree of SDS degradation, their resistance to high detergent concentration (ranging from 2.5 g/L up to 10 g/L or higher), and in chemotaxis toward SDS on a plate test. Mass spectrometry revealed several SDS degradation products, 1-dodecanol being dominant; however, traces of dodecanal, 2-dodecanol, and 3-dodecanol were also observed, but no dodecanoic acid. Native polyacrylamide gel electrophoresis zymography revealed that all of the selected isolates possessed alkylsulfatase-like activity. Three isolates, AP3_10, AP3_20, and AP3_22, showed a single band on native PAGE zymography, that could be the result of alkylsulfatase activity, whereas for isolates AP3_16 and AP3_19 two bands were observed. Moreover, the AP3_22 strain exhibited a band in presence of both glucose and SDS, whereas in other isolates, the band was visible solely in presence of detergent in the culture medium. This suggests that these microorganisms isolated from peaty soil exhibit exceptional capabilities to survive in, and break down SDS, and they should be considered as a valuable source of biotechnological tools for future bioremediation and industrial applications.
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Affiliation(s)
- Ewa M. Furmanczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Michal A. Kaminski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Grzegorz Spolnik
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Maciej Sojka
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Witold Danikiewicz
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Andrzej Dziembowski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Leszek Lipinski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Adam Sobczak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland
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Ambily PS, Rebello S, Jayachandran K, Jisha MS. A novel three-stage bioreactor for the effective detoxification of sodium dodecyl sulphate from wastewater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:2167-2176. [PMID: 29068346 DOI: 10.2166/wst.2017.389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Anionic surfactants like sodium dodecyl sulphate (SDS), due to its extensive disposal to water bodies cause detrimental effects to the ecosystem. Among the various attempts to reduce the after effects of these toxicants, microbial induced bioremediation serves as a promising strategy. The current study aimed to develop a three stage bioreactor to remediate anionic surfactants in wastewater using effective bacterial isolates. Screening of effective SDS biodegraders led to isolation of Pseudomonas aeruginosa (MTCC 10311). Treatment of synthetic effluent with an immobilized packed bed reactor at a flow rate of 5 mL h-1 resulted in 81 ± 2% SDS eliminations and 70 ± 1% reduction in chemical oxygen demand (COD) in five cycles (6 h per cycle). The hydraulic retention time of the reactor was found to be 6 h. Combinatorial usage of a three stage bioreactor, involving aeration, adsorption with low cost scrap rubber granules and treatment with immobilized Pseudomonas aeruginosa, successfully reduced SDS concentrations and COD of wastewater to 99.8 ± 0.1% and 99 ± 1%, respectively, in 18 h by continuous treatment. Half-life of the three stage bioreactor was 72 h. In addition to reducing the surfactant concentrations, this novel bioreactor could resolve the surfactant associated foaming problems in treatment plants, which make it more unique.
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Affiliation(s)
- P S Ambily
- School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, India E-mail:
| | - Sharrel Rebello
- School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, India E-mail:
| | - K Jayachandran
- School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, India E-mail:
| | - M S Jisha
- School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, India E-mail:
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Barra Caracciolo A, Cardoni M, Pescatore T, Patrolecco L. Characteristics and environmental fate of the anionic surfactant sodium lauryl ether sulphate (SLES) used as the main component in foaming agents for mechanized tunnelling. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 226:94-103. [PMID: 28411499 DOI: 10.1016/j.envpol.2017.04.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/24/2017] [Accepted: 04/03/2017] [Indexed: 06/07/2023]
Abstract
The anionic surfactant sodium lauryl ether sulphate (SLES) is the main component of most commercial products used for soil conditioning in the excavation industry, in particular as lubricants for mechanized tunnelling. Its use during the excavation processes can result in either the subsequent possible re-use of the huge amount of soil debris as by-products (e.g. land covering) or its discharge as waste. Currently, there are neither SLES soil threshold limits in European legislation, nor comprehensive studies on the environmental risk for soil ecosystems in these exposure scenarios. In this context, the present paper reviews the available data on the intrinsic characteristics of persistence and the ecotoxicological effects of the anionic surfactant SLES. Although SLES is generally reported to be biodegradable in standard tests, with degradation rates between 7 h and 30 days, depending on the initial conditions, data on its biodegradation in environmental studies are quite scarce. Consequently, assessing SLES biodegradation rates in field conditions is crucial for evaluating if in residual concentrations (typically in the range 40-500 mg/kg in excavated soils) it can or not be a potential hazard for terrestrial and water organisms. Laboratory ecotoxicological tests pointed out detrimental effects of SLES for aquatic organisms, while data on the terrestrial species are rather poor so far and further studies at the expected environmental concentrations are necessary. Finally, the review reports the main analytical methods available for detecting anionic surfactants in solid matrices and the future research needed to improve knowledge on the possible environmental risks posed by the use of SLES in foaming agents for mechanized tunnelling.
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Affiliation(s)
- Anna Barra Caracciolo
- Water Research Institute, National Research Council (IRSA-CNR), Via Salaria Km 29.300, 00015 Monterotondo Scalo, Rome, Italy
| | - Martina Cardoni
- Water Research Institute, National Research Council (IRSA-CNR), Via Salaria Km 29.300, 00015 Monterotondo Scalo, Rome, Italy
| | - Tanita Pescatore
- Water Research Institute, National Research Council (IRSA-CNR), Via Salaria Km 29.300, 00015 Monterotondo Scalo, Rome, Italy
| | - Luisa Patrolecco
- Water Research Institute, National Research Council (IRSA-CNR), Via Salaria Km 29.300, 00015 Monterotondo Scalo, Rome, Italy.
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11
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Bi D, Xie Y, Tai C, Jiang X, Zhang J, Harrison EM, Jia S, Deng Z, Rajakumar K, Ou HY. A Site-Specific Integrative Plasmid Found in Pseudomonas aeruginosa Clinical Isolate HS87 along with A Plasmid Carrying an Aminoglycoside-Resistant Gene. PLoS One 2016; 11:e0148367. [PMID: 26841043 PMCID: PMC4739549 DOI: 10.1371/journal.pone.0148367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 01/19/2016] [Indexed: 12/30/2022] Open
Abstract
Plasmids play critical roles in bacterial fitness and evolution of Pseudomonas aeruginosa. Here two plasmids found in a drug-resistant P. aeruginosa clinical isolate HS87 were completely sequenced. The pHS87b plasmid (11.2 kb) carries phage-related genes and function-unknown genes. Notably, pHS87b encodes an integrase and has an adjacent tRNAThr-associated attachment site. A corresponding integrated form of pHS87b at the tRNAThr locus was identified on the chromosome of P. aeruginosa, showing that pHS87b is able to site-specifically integrate into the 3’-end of the tRNAThr gene. The pHS87a plasmid (26.8 kb) displays a plastic structure containing a putative replication module, stability factors and a variable region. The RepA of pHS87a shows significant similarity to the replication proteins of pPT23A-family plasmids. pHS87a carries a transposon Tn6049, a truncated insertion sequence ΔIS1071 and a Tn402-like class 1 integron which contains an aacA4 cassette that may confer aminoglycoside resistance. Thus, pHS87b is a site-specific integrative plasmid whereas pHS87a is a plastic antibiotic resistance plasmid. The two native plasmids may promote the fitness and evolution of P. aeruginosa.
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Affiliation(s)
- Dexi Bi
- State Key Laboratory for Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiaotong University, Shanghai, China
| | - Yingzhou Xie
- State Key Laboratory for Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiaotong University, Shanghai, China
| | - Cui Tai
- State Key Laboratory for Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiaotong University, Shanghai, China
| | - Xiaofei Jiang
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jie Zhang
- Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China
| | - Ewan M. Harrison
- Department of Infection, Immunity and Inflammation, University of Leicester, Leicester, United Kingdom
| | - Shiru Jia
- Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China
| | - Zixin Deng
- State Key Laboratory for Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiaotong University, Shanghai, China
| | - Kumar Rajakumar
- Department of Infection, Immunity and Inflammation, University of Leicester, Leicester, United Kingdom
| | - Hong-Yu Ou
- State Key Laboratory for Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiaotong University, Shanghai, China
- * E-mail:
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Rebello S, Joseph BV, Joseph SV, Jose L, Mundayoor S, Jisha MS. Bioconversion of sodium dodecyl sulphate to rhamnolipids by transformed Escherichia coli DH5α cells-a novel strategy for rhamnolipid synthesis. J Appl Microbiol 2015; 120:638-46. [PMID: 26677807 DOI: 10.1111/jam.13032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 11/28/2015] [Accepted: 12/13/2015] [Indexed: 11/29/2022]
Abstract
AIMS Biological synthesis of rhamnolipids from SDS by Pseudomonas aeruginosa S15 is found to be a cost effective mode of rhamnolipid synthesis. This study aimed to attempt rhamnolipid synthesis by transformant Escherichia coli DH5α cells. METHODS AND RESULTS Molecular analysis by curing experiments revealed that the properties of SDS based rhamnolipid synthesis were plasmid borne. Transformation of 10 kb plasmid to E. coli DH5α cells conferred rhamnolipid synthetic ability to transformant. Various genetic elements involved in SDS based rhamnolipid synthesis were analyzed using PCR based and restriction digestion based approaches. PCR amplification using primers specific for sdsA gene encoding alkylsulfatases yielded two significant amplicons viz, 1·2 kb fragment and 422 bp fragment, coding for putative dehydratase and ABC transporter respectively. Amplicon of sdsB gene lacked ability of SDS degradation and rhamnolipid synthesis. Rhamnolipid biosynthesis by transformant E. coli DH5α containing the whole of the 10 kb plasmid, was optimized to yield of 3·38 g l(-1) in 5 days of incubation. CONCLUSIONS Plasmid encoded rhamnolipid synthesis from recombinant E. coli cells is novel and could serve as yet another promising approach among various steps adopted for safe and effective rhamnolipid synthesis. SIGNIFICANCE AND IMPACT OF THE STUDY SDS based rhamnolipid synthesis by S15 attained a high substrate (SDS) to product (Rhamnolipid) conversion ratio. However, the use of Pseudomonas strains is always discouraged as they are opportunistic pathogens and could sometimes turn infectious. Thus, transformation of genetic elements coding SDS based rhamnolipid synthesis to nonpathogenic strains could be promising.
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Affiliation(s)
- S Rebello
- School of Biosciences, Mahatma Gandhi University, Kottayam, India.,UniBiosys Biotech Research Labs, Kalamaserry, India
| | - B V Joseph
- Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India
| | - S V Joseph
- Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India
| | - L Jose
- Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India
| | - S Mundayoor
- Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India
| | - M S Jisha
- School of Biosciences, Mahatma Gandhi University, Kottayam, India
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Toesch M, Schober M, Faber K. Microbial alkyl- and aryl-sulfatases: mechanism, occurrence, screening and stereoselectivities. Appl Microbiol Biotechnol 2014; 98:1485-96. [PMID: 24352732 PMCID: PMC3920027 DOI: 10.1007/s00253-013-5438-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 11/25/2013] [Accepted: 11/26/2013] [Indexed: 01/18/2023]
Abstract
This review gives an overview on the occurrence of sulfatases in Prokaryota, Eukaryota and Archaea. The mechanism of enzymes acting with retention or inversion of configuration during sulfate ester hydrolysis is discussed taking two complementary examples. Methods for the discovery of novel alkyl sulfatases are described by way of sequence-based search and enzyme induction. A comprehensive list of organisms with their respective substrate scope regarding prim- and sec-alkyl sulfate esters allows to assess the capabilities and limitations of various biocatalysts employed as whole cell systems or as purified enzymes with respect to their activities and enantioselectivities. Methods for immobilization and selectivity enhancement by addition of metal ions or organic (co)solvents are summarised.
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Affiliation(s)
- Michael Toesch
- Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - Markus Schober
- Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - Kurt Faber
- Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
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Presence of SDS-degrading enzyme, alkyl sulfatase (SdsA1) is specific to different strains of Pseudomonas aeruginosa. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.02.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Surfactants: Chemistry, Toxicity and Remediation. ENVIRONMENTAL CHEMISTRY FOR A SUSTAINABLE WORLD 2013. [DOI: 10.1007/978-3-319-02387-8_5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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16
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Rebello S, Asok AK, Joseph SV, Joseph BV, Jose L, Mundayoor S, M.S. J. Bioconversion of Sodium Dodecyl Sulphate to Rhamnolipid by Pseudomonas aeruginosa: A Novel and Cost-Effective Production Strategy. Appl Biochem Biotechnol 2012; 169:418-30. [DOI: 10.1007/s12010-012-9988-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 11/16/2012] [Indexed: 11/24/2022]
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