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  • 1.
    Ali, Nurshad
    et al.
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh.
    Hoque, Ashraful
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh.
    Haque, Abedul
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh.
    Abdus Salam, Kazi
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh.
    Karim, Rezaul
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh; Department of Applied Nutrition and Food Technology, Islamic University, Kushtia, Bangladesh.
    Rahman, Aminur
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh.
    Islam, Khairul
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh.
    Alam Saud, Zahangir
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh.
    Khalek, Abdul
    bDepartment of Statistics, Rajshahi University, Rajshahi, Bangladesh.
    Azim Akhand, Anwarul
    Department of Genetic Engineering and Biotechnology, Dhaka University, Dhaka, Bangladesh.
    Hossain, Mostaque
    Department of Medicine, Rajshahi Medical College Hospital, Rajshahi, Bangladesh.
    Mandal, Abul
    School of Life Sciences, University of Skövde, Skövde, Sweden.
    Karim, Rezaul
    Department of Applied Nutrition and Food Technology, Islamic University, Kushtia, Bangladesh.
    Miyataka, Hideki
    Laboratory of Molecular Nutrition and Toxicology, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, Japan.
    Himeno, Seiichiro
    Laboratory of Molecular Nutrition and Toxicology, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, Japan.
    Hossain, Khaled
    Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi, Bangladesh.
    Association between arsenic exposure and plasma cholinesterase activity: a population based study in Bangladesh2010Inngår i: Environmental health, ISSN 1476-069X, E-ISSN 1476-069X, Vol. 9, artikkel-id 36Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background: Arsenic is a potent pollutant that has caused an environmental catastrophe in certain parts of the world including Bangladesh where millions of people are presently at risk due to drinking water contaminated by arsenic. Chronic arsenic exposure has been scientifically shown as a cause for liver damage, cancers, neurological disorders and several other ailments. The relationship between plasma cholinesterase (PChE) activity and arsenic exposure has not yet been clearly documented. However, decreased PChE activity has been found in patients suffering liver dysfunction, heart attack, cancer metastasis and neurotoxicity. Therefore, in this study, we evaluated the PChE activity in individuals exposed to arsenic via drinking water in Bangladesh.

    Methods: A total of 141 Bangladeshi residents living in arsenic endemic areas with the mean arsenic exposure of 14.10 ± 3.27 years were selected as study subjects and split into tertile groups based on three water arsenic concentrations: low (< 129 μg/L), medium (130-264 μg/L) and high (> 265 μg/L). Study subjects were further sub-divided into two groups (≤50 μg/L and > 50 μg/L) based on the recommended upper limit of water arsenic concentration (50 μg/L) in Bangladesh. Blood samples were collected from the study subjects by venipuncture and arsenic concentrations in drinking water, hair and nail samples were measured by Inductively Coupled Plasma Mass Spectroscopy (ICP-MS). PChE activity was assayed by spectrophotometer.

    Results: Arsenic concentrations in hair and nails were positively correlated with the arsenic levels in drinking water. Significant decreases in PChE activity were observed with increasing concentrations of arsenic in water, hair and nails. The average levels of PChE activity in low, medium and high arsenic exposure groups were also significantly different between each group. Lower levels of PChE activity were also observed in the > 50 μg/L group compared to the ≤50 μg/L group. Moreover, PChE activity was significantly decreased in the skin (+) symptoms group compared to those without (-).

    Conclusions: We found a significant inverse relationship between arsenic exposure and PChE activity in a human population in Bangladesh. This research demonstrates a novel exposure-response relationship between arsenic and PChE activity which may explain one of the biological mechanisms through which arsenic exerts its neuro-and hepatotoxicity in humans.

  • 2.
    Islam, Md Shofikul
    et al.
    University of Rajshahi, Bangladesh; Islamic University, Kushtia, Bangladesh.
    Mohanto, Nayan Chandra
    University of Rajshahi, Rajshahi, Bangladesh.
    Karim, Md Rezaul
    Islamic University, Kushtia, Bangladesh.
    Aktar, Sharmin
    University of Rajshahi, Rajshahi, Bangladesh.
    Hoque, Md Mominul
    University of Rajshahi, Rajshahi, Bangladesh.
    Rahman, Atiqur
    University of Rajshahi, Rajshahi, Bangladesh.
    Jahan, Momotaj
    University of Rajshahi, Rajshahi, Bangladesh.
    Khatun, Rabeya
    University of Rajshahi, Rajshahi, Bangladesh.
    Aziz, Abdul
    University of Rajshahi, Rajshahi, Bangladesh.
    Abdus Salam, Kazi
    University of Rajshahi, Rajshahi, Bangladesh; National institutes of Health, Bethesda, USA.
    Saud, Zahangir Alam
    University of Rajshahi, Rajshahi, Bangladesh.
    Hossain, Mostaque
    Kaliganj Upazila Health Complex, Gazipur, Dhaka, Bangladesh.
    Rahman, Aminur
    Systems Biology Research Centre, School of Bioscience, University of Skövde, Skövde, Sweden.
    Mandal, Abul
    Systems Biology Research Centre, School of Bioscience, University of Skövde, Skövde, Sweden.
    Haque, Azizul
    Medical University of South Carolina, Charleston, SC, USA.
    Miyataka, Hideki
    Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Japan.
    Himeno, Seiichiro
    Laboratory of Molecular Nutrition and Toxicology, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Japan.
    Hossain, Khaled
    Department of Biochemistry and Molecular Biology, University of Rajshahi, Bangladesh.
    Elevated concentrations of serum matrix metalloproteinase-2 and -9 and their associations with circulating markers of cardiovascular diseases in chronic arsenic-exposed individuals2015Inngår i: Environmental health, ISSN 1476-069X, E-ISSN 1476-069X, Vol. 14, nr 1, artikkel-id 92Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background: Cardiovascular diseases (CVDs) and cancers are the major causes of chronic arsenic exposure-related morbidity and mortality. Matrix metalloproteinase-2 (MMP-2) and −9 (MMP-9) are deeply involved in the pathogenesis of CVDs and cancers. This study has been designed to evaluate the interactions of arsenic exposure with serum MMP-2 and MMP-9 concentrations especially in relation to the circulating biomarkers of CVDs.

    Methods: A total of 373 human subjects, 265 from arsenic-endemic and 108 from non-endemic areas in Bangladesh were recruited for this study. Arsenic concentrations in the specimens were measured by inductively coupled plasma mass spectroscopy (ICP-MS) and serum MMPs were quantified by immunoassay kits.

    Results: Serum MMP-2 and MMP-9 concentrations in arsenic-endemic population were significantly (p < 0.001) higher than those in non-endemic population. Both MMPs showed significant positive interactions with drinking water (rs = 0.208, p < 0.001 for MMP-2; rs = 0.163, p <0.01 for MMP-9), hair (rs= 0.163, p < 0.01 for MMP-2; rs = 0.173, p < 0.01 for MMP-9) and nail (rs= 0.160, p < 0.01 for MMP-2; rs = 0.182, p < 0.001 for MMP-9) arsenic of the study subjects. MMP-2 concentrations were 1.02, 1.03 and 1.05 times, and MMP-9 concentrations were 1.03, 1.06 and 1.07 times greater for 1 unit increase in log-transformed water, hair and nail arsenic concentrations, respectively, after adjusting for covariates (age, sex, BMI, smoking habit and hypertension). Furthermore, both MMPs were increased dose-dependently when the study subjects were split into three (≤10, 10.1-50 and > 50 μg/L) groups based on the regulatory upper limit of water arsenic concentration set by WHO and Bangladesh Government. MMPs were also found to be significantly (p < 0.05) associated with each other. Finally, the concentrations of both MMPs were correlated with several circulating markers related to CVDs.

    Conclusions: This study showed the significant positive associations and dose–response relationships of arsenic exposure with serum MMP-2 and MMP-9 concentrations. This study also showed the interactions of MMP-2 and MMP-9 concentrations with the circulating markers of CVDs suggesting the MMP-2 and MMP-9 -mediated mechanism of arsenic-induced CVDs.

  • 3.
    Nahar, Noor
    et al.
    School of Biological Sciences, System Biology Research Center, University of Skövde, Skövde, Sweden.
    Rahman, Aminur
    School of Biological Sciences, System Biology Research Center, University of Skövde, Skövde, Sweden.
    Moś, Maria
    Department of Plant Breeding and Seed Science, University of Agriculture in Krakow, Krakow, Poland.
    Warzecha, Tomasz
    Department of Plant Breeding and Seed Science, University of Agriculture in Krakow, Krakow, Poland.
    Ghosh, Sibdas
    School of Arts and Science, Iona College, New Rochelle, USA.
    Hossain, Khaled
    Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi, Bangladesh.
    Nawani, Neelu N.
    Dr. D. Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth University, Pune, India.
    Mandal, Abul
    School of Biological Sciences, System Biology Research Center, University of Skövde, Skövde, Sweden.
    In silico and in vivo studies of molecular structures and mechanisms of AtPCS1 protein involved in binding arsenite and/or cadmium in plant cells2014Inngår i: Journal of Molecular Modeling, ISSN 1610-2940, E-ISSN 0948-5023, Vol. 20, nr 3, artikkel-id 2104Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper reports a continuation of our previous research on the phytochelatin synthase1 (PCS1) gene involved in binding and sequestration of heavy metals or metalloids in plant cells. Construction of a 3D structure of the Arabidopsis thaliana PCS1 protein and prediction of gene function by employing iterative implementation of the threading assembly refinement (I-TASSER) revealed that PC ligands (3GC-gamma-glutamylcysteine) and Gln50, Pro53, Ala54, Tyr55, Cys56, Ile102, Gly161, His162, Phe163, Asp204 and Arg211 residues are essential for formation of chelating complex with cadmium (Cd²⁺) or arsenite (AsIII). This finding suggests that the PCS1 protein might be involved in the production of the enzyme phytochelatin synthase, which might in turn bind, localize, store or sequester heavy metals in plant cells. For validation of the in silico results, we included a T-DNA tagged mutant of Arabidopsis thaliana, SAIL_650_C12, (mutation in AtPCS1 gene) in our investigation. Furthermore, using reverse transcriptase PCR we confirmed that the mutant does not express the AtPCS1 gene. Mutant plants of SAIL_650_C12 were exposed to various amounts of cadmium (Cd²⁺) and arsenite (AsIII) and the accumulation of these toxic metals in the plant cells was quantified spectrophotometrically. The levels of Cd²⁺ and AsIII accumulation in the mutant were approximately 2.8 and 1.6 times higher, respectively, than that observed in the wild-type controlled plants. We confirmed that the results obtained in in silico analyses complement those obtained in in vivo experiments.

  • 4.
    Nahar, Noor
    et al.
    School of Life Sciences, University of Skövde, Skövde, Sweden.
    Rahman, Aminur
    School of Life Sciences, University of Skövde, Skövde, Sweden.
    Mós, Maria
    Department of Plant Breeding and Seed Science, University of Agriculture in Krakow, Krakow, Poland.
    Warzecha, Tomasz
    Department of Plant Breeding and Seed Science, University of Agriculture in Krakow, Krakow, Poland.
    Algerin, Maria
    School of Life Sciences, University of Skövde, Skövde, Sweden.
    Ghosh, Sibdas
    Department of Natural Sciences and Mathematics, Dominican University of California, San Rafael, USA.
    Johnson-Brousseau, Sheila
    Department of Natural Sciences and Mathematics, Dominican University of California, San Rafael, USA.
    Mandal, Abul
    School of Life Sciences, University of Skövde, Skövde, Sweden.
    In silico and in vivo studies of an Arabidopsis thaliana gene, ACR2, putatively involved in arsenic accumulation in plants2012Inngår i: Journal of Molecular Modeling, ISSN 1610-2940, E-ISSN 0948-5023, Vol. 18, nr 9, s. 4249-4262Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Previously, our in silico analyses identified four candidate genes that might be involved in uptake and/or accumulation of arsenics in plants: arsenate reductase 2 (ACR2), phytochelatin synthase 1 (PCS1) and two multi-drug resistant proteins (MRP1 and MRP2) [Lund et al. (2010) J Biol Syst 18:223–224]. We also postulated that one of these four genes, ACR2, seems to play a central role in this process. To investigate further, we have constructed a 3D structure of the Arabidopsis thaliana ACR2 protein using the iterative implementation of the threading assembly refinement (I-TASSER) server. These analyses revealed that, for catalytic metabolism of arsenate, the arsenate binding-loop (AB-loop) and residues Phe-53, Phe-54, Cys-134, Cys-136, Cys-141, Cys-145, and Lys-135 are essential for reducing arsenate to arsenic intermediates (arsenylated enzyme-substrate intermediates) and arsenite in plants. Thus, functional predictions suggest that the ACR2 protein is involved in the conversion of arsenate to arsenite in plant cells. To validate the in silico results, we exposed a transfer-DNA (T-DNA)-tagged mutant of A. thaliana (mutation in the ACR2 gene) to various amounts of arsenic. Reverse transcriptase PCR revealed that the mutant exhibits significantly reduced expression of the ACR2 gene. Spectrophotometric analyses revealed that the amount of accumulated arsenic compounds in this mutant was approximately six times higher than that observed in control plants. The results obtained from in silico analyses are in complete agreement with those obtained in laboratory experiments.

  • 5.
    Nahar, Noor
    et al.
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Rahman, Aminur
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Nawani, Neelu N.
    Microbial Diversity Research Centre, Dr. D. Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth, Tathawade, Pune, India.
    Ghosh, Sibdas
    School of Arts and Science, Iona College, New Rochelle, NY, USA.
    Mandal, Abul
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Phytoremediation of arsenic from the contaminated soil using transgenic tobacco plants expressing ACR2 gene of Arabidopsis thaliana2017Inngår i: Journal of plant physiology (Print), ISSN 0176-1617, E-ISSN 1618-1328, Vol. 218, s. 121-126Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We have cloned, characterized and transformed the AtACR2 gene (arsenic reductase 2) of Arabidopsis thaliana into the genome of tobacco (Nicotiana tabacum, var Sumsun). Our results revealed that the transgenic tobacco plants are more tolerant to arsenic than the wild type ones. These plants can grow on culture medium containing 200μM arsenate, whereas the wild type can barely survive under this condition. Furthermore, when exposed to 100μM arsenate for 35days the amount of arsenic accumulated in the shoots of transgenic plants was significantly lower (28μg/g d wt.) than that found in the shoots of non-transgenic controls (40μg/g d wt.). However, the arsenic content in the roots of transgenic plants was significantly higher (2400μg/g d. wt.) than that (2100μg/g d. wt.) observed in roots of wild type plants. We have demonstrated that Arabidopsis thaliana AtACR2 gene is a potential candidate for genetic engineering of plants to develop new crop cultivars that can be grown on arsenic contaminated fields to reduce arsenic content of the soil and can become a source of food containing no arsenic or exhibiting substantially reduced amount of this metalloid.

  • 6.
    Nahar, Nour
    et al.
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Rahman, Aminur
    Örebro universitet, Institutionen för naturvetenskap och teknik. Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Ghosh, Sibdas
    School of Arts and Science, Iona College, New Rochelle, NY, USA.
    Nawani, Neelu
    Microbial Diversity Research Centre, Dr. D. Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth, Tathawade, Pune, India.
    Mandal, Abul
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Functional studies of AtACR2 gene putatively involved in accumulation, reduction and/or sequestration of arsenic species in plants2017Inngår i: Biologia (Bratislava), ISSN 0006-3088, E-ISSN 1336-9563, Vol. 72, nr 5, s. 520-526Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Food-based exposure to arsenic is a human carcinogen and can severely impact human health resulting in many cancerous diseases and various neurological and vascular disorders. This project is a part of our attempts to develop new varieties of crops for avoiding arsenic contaminated foods. For this purpose, we have previously identified four key genes, and molecular functions of two of these, AtACR2 and AtPCSl, have been studied based on both in silico and in vivo experiments. In the present study, a T-DNA tagged mutant, (SALK-143282C with mutation in AtACR2 gene) of Arabidopsis thaliana was studied for further verification of the function of AtACR2 gene. Semi-quantitative RT-PCR analyses revealed that this mutant exhibits a significantly reduced expression of the AtACR2 gene. When exposed to 100 μM of arsenate (AsV) for three weeks, the mutant plants accumulated arsenic approximately three times higher (778 μg/g d. wt.) than that observed in the control plants (235 μg/g d. wt.). In contrast, when the plants were exposed to 100 μM of arsenite (AsIII), no significant difference in arsenic accumulation was observed between the control and the mutant plants (535 μg/g d. wt. and 498 μg/g d. wt., respectively). Also, when arsenate and arsenite was measured separately either in shoots or roots, significant differences in accumulation of these substances were observed between the mutant and the control plants. These results suggest that AtACR2 gene is involved not only in accumulation of arsenic in plants, but also in conversion of arsenate to arsenite inside the plant cells. © 2017 Institute of Molecular Biology, Slovak Academy of Sciences.

  • 7.
    Nawani, Neelu
    et al.
    Microbial Diversity Research Centre, Dr D Y Patil Biotechnology and Bioinformatics Institute, Dr D Y Patil Vidyapeeth, Pune, India.
    Rahman, Aminur
    System Biology Research Centre, School of Biosciences, University of Skövde, Skövde, Sweden.
    Nahar, Noor
    System Biology Research Centre, School of Biosciences, University of Skövde, Skövde, Sweden.
    Saha, Anandakumar
    Department of Zoology, University of Rajshahi, Bangladesh.
    Kapadnis, Balasaheb
    Department of Microbiology, Savitribai Phule University of Pune, Pune, India.
    Mandal, Abul
    System Biology Research Centre, School of Biosciences, University of Skövde, Skövde, Sweden.
    Status of metal pollution in rivers flowing through urban settlements at Pune and its effect on resident microflora2016Inngår i: Biologia (Bratislava), ISSN 0006-3088, E-ISSN 1336-9563, Vol. 71, nr 5, s. 494-507Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This study illustrates the sporadic distribution of metals in fluvial systems flowing from catchments to urban settlements. This is a detailed study prognosticating the deteriorating quality of rivers at specific locations due to metal pollution. Heavy metals like cadmium, lead, nickel and mercury are prominent in industrial sector. Contour plots derived using spatial and temporal data could determine the focal point of metal pollution and its gradation. Metal values recorded were cadmium 157 mg/L, lead 47 mg/L, nickel 61 mg/L and mercury 0.56 mg/L. Prokaryote diversity was less in polluted water and it harboured metal tolerant bacteria, which were isolated from these polluted sites. Actinomycetes like Streptomyces and several other bacteria like Stenotrophomonas and Pseudomonas isolated from the polluted river sites exhibited changes in morphology in presence of heavy metals. This stress response offered remedial measures as Streptomyces were effective in biosorption of cadmium, nickel and lead and Stenotrophomonas and Pseudomonas were effective in the bioaccumulation of lead and cadmium. The amount of 89 mg of lead and 106 mg of nickel could be adsorbed on one gram of Streptomyces biomass-based biosorbent. Such biological remedies can be further explored to remove metals from polluted sites and from metal contaminated industrial or waste waters.

  • 8.
    Rahman, Aminur
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik. Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Nahar, Noor
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Jass, Jana
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Olsson, Björn
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Mandal, Abul
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Complete genome sequence of Lysinibacillus sphaericus B1-CDA: a bacterium that accumulates arsenics2016Inngår i: Genome Announcements, ISSN 2169-8287, E-ISSN 2169-8287, Vol. 4, nr 1, artikkel-id e00999-15Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Here, we report the genomic sequence and genetic composition of an arsenic resistant bacterium Lysinibacillus sphaericus B1-CDA. Assembly of the sequencing reads revealed that the genome size is ~4.5 Mb encompassing ~80% of the chromosomal DNA.

  • 9.
    Rahman, Aminur
    et al.
    Systems Biology Research Center, University of Skövde, Skövde, Sweden.
    Nahar, Noor
    Systems Biology Research Center, University of Skövde, Skövde, Sweden.
    Nawani, Neelu N.
    Microbial Diversity Research Centre, Dr. D. Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth, Pune, Maharashtra, India.
    Mandal, Abul
    School of Bioscience, Systems Biology Research Center, University of Skövde, Skövde, Sweden.
    Investigation on Arsenic-Accumulating and Arsenic-Transforming Bacteria for Potential Use in the Bioremediation of Arsenics2017Inngår i: Handbook of Metal-Microbe Interactions and Bioremediation / [ed] Surajit Das, Hirak Ranjan Dash, Boca Raton, FL: CRC Press, 2017, s. 509-520Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    In this chapter, arsenic-accumulating and arsenic- transformingbacterial strains that can be employed as a sourcefor cost-effective and eco-friendly bioremediation of arsenicsfrom contaminated environments have been reviewed. Thischapter demonstrates that many naturally occurring bacterialstrains like B1-CDA have the potential for reducing arseniccontent in contaminated sources to safe levels. Therefore,the socioeconomic impact of this kind of microorganisms ishighly significant for those countries, especially in the developingworld, where impoverished families and villages aremost impacted. Therefore, this discovery should be consideredto be the most significant factor in formulating nationalstrategies for effective poverty elimination. Besides humanarsenic contamination, these bacterial strains will also benefitlivestock and native animal species, and the outcome ofthese studies is vital not only for people in arsenic-affectedareas but also for human populations in other countries thathave credible health concerns as a consequence of arseniccontaminatedwater and foods.

  • 10.
    Rahman, Aminur
    et al.
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Nahar, Noor
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Olsson, Björn
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Mandal, Abul
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Complete Genome Sequence of Enterobacter cloacae B2-DHA: a Chromium-Resistant Bacterium2016Inngår i: Genome Announcements, ISSN 2169-8287, E-ISSN 2169-8287, Vol. 4, nr 3, artikkel-id e00483-16Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Previously, we reported a chromium-resistant bacterium, Enterobacter cloacae B2-DHA, isolated from the landfills of tannery industries in Bangladesh. Here, we investigated its genetic composition using massively parallel sequencing and comparative analysis with other known Enterobacter genomes. Assembly of the sequencing reads revealed a genome of ~4.21 Mb in size.

  • 11.
    Rahman, Aminur
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik. Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Olsson, Björn
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Jass, Jana
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Nawani, Neelu
    Microbial Diversity Research Centre, Dr. D.Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth, Tathawade, Pune, India.
    Ghosh, Sibdas
    School of Arts and Science, Iona College, New Rochelle, NY, USA.
    Mandal, Abul
    Systems Biology Research Center, School of Bioscience, University of Skövde, Skövde, Sweden.
    Genome Sequencing Revealed Chromium and Other Heavy Metal Resistance Genes in E. cloacae B2-Dha2017Inngår i: Journal of Microbial & Biochemical Technology, E-ISSN 1948-5948, Vol. 9, nr 5, s. 191-199Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The previously described chromium resistant bacterium, Enterobacter cloacae B2-DHA, was isolated from leather manufacturing tannery landfill in Bangladesh. Here we report the entire genome sequence of this bacterium containing chromium and other heavy metal resistance genes. The genome size and the number of genes, determined by massive parallel sequencing and comparative analysis with other known Enterobacter genomes, are predicted to be 4.22 Mb and 3958, respectively. Nearly 160 of these genes were found to be involved in binding, transport, and catabolism of ions as well as efflux of inorganic and organic compounds. Specifically, the presence of two chromium resistance genes, chrR and chrA was verified by polymerase chain reaction. The outcome of this research highlights the significance of this bacterium in bioremediation of chromium and other toxic metals from the contaminated sources.

  • 12.
    Yewale, Priti Prabhakar
    et al.
    Microbial Diversity Research Centre, Dr. D. Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth, Maharashtra, Pune, India.
    Rahman, Aminur
    Systems Biology Research Center, University of Skövde, Skövde, Sweden.
    Nahar, Noor
    Systems Biology Research Center, University of Skövde, Skövde, Sweden.
    Saha, Anandakumar
    Department of Zoology, University of Rajshahi, Rajshahi, Bangladesh.
    Jass, Jana
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Mandal, Abul
    Systems Biology Research Center, University of Skövde, Skövde, Sweden.
    Nawani, Neelu N.
    Microbial Diversity Research Centre, Dr. D. Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth, Pune, Maharashtra, India.
    Sources of Metal Pollution, Global Status, and Conventional Bioremediation Practices2017Inngår i: Handbook of Metal–Microbe Interactions and Bioremediation / [ed] Surajit Das, Hirak Ranjan Dash, Boca Raton, FL: CRC Press, 2017, s. 25-40Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    Pollution control has become a priority task for global regulatory authorities. The framing of regulations, guidelines, and implementation of pollution awareness and control programs has begun at a massive scale. Heavy metals that are one of the most challenging pollutants that affect humans, animals, plants, and the ecosystem health. The sources of different metals and their toxicities are described. Current approaches in bioremediation are addressed along with the challenges posed by them. Furthermore, recent developments in biotechnology that offer novel ways to recover metals from contaminated sites are discussed.

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