Journal of Microbiology

Journal Articles

In Silico Intensive Analysis for the E4 Gene Evolution of Human Adenovirus Species D: Chanhee Lee, Anyeseu Park, Jeong Yoon Lee; J. Microbiol. 2024;62(5):409-418. Published online April 30, 2024; DOI: https://doi.org/10.1007/s12275-024-00132-1

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Abstract: Adenovirus (Ad) is a ubiquitous pathogen capable of infecting a wide range of animals and humans. Human Adenovirus (HAdV) can cause severe infection, particularly in individuals with compromised immune systems. To date, over 110 types of HAdV have been classified into seven species from A to G, with the majority belonging to the human adenovirus species D (HAdV-D). In the HAdV-D, the most significant factor for the creation of new adenovirus types is homologous recombination between viral genes involved in determining the virus tropism or evading immune system of host cells. The E4 gene, consisting of seven Open Reading Frames (ORFs), plays a role in both the regulation of host cell metabolism and the replication of viral genes. Despite long-term studies, the function of each ORF remains unclear. Based on our updated information, ORF2, ORF3, and ORF4 have been identified as regions with relatively high mutations compared to other ORFs in the E4 gene, through the use of in silico comparative analysis. Additionally, we managed to visualize high mutation sections, previously undetectable at the DNA level, through a powerful amino acid sequence analysis tool known as proteotyping. Our research has revealed the involvement of the E4 gene in the evolution of human adenovirus, and has established accurate sequence information of the E4 gene, laying the groundwork for further research.

Assessment of Cre-lox and CRISPR-Cas9 as tools for recycling of multiple-integrated selection markers in Saccharomyces cerevisiae: Hye Yun Moon† , Gyu Hun Sim† , Hyeon Jin Kim , Keunpil Kim , Hyun Ah Kang; J. Microbiol. 2022;60(1):18-30. Published online December 29, 2021; DOI: https://doi.org/10.1007/s12275-022-1580-7

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We evaluated the Cre-lox and CRISPR-Cas9 systems as markerrecycling tools in Saccharomyces cerevisiae recombinants containing multiple-integrated expression cassettes. As an initial trial, we constructed rDNA-nontranscribed spacer- or Ty4- based multiple integration vectors containing the URA3 marker flanked by the loxP sequence. Integrants harboring multiple copies of tHMG1 and NNV-CP expression cassettes were obtained and subsequently transformed with the Cre plasmid. However, the simultaneous pop-out of the expression cassettes along with the URA3 marker hampered the use of Cre-lox as a marker-recycling tool in multiple integrants. As an alternative, we constructed a set of CRISPR-Cas9-gRNA vectors containing gRNA targeted to auxotrophic marker genes. Transformation of multiple integrants of tHMG1 and NNV-CP cassettes by the Cas9-gRNA vector in the presence of the URA3 (stop) donor DNA fragments generated the Ura- transformants retaining multiple copies of the expression cassettes. CRISPR-Cas9-based inactivation led to the recycling of the other markers, HIS3, LEU2, and TRP1, without loss of expression cassettes in the recombinants containing multiple copies of tHMG1, NNV-CP, and SfBGL1 cassettes, respectively. Reuse of the same selection marker in marker-inactivated S. cerevisiae was validated by multiple integrations of the TrEGL2 cassette into the S. cerevisiae strain expressing SfBGL1. These results demonstrate that introducing stop codons into selection marker genes using the CRISPR-Cas9 system with donor DNA fragments is an efficient strategy for markerrecycling in multiple integrants. In particular, the continual reuse of auxotrophic markers would facilitate the construction of a yeast cell factory containing multiple copies of expression cassettes without antibiotic resistance genes.

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Multiple metabolic engineering of Saccharomyces cerevisiae for the production of lycopene
Jiaheng Liu, Minxia Song, Xianhao Xu, Yaokang Wu, Yanfeng Liu, Guocheng Du, Jianghua Li, Long Liu, Xueqin Lv
Food Bioengineering.2024;[Epub] CrossRef
Biochemical and Biorefinery Platform for Second-Generation Bioethanol: Fermentative Strategies and Microorganisms
Karla D. González-Gloria, Elia Tomás-Pejó, Lorena Amaya-Delgado, Rosa M. Rodríguez-Jasso, Araceli Loredo-Treviño, Anusuiya Singh, Meenu Hans, Carlos Martín, Sachin Kumar, Héctor A. Ruiz
Fermentation.2024; 10(7): 361. CrossRef
CRISPR/Cas9-based toolkit for rapid marker recycling and combinatorial libraries in Komagataella phaffii
Wei Zhou, Yuanyi Li, Guosong Liu, Weichuang Qin, Dongzhi Wei, Fengqing Wang, Bei Gao
Applied Microbiology and Biotechnology.2024;[Epub] CrossRef
Establishment, optimization, and application of genetic technology in Aspergillus spp.
Jing Gao, Huiqing Liu, Zhenzhen Zhang, Zhihong Liang
Frontiers in Microbiology.2023;[Epub] CrossRef
CRISPR-Cas Technology for Bioengineering Conventional and Non-Conventional Yeasts: Progress and New Challenges
Yuanyuan Xia, Yujie Li, Wei Shen, Haiquan Yang, Xianzhong Chen
International Journal of Molecular Sciences.2023; 24(20): 15310. CrossRef
Genomic and functional features of yeast species in Korean traditional fermented alcoholic beverage and soybean products
Da Min Jeong, Hyeon Jin Kim, Min-Seung Jeon, Su Jin Yoo, Hye Yun Moon, Eun-joo Jeon, Che Ok Jeon, Seong-il Eyun, Hyun Ah Kang
FEMS Yeast Research.2023;[Epub] CrossRef
Multiplex genome editing to construct cellulase engineered Saccharomyces cerevisiae for ethanol production from cellulosic biomass
Yatika Dixit, Preeti Yadav, Arun Kumar Sharma, Poornima Pandey, Arindam Kuila
Renewable and Sustainable Energy Reviews.2023; 187: 113772. CrossRef

Similarities and differences between 6S RNAs from Bradyrhizobium japonicum and Sinorhizobium meliloti: Olga Y. Burenina , Daria A. Elkina , Anzhela Y. Migur , Tatiana S. Oretskaya , Elena Evguenieva-Hackenberg , RolK. Hartmann , Elena A. Kubareva; J. Microbiol. 2020;58(11):945-956. Published online October 30, 2020; DOI: https://doi.org/10.1007/s12275-020-0283-1

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Abstract

6S RNA, a conserved and abundant small non-coding RNA found in most bacteria, regulates gene expression by inhibiting RNA polymerase (RNAP) holoenzyme. 6S RNAs from α-proteobacteria have been studied poorly so far. Here, we present a first in-depth analysis of 6S RNAs from two α-proteobacteria species, Bradyrhizobium japonicum and Sinorhizobium meliloti. Although both belong to the order Rhizobiales and are typical nitrogen-fixing symbionts of legumes, their 6S RNA expression profiles were found to differ: B. japonicum 6S RNA accumulated in the stationary phase, thus being reminiscent of Escherichia coli 6S RNA, whereas S. meliloti 6S RNA level peaked at the transition to the stationary phase, similarly to Rhodobacter sphaeroides 6S RNA. We demonstrated in vitro that both RNAs have hallmarks of 6S RNAs: they bind to the σ70-type RNAP holoenzyme and serve as templates for de novo transcription of so-called product RNAs (pRNAs) ranging in length from ~13 to 24 nucleotides, with further evidence of the synthesis of even longer pRNAs. Likewise, stably bound pRNAs were found to rearrange the 6S RNA structure to induce its dissociation from RNAP. Compared with B. japonicum 6S RNA, considerable conformational heterogeneity was observed for S. meliloti 6S RNA and its complexes with pRNAs, even though the two 6S RNAs share ~75% sequence identity. Overall, our findings suggest that the two rhizobial 6S RNAs have diverged with respect to their regulatory impact on gene expression throughout the bacterial life cycle.

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Bacteria Adaptation Mechanisms to Stress Conditions with Small Non-Coding RNAs Participation
A. S. Karpov, D. A. Elkina, T. S. Oretskaya, E. A. Kubareva
Биоорганическая химия.2023; 49(6): 555. CrossRef
Bacterial Adaptation Mechanisms to Stress Conditions with Small Non-Coding RNAs Participation (A Review)
A. S. Karpov, D. A. Elkina, T. S. Oretskaya, E. A. Kubareva
Russian Journal of Bioorganic Chemistry.2023; 49(6): 1198. CrossRef
Structural and Functional Insight into the Mechanism of Bacillus subtilis 6S-1 RNA Release from RNA Polymerase
Sweetha Ganapathy, Philipp G. Hoch, Marcus Lechner, Malte Bussiek, Roland K. Hartmann
Non-Coding RNA.2022; 8(1): 20. CrossRef
Involvement of E. coli 6S RNA in Oxidative Stress Response
Olga Y. Burenina, Daria A. Elkina, Anna Ovcharenko, Valeria A. Bannikova, M. Amri C. Schlüter, Tatiana S. Oretskaya, Roland K. Hartmann, Elena A. Kubareva
International Journal of Molecular Sciences.2022; 23(7): 3653. CrossRef
Ms1 RNA Interacts With the RNA Polymerase Core in Streptomyces coelicolor and Was Identified in Majority of Actinobacteria Using a Linguistic Gene Synteny Search
Viola Vaňková Hausnerová, Olga Marvalová, Michaela Šiková, Mahmoud Shoman, Jarmila Havelková, Milada Kambová, Martina Janoušková, Dilip Kumar, Petr Halada, Marek Schwarz, Libor Krásný, Jarmila Hnilicová, Josef Pánek
Frontiers in Microbiology.2022;[Epub] CrossRef
Detection of Small Products of Transcription from 6S RNA (pRNA) by “Mirror-Like” Northern Blot Hybridization
O. Y. Burenina, T. S. Oretskaya, E. A. Kubareva
Russian Journal of Bioorganic Chemistry.2021; 47(2): 478. CrossRef

Promising cellulolytic fungi isolates for rice straw degradation: Diana Catalina Pedraza-Zapata , Andrea Melissa Sánchez-Garibello , Balkys Quevedo-Hidalgo , Nubia Moreno-Sarmiento , Ivonne Gutiérrez-Rojas; J. Microbiol. 2017;55(9):711-719. Published online September 2, 2017; DOI: https://doi.org/10.1007/s12275-017-6282-1

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Abstract

The objective of this study was to evaluate the potential of eight fungal isolates obtained from soils in rice crops for straw degradation in situ. From the initial eight isolates, Pleurotus ostreatus T1.1 and Penicillium sp. HC1 were selected for further characterization based on qualitative cellulolytic enzyme production and capacity to use rice straw as a sole carbon source. Subsequently, cellulolytic, xylanolytic, and lignolytic (Pleurotus ostreatus) activity on carboxymethyl cellulose, oat xylan, and rice straw with different nitrogen sources was evaluated. From the results obtained it was concluded both isolates are capable to produce enzymes necessary for rice straw degradation. However, their production is dependent upon carbon and nitrogen source. Last, it was established that Pleurotus ostreatus T1.1 and Penicillium sp. HC1 capability to colonize and mineralize rice straw, in mono-and co-culture, without affecting nitrogen soil content.

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Unravelling of cellulolytic fungal consortium from humus soil for efficient lignocellulosic waste degradation
H.K. Narendra Kumar, N. Chandra Mohana, Jayarama Reddy, M.R. Abhilash, S. Satish
The Microbe.2024; 5: 100183. CrossRef
Sustainability in residue management: a review with special reference to Indian agriculture
Meenakshi Verma, Pooja Singh, Manikprabhu Dhanorkar
Paddy and Water Environment.2024; 22(1): 1. CrossRef
Crop residue heterogeneity: Decomposition by potential indigenous ligno-cellulolytic microbes and enzymatic profiling
Sandeep Sharma, Kailash Chand Kumawat, Paawan Kaur, Sukhjinder Kaur, Nihar Gupta
Current Research in Microbial Sciences.2024; 6: 100227. CrossRef
Recent developments in microbial degradation of crop residues: a comprehensive review
K. S. Sruthy, S. Puranik, V. Kumar, A. Kaushik, K. V. Vikram, M. Manoj, L. Shukla, S. K. Singh, A. Kumar
International Journal of Environmental Science and Technology.2024;[Epub] CrossRef
Fungal Saprotrophic Promotion and Plant Pathogenic Suppression under Ditch-Buried Straw Return with Appropriate Burial Amount and Depth
Jie Zhou, Yanling Li, Jiawen Lou, Yuekai Wang, Zhengrong Kan, Reinhard W. Neugschwandtner, Fengmin Li, Jian Liu, Ke Dong, Yaguang Xue, Haishui Yang, Lingling Shi
Plants.2024; 13(13): 1738. CrossRef
Rice crop residue management by the microbial consortium for rapid decomposition of straw
Kunvar Gyanendra Kumar, Raja Husain, Anurag Mishra, Nitin Vikram, Devendra Kumar Dwivedi, Saurabh Pandey, Ashutosh Singh
3 Biotech.2024;[Epub] CrossRef
Highly variable domain architecture in carbohydrate-active enzymes highlights Streptomyces as promising resource for rice straw bioconversion
Andika Sidar, Gerben P. Voshol, Ahmed El-Masoudi, Erik Vijgenboom, Peter J. Punt
Bioresource Technology Reports.2024; 25: 101775. CrossRef
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Shir Nee Ong, Chin Mei Lee
Malaysian Applied Biology.2023; 52(4): 1. CrossRef
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Yao Jiang, Xinyue Du, Qianqian Xu, Chunhua Yin, Haiyang Zhang, Yang Liu, Xiaolu Liu, Hai Yan
Microorganisms.2023; 11(9): 2148. CrossRef
Tomato plant extract (Lycopersicon esculentum) obtained from agroindustrial byproducts and its antifungal activity against Fusarium spp.
Luis M. Isidro-Requejo, Enrique Márquez-Ríos, Carmen L. Del Toro-Sánchez, Saúl Ruiz-Cruz, Daniel Valero-Garrido, Guadalupe M. Suárez-Jiménez
Frontiers in Sustainable Food Systems.2023;[Epub] CrossRef
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Esteban Amador Morilla, Antonela Taddia, Maximiliano Sortino, Gisela Tubio
BioEnergy Research.2023; 16(4): 2285. CrossRef
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Qianxi Li, Siyu Wang, Senmiao Chen, Yini Shang, Fangmei Zhou, Jie Yu, Zhishan Ding, Xiaoqing Ye
Journal of Plant Pathology.2022; 105(1): 57. CrossRef
Degradation of lignocelluloses in straw using AC-1, a thermophilic composite microbial system
Hongdou Liu, Liqiang Zhang, Yu Sun, Guangbo Xu, Weidong Wang, Renzhe Piao, Zongjun Cui, Hongyan Zhao
PeerJ.2021; 9: e12364. CrossRef
Wheat straw hydrolysis by using co-cultures of Trichoderma reesei and Monascus purpureus toward enhanced biodegradation of the lignocellulosic biomass in bioethanol biorefinery
Shabih Fatma, Aimen Saleem, Romana Tabassum
Biomass Conversion and Biorefinery.2021; 11(3): 743. CrossRef
WITHDRAWN: Paddy straw procurement challenges and its effect on cost of power generation
Manjeet Singh, Yadwinder Singh Brar, Harpuneet Singh
Materials Today: Proceedings.2021;[Epub] CrossRef
Control biológico: Camino a la agricultura moderna
Diana Marcela Vinchira-Villarraga, Nubia Moreno-Sarmiento
Revista Colombiana de Biotecnología.2019; 21(1): 2. CrossRef
Characterization of an Anaerobic, Thermophilic, Alkaliphilic, High Lignocellulosic Biomass-Degrading Bacterial Community, ISHI-3, Isolated from Biocompost
Ayumi Shikata, Junjarus Sermsathanaswadi, Phakhinee Thianheng, Sirilak Baramee, Chakrit Tachaapaikoon, Rattiya Waeonukul, Patthra Pason, Khanok Ratanakhanokchai, Akihiko Kosugi
Enzyme and Microbial Technology.2018; 118: 66. CrossRef

Optimization of Enterobacter cloacae (KU923381) for diesel oil degradation using Response Surface Methodology (RSM): Sugumar Ramasamy , Arumugam Arumugam , Preethy Chandran; J. Microbiol. 2017;55(2):104-111. Published online January 26, 2017; DOI: https://doi.org/10.1007/s12275-017-6265-2

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Abstract

Efficiency of Enterobacter cloacae KU923381 isolated from petroleum hydrocarbon contaminated soil was evaluated in batch culture and bioreactor mode. The isolate were screened for biofilm formation using qualitative and quantitative assays. Response surface methodology (RSM) was used to study the effect of pH, temperature, glucose concentration, and sodium chloride on diesel degradation. The predicted values for diesel oil degradation efficiency by the statistical designs are in a close agreement with experimental data (R2 = 99.66%). Degradation efficiency is increased by 36.78% at pH = 7, temperature = 35°C, glucose = 5%, and sodium chloride concentration = 5%. Under the optimized conditions, the experiments were performed for diesel oil degradation by gas chromatographic mass spectrometric analysis (GC-MS). GC-MS analysis confirmed that E. cloacae had highly degrade hexadecane, heptadecane, tridecane, and docosane by 99.71%, 99.23%, 99.66%, and 98.34% respectively. This study shows that rapid bioremoval of hydrocarbons in diesel oil is acheived by E. cloacae with abet of biofilm formation. The potential use of the biofilms for preparing trickling filters (gravel particles) for the degradation of hydrocarbons from petroleum wastes before their disposal in the open environment is highly suggested. This is the first successful attempt for artificially establishing petroleum hydrocarbon degrading bacterial biofilm on solid substrates in bioreactor.

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Application of Response Surface Methodology for Rapid Chrysene Biodegradation by Newly Isolated Marine-derived Fungus Cochliobolus lunatus Strain CHR4D: Jwalant K. Bhatt , Chirag M. Ghevariya , Dushyant R. Dudhagara , Rahul K. Rajpara , Bharti P. Dave; J. Microbiol. 2014;52(11):908-917. Published online October 31, 2014; DOI: https://doi.org/10.1007/s12275-014-4137-6

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Abstract

For the first time, Cochliobolus lunatus strain CHR4D, a marine-derived ascomycete fungus isolated from historically contaminated crude oil polluted shoreline of Alang-Sosiya ship-breaking yard, at Bhavnagar coast, Gujarat has been reported showing the rapid and enhanced biodegradation of chrysene, a four ringed high molecular weight (HMW) polycyclic aromatic hydrocarbon (PAH). Mineral Salt Broth (MSB) components such as ammonium tartrate and glucose along with chrysene, pH and trace metal solution have been successfully optimized by Response Surface Methodology (RSM) using central composite design (CCD). A validated, two-step optimization protocol has yielded a substantial 93.10% chrysene degradation on the 4th day, against unoptimized 56.37% degradation on the 14th day. The results depict 1.65 fold increase in chrysene degradation and 1.40 fold increase in biomass with a considerable decrement in time. Based on the successful laboratory experiments, C. lunatus strain CHR4D can thus be predicted as a potential candidate for mycoremediation of HMW PAHs impacted environments.

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Oil-Spill Triggered Shift in Indigenous Microbial Structure and Functional Dynamics in Different Marine Environmental Matrices
C. S. Neethu, C. Saravanakumar, R. Purvaja, R. S. Robin, R. Ramesh
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Louis Bengyella, Sehrish Iftikhar, Kiran Nawaz, Dobgima J. Fonmboh, Elsie L. Yekwa, Robinson C. Jones, Yiboh M. T. Njanu, Pranab Roy
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Biodegradation of anthracene and several PAHs by the marine-derived fungus Cladosporium sp. CBMAI 1237
Willian G. Birolli, Darlisson de A. Santos, Natália Alvarenga, Anuska C.F.S. Garcia, Luciane P.C. Romão, André L.M. Porto
Marine Pollution Bulletin.2018; 129(2): 525. CrossRef
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Research Support, Non-U.S. Gov'ts

Biodegradation of C5-C8 Fatty Acids and Production of Aroma Volatiles by Myroides sp. ZB35 Isolated from Activated Sludge: Zijun Xiao , Xiankun Zhu , Lijun Xi , Xiaoyuan Hou , Li Fang , Jian R. Lu; J. Microbiol. 2014;52(5):407-412. Published online May 9, 2014; DOI: https://doi.org/10.1007/s12275-014-4109-x

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Abstract

In the effluents of a biologically treated wastewater from a heavy oil-refining plant, C5-C8 fatty acids including penta-noic acid, hexanoic acid, heptanoic acid, octanoic acid, and 2-methylbutanoic acid are often detected. As these residual fatty acids can cause further air and water pollution, a new Myroides isolate ZB35 from activated sludge was explored to degrade these C5-C8 fatty acids in this study. It was found that the biodegradation process involved a lag phase that became prolonged with increasing acyl chain length when the fatty acids were individually fed to this strain. However, when fed as a mixture, the ones with longer acyl chains were found to become more quickly assimilated. The branched 2- methylbutanoic acid was always the last one to be depleted among the five fatty acids under both conditions. Metabolite analysis revealed one possible origin of short chain fatty acids in the biologically treated wastewater. Aroma volatiles inclu-ding 2-methylbutyl isovalerate, isoamyl 2-methylbutanoate, isoamyl isovalerate, and 2-methylbutyl 2-methylbutanoate were subsequently identified from ZB35 extracts, linking the source of the fruity odor to these esters excreted by Myroides species. To our best knowledge, this is the first finding of these aroma esters in bacteria. From a biotechnological viewpoint, this study has revealed the potential of Myroides species as a promising source of aroma esters attractive for food and fragrance industries.

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Onyedikachi Ubani, Harrison Ifeanyichukwu Atagana
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Molecular Characterization of the Alpha Subunit of Multicomponent Phenol Hydroxylase from 4-Chlorophenol-Degrading Pseudomonas sp. Strain PT3: Wael S. El-Sayed , Mohamed K. Ibrahim , Salama A. Ouf; J. Microbiol. 2014;52(1):13-19. Published online January 4, 2014; DOI: https://doi.org/10.1007/s12275-014-3250-x

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Abstract

Multicomponent phenol hydroxylases (mPHs) are diiron enzymes that use molecular oxygen to hydroxylate a variety of phenolic compounds. The DNA sequence of the alpha subunit (large subunit) of mPH from 4-chlorophenol (4-CP)- degrading bacterial strain PT3 was determined. Strain PT3 was isolated from oil-contaminated soil samples adjacent to automobile workshops and oil stations after enrichment and establishment of a chlorophenol-degrading consortium. Strain PT3 was identified as a member of Pseudomonas sp. based on sequence analysis of the 16S rRNA gene fragment. The 4-CP catabolic pathway by strain PT3 was tentatively proposed to proceed via a meta-cleavage pathway after hydroxylation to the corresponding chlorocatechol. This hypothesis was supported by polymerase chain reaction (PCR) detection of the LmPH encoding sequence and UV/VIS spectrophotometric analysis of the culture filtrate showing accumulation of 5-chloro-2-hydroxymuconic semialdehyde (5-CHMS) with λmax 380. The detection of catabolic genes involved in 4-CP degradation by PCR showed the presence of both mPH and catechol 2,3-dioxygenase (C23DO). Nucleotide sequence analysis of the alpha subunit of mPH from strain PT3 revealed specific phylogenetic grouping to known mPH. The metal coordination encoding regions from strain PT3 were found to be conserved with those from the homologous dinuclear oxo-iron bacterial monooxygenases. Two DE(D)XRH motifs was detected in LmPH of strain PT3 within an approximate 100 amino acid interval, a typical arrangement characteristic of most known PHs.

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An investigation of soil and groundwater metagenomes for genes encoding soluble and particulate methane monooxygenase, toluene-4-monoxygenase, propane monooxygenase and phenol hydroxylase
Alison M. Cupples, Hongyu Dang, Katy Foss, Anat Bernstein, Jean-Rene Thelusmond
Archives of Microbiology.2024;[Epub] CrossRef
Functionality, characterization and DEGs contribution by engineering isolate Pseudomonas P1 to elucidate the regulation mechanisms of p-chlorophenol-4-Chloroaniline bioremediation
Shuo Sun, Yaru Wang, Shuiquan Chen, Zhenhai Li, Chaocheng Zhao, Qiyou Liu, Xiuxia Zhang
Chemical Engineering Journal.2023; 468: 143798. CrossRef
Challenges and opportunities for the biodegradation of chlorophenols: Aerobic, anaerobic and bioelectrochemical processes
Kaichao Yang, Yingxin Zhao, Min Ji, Zhiling Li, Siyuan Zhai, Xu Zhou, Qian Wang, Can Wang, Bin Liang
Water Research.2021; 193: 116862. CrossRef
Metabolic profile analysis and kinetics of p-cresol biodegradation by an indigenous Pseudomonas citronellolis NS1 isolated from coke oven wastewater
Namita Panigrahy, Manas Barik, Rajesh Kumar Sahoo, Naresh Kumar Sahoo
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Phenol hydroxylase from Pseudomonas sp. KZNSA: Purification, characterization and prediction of three-dimensional structure
Boitumelo Setlhare, Ajit Kumar, Mduduzi P. Mokoena, Bala Pillay, Ademola O. Olaniran
International Journal of Biological Macromolecules.2020; 146: 1000. CrossRef
Characterization and biodegradation potential of an aniline-degrading strain of Pseudomonas JA1 at low temperature
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Journal Article

Comparative Study of Olive Oil Mill Wastewater Treatment Using Free and Immobilized Coriolopsis polyzona and Pycnoporus coccineus: Mohamed Neifar , Atef Jaouani , María Jesús Martínez , Michel J. Penninckx; J. Microbiol. 2012;50(5):746-753. Published online November 4, 2012; DOI: https://doi.org/10.1007/s12275-012-2079-4

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Abstract: The efficiency of the two white-rot fungi Pycnoporus coccineus and Coriolopsis polyzona in the Olive Oil Mill Wastewater (OOMW) treatment was investigated. Both fungi were active in the decolourisation and COD removal of OOMW at 50 g/L COD, but only the first fungus remains effective on the crude effluent (COD=100 g/L). Moreover P. coccineus was less affected by oxygen supplementation and exhibited a high tolerance to agitation in comparison to C. polyzona. However, it required a nitrogen supplementation to obtain faster and higher COD removal. To overcome the negative effect of agitation on fungi growth and efficiency, immobilisation of C. polyzona and P. coccineus in polyurethane foam was applied. The immobilized system showed better COD decreases during three consecutive batches without remarkable loss of performances. The results obtained in this study suggested that immobilized C. polyzona and especially immobilized P. coccineus might be applicable to a large scale for the removal colour and COD of OOMW.

Research Support, Non-U.S. Gov'ts

Molecular Characterization of Chloranilic Acid Degradation in Pseudomonas putida TQ07: Luis G. Treviño-Quintanilla , Julio A. Freyre-González , Rosa A. Guillén-Garcés , Clarita Olvera; J. Microbiol. 2011;49(6):974-980. Published online December 28, 2011; DOI: https://doi.org/10.1007/s12275-011-1507-1

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Abstract: Pentachlorophenol is the most toxic and recalcitrant chlorophenol because both aspects are directly proportional to the halogenation degree. Biological and abiotic pentachlorophenol degradation generates p-chloranil, which in neutral to lightly alkaline environmental conditions is hydrolyzed to chloranilic acid that present a violet-reddish coloration in aqueous solution. Several genes of the degradation pathway, cadR-cadCDX, as well as other uncharacterized genes (ORF5 and 6), were isolated from a chloranilic acid degrading bacterium, Pseudomonas putida strain TQ07. The disruption by random mutagenesis of the cadR and cadC genes in TQ07 resulted in a growth deficiency in the presence of chloranilic acid, indicating that these genes are essential for TQ07 growth with chloranilic acid as the sole carbon source. Complementation assays demonstrated that a transposon insertion in mutant CAD82 (cadC) had a polar effect on other genes contained in cosmid pLG3562. These results suggest that at least one of these genes, cadD and cadX, also takes part in chloranilic acid degradation. Based on molecular modeling and function prediction, we strongly suggest that CadC is a pyrone dicarboxylic acid hydrolase and CadD is an aldolase enzyme like dihydrodipicolinate synthase. The results of this study allowed us to propose a novel pathway that offers hypotheses on chloranilic acid degradation (an abiotic by-product of pentachlorophenol) by means of a very clear phenotype that is narrowly related to the capability of Pseudomonas putida strain TQ07 to degrade this benzoquinone.

Isolation and Characterization of Ethylbenzene Degrading Pseudomonas putida E41: Lan-Hee Kim , Sang-Seob Lee; J. Microbiol. 2011;49(4):575-584. Published online September 2, 2011; DOI: https://doi.org/10.1007/s12275-011-0399-4

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Abstract: Pseudomonas putida E41 was isolated from oil-contaminated soil and showed its ability to grow on ethylbenzene as the sole carbon and energy source. Moreover, P. putida E41 show the activity of biodegradation of ethylbenzene in the batch culture. E41 showed high efficiency of biodegradation of ethylbenzene with the optimum conditions (a cell concentration of 0.1 g wet cell weight/L, pH 7.0, 25°C, and ethylbenzene concentration of 50 mg/L) from the results of the batch culture. The maximum degradation rate and specific growth rate (μmax) under the optimum conditions were 0.19±0.03 mg/mg-DCW (Dry Cell Weight)/h and 0.87±0.13 h-1, respectively. Benzene, toluene and ethylbenzene were degraded when these compounds were provided together; however, xylene isomers persisted during degradation by P. putida E41. When using a bioreactor batch system with a binary culture with P. putida BJ10, which was isolated previously in our lab, the degradation rate for benzene and toluene was improved in BTE mixed medium (each initial concentration: 50 mg/L). Almost all of the BTE was degraded within 4 h and 70-80% of m-, p-, and o-xylenes within 11 h in a BTEX mixture (initial concentration: 50 mg/L each). In summary, we found a valuable new strain of P. putida, determined the optimal degradation conditions for this isolate and tested a mixed culture of E41 and BJ10 for its ability to degrade a common sample of mixed contaminants containing benzene, toluene, and xylene.

Acinetobacter oleivorans sp. nov. Is Capable of Adhering to and Growing on Diesel-Oil: Yoon-Suk Kang , Jaejoon Jung , Che Ok Jeon , Woojun Park; J. Microbiol. 2011;49(1):29-34. Published online March 3, 2011; DOI: https://doi.org/10.1007/s12275-011-0315-y

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57 Scopus

Abstract: A diesel-oil and n-hexadecane-degrading novel bacterial strain, designated DR1T, was isolated from a rice paddy in Deok-So, South Korea. The strain DR1T cells were Gram-negative, aerobic coccobacilli, and grew at 20-37°C with the optimal temperature of 30°C, and an optimal pH of 6-8. Interestingly, strain DR1T was highly motile (swimming and swarming motility) using its fimbriae, and generated N-acyl homoserine lactones as quorum-sensing signals. The predominant respiratory quinone as identified as ubiquinone-9 (Q-9) and DNA G+C content was 41.4 mol%. Comparative 16S rRNA gene sequence-based phylogenetic analysis placed the strain in a clade with the species A. calcoaceticus, A. haemolyticus, A. baumannii, A. baylyi, and A. beijerinckii, with which it evidenced sequence similarities of 98.2%, 97.4%, 97.2%, 97.1%, and 97.0%, respectively. DNA-DNA hybridization values between strain DR1T and other Acinetobacter spp. were all less than 20%. The physiological and taxonomic characteristics with the DNA-DNA hybridization data supported the identification of strain DR1T in the genus Acinetobacter as a novel species, for which the name Acinetobacter oleivorans sp. nov. is proposed. The type strain is DR1T (=KCTC 23045T =JCM 16667T).

Effect of Fungal Pellet Morphology on Enzyme Activities Involved in Phthalate Degradation: Young-Mi Kim , Hong-Gyu Song; J. Microbiol. 2009;47(4):420-424. Published online September 9, 2009; DOI: https://doi.org/10.1007/s12275-009-0051-8

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Abstract: Pellet size of white rot fungus, Pleurotus ostreatus may affect the secretion of its degradative enzymes and accompanying biodegrading capability, but could be controlled by several physical culture conditions in liquid culture. The pellet size of P. ostreatus was affected by the volume of inoculum, flask, and medium, but the agitation speed was the most important control factor. At the lower agitation speed of 100 rpm, the large pellets were formed and the laccase activity was higher than that of small pelleted culture at 150 rpm, which might be due to loose intrapellet structure. However, the biodegradation rates of benzylbutylphthalate and dimethylphthalate were higher in the small pelleted culture, which indicated the involvement of other degradative enzyme rather than laccase. The activity of esterase which catalyzes the nonphenolic compounds before the reaction of ligninolytic enzymes was higher in the small pelleted culture, and coincided with the degradation pattern of phthalates. This study suggests the optimization of pellet morphology and subsequent secretion of degradative enzymes is necessary for the efficient removal of recalcitrants by white rot fungi.

Journal Article

Monitoring Nutrient Impact on Bacterial Community Composition during Bioremediation of Anoxic PAH-Contaminated Sediment: Myungsu Kim , Seung Seob Bae , Mijin Seol , Jung-Hyun Lee , Young-Sook Oh; J. Microbiol. 2008;46(6):615-623. Published online December 24, 2008; DOI: https://doi.org/10.1007/s12275-008-0097-z

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Abstract

Marine harbor sediments are frequently polluted with significant amount of polycyclic aromatic hydrocarbons (PAHs) some of which are naturally toxic, recalcitrant, mutagenic, and carcinogenic. To stimulate biodegradation of PAHs in PAH-contaminated sediments collected from near Gwangyang Bay, Korea, lactate was chosen as a supplementary carbonaceous substrate. Sediment packed into 600 ml air-tight jar was either under no treatment condition or lactate amended condition (1%, w/v). Microbial community composition was monitored by bacteria-specific and archaea-specific PCR-terminal restriction fragment length polymorphism (T-RFLP), in addition to measuring the residual PAH concentration. Results showed that lactate amendment enhanced biodegradation rate of PAHs in the sediment by 4 to 8 times, and caused a significant shift in archaebacterial community in terms of structure and diversity with time. Phylogenetic analysis of 23 archaeal clones with distinctive RFLP patterns among 288 archaeal clones indicated that majority of the archaeal members were closest to unculturable environmental rDNA clones from hydrocarbon-contaminated and/or methanogenesis-bearing sediments. Lactate amendment led to the enrichment of some clones that were most closely related to PAH-degrading Methanosarcina species. These results suggest a possible contribution of methanogenic community to PAH degradation and give us more insights on how to effectively remediate PAH-contaminated sediments.

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Application of in situ Solid-Phase Microextraction on Mediterranean Sponges for Untargeted Exometabolome Screening and Environmental Monitoring
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Effects of polycyclic aromatic hydrocarbons on microbial community structure and PAH ring hydroxylating dioxygenase gene abundance in soil
Przemyslaw Sawulski, Nicholas Clipson, Evelyn Doyle
Biodegradation.2014; 25(6): 835. CrossRef
Anthracene biodegradation under nitrate-reducing condition and associated microbial community changes
Ying Wang, Rui Wan, Shuying Zhang, Shuguang Xie
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S. Y. Zhang, Q. F. Wang, S. G. Xie
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Increment in Anaerobic Hydrocarbon Degradation Activity of Halic Bay Sediments via Nutrient Amendment
Mustafa Kolukirik, Orhan Ince, Bahar K. Ince
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Revealing archaeal diversity patterns and methane fluxes in Admiralty Bay, King George Island, and their association to Brazilian Antarctic Station activities
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Deep Sea Research Part II: Topical Studies in Oceanography.2011; 58(1-2): 128. CrossRef
Bioremediation of marine sediments contaminated by hydrocarbons: Experimental analysis and kinetic modeling
Francesca Beolchini, Laura Rocchetti, Francesco Regoli, Antonio Dell’Anno
Journal of Hazardous Materials.2010; 182(1-3): 403. CrossRef

Review

Biosynthesis, Modification, and Biodegradation of Bacterial Medium-Chain-Length Polyhydroxyalkanoates: Do Young Kim , Hyung Woo Kim , Moon Gyu Chung , Young Ha Rhee; J. Microbiol. 2007;45(2):87-97.; DOI: https://doi.org/2528 [pii]

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Abstract: Medium-chain-length polyhydroxyalkanoates (MCL-PHAs), which have constituents with a typical chain length of C6-C14, are polyesters that are synthesized and accumulated in a wide variety of Gram-negative bacteria, mainly pseudomonads. These biopolyesters are promising materials for various applications because they have useful mechanical properties and are biodegradable and biocompatible. The versatile metabolic capacity of some Pseudomonas spp. enables them to synthesize MCL-PHAs that contain various functional substituents; these MCL-PHAs are of great interest because these functional groups can improve the physical properties of the polymers, allowing the creation of tailor-made products. Moreover, some functional substituents can be modified by chemical reactions to obtain more useful groups that can extend the potential applications of MCL-PHAs as environmentally friendly polymers and functional biomaterials for use in biomedical fields. Although MCL-PHAs are water-insoluble, hydrophobic polymers, they can be degraded by microorganisms that produce extracellular MCL-PHA depolymerase. MCL-PHA-degraders are relatively uncommon in natural environments and, to date, only a limited number of MCL-PHA depolymerases have been investigated at the molecular level. All known MCL-PHA depolymerases share a highly significant similarity in amino acid sequences, as well as several enzymatic characteristics. This paper reviews recent advances in our knowledge of MCL-PHAs, with particular emphasis on the findings by our research group.

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