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Archaea: An International Microbiological Journal

Hisanori Kondo, Midori Murakami
Isocitrate dehydrogenase is a catabolic enzyme that acts during the third step of the tricarboxylic acid cycle. The hypothetical protein ST2166 from the archaeon Sulfolobus tokodaii was isolated and crystallized. It shares high primary structure homology with prokaryotic NADP+ -dependent IDHs, suggesting that these enzymes share a common enzymatic mechanism. The crystal structure of ST2166 was determined at 2.0 Å resolution in the apo form, and then the structure of the crystal soaked with NADP+ was also determined at 2...
2018: Archaea: An International Microbiological Journal
Jin Li, Rutao Liu, Yu Tao, Guangbin Li
No abstract text is available yet for this article.
2018: Archaea: An International Microbiological Journal
Yanfen Zhang, Anzhou Ma, Wenzong Liu, Zhihui Bai, Xuliang Zhuang, Guoqiang Zhuang
Recently, a new oxygenic pathway has been proposed based on the disproportionation of NO with putative NO dismutase (Nod). In addition to a new process in nitrogen cycling, this process provides ecological advantages for the degradation of substrates in anaerobic conditions, which is of great significance for wastewater treatment. However, the Nod distribution in aquatic environments is rarely investigated. In this study, we obtained the nod genes with an abundance of 2.38 ± 0.96 × 105 copies per gram of dry soil from the Zoige wetland and aligned the molecular characteristics in the corresponding Nod sequences...
2018: Archaea: An International Microbiological Journal
Xiu-Lu Lang, Xiang Chen, Ai-Ling Xu, Zhi-Wen Song, Xin Wang, He-Bing Wang
Microorganisms play important roles in the reduction of organic and inorganic pollutants in constructed wetlands used for the treatment of wastewater. However, the diversity and structure of microbial community in constructed wetland system remain poorly known. In this study, the Illumina MiSeq Sequencing of 16S rDNA was used to analyze the bacterial and archaeal microbial community structures of soil and water in a free surface flow constructed wetland, and the differences of bacterial communities and archaeal compositions between soil and water were compared...
2018: Archaea: An International Microbiological Journal
Zhixuan Yin, Xuejun Bi, Chenlu Xu
An increase in the number of publications in recent years indicates that besides ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA) may play an important role in nitrogen removal from wastewater, gaining wide attention in the wastewater engineering field. This paper reviews the current knowledge on AOA and AOB involved in wastewater treatment systems and summarises the environmental factors affecting AOA and AOB. Current findings reveal that AOA have stronger environmental adaptability compared with AOB under extreme environmental conditions (such as low temperature and low oxygen level)...
2018: Archaea: An International Microbiological Journal
Huihui Wang, Shaoping Kuang, Qiaolin Lang, Wenjuan Yu
The oilfield soil was contaminated for years by large quantities of aged oil sludge generated in the petroleum industry. In this study, physicochemical properties, contents of main pollutants, and fungal diversity of the aged oil sludge-contaminated soil were analyzed. Results revealed that aged oil sludge significantly changed physical and chemical properties of the receiving soil and increased the contents of main pollutants (petroleum hydrocarbons and heavy metals) in soil. Meanwhile, the internal transcribed spacer (ITS) sequencing by Illumina Miseq platform at each taxonomic level demonstrated that the toxicological effect of oil pollutants obviously influenced the fungal diversity and community structure in soil...
2018: Archaea: An International Microbiological Journal
Mark James Krzmarzick, David Kyle Taylor, Xiang Fu, Aubrey Lynn McCutchan
Bioremediation is the use of microorganisms for the degradation or removal of contaminants. Most bioremediation research has focused on processes performed by the domain Bacteria ; however, Archaea are known to play important roles in many situations. In extreme conditions, such as halophilic or acidophilic environments, Archaea are well suited for bioremediation. In other conditions, Archaea collaboratively work alongside Bacteria during biodegradation. In this review, the various roles that Archaea have in bioremediation is covered, including halophilic hydrocarbon degradation, acidophilic hydrocarbon degradation, hydrocarbon degradation in nonextreme environments such as soils and oceans, metal remediation, acid mine drainage, and dehalogenation...
2018: Archaea: An International Microbiological Journal
Kai Wang, Lusheng Li, Fengxun Tan, Daoji Wu
Landfill leachate contains a large amount of organic matter and ammoniacal nitrogen. As such, it has become a complex and difficult issue within the water treatment industry. The activated sludge process has been found to be a good solution with low processing costs and is now therefore the core process for leachate treatment, especially for nitrogen removal. This paper describes the characteristics and treatment of leachate. Treatment of leachate using the activated sludge process includes the removal of organic matter, ammoniacal nitrogen, and total nitrogen (TN)...
2018: Archaea: An International Microbiological Journal
Yan Yang, Zhiyu Shao, Jun Du, Qiang He, Hongxiang Chai
High salinity can strongly inhibit microbial activity and decrease the sedimentation ability of activated sludge. The combination of biofilm and membrane bioreactor is a practical approach towards effective removal of pollutants and low fouling rate. An integrated biofilm-membrane bioreactor (BMBR) treating mustard tuber wastewater was investigated. An average COD removal efficiency of 94.81% and ammonium removal efficiency of 96.84% were achieved at an organic load of 0.5 kg COD/(m3 ·d). However, the reactor showed a relatively low efficiency in total nitrogen and soluble phosphorus removal due to the lack of anaerobic environment...
2018: Archaea: An International Microbiological Journal
Shaoping Kuang, Yaqing Su, Huihui Wang, Wenjuan Yu, Qiaolin Lang, Ravichandra Matangi
Microorganisms are sensitive indicators of edaphic environmental variation. The Illumina MiSeq sequencing technology was used to analyze soil bacterial community diversity around an aging oil sludge in the Yellow River Delta. The alpha diversity index of soil bacterial community results (Ace, Chao, Shannon, and Simpson) determined that bacterial community diversity sampling within the scope of a 20 cm radius from the center of an aging oil sludge spot showed the most abundant diversity. The level of diversity distributed symmetrically with radial direction from the center of the aging oil sludge spot...
2018: Archaea: An International Microbiological Journal
Anja Poehlein, Dominik Schneider, Melissa Soh, Rolf Daniel, Henning Seedorf
Methanobrevibacter and Methanosphaera species represent some of the most prevalent methanogenic archaea in the gastrointestinal tract of animals and humans and play an important role in this environment. The aim of this study was to identify genomic features that are shared or specific for members of each genus with a special emphasis of the analysis on the assimilation of nitrogen and acetate and the utilization of methanol and ethanol for methanogenesis. Here, draft genome sequences of Methanobrevibacter thaueri strain DSM 11995T , Methanobrevibacter woesei strain DSM 11979T , and Methanosphaera cuniculi strain 4103T are reported and compared to those of 16 other Methanobrevibacter and Methanosphaera genomes, including genomes of the 13 currently available types of strains of the two genera...
2018: Archaea: An International Microbiological Journal
Yanhao Zhang, Haohan Zhang, Zhibin Zhang, Yuchen Wang, Taha Marhaba, Jixiang Li, Cuizhen Sun, Wen Zhang
This study investigated the performance of an autohydrogenotrophic membrane biofilm reactor (MBfR) to remove nitrate from water with high sulfate concentrations. The results of simulated running showed that TN removal could be over than 98.8% with the maximum denitrification rate of 134.6 g N/m3  d under the conditions of the influent sulfate concentrations of 300 mg SO4 2- /l. The distribution ratio of H2 electron donor for nitrate and sulfate was 70.0 : 26.9 at the high influent loading ratio of sulfate/nitrate of 853...
2018: Archaea: An International Microbiological Journal
Shuo Wang, Jianzheng Li, Guochen Zheng, Guocheng Du, Ji Li
Hydrogen-producing acetogens (HPA) have a transitional role in anaerobic wastewater treatment. Thus, bioaugmentation with HPA cultures can enhance the chemical oxygen demand (COD) removal efficiency and CH4 yield of anaerobic wastewater treatment. Cultures with high degradation capacities for propionic acid and butyric acid were obtained through continuous subculture in enrichment medium and were designated as Z08 and Z12. Bioaugmentation with Z08 and Z12 increased CH4 production by glucose removal to 1.58...
2018: Archaea: An International Microbiological Journal
Nina Lackner, Anna Hintersonnleitner, Andreas Otto Wagner, Paul Illmer
Although Methanosarcinales are versatile concerning their methanogenic substrates, the ability of Methanosarcina thermophila to use carbon dioxide (CO2 ) for catabolic and anabolic metabolism was not proven until now. Here, we show that M. thermophila used CO2 to perform hydrogenotrophic methanogenesis in the presence as well as in the absence of methanol. During incubation with hydrogen, the methanogen utilized the substrates methanol and CO2 consecutively, resulting in a biphasic methane production. Growth exclusively from CO2 occurred slowly but reproducibly with concomitant production of biomass, verified by DNA quantification...
2018: Archaea: An International Microbiological Journal
Yue Li, Qi Hu, Da-Wen Gao
An integrated anaerobic fluidized-bed membrane bioreactor (IAFMBR) was investigated to treat synthetic high-strength benzothiazole wastewater (50 mg/L) at a hydraulic retention time (HRT) of 24, 18, and 12 h. The chemical oxygen demand (COD) removal efficiency (from 93.6% to 90.9%), the methane percentage (from 70.9% to 69.27%), and the methane yield (from 0.309 m3 CH4 /kg·CODremoved to 0.316 m3 CH4 /kg·CODremoved ) were not affected by decreasing HRTs. However, it had an adverse effect on membrane fouling (decreasing service period from 5...
2018: Archaea: An International Microbiological Journal
Xiaona Ma, Xingqiang Song, Xian Li, Songzhe Fu, Meng Li, Ying Liu
Microorganisms play an essential role in the performance of constructed wetlands (CWs) for wastewater treatment. However, there has been limited discussion on the characteristics of microbial communities in CWs for treatment of effluents from marine recirculating aquaculture systems (RAS). This study is aimed at characterizing the microbial communities of pilot-scale CWs with Salicornia bigelovii for treatment of saline wastewater from a land-based Atlantic salmon RAS plant located in Northern China. Illumina high-throughput sequencing was employed to identify the profile of microbial communities of three CWs receiving wastewater under different total ammonia nitrogen (TAN) concentrations...
2018: Archaea: An International Microbiological Journal
Matías Rivero, Constanza Torres-Paris, Rodrigo Muñoz, Ricardo Cabrera, Claudio A Navarro, Carlos A Jerez
Polyphosphates (PolyP) are linear polymers of orthophosphate residues that have been proposed to participate in metal resistance in bacteria and archaea. In addition of having a CopA/CopB copper efflux system, the thermoacidophilic archaeon Metallosphaera sedula contains electron-dense PolyP-like granules and a putative exopolyphosphatase (PPX Msed , Msed_0891 ) and four presumed pho84 -like phosphate transporters ( Msed_0846 , Msed_0866 , Msed_1094 , and Msed_1512 ) encoded in its genome. In the present report, the existence of a possible PolyP-based copper-resistance mechanism in M...
2018: Archaea: An International Microbiological Journal
Wei-Yu Chen, Lucia Kraková, Jer-Horng Wu, Domenico Pangallo, Lenka Jeszeová, Bing Liu, Hidenari Yasui
Tetramethylammonium-degrading methanogenic consortia from a complete-mixing suspended sludge (CMSS) and an upflow anaerobic sludge blanket (UASB) reactors were studied using multiple PCR-based molecular techniques and shotgun proteomic approach. The prokaryotic 16S rRNA genes of the consortia were analyzed by quantitative PCR, high-throughput sequencing, and DGGE-cloning methods. The results showed that methanogenic archaea were highly predominant in both reactors but differed markedly according to community structure...
2017: Archaea: An International Microbiological Journal
Feng Long, Liangliang Wang, Boguslaw Lupa, William B Whitman
Many hydrogenotrophic methanogens use either H2 or formate as the major electron donor to reduce CO2 for methane production. The conventional cultivation of these organisms uses H2 and CO2 as the substrate with frequent replenishment of gas during growth. H2 is explosive and requires an expensive gassing system to handle safely. Formate is as an ideal alternative substrate from the standpoints of both economy and safety but leads to large changes in the culture pH during growth. Here, we report that glycylglycine is an inexpensive and nontoxic buffer suitable for growth of Methanococcus maripaludis and Methanothermococcus okinawensis ...
2017: Archaea: An International Microbiological Journal
Yanli Zhang, Linley R Schofield, Carrie Sang, Debjit Dey, Ron S Ronimus
( R )-Sulfolactate dehydrogenase (EC, termed ComC, is a member of an NADH/NADPH-dependent oxidoreductase family of enzymes that catalyze the interconversion of 2-hydroxyacids into their corresponding 2-oxoacids. The ComC reaction is reversible and in the biosynthetic direction causes the conversion of ( R )-sulfolactate to sulfopyruvate in the production of coenzyme M (2-mercaptoethanesulfonic acid). Coenzyme M is an essential cofactor required for the production of methane by the methyl-coenzyme M reductase complex...
2017: Archaea: An International Microbiological Journal
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