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Journal of Microbiology and Biotechnology

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https://www.readbyqxmd.com/read/28633518/the-optimization-of-siderophore-production-by-bacillus-sp-pz-1-and-its-potential-enhancement-on-phytoextration-of-pb-from-soil
#1
Sumei Yu, Chunying Teng, Xin Bai, Jinsong Liang, Tao Song, Liying Dong, Yu Jin, Juanjuan Qu
In this study, the siderophore-producing characteristics and conditions of Bacillus sp. PZ-1 were investigated and the enhancement of siderophores on Pb uptake and translocation in Brassica juncea were determined. Results of single factor experiment showed that glucose, pH and Pb(NO3)2 could stimulate PZ-1 growth and siderophore production. The maximum siderophore production of 90.52% siderophore units was obtained by response surface methodology optimization at glucose concentration of 21.84 g/l, pH 6.18 and Pb(NO3)2 concentration of 245...
June 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28633517/biomethanation-of-sewage-sludge-with-food-waste-leachate-via-co-digestion
#2
Jingyeong Shin, Young Beom Kim, Jong Hun Jeon, Sangki Choi, In Kyu Park, Young Mo Kim
Anaerobic mono- and co-digestion of sewage sludge (SS) and food waste leachate (FWL) were performed by assessing methane production and characterizing microbial communities. Anaerobic digestion (AD) of waste activated sludge (WAS) alone produced the lowest methane production (281 mL-CH4), but an approximately 80% increase in methane production was achieved via co-digestion of WAS and FWL (506 mL-CH4). There were less differences in the diversity of bacterial communities in anaerobic digesters, while archaeal (ARC) and bacterial (BAC) amounts reflected AD's performance...
June 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28633516/synthesis-of-curcumin-glycosides-with-enhanced-anti-cancer-properties-using-one-pot-multi-enzyme-glycosylation-technique
#3
Rit Bahadur Gurung, So Youn Gong, Tuoi Thi Le, Dipesh Dhakal, Narae Jung, Hye Jin Jung, Tae Jin Oh, Jae Kyung Sohng
Curcumin is a natural polyphenolic compound, widely acclaimed for its antioxidant, anti-inflammatory, antibacterial and anti-cancerous properties. However, its use has been limited due to low-aqueous solubility and poor bioavailability, rapid clearance and low cellular uptake. In order to assess the effect of glycosylation on pharmacological properties of curcumin, the one-pot multi-enzyme (OPME) chemoenzymatic glycosylation reactions with UDP-α-D-glucose or UDP-α-D-2-deoxyglucose as donor substrate were employed...
June 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28633515/crystal-structure-and-functional-characterization-of-a-cytochrome-p450-bacyp106a2-from-bacillus-sp-pamc-23377
#4
Ki-Hwa Kim, Chang Woo Lee, Bikash Dangi, Sun-Ha Park, Hyun Park, Tae-Jin Oh, Jun Hyuck Lee
Bacterial cytochrome P450 (CYP) steroid hydroxylases are effectively useful in the pharmaceutical industry for introducing hydroxyl groups to a wide range of steroids. We found a putative CYP steroid hydroxylase (BaCYP106A2) from the bacterium Bacillus sp. PAMC 23377 isolated from Kara Sea of the Arctic Ocean, showing 94% sequence similarity with BmCYP106A2 (Bacillus megaterium ATCC 13368). In this study, soluble BaCYP106A2 was overexpressed to evaluate its substrate-binding activity. The substrate affinity (Kd value) to 4-androstenedione was 387 ± 37 µM...
June 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28633514/metagenomic-smrt-sequencing-based-exploration-of-novel-lignocellulose-degrading-capability-in-wood-detritus-from-torreya-nucifera-in-bija-forest-on-jeju-island
#5
Han Na Oh, Tae Kwon Lee, Jae Wan Park, Jee Hyun No, Dockyu Kim, Woo Jun Sul
Lignocellulose, mostly composed of cellulose, hemicellulose and lignin generated through secondary growth of woody plant, is considered as promising resources for bio-fuel. In order to use lignocellulose as a biofuel, the biodegradation besides high-cost chemical treatments were applied, but its knowledge on decomposition of lignocellulose occurring in a natural environment were insufficient. We analyzed 16S rRNA gene and metagenome to understand how the lignocellulose are decomposed naturally in decayed Torreya nucifera (L) of Bija forest (Bijarim) in Gotjawal, an ecologically distinct environment...
June 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28633513/gram-scale-production-of-ginsenoside-f1-using-a-recombinant-bacterial-%C3%AE-glucosidase
#6
Dong-Shan An, Chang-Hao Cui, Muhammad Zubair Siddiqi, Hong Shan Yu, Feng-Xie Jin, Song-Gun Kim, Wan-Taek Im
Naturally occurring ginsenoside F1 (20-O-β-D-glucopyranosyl-20(S)-protopanaxatriol) is rare. Here, we produced gram-scale quantities of ginsenoside F1 from a crude protopanaxatriol saponin mixture comprised mainly of Re and Rg1 through enzyme-mediated biotransformation using recombinant β-glucosidase (BgpA) cloned from a soil bacterium, Terrabacter ginsenosidimutans Gsoil3082(T). In a systematic, step-by-step process, the concentrations of substrate, enzyme, and NaCl were determined for maximal production of F1...
June 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621113/alteration-of-dna-methylation-in-gastric-cancer-with-chemotherapy
#7
REVIEW
Su Jin Choi, Seok Won Jung, Sora Huh, Yoon-Seok Chung, Hyosun Cho, Hyojeung Kang
Epigenetic alterations such as DNA methylation, histone acetylation, and chromatin remodeling can control gene expression by regulating gene transcription. DNA methylation is one of the frequent epigenetic events that play important roles in cancer development. Cancer cells can gain significant resistance to anticancer drugs and escape programmed cell death through major epigenetic changes, including DNA methylation. To date, several research groups have identified instances of both 1) hypermethylation of tumor suppressor genes, and 2) global hypomethylation of oncogenes...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621112/increased-immunogenicity-and-protective-efficacy-of-the-p-aeruginosa-vaccine-in-mice-using-an-alum-and-de-o-acylated-lipooligosaccharide-adjuvant-system
#8
Ji In Ryu, Seo Ri Wui, Ara Ko, Yeon Jeong Lee, Hien Thi Thu Do, Hark Jun Kim, In Moo Rhee, Shin Ae Park, Kwang Sung Kim, Yang Je Cho, Na Gyong Lee
Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic pathogen that commonly causes fatal infections in cystic fibrosis and burn patients as well as in patients who are hospitalized or have impaired immune systems. P. aeruginosa infections are difficult to treat due to the high resistance of the pathogen to conventional antibiotics. Despite several efforts, no effective prophylactic vaccines against P. aeruginosa are currently available. In this study, we investigated the activity of the CIA06 adjuvant system, which is comprised of alum and de-O-acylated lipooligosaccharide, on a P...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621111/antiamoebic-activity-of-petiveria-alliacea-leaves-and-their-main-component-isoarborinol
#9
Lizeth Zavala Ocampo, Eva Aguirre HernÁndez, Nury Pérez HernÁndez, Gildardo Rivera SÁnchez, Laurence A Marchat, Esther Ramírez Moreno
Petiveria alliacea L. (Phytolacaceae) is a medicinal plant with a broad range of traditional therapeutic properties, including the treatment of dysentery and intestinal infections caused by protozoan parasites. However its effects against Entamoeba histolytica have not been reported yet. We here investigated the antiamoebic activity present in the leaves of P. alliacea L. Antiamoebic activity was evaluated in methanolic and aqueous extract, as well as in the hexanic, methanolic and EtOAc fractions. P. alliacea L...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621110/characterization-of-microbial-communities-in-chinese-rice-wine-collected-at-yichang-city-and-suzhou-city-in-china
#10
Yucai Lyu, Yanli Gong, Yajie Li, Zejiang Pan, Yi Yao, Ning Li, Jinling Guo, Dachun Gong, Yihong Ti, Caiyun Peng
Two typical microbial communities from Chinese rice wine fermentation collected in Yichang city and Suzhou city in China were investigated. Both communities could ferment glutinous rice to rice wine in 2 d. The sugar and ethanol contents were 198.67 and 14.47 mg/g, respectively, for rice wine from Yichang city, and 292.50 and 12.31 mg/g, respectively, for rice wine from Suzhou city. Acetic acid and lactic acid were the most abundant organic acids. Abundant fungi and bacteria were detected in both communities by high-throughput sequencing...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621109/comparative-genomic-analysis-of-lactobacillus-plantarum-gb-lp1-isolated-from-traditional-korean-fermented-food
#11
Jihyun Yu, Sojin Ahn, Kwondo Kim, Kelsey Caetano-Anolles, Chanho Lee, Jungsun Kang, Kyungjin Cho, SookHee Yoon, Dae-Kyung Kang, Heebal Kim
As probiotics play an important role in maintaining a healthy gut flora environment through antitoxin activity and inhibition of pathogen colonization, they have been of interest to the medical research community for quite some time now. Probiotic bacteria such as Lactobacillus plantarum, which can be found in fermented food, are of particular interest given their easy accessibility. We performed whole genome sequencing and genomic analysis on a GB-LP1 strain of L. plantarum isolated from Korean traditional fermented food; this strain is well known for its functions in immune response, suppression of pathogen growth and anti-toxin effects...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621108/inhibitory-effects-of-flavonoids-from-spatholobus-suberectus-on-sortase-a-and-sortase-a-mediated-aggregation-of-streptococcus-mutans
#12
Wanki Park, Chan-Hong Ahn, Hyunjoo Cho, Chang-Kwon Kim, Jongheon Shin, Ki-Bong Oh
Seven flavonoids were isolated from Spatholobus suberectus via repetitive column chromatography and high-performance liquid chromatography. The chemical structures of these compounds were identified by spectroscopic analysis and comparison with values reported in the literature. Among the flavonoids tested, 7-hydroxy-6-methoxyflavanone (1) and formononetin (4) exhibited strong inhibitory activity against Streptococcus mutans SrtA, with IC50 values of 46.1 and 41.8 µM, respectively, but did not affect cell viability...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621107/bioconversion-of-pinoresinol-diglucoside-from-glucose-using-resting-and-freeze-dried-phomopsis-sp-xp-8-cells
#13
Zhenhong Gao, Muhammad Shahid Riaz Rajoka, Jing Zhu, Zhiwei Zhang, Yan Zhang, Jinxin Che, Xiaoguang Xu, Junling Shi
Phomopsis sp. XP-8 (an endophytic fungus) was previously found to produce pinoresinol diglucoside (PDG), a major antihypertensive compound of Tu-Chung (the bark of Eucommia ulmoides Oliv.), which is widely used in Chinese traditional medicines. In the present study, two bioconversion systems were developed for the production of PDG in Tris-HCl buffer containing glucose and Phomopsis sp. XP-8 cells (both resting and freeze-dried). When other factors remained unchanged, the bioconversion time, glucose concentration, cell ages, cell dosage, pH, temperature, and stirring speed influenced PDG production in a similar and decreasing manner after an initial increase with increasing levels for each factor...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621106/a-rapid-and-efficient-screening-method-for-antibacterial-compound-producing-bacteria
#14
Sachithra Amarin Hettiarachchi, Su-Jin Lee, Youngdeuk Lee, Young-Kyung Kwon, Mahanama De Zoysa, Song Moon, Eunyoung Jo, Taeho Kim, Do-Hyung Kang, Soo-Jin Heo, Chulhong Oh
Antibacterial compounds are widely used in the treatment of human and animal diseases. The overuse of antibiotics has led to a rapid rise in the prevalence of drug-resistant bacteria, making the development of new antibacterial compounds essential. This study is focused on developing a fast and easy method for identifying marine bacteria that produce antibiotic compounds. Eight randomly selected marine target bacteria species (Agrococcus terreus, Bacillus algicola, Mesoflavibacter zeaxanthinifaciens, Pseudoalteromonas flavipulchra, P...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621105/isolation-purification-and-identification-of-taxol-and-related-taxanes-from-taxol-producing-fungus-aspergillus-niger-subsp-taxi
#15
Dan Li, Dongwei Fu, Yue Zhang, Xueling Ma, Liguo Gao, Xioahua Wang, Dongpo Zhou, Kai Zhao
The content of taxol in the bark of yews is very low, and this is not affordable from the environmental point of view. Thus, it is a necessity to look for alternative sources of taxol production to solve its supply. Currently a large portion of the taxol in the market comes from chemical semi-synthesis, but the semi-synthetic precursors such as baccatin Ⅲ and 10-deacetyl-baccatin Ⅲ are extracted from needles and twigs of yew trees. Taxol-producing fungi as a renewable resource is a very promise to increase the scale of taxol production...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28595383/cooperative-interactions-between-toll-like-receptor-2-and-toll-like-receptor-4-in-murine-klebsiella-pneumoniae-infections
#16
Hee-Yeon Jeon, Jong-Hyung Park, Jin-Il Park, Jun-Young Kim, Sun-Min Seo, Seung-Hoon Ham, Eui-Suk Jeong, Yang-Kyu Choi
Klebsiella pneumoniae is an opportunistic and clinically significant emerging pathogen. We investigated the relative roles of Toll-like receptor (TLR) 2 and TLR4 in initiating host defenses against K. pneumoniae. TLR2 knockout (KO), TLR4 KO, TLR2/4 double KO (DKO), and wild-type (WT) mice were inoculated with K. pneumoniae. Mice in each group were sacrificed after either 12 or 24 hours, and lungs, livers, and blood were harvested to enumerate bacterial colony-forming units (CFU). Cytokine and chemokine levels were analyzed using enzyme-linked immunosorbent assay and real-time PCR, and pneumonia severity was determined by histopathological analysis...
June 8, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28595382/anti-inflammatory-properties-of-bifidobacterium-longum-expressing-human-manganese-superoxide-dismutase-using-the-tnbs-induced-rats-model-of-colitis
#17
Yajie Xie, Qing Guo, Shiyu Li, Mengge Liu, Qian Zhang, Zhenrui Xu, Hanxiao Sun
The chronic enteritis disease ulcerative colitis (UC) is a formidable opponent, and its etiology remains unclear. Current studies have shown that oxidative stress is closely related to the pathogenesis of inflammatory bowel disease. Antioxidant enzymes, such as manganese superoxide dismutase (MnSOD),have been deemed to exert an anti-inflammatory function. Normally, oral administration of MnSOD directly leads to an incapacitation because of poor penetration and stability. To address this problem, the probiotic Bifidobacterium longum (B...
June 8, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28595381/enhanced-internalization-of-macromolecular-drugs-into-mycobacteriumsmegmatis-with-the-assistance-of-silver-nanoparticles
#18
Fangfang Sun, Sangjin Oh, Jeonghyo Kim, Tatsuya Kato, Hwa-Jung Kim, Jaebeom Lee, Enoch Y Park
In this study, silver nanoparticles (AgNPs) were synthesized by the citrate reduction process and, with the assistance of n-hydroxysuccinimide and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide, were successfully loaded with the macromolecular drug vancomycin (VAM) to form AgNP-VAM bioconjugates. The synthesized AgNPs, VAM, and AgNP-VAM conjugate were characterized by UV-visible spectroscopy, zeta potential analysis, confocal microscopy, and transmission electron microscopy. The effect of loading VAM onto AgNPs was investigated by testing the internalization of the bioconjugate into Mycobacterium smegmatis...
June 8, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28539041/outer-membrane-vesicles-derived-from-salmonella-enteritidis-protect-against-the-virulent-wild-type-strain-infection-in-a-mouse-model
#19
Qiong Liu, Jie Yi, Kang Liang, Xiangmin Zhang, Qing Liu
Food-borne contamination and salmonellosis caused by Salmonella Enteritidis (S. Enteritidis) are a significant threat to human health and poultry enterprises. Outer membrane vesicles (OMVs), which are naturally secreted by gram-negative bacteria, could be a good vaccine option because they have many biologically active substances, including lipopolysaccharides (LPS), outer membrane proteins (OMPs), and phospholipids, as well as periplasmic components. In the present study, we purified OMVs derived from S. Enteritidis and analyzed their characteristics through silver staining and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE)...
May 25, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28535614/elucidating-bottlenecks-of-the-efficient-preparation-of-an-ab5-hexamer-mucosal-adjuvant-protein-ltm-by-genetic-engineering
#20
Di Liu, Fabiao Hu, Wenpeng Wang, Dong Wu, Xiujuan He, Wenyun Zheng, Haipeng Liu, Xingyuan Ma
Escherichia coli heat-labile enterotoxin (LT) and its non-toxic mutant (LTm) are well-known powerful mucosal adjuvants and immunogens. However, the yields of these adjuvants from genetically engineered strains remain at extremely low levels, thereby hindering their extensive application in fundamental and clinical research. Therefore, efficient production of these adjuvant proteins from genetically engineered microbes is a huge challenge in the field of molecular biology. In order to explore expression bottlenecks of LTm in E...
May 24, 2017: Journal of Microbiology and Biotechnology
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