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https://www.readbyqxmd.com/read/29660847/glu-571-of-phet-plays-a-pivotal-role-in-the-thermal-stability-of-escherichia-coli-phers-enzyme
#1
Sridar Ashwin Sri Bala, Irulappan Madhumathi, Sengottuvel Vinodha, M Hussain Munavar
As of date the two temperature sensitive mutations isolated in pheST operon include pheS5 (G293 →A293 ) and pheT354. Recently, we reported that G673 of pheS defines a hot spot for intragenic suppressors of pheS5. In this investigation, in 13 independent experiments, a collection of temperature sensitive mutants were isolated by localized mutagenesis. Complementation using clones bearing pheS+ , pheT+ , and pheS+ T+ indicated that 34 mutants could harbor lesion(s) in pheS and four could be in pheT and one mutant might be a double mutant...
April 16, 2018: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29619504/genetic-diversity-analysis-of-leuconostoc-mesenteroides-from-korean-vegetables-and-food-products-by-multilocus-sequence-typing
#2
Anshul Sharma, Jasmine Kaur, Sulhee Lee, Young-Seo Park
In the present study, 35 Leuconostoc mesenteroides strains isolated from vegetables and food products from South Korea were studied by multilocus sequence typing (MLST) of seven housekeeping genes (atpA, groEL, gyrB, pheS, pyrG, rpoA, and uvrC). The fragment sizes of the seven amplified housekeeping genes ranged in length from 366 to 1414 bp. Sequence analysis indicated 27 different sequence types (STs) with 25 of them being represented by a single strain indicating high genetic diversity, whereas the remaining 2 were characterized by five strains each...
April 4, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29616891/carnobacterium-antarcticum-sp-nov-a-psychrotolerant-alkaliphilic-bacterium-isolated-from-sandy-soil-in-antarctica
#3
Sidong Zhu, Danqiu Lin, Shangling Xiong, Xing Wang, Zehao Xue, Bingxia Dong, Xudong Shen, Xiangdong Ma, Jigang Chen, Jifang Yang
A novel, alkaliphilic, psychrotolerant, facultative anaerobe, designated CP1T , was isolated from sandy soil near the Davis Station in Antarctica. The short-rod-shaped cells displayed Gram-positive staining and did not form spores. Strain CP1T was able to grow at temperatures between 4 and 36 °C, pH 6.0-9.5, and in the presence of up to 5.0 % (w/v) NaCl. 16S rRNA gene and multilocus (pheS, rpoA, and atpA) sequence analysis revealed Carnobacterium mobile DSM 4848T and Carnobacterium iners LMG 26642T as the closest relatives (97...
April 4, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29596960/improving-the-selection-efficiency-of-the-counter-selection-marker-phes-for-the-genetic-engineering-of-bacillus-amyloliquefaciens
#4
Maria S Kharchenko, Petr N Teslya, Maria N Babaeva, Natalia P Zakataeva
Bacillus subtilis pheS was genetically modified to obtain a counter-selection marker with high selection efficiency in Bacillus amyloliquefaciens. The application of the new replication-thermosensitive integrative vector pNZTM1, containing this marker, pheSBsT255S/A309G , with a two-step replacement recombination procedure provides an effective tool for the genetic engineering of industrially important Bacillus species.
March 26, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29570728/at-hatch-administration-of-probiotic-to-chickens-can-introduce-beneficial-changes-in-gut-microbiota
#5
Stephen Baldwin, Robert J Hughes, Thi Thu Hao Van, Robert J Moore, Dragana Stanley
Recent advances in culture-free microbiological techniques bring new understanding of the role of intestinal microbiota in heath and performance. Intestinal microbial communities in chickens assume a near-stable state within the week which leaves a very small window for permanent microbiota remodelling. It is the first colonisers that determine the fate of microbial community in humans and birds alike, and after the microbiota has matured there are very small odds for permanent modification as stable community resists change...
2018: PloS One
https://www.readbyqxmd.com/read/29543150/lactobacillus-metriopterae-sp-nov-a-novel-lactic-acid-bacterium-isolated-from-the-gut-of-grasshopper-metrioptera-engelhardti
#6
Makoto Chiba, Takanori Itabashi, Koujiro Hirai, Mitsuo Sakamoto, Moriya Ohkuma, Taichiro Ishige, Shinji Kawasaki
A strain (Hime 5-1T ) of lactic acid bacterium was isolated from the gut of the grasshopper Metrioptera engelhardti from a mountainous area of Nagano Prefecture, Japan. Strain Hime 5-1T had a low 16S rRNA gene sequence similarity to known lactic acid bacteria, with the closest recognized relatives being Lactobacillus tucceti (96.7 %), Lactobacillus furfuricola (96.5 %), Lactobacillus versmoldensis (96.3 %) and Lactobacillus nodensis (96.1 %). Comparative analyses of the rpoA and pheS gene sequences indicated that Hime 5-1T is not closely related to other Lactobacillus species...
March 15, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29532380/potential-harmful-elements-in-coal-dust-and-human-health-risk-assessment-near-the-mining-areas-in-cherat-pakistan
#7
Muhammad Ishtiaq, Noor Jehan, Said Akbar Khan, Said Muhammad, Umar Saddique, Bushra Iftikhar, Zahidullah
This study was aimed to investigate the potential harmful element (PHE) concentrations in coal dust and evaluate the human risk assessment and health effects near coal mining areas. For this purpose, dust samples were collected near various coal mines in Cherat, Pakistan, and analyzed for the PHE concentrations. Determined PHE concentrations were evaluated for the health risk assessment. Results revealed that ingestion was the major pathway as compared to others for PHE exposure. Individual chronic daily intake (CDI) of PHEs was higher than their respective permissible exposure limits set for oral exposure routes by the Agency for Toxic Substances and Disease Registry (ATSDR)...
March 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29487732/isolation-and-identification-of-komagataeibacter-xylinus-from-iranian-traditional-vinegars-and-molecular-analyses
#8
Paria Sadat Lavasani, Elahe Motevaseli, Mahdieh Shirzad, Mohammad Hossein Modarressi
Background and Objectives: Acetic acid bacteria (AAB) are one of the major interests of researchers. Traditional vinegars are suitable sources of AAB because they are not undergone industrial process like filtering and adding preservatives. Komagataeibacter xylinus as a member of AAB is known as the main cellulose producer among other bacteria. The purpose of the current study was to isolate the bacteria from traditional vinegars and its molecular analyses. Materials and Methods: Vinegar samples were collected...
December 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29477918/tracing-source-distribution-and-health-risk-of-potentially-harmful-elements-phes-in-street-dust-of-durgapur-india
#9
Manash Gope, Reginald Ebhin Masto, Joshy George, Srinivasan Balachandran
Street dust samples from Durgapur, the steel city of eastern India, were collected from five different land use patterns, i.e., national highways, urban residential area, sensitive area, industrial area and busy traffic zone during summer, monsoon, and winter to analyze the pollution characteristics, chemical fractionation, source apportionment and health risk of heavy metals (HMs). The samples were fractionated into ≤ 53 µm and analyzed for potentially harmful elements (PHEs) viz. Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn...
February 22, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29458462/lactobacillus-panisapium-sp-nov-from-honeybee-apis-cerana-bee-bread
#10
Cong Wang, Yan Huang, Li Li, Jun Guo, Zhengyun Wu, Yu Deng, Lirong Dai, Shichun Ma
A novel facultatively anaerobic, Gram-stain-positive, non-motile, non-spore-forming, catalase-negative bacterium of the genus Lactobacillus, designated strain Bb 2-3T , was isolated from bee bread of Apis cerana collected from a hive in Kunming, China. The strain was regular rod-shaped. Optimal growth occurred at 37 °C, pH 6.5 with 5.0 g l-1 NaCl. The predominant fatty acids were C18 : 1ω9c, C16 : 0 and C19 : 0 iso. Respiratory quinones were not detected. Seven glycolipids, three lipids, phosphatidylglycerol and diphosphatidylglycerol were detected...
January 10, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29456028/polyphasic-characterization-of-a-novel-species-in-the-lactobacillus-casei-group-from-cow-manure-of-taiwan-description-of-l-chiayiensis-sp-nov
#11
Chien-Hsun Huang, Jong-Shian Liou, Ai-Yun Lee, Min Tseng, Mika Miyashita, Lina Huang, Koichi Watanabe
Two Gram-stain-positive, rod-shaped, non-motile, catalase-negative and facultative anaerobic strains, NCYUAST and BCRC 18859 (=NRIC 1947), were isolated from cow manure of Taiwan and coconut juice of Philippines, respectively. Comparative sequence analysis of 16S rRNA gene revealed that the novel strains were members of the genus Lactobacillus. These two strains had 100% of 16S rRNA gene sequence similarity and 98.6% of average nucleotide identity (ANI) value based on whole genome sequences. On the basis of 16S rRNA gene sequence similarity, the type strains of Lactobacillus casei (99...
February 7, 2018: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/29406432/pseudomyogenic-hemangioendothelioma-case-report-and-review-of-the-literature
#12
Emily Raftopoulos, Michael Royer, Mildred Warren, Jin Zhao, Walter Rush
Pseudomyogenic hemangioendothelioma (PHE; epithelioid sarcoma-like hemangioendothelioma) is a rare entity, with 129 reported cases. It is a rarely metastasizing, low-grade vascular tumor that can histologically mimic epithelioid sarcoma and often presents as multiple discontinuous nodules in the extremities. PHEs characteristically and consistently show immunoreactivity for cytokeratins and endothelial markers. We present a case in the thigh of a 65-year-old-man with a 3-month history of painful lesions in the dermis and review the published literature...
February 2, 2018: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29313245/effect-of-post-traumatic-stress-disorder-on-cognitive-function-and-covert-hepatic-encephalopathy-diagnosis-in-cirrhotic-veterans
#13
Thomas K Burroughs, James B Wade, Michael S Ellwood, Andrew Fagan, Douglas M Heuman, Michael Fuchs, Jasmohan S Bajaj
BACKGROUND: In veterans, post-traumatic stress disorder (PTSD) is often associated with substance abuse, which in turn can lead to cirrhosis. Cirrhotic patients are prone to cognitive impairment, which is typically due to covert hepatic encephalopathy (CHE), but can also be affected by PTSD. The aim was to define the impact of PTSD on cognitive performance and the diagnosis of CHE in cirrhotic patients. METHODS: Outpatient veterans with cirrhosis underwent two separate modalities for CHE cognitive testing [Psychometric Hepatic Encephalopathy Scale (PHES) and Inhibitory Control Test (ICT)]...
February 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29104110/pseudomyogenic-hemangioendothelioma-of-skin-bone-and-soft-tissue-a-clinicopathological-immunohistochemical-and-fluorescence-in-situ-hybridization-study
#14
Dinesh Pradhan, Karen Schoedel, Richard L McGough, Sarangarajan Ranganathan, Uma N M Rao
Pseudomyogenic hemangioendothelioma (PHE) is an uncommon neoplasm with propensity for local recurrence. The tumor mimics epithelioid hemangioendothelioma and epithelioid sarcoma, representing a possible diagnostic pitfall. We investigated the clinicopathological, immunohistochemical, and fluorescence in situ hybridization features of PHEs. Eight cases of PHE were retrieved from our pathology archives. The clinical and outcome information was available in 6 patients. In 6 cases, the tumors were located in the lower limb, whereas the upper limb was involved in 2 cases...
January 2018: Human Pathology
https://www.readbyqxmd.com/read/29072561/enterococcus-wangshanyuanii-sp-nov-isolated-from-faeces-of-yaks-bos-grunniens
#15
Dong Jin, Jing Yang, Shan Lu, Xin-He Lai, YanWen Xiong, Jianguo Xu
The taxonomic position of four phenotypically closely related strains isolated from faecal samples of yaks (Bos grunniens) collected from the Qinghai-Tibetan plateau, China, was determined by a polyphasic approach. The strains were non-spore-forming, non-motile Gram-stain-positive, ovoid cocci, occurring predominantly in pairs and short chains or in irregular clusters. The 16S rRNA gene of strain MN05(T) was related phylogenetically to those of Enterococcushaemoperoxidus, Enterococcusrotai, Enterococcusquebecensis, Enterococcusplantarum, Enterococcuscrotali, Enterococcusmoraviensis, Enterococcussilesiacus, Enterococcuscaccae, Enterococcustermitis, Enterococcusureasiticus and Enterococcusureilyticus, all belonging to the Enterococcusfaecalis species group...
October 26, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29058648/lactobacillus-musae-sp-nov-a-novel-lactic-acid-bacterium-isolated-from-banana-fruits
#16
Yi-Sheng Chen, Li-Ting Wang, Yu-Jou Liao, Yi-Shan Lan, Chi-Huan Chang, Yu-Chung Chang, Hui-Chung Wu, Huei-Yin Lo, Misa Otoguro, Fujitoshi Yanagida
Two Gram-stain-positive, catalase-negative, rod-shaped, bacterial strains (313(T) and 311) were isolated from banana fruits in Taiwan. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the highest similarity to both strains corresponded to the type strain of Lactobacillus nantensis (99.19 %), followed by Lactobacillus crustorum (98.99 %), Lactobacillus heilongjiangensis (98.59 %) and Lactobacillus farciminis (98.52 %). Phylogenetic analysis based on the sequences of two housekeeping genes, pheS and rpoA, revealed that these two strains were well separated from the Lactobacillus reference strains...
October 23, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29034853/floricoccus-tropicus-gen-nov-sp-nov-and-floricoccus-penangensis-sp-nov-isolated-from-fresh-flowers-of-durian-tree-and-hibiscus
#17
Li-Oon Chuah, Kien-Pong Yap, Ahamed Kamal Shamila-Syuhada, Kwai Lin Thong, Rosma Ahmad, Min Tze Liong, Gulam Rusul
Three strains of Gram-staining-positive, coccus-shaped, lactic acid bacteria, designated as HibF3(T), HibF2 and HibF5 were isolated from fresh flowers of hibiscus, and a fourth, DF1(T), was isolated from fresh flowers of durian tree, in Penang, Malaysia. Taxonomic characterisation was performed by polyphasic analysis. Sequence similarities of the 16S rRNA gene and the housekeeping rpoA and pheS genes of these strains with their closely-related lactococcal and streptococcal relatives were 92-94, 78 and 81 %, respectively...
October 16, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28971067/the-role-of-the-regulator-fur-in-gene-regulation-and-virulence-of-riemerella-anatipestifer-assessed-using-an-unmarked-gene-deletion-system
#18
Yunqing Guo, Di Hu, Jie Guo, Xiaowen Li, Jinyue Guo, Xiliang Wang, Yuncai Xiao, Hui Jin, Mei Liu, Zili Li, Dingren Bi, Zutao Zhou
Riemerella anatipestifer, an avian pathogen, has resulted in enormous economic losses to the duck industry globally. Notwithstanding, little is known regarding the physiological, pathogenic and virulence mechanisms of Riemerella anatipestifer (RA) infection. However, the role of Ferric uptake regulator (Fur) in the virulence of R. anatipestifer has not, to date, been demonstrated. Using a genetic approach, unmarked gene deletion system, we evaluated the function of fur gene in the virulence of R. anatipestifer...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28919805/a-pilot-evaluation-of-a-computer-based-psychometric-test-battery-designed-to-detect-impairment-in-patients-with-cirrhosis
#19
Nicola A Cook, Jin Un Kim, Yasmin Pasha, Mary Me Crossey, Adrian J Schembri, Brian T Harel, Torben Kimhofer, Simon D Taylor-Robinson
BACKGROUND: Psychometric testing is used to identify patients with cirrhosis who have developed hepatic encephalopathy (HE). Most batteries consist of a series of paper-and-pencil tests, which are cumbersome for most clinicians. A modern, easy-to-use, computer-based battery would be a helpful clinical tool, given that in its minimal form, HE has an impact on both patients' quality of life and the ability to drive and operate machinery (with societal consequences). AIM: We compared the Cogstate™ computer battery testing with the Psychometric Hepatic Encephalopathy Score (PHES) tests, with a view to simplify the diagnosis...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/28895518/lactobacillus-curtus-sp-nov-isolated-from-beer-in-finland
#20
Yuki Asakawa, Nobuchika Takesue, Shizuka Asano, Satoshi Shimotsu, Kazumaru Iijima, Koji Suzuki, Yasuo Motoyama, Masayuki Aizawa
A Gram-stain-positive, catalase-negative and short-rod-shaped organism, designated VTT E-94560, was isolated from beer in Finland and deposited in the VTT culture collection as a strain of Lactobacillus rossiae. However, the results of 16S rRNA gene sequence analysis showed that VTT E-94560 was only related to Lactobacillus rossiae JCM 16176(T) with 97.0 % sequence similarity, lower than the 98.7 % regarded as the boundary for the species differentiation. Additional phylogenetic studies on the pheS gene, rpoA gene and 16S-23S rRNA internally transcribed spacer region further reinforced the taxonomically independent status of VTT E-94560 and its related Lactobacillus species including L...
October 2017: International Journal of Systematic and Evolutionary Microbiology
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