keyword
MENU ▼
Read by QxMD icon Read
search

Mobile genetic element

keyword
https://www.readbyqxmd.com/read/28818345/mobile-group-ii-introns-as-ancestral-eukaryotic-elements
#1
REVIEW
Olga Novikova, Marlene Belfort
The duality of group II introns, capable of carrying out both self-splicing and retromobility reactions, is hypothesized to have played a profound role in the evolution of eukaryotes. These introns likely provided the framework for the emergence of eukaryotic retroelements, spliceosomal introns and other key components of the spliceosome. Group II introns are found in all three domains of life and are therefore considered to be exceptionally successful mobile genetic elements. Initially identified in organellar genomes, group II introns are found in bacteria, chloroplasts, and mitochondria of plants and fungi, but not in nuclear genomes...
August 14, 2017: Trends in Genetics: TIG
https://www.readbyqxmd.com/read/28813691/effects-of-superabsorbent-polymers-on-the-abundances-of-antibiotic-resistance-genes-mobile-genetic-elements-and-the-bacterial-community-during-swine-manure-composting
#2
Aiyun Guo, Jie Gu, Xiaojuan Wang, Ranran Zhang, Yanan Yin, Wei Sun, Xiaxia Tuo, Li Zhang
Superabsorbent polymers (SAPs) are considered suitable amendments for reducing the selection pressure due to heavy metals and the abundances of antibiotic resistance genes (ARGs) during composting. In this study, three SAP (sodium polyacrylate) levels (0, 5, and 15mgkg(-1) of compost) were applied and their effects on the abundances of ARGs, mobile genetic elements (MGEs), and the bacterial community were investigated. After composting, the abundances of ARGs and MGEs decreased to different extent, where the removal efficiencies for tetW, dfrA7, ermX, aac(6')-ib-cr and MGEs exceeded 90%...
August 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28813520/the-frequency-of-class1-and-2-integrons-in-pseudomonas-aeruginosa-strains-isolated-from-burn-patients-in-a-burn-center-of-ahvaz-iran
#3
Azar Dokht Khosravi, Moloudsadat Motahar, Effat Abbasi Montazeri
BACKGROUND: Pseudomonas aeruginosa is an opportunistic pathogen with the ability to cause severe nosocomial infections and remains a major problem in burn patients. This organism shows a remarkable antimicrobial resistance and is often resistant to multiple antibiotics. Integron genes as mobile genetic elements are playing an important role in the spread of P. aeruginosa antibiotic resistance. This study was aimed to investigate the occurrence of class 1, and 2 integron genes (int1, int2), among P...
2017: PloS One
https://www.readbyqxmd.com/read/28812298/a-gata-type-transcription-factor-acareb-for-nitrogen-metabolism-is-involved-in-regulation-of-cephalosporin-biosynthesis-in-acremonium-chrysogenum
#4
Feifei Guan, Yuanyuan Pan, Jinyang Li, Gang Liu
In filamentous fungi, nitrogen metabolism is repressed by GATA-type zinc finger transcription factors. Nitrogen metabolite repression has been found to affect antibiotic production, but the mechanism is still poorly understood. AcareB, encoding a homologue of fungal GATA-type regulatory protein, was cloned from Acremonium chrysogenum. Gene disruption and genetic complementation demonstrated that AcareB plays a key role in utilization of ammonium, glutamine and urea. In addition, significant reduction of cephalosporin production in the AcareB disruption mutant indicated that AcareB is important for cephalosporin production...
August 14, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28811374/recruitment-of-crispr-cas-systems-by-tn7-like-transposons
#5
Joseph E Peters, Kira S Makarova, Sergey Shmakov, Eugene V Koonin
A survey of bacterial and archaeal genomes shows that many Tn7-like transposons contain minimal type I-F CRISPR-Cas systems that consist of fused cas8f and cas5f, cas7f, and cas6f genes and a short CRISPR array. Several small groups of Tn7-like transposons encompass similarly truncated type I-B CRISPR-Cas. This minimal gene complement of the transposon-associated CRISPR-Cas systems implies that they are competent for pre-CRISPR RNA (precrRNA) processing yielding mature crRNAs and target binding but not target cleavage that is required for interference...
August 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28805485/transcriptional-activity-of-transposable-elements-may-contribute-to-gene-expression-changes-in-the-syncytium-formed-by-cyst-nematode-in-arabidopsis-roots
#6
Sarbottam Piya, Morgan Bennett, Aditi Rambani, Tarek Hewezi
Transposable elements (TEs) are mobile genetic materials that constitute a large fraction of plant genomes. Recent experimental evidences indicate that TEs can play key regulatory roles in controlling the expression of adjacent genes during plant development and stress responses. Nevertheless, information about the transcriptional activity of TEs and their impact on proximal genes during plant-nematode interaction remains largely unknown. Here, we identify of differentially expressed TEs and report their possible influence on the expression of nearby genes during the susceptible interaction between the beet cyst nematode Heterodera schachtii and Arabidopsis thaliana...
August 14, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28802691/the-genome-analysis-of-oleiphilus-messinensis-me102-dsm-13489-t-reveals-backgrounds-of-its-obligate-alkane-devouring-marine-lifestyle
#7
Stepan V Toshchakov, Alexei A Korzhenkov, Tatyana N Chernikova, Manuel Ferrer, Olga V Golyshina, Michail M Yakimov, Peter N Golyshin
Marine bacterium Oleiphilus messinensis ME102 (DSM 13489(T)) isolated from the sediments of the harbor of Messina (Italy) is a member of the order Oceanospirillales, class Gammaproteobacteria, representing the physiological group of marine obligate hydrocarbonoclastic bacteria (OHCB) alongside the members of the genera Alcanivorax, Oleispira, Thalassolituus, Cycloclasticus and Neptunomonas. These organisms play a crucial role in the natural environmental cleanup in marine systems. Despite having the largest genome (6...
August 9, 2017: Marine Genomics
https://www.readbyqxmd.com/read/28800766/examining-non-ltr-retrotransposons-in-the-context-of-the-evolving-primate-brain
#8
REVIEW
Sara B Linker, Maria C Marchetto, Iñigo Narvaiza, Ahmet M Denli, Fred H Gage
Researchers have long sought to understand the genetic basis of the cognitive differences between primates, with particular focus on the human brain. Although all mutational types have worked in concert with evolutionary forces to generate the current human brain, in this review we will explore the impact of mobile elements, specifically non-LTR retrotransposons. Non-LTR retrotransposons have contributed coding and regulatory sequences to the genome throughout evolution. During primate evolution there have been multiple waves of LINE retrotransposition as well as the birth of new mobile elements such as the SINEs Alu and SVA and we will explore what kinds of impacts these may have had on the evolving human brain...
August 11, 2017: BMC Biology
https://www.readbyqxmd.com/read/28800585/comparative-pathogenomics-of-clostridium-tetani
#9
Jonathan E Cohen, Rong Wang, Rong-Fong Shen, Wells W Wu, James E Keller
Clostridium tetani and Clostridium botulinum produce two of the most potent neurotoxins known, tetanus neurotoxin and botulinum neurotoxin, respectively. Extensive biochemical and genetic investigation has been devoted to identifying and characterizing various C. botulinum strains. Less effort has been focused on studying C. tetani likely because recently sequenced strains of C. tetani show much less genetic diversity than C. botulinum strains and because widespread vaccination efforts have reduced the public health threat from tetanus...
2017: PloS One
https://www.readbyqxmd.com/read/28799833/plasmid-mediated-colistin-resistance-gene-mcr-1-in-an-escherichia-coli-st10-bloodstream-isolate-in-the-sultanate-of-oman
#10
Jalila Mohsin, Tibor Pál, Jorgen Eskild Petersen, Dania Darwish, Akela Ghazawi, Tanveer Ashraf, Agnes Sonnevend
AIMS: To identify plasmid-mediated colistin resistance in clinical Enterobacteriaceae isolates in Oman, where this resistance mechanism has not been encountered yet. MATERIALS/METHODS: Twenty-two colistin-resistant Enterobacteriaceae clinical isolates collected between July 2014 and June 2016 in a tertiary care hospital in Muscat were screened by PCR for the mcr-1 and mcr-2 genes. The strain identified as mcr-1 positive was genotyped and its antibiotic susceptibility was established...
August 11, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28798737/complete-genome-analysis-of-thermus-parvatiensis-and-comparative-genomics-of-thermus-spp-provide-insights-into-genetic-variability-and-evolution-of-natural-competence-as-strategic-survival-attributes
#11
Charu Tripathi, Harshita Mishra, Himani Khurana, Vatsala Dwivedi, Komal Kamra, Ram K Negi, Rup Lal
Thermophilic environments represent an interesting niche. Among thermophiles, the genus Thermus is among the most studied genera. In this study, we have sequenced the genome of Thermus parvatiensis strain RL, a thermophile isolated from Himalayan hot water springs (temperature >96°C) using PacBio RSII SMRT technique. The small genome (2.01 Mbp) comprises a chromosome (1.87 Mbp) and a plasmid (143 Kbp), designated in this study as pTP143. Annotation revealed a high number of repair genes, a squeezed genome but containing highly plastic plasmid with transposases, integrases, mobile elements and hypothetical proteins (44%)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28798188/complete-genome-sequence-of-a-livestock-associated-methicillin-resistant-staphylococcus-aureus-sequence-type-5-isolate-from-the-united-states
#12
Samantha J Hau, Darrell O Bayles, David P Alt, Timothy S Frana, Tracy L Nicholson
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) may be the largest MRSA reservoir outside the hospital setting. One concern with LA-MRSA is the acquisition of novel mobile genetic elements by these isolates. Here, we report the complete genome sequence of a swine LA-MRSA sequence type 5 isolate from the United States.
August 10, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28794987/whole-genome-of-klebsiella-aerogenes-px01-isolated-from-san-jacinto-river-sediment-west-of-baytown-texas-reveals-the-presence-of-multiple-antibiotic-resistance-determinants-and-mobile-genetic-elements
#13
Rupa Iyer, Brian Iken, Ashish Damania
Klebsiella aerogenes is a Gram-negative bacterium of the family Enterobacteriaceae which is widely distributed in water, air and soil. It also forms part of the normal microbiota found in human and animal gastrointestinal tracts. Here we report the draft genome sequence (chromosome and 1 plasmid) of K. aerogenes strain PX01 compiled at the scaffold level from 97 contigs totaling 5,262,952 bp. K. aerogenes PX01 was isolated from sediment along the northern face of Burnet Bay west of Baytown, Texas. The nucleotide sequence of this genome was deposited into NCBI GenBank under the accession NJBB00000000...
December 2017: Genomics Data
https://www.readbyqxmd.com/read/28793862/physical-shearing-imparts-biological-activity-to-dna-and-ability-to-transmit-itself-horizontally-across-species-and-kingdom-boundaries
#14
Gorantla Venkata Raghuram, Deepika Gupta, Siddharth Subramaniam, Ashwini Gaikwad, Naveen Kumar Khare, Malcolm Nobre, Naveen Kumar Nair, Indraneel Mittra
BACKGROUND: We have recently reported that cell-free DNA (cfDNA) fragments derived from dying cells that circulate in blood are biologically active molecules and can readily enter into healthy cells to activate DNA damage and apoptotic responses in the recipients. However, DNA is not conventionally known to spontaneously enter into cells or to have any intrinsic biological activity. We hypothesized that cellular entry and acquisition of biological properties are functions of the size of DNA...
August 9, 2017: BMC Molecular Biology
https://www.readbyqxmd.com/read/28783909/an-underappreciated-hotspot-of-antibiotic-resistance-the-groundwater-near-the-municipal-solid-waste-landfill
#15
Qing-Lin Chen, Hu Li, Xin-Yuan Zhou, Yi Zhao, Jian-Qiang Su, Xian Zhang, Fu-Yi Huang
Landfills are so far the most common practice for the disposals of municipal solid waste (MSW) worldwide. Since MSW landfill receives miscellaneous wastes, including unused/expired antibiotics and bioactive wastes, it gradually becomes a huge potential bioreactor for breeding antibiotic resistance. Antibiotic resistance genes (ARGs) in landfill can flow to the environment through leakage of landfill leachate and pose a risk to public health. Using high throughput quantitative Polymerase Chain Reaction (HT-qPCR), we investigated the prevalence, diversity of ARGs and its association with various mobile genetic elements (MGEs) in MSW landfill groundwater...
July 31, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28781980/bacterial-plasmid-addiction-systems-and-their-implications-for-antibiotic-drug-development
#16
Jennifer Tsang
Bacteria frequently carry mobile genetic elements capable of being passed to other bacterial cells. An example of this is the transfer of plasmids (small, circular DNA molecules) that often contain antibiotic resistance genes from one bacterium to another. Plasmids have evolved mechanisms to ensure their survival through generations by employing plasmids segregation and replication machinery and plasmid addiction systems. Plasmid addiction systems utilize a post-segregational killing of cells that have not received a plasmid...
May 2017: Postdoc Journal
https://www.readbyqxmd.com/read/28780361/untreated-urban-waste-contaminates-indian-river-sediments-with-resistance-genes-to-last-resort-antibiotics
#17
Nachiket P Marathe, Chandan Pal, Swapnil S Gaikwad, Viktor Jonsson, Erik Kristiansson, D G Joakim Larsson
Efficient sewage treatment is critical for limiting environmental transmission of antibiotic-resistant bacteria. In many low and middle income countries, however, large proportions of sewage are still released untreated into receiving water bodies. In-depth knowledge of how such discharges of untreated urban waste influences the environmental resistome is largely lacking. Here, we highlight the impact of uncontrolled discharge of partially treated and/or untreated wastewater on the structure of bacterial communities and resistome of sediments collected from Mutha river flowing through Pune city in India...
July 25, 2017: Water Research
https://www.readbyqxmd.com/read/28780258/behavior-of-antibiotic-resistance-genes-during-co-composting-of-swine-manure-with-chinese-medicinal-herbal-residues
#18
Li Zhang, Jie Gu, Xiaojuan Wang, Wei Sun, Yanan Yin, Yixin Sun, Aiyun Guo, Xiaxia Tuo
Swine manure is considered to be a reservoir for antibiotic resistance genes (ARGs) but little is known about the variations in ARGs during the co-composting of swine manure with Chinese medicinal herbal residues (CMHRs). Thus, this study explored the effects of CMHRs on the variations in ARGs during co-composting with swine manure. The results showed that CMHRs could reduce effectively most of the targeted ARGs (0.18-2.82logs) and mobile genetic elements (MGEs) (0.47-3.34logs). The correlations indicated that CMHRs might decrease the spread of ARGs via horizontal gene transfer...
July 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28771139/high-frequency-of-the-combined-presence-of-qrdr-mutations-and-pmqr-determinants-in-multidrug-resistant-klebsiella-pneumoniae-and-escherichia-coli-isolates-from-nosocomial-and-community-acquired-infections
#19
Bruna Fuga Araújo, Paola Amaral de Campos, Sabrina Royer, Melina Lorraine Ferreira, Iara Rossi Gonçalves, Deivid William da Fonseca Batistão, Daiane Silva Resende, Cristiane Silveira de Brito, Paulo Pinto Gontijo-Filho, Rosineide Marques Ribas
Plasmid-mediated quinolone resistance (PMQR) determinants combined with mutations in quinolone resistance-determining regions (QRDRs) and clonal dissemination were investigated in 40 fluoroquinolone-resistant Klebsiellapneumoniae and Escherichiacoli isolates from nosocomial and community-acquired infections. We observed nucleotide substitutions in gyrA (Ser83Ile, Val37Leu, Lys154Arg, Ser171Ala, Ser19Asn, Ile198Val, Ser83Tyr, Ser83Leu, Asp87Asn and Asp87Gly) and parC genes (Ser80Ile, Glu84Lys, Ala129Ser, Val141Ala and Glu84Gly)...
August 4, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28763642/fate-of-antibiotic-resistance-genes-and-their-associations-with-bacterial-community-in-livestock-breeding-wastewater-and-its-receiving-river-water
#20
Shuyu Jia, Xu-Xiang Zhang, Yu Miao, Yanting Zhao, Lin Ye, Bing Li, Tong Zhang
Large amounts of antibiotics are currently used in livestock breeding, which is the main driving factor contributing to the occurrence, spread and proliferation of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in the environment. In this study, high-throughput sequencing based metagenomic approaches were employed to characterize the tempo-spacial changes of antibiotic resistome, bacterial community and their correlations in pig farming wastewater and its receiving river. A total of 194 ARG subtypes within 14 ARG types were detectable in all the samples, and their total relative abundance increased in the river water after receiving wastewater discharge, while decreased in the downstream river water...
July 24, 2017: Water Research
keyword
keyword
102088
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"