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https://www.readbyqxmd.com/read/27915479/trends-in-next-generation-sequencing-and-a-new-era-for-whole-genome-sequencing
#1
REVIEW
Sang Tae Park, Jayoung Kim
This article is a mini-review that provides a general overview for next-generation sequencing (NGS) and introduces one of the most popular NGS applications, whole genome sequencing (WGS), developed from the expansion of human genomics. NGS technology has brought massively high throughput sequencing data to bear on research questions, enabling a new era of genomic research. Development of bioinformatic software for NGS has provided more opportunities for researchers to use various applications in genomic fields...
November 2016: International Neurourology Journal
https://www.readbyqxmd.com/read/27915180/self-primed-isothermal-amplification-for-genomic-dna-detection-of-human-papillomavirus
#2
Wei Lu, Qingpan Yuan, Zhiliu Yang, Bo Yao
Rolling circle amplification (RCA) is an isothermal amplification technique with high efficiency and perfect accuracy for nucleic acids detection. However, RCA technique suffers the limitation to detect short DNA or RNA molecules. For long nucleic acid molecules, enzymatic restriction as well as heat denaturation process is usually required, which makes the amplification not effective and strictly isothermal. In this article, a simple and efficient one-pot self-primed isothermal amplification (SIA) was developed for detection of genomic DNA directly based on the combination of nicking endonuclease assisted strand displacement amplification (SDA) and exponential RCA...
October 10, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27915106/insights-gained-from-ancient-biomolecules-into-past-and-present-tuberculosis-a-personal-perspective
#3
REVIEW
Helen D Donoghue
Ancient and historical tuberculosis (TB) can be recognized by its typical paleopathology in human remains. Using paleomicrobiology, it is possible to detect many more individuals infected with TB but with no visible lesions. Due to advances in molecular analysis over the past two decades, it is clear that TB was widespread in humans from the Neolithic period until the present day. Past human populations were associated with different lineages of the Mycobacterium tuberculosis (MTB) complex, thereby elucidating early human migrations...
November 30, 2016: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/27914204/the-genetic-architecture-of-tristyly-and-its-breakdown-to-self-fertilization
#4
Ramesh Arunkumar, Wei Wang, Stephen I Wright, Spencer C H Barrett
The floral polymorphism tristyly involves three style morphs with a reciprocal arrangement of stigma and anther heights governed by two diallelic loci (S and M). Tristyly functions to promote cross-pollination, but modifications to stamen position commonly cause transitions to selfing. Here, we integrate whole genome sequencing and genetic mapping to investigate the genetic architecture of the M locus and the genetic basis of independent transitions to selfing in tristylous Eichhornia paniculata. We crossed independently derived semi-homostylous selfing variants of the long- and mid-styled morph fixed for alternate alleles at the M locus (ssmm and ssMM, respectively) and backcrossed the F1 to the parental ssmm genotype...
December 3, 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27914076/reconstructing-the-ancestral-relationships-between-bacterial-pathogen-genomes
#5
Caitlin Collins, Xavier Didelot
Following recent developments in DNA sequencing technology, it is now possible to sequence hundreds of whole genomes from bacterial isolates at relatively low cost. Analyzing this growing wealth of genomic data in terms of ancestral relationships can reveal many interesting aspects of the evolution, ecology, and epidemiology of bacterial pathogens. However, reconstructing the ancestry of a sample of bacteria remains challenging, especially for the majority of species where recombination is frequent. Here, we review and describe the computational techniques currently available to infer ancestral relationships, including phylogenetic methods that either ignore or account for the effect of recombination, as well as model-based and model-free phylogeny-independent approaches...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27913844/global-dna-methylation-profiling-of-manganese-exposed-human-neuroblastoma-sh-sy5y-cells-reveals-epigenetic-alterations-in-parkinson-s-disease-associated-genes
#6
Prashant Tarale, Saravanadevi Sivanesan, Atul P Daiwile, Reinhard Stöger, Amit Bafana, Pravin K Naoghare, Devendra Parmar, Tapan Chakrabarti, Krishnamurthi Kannan
Manganese (Mn) is an essential trace element required for optimal functioning of cellular biochemical pathways in the central nervous system. Elevated exposure to Mn through environmental and occupational exposure can cause neurotoxic effects resulting in manganism, a condition with clinical symptoms identical to idiopathic Parkinson's disease. Epigenetics is now recognized as a biological mechanism involved in the etiology of various diseases. Here, we investigated the role of DNA methylation alterations induced by chronic Mn (100 µM) exposure in human neuroblastoma (SH-SY5Y) cells in relevance to Parkinson's disease...
December 2, 2016: Archives of Toxicology
https://www.readbyqxmd.com/read/27913274/two-grass-carp-ctenopharyngodon-idella-insulin-like-growth-factor-binding-protein-5-genes-exhibit-different-yet-conserved-functions-in-development-and-growth
#7
Guo-Dong Zheng, Chun-Xue Zhou, Si-Tong Lin, Jie Chen, Xia-Yun Jiang, Shu-Ming Zou
Insulin-like growth factor binding-protein 5 (igfbp5), the most conserved member of the IGFBP family in vertebrates, plays a critical role in controlling cell survival, growth, differentiation, and apoptosis. Here, we characterized the expression patterns of igfbp5a and igfbp5b in grass carp (Ctenopharyngodon idella), which are retained in many fish species, likely from the teleost-specific whole-genome duplication. Both igfbp5a and igfbp5b encode 268- and 263-aa peptides, respectively, which share a sequence identity of 71%...
November 29, 2016: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/27912842/the-rapid-spread-of-carbapenem-resistant-enterobacteriaceae
#8
REVIEW
Robert F Potter, Alaric W D'Souza, Gautam Dantas
Carbapenems, our one-time silver bullet for multidrug resistant bacterial infections, are now threatened by widespread dissemination of carbapenem-resistant Enterobacteriaceae (CRE). Successful expansion of Enterobacteriaceae clonal groups and frequent horizontal gene transfer of carbapenemase expressing plasmids are causing increasing carbapenem resistance. Recent advances in genetic and phenotypic detection facilitate global surveillance of CRE diversity and prevalence. In particular, whole genome sequencing enabled efficient tracking, annotation, and study of genetic elements colocalized with carbapenemase genes on chromosomes and on plasmids...
November 2016: Drug Resistance Updates: Reviews and Commentaries in Antimicrobial and Anticancer Chemotherapy
https://www.readbyqxmd.com/read/27912758/emerging-polymorphisms-in-falciparum-kelch-13-gene-in-northeastern-region-of-india
#9
Neelima Mishra, Ram Suresh Bharti, Prashant Mallick, Om Prakash Singh, Bina Srivastava, Roma Rana, Sobhan Phookan, Hardev Prasad Gupta, Pascal Ringwald, Neena Valecha
BACKGROUND: Recent reports of emergence and spread of artemisinin resistance in the Southeast Asia region, including Myanmar, pose a greater threat to malaria control and elimination in India. Whole genome sequencing studies have associated mutations in the K13 propeller gene (k13), PF3D7_1343700 with artemisinin resistance both in vitro and in vivo. The aim of the present study was to find the k13 gene polymorphisms in Plasmodium falciparum parasites from the three sites in the Northeast region of India, bordering Bangladesh and Myanmar...
December 3, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27912743/str-realigner-a-realignment-method-for-short-tandem-repeat-regions
#10
Kaname Kojima, Yosuke Kawai, Kazuharu Misawa, Takahiro Mimori, Masao Nagasaki
BACKGROUND: In the estimation of repeat numbers in a short tandem repeat (STR) region from high-throughput sequencing data, two types of strategies are mainly taken: a strategy based on counting repeat patterns included in sequence reads spanning the region and a strategy based on estimating the difference between the actual insert size and the insert size inferred from paired-end reads. The quality of sequence alignment is crucial, especially in the former approaches although usual alignment methods have difficulty in STR regions due to insertions and deletions caused by the variations of repeat numbers...
December 3, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27912731/predicting-the-recurrence-of-noncoding-regulatory-mutations-in-cancer
#11
Woojin Yang, Hyoeun Bang, Kiwon Jang, Min Kyung Sung, Jung Kyoon Choi
BACKGROUND: One of the greatest challenges in cancer genomics is to distinguish driver mutations from passenger mutations. Whereas recurrence is a hallmark of driver mutations, it is difficult to observe recurring noncoding mutations owing to a limited amount of whole-genome sequenced samples. Hence, it is required to develop a method to predict potentially recurrent mutations. RESULTS: In this work, we developed a random forest classifier that predicts regulatory mutations that may recur based on the features of the mutations repeatedly appearing in a given cohort...
December 3, 2016: BMC Bioinformatics
https://www.readbyqxmd.com/read/27912729/genomic-insights-from-whole-genome-sequencing-of-four-clonal-outbreak-campylobacter-jejuni-assessed-within-the-global-c-jejuni-population
#12
Clifford G Clark, Chrystal Berry, Matthew Walker, Aaron Petkau, Dillon O R Barker, Cai Guan, Aleisha Reimer, Eduardo N Taboada
BACKGROUND: Whole genome sequencing (WGS) is useful for determining clusters of human cases, investigating outbreaks, and defining the population genetics of bacteria. It also provides information about other aspects of bacterial biology, including classical typing results, virulence, and adaptive strategies of the organism. Cell culture invasion and protein expression patterns of four related multilocus sequence type 21 (ST21) C. jejuni isolates from a significant Canadian water-borne outbreak were previously associated with the presence of a CJIE1 prophage...
December 3, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27912315/genetics-of-infectious-and-inflammatory-diseases-overlapping-discoveries-from-association-and-exome-sequencing-studies
#13
David Langlais, Nassima Fodil, Philippe Gros
Genome technologies have defined a complex genetic architecture in major infectious, inflammatory, and autoimmune disorders. High density marker arrays and Immunochips have powered genome-wide association studies (GWAS) that have mapped nearly 450 genetic risk loci in 22 major inflammatory diseases, including a core of common genes that play a central role in pathological inflammation. Whole-exome and whole-genome sequencing have identified more than 265 genes in which mutations cause primary immunodeficiencies and rare forms of severe inflammatory bowel disease...
December 1, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27911848/global-analysis-of-genomic-instability-caused-by-dna-replication-stress-in-saccharomyces-cerevisiae
#14
Dao-Qiong Zheng, Ke Zhang, Xue-Chang Wu, Piotr A Mieczkowski, Thomas D Petes
DNA replication stress (DRS)-induced genomic instability is an important factor driving cancer development. To understand the mechanisms of DRS-associated genomic instability, we measured the rates of genomic alterations throughout the genome in a yeast strain with lowered expression of the replicative DNA polymerase δ. By a genetic test, we showed that most recombinogenic DNA lesions were introduced during S or G2 phase, presumably as a consequence of broken replication forks. We observed a high rate of chromosome loss, likely reflecting a reduced capacity of the low-polymerase strains to repair double-stranded DNA breaks (DSBs)...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27911846/dna-methylome-of-the-20-gigabase-norway-spruce-genome
#15
Israel Ausin, Suhua Feng, Chaowei Yu, Wanlu Liu, Hsuan Yu Kuo, Elise L Jacobsen, Jixian Zhai, Javier Gallego-Bartolome, Lin Wang, Ulrika Egertsdotter, Nathaniel R Street, Steven E Jacobsen, Haifeng Wang
DNA methylation plays important roles in many biological processes, such as silencing of transposable elements, imprinting, and regulating gene expression. Many studies of DNA methylation have shown its essential roles in angiosperms (flowering plants). However, few studies have examined the roles and patterns of DNA methylation in gymnosperms. Here, we present genome-wide high coverage single-base resolution methylation maps of Norway spruce (Picea abies) from both needles and somatic embryogenesis culture cells via whole genome bisulfite sequencing...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27910939/real-time-pcr-based-serotyping-of-streptococcus-agalactiae
#16
Kathleen M Breeding, Bhavana Ragipani, Kun-Uk David Lee, Martin Malik, Tara M Randis, Adam J Ratner
Group B Streptococcus (GBS) is an encapsulated, gram-positive pathogen that is an important cause of neonatal invasive infections, including sepsis and meningitis. There are ten known GBS serotypes based on distinct capsule compositions (Ia, Ib, II-IX), and current candidate capsular polysaccharide conjugate vaccines target only a subset of these. Serotyping of GBS isolates is important for understanding local epidemiology and for monitoring for serotype replacement or capsular switching. However, serotyping generally requires either latex agglutination, multiplex PCR with analysis of band sizes, or analysis of whole genome sequences-all techniques that are either expensive or not widely available...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910897/genomic-variations-leading-to-alterations-in-cell-morphology-of-campylobacter-spp
#17
Diane Esson, Alison E Mather, Eoin Scanlan, Srishti Gupta, Stefan P W de Vries, David Bailey, Simon R Harris, Trevelyan J McKinley, Guillaume Méric, Sophia K Berry, Pietro Mastroeni, Samuel K Sheppard, Graham Christie, Nicholas R Thomson, Julian Parkhill, Duncan J Maskell, Andrew J Grant
Campylobacter jejuni, the most common cause of bacterial diarrhoeal disease, is normally helical. However, it can also adopt straight rod, elongated helical and coccoid forms. Studying how helical morphology is generated, and how it switches between its different forms, is an important objective for understanding this pathogen. Here, we aimed to determine the genetic factors involved in generating the helical shape of Campylobacter. A C. jejuni transposon (Tn) mutant library was screened for non-helical mutants with inconsistent results...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910721/care-delivery-considerations-for-widespread-and-equitable-implementation-of-inherited-cancer-predisposition-testing
#18
Deborah Cragun, Anita Y Kinney, Tuya Pal
DNA sequencing advances through next-generation sequencing (NGS) and several practice changing events, have led to shifting paradigms for inherited cancer predisposition testing. These changes necessitated a means by which to maximize health benefits without unnecessarily inflating healthcare costs and exacerbating health disparities. Areas covered: NGS-based tests encompass multi-gene panel tests, whole exome sequencing, and whole genome sequencing, all of which test for multiple genes simultaneously, compared to prior sequencing practices through which testing was performed sequentially for one or two genes...
December 2, 2016: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/27910131/whole-exome-association-of-rare-deletions-in-multiplex-oral-cleft-families
#19
Jack Fu, Terri H Beaty, Alan F Scott, Jacqueline Hetmanski, Margaret M Parker, Joan E Bailey Wilson, Mary L Marazita, Elisabeth Mangold, Hasan Albacha-Hejazi, Jeffrey C Murray, Alexandre Bureau, Jacob Carey, Stephen Cristiano, Ingo Ruczinski, Robert B Scharpf
By sequencing the exomes of distantly related individuals in multiplex families, rare mutational and structural changes to coding DNA can be characterized and their relationship to disease risk can be assessed. Recently, several rare single nucleotide variants (SNVs) were associated with an increased risk of nonsyndromic oral cleft, highlighting the importance of rare sequence variants in oral clefts and illustrating the strength of family-based study designs. However, the extent to which rare deletions in coding regions of the genome occur and contribute to risk of nonsyndromic clefts is not well understood...
December 1, 2016: Genetic Epidemiology
https://www.readbyqxmd.com/read/27909932/complete-nucleotide-sequences-of-seven-soybean-mosaic-viruses-smv-isolated-from-wild-soybeans-glycine-soja-in-china
#20
Yun-Xia Chen, Mian Wu, Fang-Fang Ma, Jian-Qun Chen, Bin Wang
Soybean mosaic virus (SMV) is a devastating plant virus classified in the family Potyviridae, and known to infect cultivated soybeans (Glycine max). In this study, seven new SMVs were isolated from wild soybean samples and analyzed by whole-genome sequencing. An updated SMV phylogeny was built with the seven new and 83 known SMV genomic sequences. Results showed that three northeastern SMV isolates were distributed in clade III and IV, while four southern SMVs were grouped together in clade II and all contained a recombinant BCMV fragment (~900 bp) in the upstream part of the genome...
December 1, 2016: Archives of Virology
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