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https://www.readbyqxmd.com/read/28346710/the-arabidopsis-thiamin-deficient-mutant-pale-green1-lacks-thiamin-monophosphate-phosphatase-of-the-vitamin-b1-biosynthesis-pathway
#1
Wei-Yu Hsieh, Jo-Chien Liao, Hsin-Tzu Wang, Tzu-Huan Hung, Ching-Chih Tseng, Tsui-Yun Chung, Ming-Hsiun Hsieh
Thiamin diphosphate (TPP, vitamin B1) is an essential coenzyme present in all organisms. Animals obtain TPP from their diets, but plants synthesize TPP de novo. We isolated and characterized an Arabidopsis pale green1 (pale1) mutant that contained higher concentrations of thiamin monophosphate (TMP) and less thiamin and TPP than the wild type. Supplementation with thiamin, but not the thiazole and pyrimidine precursors, rescued the mutant phenotype, indicating that the pale1 mutant is a thiamin-deficient mutant...
March 27, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28346477/disruption-of-sorcs2-reveals-differences-in-the-regulation-of-stereociliary-bundle-formation-between-hair-cell-types-in-the-inner-ear
#2
Andrew Forge, Ruth R Taylor, Sally J Dawson, Michael Lovett, Daniel J Jagger
Behavioural anomalies suggesting an inner ear disorder were observed in a colony of transgenic mice. Affected animals were profoundly deaf. Severe hair bundle defects were identified in all outer and inner hair cells (OHC, IHC) in the cochlea and in hair cells of vestibular macular organs, but hair cells in cristae were essentially unaffected. Evidence suggested the disorder was likely due to gene disruption by a randomly inserted transgene construct. Whole-genome sequencing identified interruption of the SorCS2 (Sortilin-related VPS-10 domain containing protein) locus...
March 27, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28346448/a-footprint-of-desiccation-tolerance-in-the-genome-of-xerophyta-viscosa
#3
Maria-Cecília D Costa, Mariana A S Artur, Julio Maia, Eef Jonkheer, Martijn F L Derks, Harm Nijveen, Brett Williams, Sagadevan G Mundree, José M Jiménez-Gómez, Thamara Hesselink, Elio G W M Schijlen, Wilco Ligterink, Melvin J Oliver, Jill M Farrant, Henk W M Hilhorst
Desiccation tolerance is common in seeds and various other organisms, but only a few angiosperm species possess vegetative desiccation tolerance. These 'resurrection species' may serve as ideal models for the ultimate design of crops with enhanced drought tolerance. To understand the molecular and genetic mechanisms enabling vegetative desiccation tolerance, we produced a high-quality whole-genome sequence for the resurrection plant Xerophyta viscosa and assessed transcriptome changes during its dehydration...
March 27, 2017: Nature Plants
https://www.readbyqxmd.com/read/28346445/potential-energy-landscapes-identify-the-information-theoretic-nature-of-the-epigenome
#4
Garrett Jenkinson, Elisabet Pujadas, John Goutsias, Andrew P Feinberg
Epigenetics is the study of biochemical modifications carrying information independent of DNA sequence, which are heritable through cell division. In 1940, Waddington coined the term "epigenetic landscape" as a metaphor for pluripotency and differentiation, but methylation landscapes have not yet been rigorously computed. Using principles from statistical physics and information theory, we derive epigenetic energy landscapes from whole-genome bisulfite sequencing (WGBS) data that enable us to quantify methylation stochasticity genome-wide using Shannon's entropy, associating it with chromatin structure...
March 27, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28346444/genetic-variants-associated-with-mosaic-y-chromosome-loss-highlight-cell-cycle-genes-and-overlap-with-cancer-susceptibility
#5
Daniel J Wright, Felix R Day, Nicola D Kerrison, Florian Zink, Alexia Cardona, Patrick Sulem, Deborah J Thompson, Svanhvit Sigurjonsdottir, Daniel F Gudbjartsson, Agnar Helgason, J Ross Chapman, Steve P Jackson, Claudia Langenberg, Nicholas J Wareham, Robert A Scott, Unnur Thorsteindottir, Ken K Ong, Kari Stefansson, John R B Perry
The Y chromosome is frequently lost in hematopoietic cells, which represents the most common somatic alteration in men. However, the mechanisms that regulate mosaic loss of chromosome Y (mLOY), and its clinical relevance, are unknown. We used genotype-array-intensity data and sequence reads from 85,542 men to identify 19 genomic regions (P < 5 × 10(-8)) that are associated with mLOY. Cumulatively, these loci also predicted X chromosome loss in women (n = 96,123; P = 4 × 10(-6)). Additional epigenome-wide methylation analyses using whole blood highlighted 36 differentially methylated sites associated with mLOY...
March 27, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28345647/sexual-epigenetics-gender-specific-methylation-of-a-gene-in-the-sex-determining-region-of-populus-balsamifera
#6
Katharina Bräutigam, Raju Soolanayakanahally, Marc Champigny, Shawn Mansfield, Carl Douglas, Malcolm M Campbell, Quentin Cronk
Methylation has frequently been implicated in gender determination in plants. The recent discovery of the sex determining region (SDR) of balsam poplar, Populus balsamifera, pinpointed 13 genes with differentiated X and Y copies. We tested these genes for differential methylation using whole methylome sequencing of xylem tissue of multiple individuals grown under field conditions in two common gardens. The only SDR gene to show a marked pattern of gender-specific methylation is PbRR9, a member of the two component response regulator (type-A) gene family, involved in cytokinin signalling...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345639/genomic-characterization-of-nontuberculous-mycobacteria
#7
Tarcisio Fedrizzi, Conor J Meehan, Antonella Grottola, Elisabetta Giacobazzi, Giulia Fregni Serpini, Sara Tagliazucchi, Anna Fabio, Clotilde Bettua, Roberto Bertorelli, Veronica De Sanctis, Fabio Rumpianesi, Monica Pecorari, Olivier Jousson, Enrico Tortoli, Nicola Segata
Mycobacterium tuberculosis and Mycobacterium leprae have remained, for many years, the primary species of the genus Mycobacterium of clinical and microbiological interest. The other members of the genus, referred to as nontuberculous mycobacteria (NTM), have long been underinvestigated. In the last decades, however, the number of reports linking various NTM species with human diseases has steadily increased and treatment difficulties have emerged. Despite the availability of whole genome sequencing technologies, limited effort has been devoted to the genetic characterization of NTM species...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345240/prenatal-dna-sequencing-clinical-counseling-and-diagnostic-laboratory-considerations
#8
Ahmad N Abou Tayoun, Nancy B Spinner, Heidi L Rehm, Robert C Green, Diana W Bianchi
Clinical diagnostic laboratories are producing next generation sequencing (NGS)-based test results that are becoming increasingly incorporated into patient care. Whole genome and exome sequencing on fetal material derived from amniocytes, chorionic villi, or products of conception is starting to be offered clinically in specialized centers, but it has not yet become routine practice. The technical, interpretation and ethical challenges are greatest in the area of prenatal medicine because the fetus has a limited health history and the physical examination is only indirectly available via prenatal sonography...
March 27, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28344890/suppression-of-indoleamine-2-3-dioxygenase-1-expression-by-promoter-hypermethylation-in-er-positive-breast-cancer
#9
Dyah L Dewi, Soumya R Mohapatra, Saioa Blanco Cabañes, Isabell Adam, Luis F Somarribas Patterson, Bianca Berdel, Masroor Kahloon, Loreen Thürmann, Stefanie Loth, Katharina Heilmann, Dieter Weichenhan, Oliver Mücke, Ines Heiland, Pauline Wimberger, Jan Dominik Kuhlmann, Karl-Heinz Kellner, Sarah Schott, Christoph Plass, Michael Platten, Clarissa Gerhäuser, Saskia Trump, Christiane A Opitz
Kynurenine formation by tryptophan-catabolic indoleamine-2,3-dioxygenase 1 (IDO1) plays a key role in tumor immune evasion and inhibition of IDO1 is efficacious in preclinical models of breast cancer. As the response of breast cancer to immune checkpoint inhibitors may be limited, a better understanding of the expression of additional targetable immunomodulatory pathways is of importance. We therefore investigated the regulation of IDO1 expression in different breast cancer subtypes. We identified estrogen receptor α (ER) as a negative regulator of IDO1 expression...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28344519/assessment-of-repli-g-multiple-displacement-whole-genome-amplification-wga-techniques-for-metagenomic-applications
#10
Sofia Ahsanuddin, Ebrahim Afshinnekoo, Jorge Gandara, Mustafa Hakyemezoğlu, Daniela Bezdan, Samuel Minot, Nick Greenfield, Christopher E Mason
Amplification of minute quantities of DNA is a fundamental challenge in low-biomass metagenomic and microbiome studies because of potential biases in coverage, guanine-cytosine (GC) content, and altered species abundances. Whole genome amplification (WGA), although widely used, is notorious for introducing artifact sequences, either by amplifying laboratory contaminants or by nonrandom amplification of a sample's DNA. In this study, we investigate the effect of REPLI-g multiple displacement amplification (MDA; Qiagen, Valencia, CA, USA) on sequencing data quality and species abundance detection in 8 paired metagenomic samples and 1 titrated, mixed control sample...
March 21, 2017: Journal of Biomolecular Techniques: JBT
https://www.readbyqxmd.com/read/28344109/phylogenomic-proximity-and-metabolic-discrepancy-of-methanosarcina-mazei-go1-across-methanosarcinal-genomes
#11
M Bharathi, P Chellapandi
Methanosarcina mazei Go1 is a heterotrophic methanogenic archaean contributing a significant role in global methane cycling and biomethanation process. Phylogenomic relatedness and metabolic discrepancy of this genome were described herein by comparing its whole genome sequence, intergenomic distance, genome function, synteny homologs and origin of replication, and marker genes with very closely related genomes, Methanosarcina acetivorans and Methanosarcina barkeri. Phylogenomic analysis of this study revealed that genome functional feature and metabolic core of M...
March 23, 2017: Bio Systems
https://www.readbyqxmd.com/read/28344011/the-epidemiology-pathogenesis-transmission-diagnosis-and-management-of-multidrug-resistant-extensively-drug-resistant-and-incurable-tuberculosis
#12
REVIEW
Keertan Dheda, Tawanda Gumbo, Gary Maartens, Kelly E Dooley, Ruth McNerney, Megan Murray, Jennifer Furin, Edward A Nardell, Leslie London, Erica Lessem, Grant Theron, Paul van Helden, Stefan Niemann, Matthias Merker, David Dowdy, Annelies Van Rie, Gilman K H Siu, Jotam G Pasipanodya, Camilla Rodrigues, Taane G Clark, Frik A Sirgel, Aliasgar Esmail, Hsien-Ho Lin, Sachin R Atre, H Simon Schaaf, Kwok Chiu Chang, Christoph Lange, Payam Nahid, Zarir F Udwadia, C Robert Horsburgh, Gavin J Churchyard, Dick Menzies, Anneke C Hesseling, Eric Nuermberger, Helen McIlleron, Kevin P Fennelly, Eric Goemaere, Ernesto Jaramillo, Marcus Low, Carolina Morán Jara, Nesri Padayatchi, Robin M Warren
Global tuberculosis incidence has declined marginally over the past decade, and tuberculosis remains out of control in several parts of the world including Africa and Asia. Although tuberculosis control has been effective in some regions of the world, these gains are threatened by the increasing burden of multidrug-resistant (MDR) and extensively drug-resistant (XDR) tuberculosis. XDR tuberculosis has evolved in several tuberculosis-endemic countries to drug-incurable or programmatically incurable tuberculosis (totally drug-resistant tuberculosis)...
March 15, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28343847/global-developmental-delay-and-intellectual-disability-associated-with-a-de-novo-top2b-mutation
#13
Ching-Wan Lam, Wai-Lan Yeung, Chun-Yiu Law
BACKGROUND: More than 100 genes had been identified for autism spectrum disorder (ASD). With the advancement of whole-exome/genome sequencing (WES/WGS), disease-causing gene in ASD can be identified in a holistic and unbiased approach. The identification of new ASD genes can further explore the molecular basis of ASD. METHODS: We report a 15yo girl with developmental delay, intellectual disability, hypotonia, microcephaly and autistic feature. She first presented at 6months old with primitive response to noise...
March 23, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28343239/improved-full-length-killer-cell-immunoglobulin-like-receptor-transcript-discovery-in-mauritian-cynomolgus-macaques
#14
Trent M Prall, Michael E Graham, Julie A Karl, Roger W Wiseman, Adam J Ericsen, Muthuswamy Raveendran, R Alan Harris, Donna M Muzny, Richard A Gibbs, Jeffrey Rogers, David H O'Connor
Killer cell immunoglobulin-like receptors (KIRs) modulate disease progression of pathogens including HIV, malaria, and hepatitis C. Cynomolgus and rhesus macaques are widely used as nonhuman primate models to study human pathogens, and so, considerable effort has been put into characterizing their KIR genetics. However, previous studies have relied on cDNA cloning and Sanger sequencing that lack the throughput of current sequencing platforms. In this study, we present a high throughput, full-length allele discovery method utilizing Pacific Biosciences circular consensus sequencing (CCS)...
March 25, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28343122/genetic-and-epigenetic-variation-of-transposable-elements-in-arabidopsis
#15
REVIEW
Charles J Underwood, Ian R Henderson, Robert A Martienssen
Transposable elements are mobile genetic elements that are prevalent in plant genomes and are silenced by epigenetic modification. Different epigenetic modification pathways play distinct roles in the control of transposable element transcription, replication and recombination. The Arabidopsis genome contains families of all of the major transposable element classes, which are differentially enriched in particular genomic regions. Whole genome sequencing and DNA methylation profiling of hundreds of natural Arabidopsis accessions has revealed that transposable elements exhibit significant intraspecific genetic and epigenetic variation, and that genetic variation often underlies epigenetic variation...
March 23, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28341681/chromosome-encoded-hemolysin-phospholipase-and-collagenase-contribute-to-virulence-for-fish-in-plasmidless-isolates-of-photobacterium-damselae-subsp-damselae
#16
Ana Vences, Amable J Rivas, Manuel L Lemos, Matthias Husmann, Carlos R Osorio
Photobacterium damselae subsp. damselae is a pathogen of marine animals including fish of importance in aquaculture. The virulence plasmid pPHDD1, characteristic of highly hemolytic isolates, encodes the hemolysins damselysin (Dly) and phobalysin (PhlyP). Strains lacking pPHDD1 constitute the vast majority of the isolates from fish outbreaks, but genetic studies to identify virulence factors in plasmidless strains are scarce. Here we show that the chromosome-I encoded hemolysin PhlyC plays a role in virulence and cell toxicity in pPHDD1-negative isolates of this pathogen...
March 24, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28341546/co-circulation-of-two-usutu-virus-strains-in-northern-italy-between-2009-and-2014
#17
Mattia Calzolari, Chiara Chiapponi, Paolo Bonilauri, Davide Lelli, Laura Baioni, Ilaria Barbieri, Antonio Lavazza, Stefano Pongolini, Michele Dottori, Ana Moreno
Usutu virus is an arbovirus closely related to West Nile virus (genus Flavivirus), which circulates between mosquitoes and wild birds. This virus has been increasingly reported in Europe, raising concerns for its possible pathogenic potential for wild birds and humans. This study reports the whole genome sequences of 15 strains of USUV, isolated between 2010 and 2014 from mosquitoes and wild birds in the course of West Nile virus surveillance in the Emilia-Romagna and Lombardy regions of Northern Italy. Both whole and 656 partial genome sequences, obtained from isolated viruses and field samples (mosquitoes and wild birds), were analyzed to describe the temporal and geographical spread of USUV in the surveyed area...
March 21, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28341545/novel-putative-bluetongue-virus-in-healthy-goats-from-sardinia-italy
#18
Giovanni Savini, Giantonella Puggioni, Giorgio Meloni, Maurilia Marcacci, Marco Di Domenico, Angela Maria Rocchigiani, Massimo Spedicato, Annalisa Oggiano, Daniela Manunta, Liana Teodori, Alessandra Leone, Ottavio Portanti, Francesca Cito, Annamaria Conte, Massimiliano Orsini, Cesare Cammà, Paolo Calistri, Armando Giovannini, Alessio Lorusso
In recent years, novel Bluetongue virus (BTV) serotypes have been isolated and/or sequenced by researchers within the field. During Bluetongue surveillance activities, we identified a putative novel BTV serotype in healthy goats from Sardinia, Italy. RNAs purified from blood and serum samples were positive for BTV by a generic real time RT-PCR and c-ELISA, respectively, whereas genotyping and serotyping were unsuccessful. By NGS, the whole genome sequence was obtained from two blood samples (BTV-X ITL2015 strains 34200 and 33531)...
March 21, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28340599/dna-methylation-changes-at-infertility-genes-in-newborn-twins-conceived-by-in-vitro-fertilisation
#19
Juan E Castillo-Fernandez, Yuk Jing Loke, Sebastian Bass-Stringer, Fei Gao, Yudong Xia, Honglong Wu, Hanlin Lu, Yuan Liu, Jun Wang, Tim D Spector, Richard Saffery, Jeffrey M Craig, Jordana T Bell
BACKGROUND: The association of in vitro fertilisation (IVF) and DNA methylation has been studied predominantly at regulatory regions of imprinted genes and at just thousands of the ~28 million CpG sites in the human genome. METHODS: We investigated the links between IVF and DNA methylation patterns in whole cord blood cells (n = 98) and cord blood mononuclear cells (n = 82) from newborn twins using genome-wide methylated DNA immunoprecipitation coupled with deep sequencing...
March 24, 2017: Genome Medicine
https://www.readbyqxmd.com/read/28340563/genome-evolutionary-dynamics-followed-by-diversifying-selection-explains-the-complexity-of-the-sesamum-indicum-genome
#20
Jingyin Yu, Linhai Wang, Hui Guo, Boshou Liao, Graham King, Xiurong Zhang
BACKGROUND: Whole genome duplication (WGD) and tandem duplication (TD) provide two critical sources of raw genetic material for genome complexity and evolutionary novelty. Little is known about the complexity of the Sesamum indicum genome after it diverged from a common ancestor with the paleodiploid Vitis vinifera and further experienced WGD and TD events. RESULTS: Here, we analyzed the functional divergence of different classes of inter- and intra-genome gene pairs from ancestral events to uncover multiple-layers of evolutionary dynamics acting during the process of forming the modern S...
March 24, 2017: BMC Genomics
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