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https://www.readbyqxmd.com/read/28225906/the-current-status-of-the-lutzomyia-longipalpis-diptera-psychodidae-phlebotominae-species-complex
#1
Nataly A Souza, Reginaldo P Brazil, Alejandra S Araki
Lutzomyia longipalpis s.l. is a complex of sibling species and is the principal vector of American visceral leishmaniasis. The present review summarises the diversity of efforts that have been undertaken to elucidate the number of unnamed species in this species complex and the phylogenetic relationships among them. A wide variety of evidence, including chemical, behavioral and molecular traits, suggests very recent speciation events and complex population structure in this group. Although significant advances have been achieved to date, differential vector capacity and the correlation between structure of parasite and vector populations have yet to be elucidated...
March 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28225773/whole-genome-duplication-and-molecular-evolution-in-cornus-l-cornaceae-insights-from-transcriptome-sequences
#2
Yan Yu, Qiuyun Xiang, Paul S Manos, Douglas E Soltis, Pamela S Soltis, Bao-Hua Song, Shifeng Cheng, Xin Liu, Gane Wong
The pattern and rate of genome evolution have profound consequences in organismal evolution. Whole-genome duplication (WGD), or polyploidy, has been recognized as an important evolutionary mechanism of plant diversification. However, in non-model plants the molecular signals of genome duplications have remained largely unexplored. High-throughput transcriptome data from next-generation sequencing have set the stage for novel investigations of genome evolution using new bioinformatic and methodological tools in a phylogenetic framework...
2017: PloS One
https://www.readbyqxmd.com/read/28225771/the-phylodynamics-of-the-rabies-virus-in-the-russian-federation
#3
Andrei A Deviatkin, Alexander N Lukashev, Elena M Poleshchuk, Vladimir G Dedkov, Sergey E Tkachev, Gennadiy N Sidorov, Galina G Karganova, Irina V Galkina, Mikhail Yu Shchelkanov, German A Shipulin
Near complete rabies virus N gene sequences (1,110 nt) were determined for 82 isolates obtained from different regions of Russia between 2008 and 2016. These sequences were analyzed together with 108 representative GenBank sequences from 1977-2016 using the Bayesian coalescent approach. The timing of the major evolutionary events was estimated. Most of the isolates represented the steppe rabies virus group C, which was found over a vast geographic region from Central Russia to Mongolia and split into three groups (C0-C2) with discrete geographic prevalence...
2017: PloS One
https://www.readbyqxmd.com/read/28225562/the-adipokinetic-hormone-of-mantodea-in-comparison-to-other-dictyoptera
#4
Gerd Gäde, Heather G Marco
Six species of the order Mantodea (praying mantises) are investigated for the presence and sequence of putative adipokinetic hormones (AKHs). The selected species span a wide evolutionary range of various families and subfamilies of the clade Mantodea. The corpora cardiaca of the different species are dissected, methanolic extracts prepared, peptides separated by liquid chromatography, and AKHs detected and sequenced by ion trap mass spectrometry. All six species investigated contain an octapeptide with the primary structure pGlu-Val-Asn-Phe-Thr-Pro-Asn-Trp amide, which is code-named Emppe-AKH and had been found earlier in three other species of Mantodea...
February 22, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28224712/a-novel-astrovirus-associated-with-encephalitis-and-ganglionitis-in-domestic-sheep
#5
F Pfaff, K Schlottau, S Scholes, A Courtenay, B Hoffmann, D Höper, M Beer
In June 2013, a 4-year-old Welsh Mountain ewe and in March 2014 a 10-day-old lamb of the same breed and the same flock presented progressive neurological signs including depressed sensorium, tremor, and unusual behaviour. Neuropathological examination of the brain and spinal cord detected non-suppurative polioencephalomyelitis and dorsal root ganglionitis, characteristic of a neurotropic viral agent in both sheep. Metagenomic analysis of different tissue samples from both animals identified a novel Ovine Astrovirus (OvAstV)...
February 22, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28224251/complete-genome-sequence-of-sunflower-ring-blotch-virus-a-new-potyvirus-infecting-sunflower-in-argentina
#6
Dariel Cabrera Mederos, Nicolás Bejerman, Verónica Trucco, Soledad de Breuil, Sergio Lenardon, Fabián Giolitti
The complete genome sequence of sunflower ring blotch virus (SuRBV), a previously undescribed potyvirus infecting sunflower in Argentina, is reported. The SuRBV genome comprises 9555 nucleotides (nt) and encodes a polyprotein of 3061 amino acids, flanked by 5' and 3' untranslated regions of 117 and 255 nt, respectively. Phylogenetic analysis showed that SuRBV belongs to the potato virus Y (PVY) subgroup and clusters together with sunflower chlorotic mottle virus and bidens mosaic virus. Percentage nucleotide identity between the whole genomes of SuRBV and BiMV was 70...
February 21, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28224116/persistence-of-functional-protein-domains-in-mycoplasma-species-and-their-role-in-host-specificity-and-synthetic-minimal-life
#7
Tjerko Kamminga, Jasper J Koehorst, Paul Vermeij, Simen-Jan Slagman, Vitor A P Martins Dos Santos, Jetta J E Bijlsma, Peter J Schaap
Mycoplasmas are the smallest self-replicating organisms and obligate parasites of a specific vertebrate host. An in-depth analysis of the functional capabilities of mycoplasma species is fundamental to understand how some of simplest forms of life on Earth succeeded in subverting complex hosts with highly sophisticated immune systems. In this study we present a genome-scale comparison, focused on identification of functional protein domains, of 80 publically available mycoplasma genomes which were consistently re-annotated using a standardized annotation pipeline embedded in a semantic framework to keep track of the data provenance...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28224003/darwinism-for-the-genomic-age-connecting-mutation-to-diversification
#8
Xia Hua, Lindell Bromham
A growing body of evidence suggests that rates of diversification of biological lineages are correlated with differences in genome-wide mutation rate. Given that most research into differential patterns of diversification rate have focused on species traits or ecological parameters, a connection to the biochemical processes of genome change is an unexpected observation. While the empirical evidence for a significant association between mutation rate and diversification rate is mounting, there has been less effort in explaining the factors that mediate this connection between genetic change and species richness...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28223993/diacylglycerol-kinases-are-widespread-in-higher-plants-and-display-inducible-gene-expression-in-response-to-beneficial-elements-metal-and-metalloid-ions
#9
Hugo F Escobar-Sepúlveda, Libia I Trejo-Téllez, Paulino Pérez-Rodríguez, Juan V Hidalgo-Contreras, Fernando C Gómez-Merino
Diacylglycerol kinases (DGKs) are pivotal signaling enzymes that phosphorylate diacylglycerol (DAG) to yield phosphatidic acid (PA). The biosynthesis of PA from phospholipase D (PLD) and the coupled phospholipase C (PLC)/DGK route is a crucial signaling process in eukaryotic cells. Next to PLD, the PLC/DGK pathway is the second most important generator of PA in response to biotic and abiotic stresses. In eukaryotic cells, DGK, DAG, and PA are implicated in vital processes such as growth, development, and responses to environmental cues...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28223991/the-comparison-of-expressed-candidate-secreted-proteins-from-two-arbuscular-mycorrhizal-fungi-unravels-common-and-specific-molecular-tools-to-invade-different-host-plants
#10
Laurent Kamel, Nianwu Tang, Mathilde Malbreil, Hélène San Clemente, Morgane Le Marquer, Christophe Roux, Nicolas Frei Dit Frey
Arbuscular mycorrhizal fungi (AMF), belonging to the fungal phylum Glomeromycota, form mutualistic symbioses with roots of almost 80% of land plants. The release of genomic data from the ubiquitous AMF Rhizophagus irregularis revealed that this species possesses a large set of putative secreted proteins (RiSPs) that could be of major importance for establishing the symbiosis. In the present study, we aimed to identify SPs involved in the establishment of AM symbiosis based on comparative gene expression analyses...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28223924/insect-like-organization-of-the-stomatopod-central-complex-functional-and-phylogenetic-implications
#11
Hanne H Thoen, Justin Marshall, Gabriella H Wolff, Nicholas J Strausfeld
One approach to investigating functional attributes of the central complex is to relate its various elaborations to pancrustacean phylogeny, to taxon-specific behavioral repertoires and ecological settings. Here we review morphological similarities between the central complex of stomatopod crustaceans and the central complex of dicondylic insects. We discuss whether their central complexes possess comparable functional properties, despite the phyletic distance separating these taxa, with mantis shrimp (Stomatopoda) belonging to the basal branch of Eumalacostraca...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28223917/gene-expression-profiling-in-the-injured-spinal-cord-of-trachemys-scripta-elegans-an-amniote-with-self-repair-capabilities
#12
Adrián Valentin-Kahan, Gabriela B García-Tejedor, Carlos Robello, Omar Trujillo-Cenóz, Raúl E Russo, Fernando Alvarez-Valin
Slider turtles are the only known amniotes with self-repair mechanisms of the spinal cord that lead to substantial functional recovery. Their strategic phylogenetic position makes them a relevant model to investigate the peculiar genetic programs that allow anatomical reconnection in some vertebrate groups but are absent in others. Here, we analyze the gene expression profile of the response to spinal cord injury (SCI) in the turtle Trachemys scripta elegans. We found that this response comprises more than 1000 genes affecting diverse functions: reaction to ischemic insult, extracellular matrix re-organization, cell proliferation and death, immune response, and inflammation...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28223683/metataxonomics-reveal-vultures-as-a-reservoir-for-clostridium-perfringens
#13
Xiangli Meng, Shan Lu, Jing Yang, Dong Jin, Xiaohong Wang, Xiangning Bai, Yumeng Wen, Yiting Wang, Lina Niu, Changyun Ye, Ramon Rosselló-Móra, Jianguo Xu
The Old World vulture may carry and spread pathogens for emerging infections since they feed on the carcasses of dead animals and participate in the sky burials of humans, some of whom have died from communicable diseases. Therefore, we studied the precise fecal microbiome of the Old World vulture with metataxonomics, integrating the high-throughput sequencing of almost full-length small subunit ribosomal RNA (16S rRNA) gene amplicons in tandem with the operational phylogenetic unit (OPU) analysis strategy...
February 22, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28223460/mechanism-of-h2s-oxidation-by-the-dissimilatory-perchlorate-reducing-microorganism-azospira-suillum-ps
#14
Misha G Mehta-Kolte, Dana Loutey, Ouwei Wang, Matthew D Youngblut, Christopher G Hubbard, Kelly M Wetmore, Mark E Conrad, John D Coates
The genetic and biochemical basis of perchlorate-dependent H2S oxidation (PSOX) was investigated in the dissimilatory perchlorate-reducing microorganism (DPRM) Azospira suillum PS (PS). Previously, it was shown that all known DPRMs innately oxidize H2S, producing elemental sulfur (S(o)). Although the process involving PSOX is thermodynamically favorable (ΔG°' = -206 kJ ⋅ mol(-1) H2S), the underlying biochemical and genetic mechanisms are currently unknown. Interestingly, H2S is preferentially utilized over physiological electron donors such as lactate or acetate although no growth benefit is obtained from the metabolism...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28223459/evolution-and-epidemiology-of-multidrug-resistant-klebsiella-pneumoniae-in-the-united-kingdom-and-ireland
#15
Danesh Moradigaravand, Veronique Martin, Sharon J Peacock, Julian Parkhill
Klebsiella pneumoniae is a human commensal and opportunistic pathogen that has become a leading causative agent of hospital-based infections over the past few decades. The emergence and global expansion of hypervirulent and multidrug-resistant (MDR) clones of K. pneumoniae have been increasingly reported in community-acquired and nosocomial infections. Despite this, the population genomics and epidemiology of MDR K. pneumoniae at the national level are still poorly understood. To obtain insights into these, we analyzed a systematic large-scale collection of invasive MDR K...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28223456/a-natural-chimeric-pseudomonas-bacteriocin-with-novel-pore-forming-activity-parasitizes-the-ferrichrome-transporter
#16
Maarten G K Ghequire, Lieselore Kemland, Ernesto Anoz-Carbonell, Susan K Buchanan, René De Mot
Modular bacteriocins represent a major group of secreted protein toxins with a narrow spectrum of activity, involved in interference competition between Gram-negative bacteria. These antibacterial proteins include a domain for binding to the target cell and a toxin module at the carboxy terminus. Self-inhibition of producers is provided by coexpression of linked immunity genes that transiently inhibit the toxin's activity through formation of bacteriocin-immunity complexes or by insertion in the inner membrane, depending on the type of toxin module...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28223255/olegusella-massiliensis-gen-nov-sp-nov-strain-khd7-t-a-new-bacterial-genus-isolated-from-the-female-genital-tract-of-a-patient-with-bacterial-vaginosis
#17
Khoudia Diop, Awa Diop, Florence Bretelle, Frédéric Cadoret, Caroline Michelle, Magali Richez, Jean-François Cocallemen, Didier Raoult, Pierre-Edouard Fournier, Florence Fenollar
Strain KHD7(T), a Gram-stain-positive rod-shaped, non-sporulating, strictly anaerobic bacterium, was isolated from the vaginal swab of a woman with bacterial vaginosis. We studied its phenotypic characteristics and sequenced its complete genome. The major fatty acids were C16:0 (44%), C18:2n6 (22%), and C18:1n9 (14%). The 1,806,744 bp long genome exhibited 49.24% G+C content; 1549 protein-coding and 51 RNA genes. Strain KHD7(T) exhibited a 93.5% 16S rRNA similarity with Olsenella uli, the phylogenetically closest species in the family Coriobacteriaceae...
February 18, 2017: Anaerobe
https://www.readbyqxmd.com/read/28223252/the-origin-and-evolution-of-basigin-bsg-gene-a-comparative-genomic-and-phylogenetic-analysis
#18
Xinyan Zhu, Shenglan Wang, Mingjie Shao, Jie Yan, Fei Liu
Basigin (BSG), also known as extracellular matrix metalloproteinase inducer (EMMPRIN) or cluster of differentiation 147 (CD147), plays various fundamental roles in the intercellular recognition involved in immunologic phenomena, differentiation, and development. In this study, we aimed to compare the similarities and differences of BSG among organisms and explore possible evolutionary relationships based on the comparison result. We used the extensive BLAST tool to search the metazoan genomes, N-glycosylation sites, the transmembrane region and other functional sites...
February 18, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28223161/molecular-characterization-of-pacific-oyster-crassostrea-gigas-irak4-gene-and-its-role-in-myd88-dependent-pathway
#19
Xueying Tang, Baoyu Huang, Linlin Zhang, Li Li, Guofan Zhang
Interleukin-1 receptor-associated kinases (IRAKs) play important roles in MyD88-dependent TLR signaling, the crucial innate immune pathway in molluscs. In this study, we examined the full-length IRAK4 genetic sequence in the Pacific oyster (Crassostrea gigas) by molecular cloning. Phylogenetic analysis revealed that CgIRAK4 is most closely related to Mytilus edulis, and forms a clade with other molluscs. CgIRAK4 transcripts are widely expressed in all tissues, with the highest expression observed in the hemocytes and gill...
February 13, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28223146/identification-of-a-novel-cosavirus-species-in-feces-of-children-and-its-relationship-with-acute-gastroenteritis-in-china
#20
Jie-Mei Yu, Yuan-Yun Ao, Li-Li Li, Zhao-Jun Duan
OBJECTIVES: To assess the prevalence of human cosavirus (HCosV) in China and to determine the association of a novel HCosV (Cosa-CHN) with acute gastroenteritis (AGE) . METHODS: A case-control study with 461 paired stool samples from diarrhea and healthy children was conducted. Real-time PCR and nested PCR were used to detect the HCosVs. Rapid-amplification of cDNA ends was employed to obtain the ends of the Cosa-CHN. RESULTS: Known HCosVs were detected in two control samples, while Cosa-CHN was detected in eight (1...
February 18, 2017: Clinical Microbiology and Infection
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