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https://www.readbyqxmd.com/read/29691370/a-new-subtype-of-eastern-tick-borne-encephalitis-virus-discovered-in-qinghai-tibet-plateau-china
#1
Xiaoyi Dai, Guobao Shang, Shan Lu, Jing Yang, Jianguo Xu
Tick-borne encephalitis virus (TBEV) has been classified into three subtypes, namely the European (Eu-TBEV), Far Eastern (FE-TBEV), and Siberian (Sib-TBEV). In this study, we discovered a new subtype of TBEV in wild rodent Marmota himalayana in Qinghai-Tibet Plateau in China, proposed as subtype Himalayan (Him-TBEV). Two complete genomes of TBEV were obtained from respiratory samples of 200 marmots. The phylogenetic analysis using the E protein and polyprotein demonstrated that the two strains of Him-TBEV formed an independent branch, separated from Eu-TBEV, Sib-TBEV, and FE-TBEV...
April 25, 2018: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29688474/increase-in-processing-factors-is-involved-in-skewed-microrna-expression-in-patients-with-ulcerative-colitis-who-develop-small-intestine-inflammation-after-pouch-surgery
#2
Hadas Sherman Horev, Keren M Rabinowitz, Hofit Elad, Revital Barkan, Shay Ben-Shachar, Metsada Pasmanik Chor, Iris Dotan
Background: A large-scale increase in microRNA (miRNA) expression was observed in patients with ulcerative colitis who underwent pouch surgery and developed inflammation of the pouch (pouchitis). In this study, we assessed miRNA expression in these patients and investigated how regulation of its expression changes in the setting of pouchitis. Methods: Autologous samples that included mucosal biopsies, peripheral blood cells, and plasma were collected from the patients...
April 23, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29684597/comparative-chloroplast-genomics-between-the-invasive-weed-mikania-micrantha-and-its-indigenous-congener-mikania-cordata-structure-variation-identification-of-highly-divergent-regions-divergence-time-estimation-and-phylogenetic-analysis
#3
Yingjuan Su, Lu Huang, Zhen Wang, Ting Wang
Mikania micrantha and Mikania cordata are the only two species in genus Mikania (Asteraceae) in China. They share very similar morphological and life-history characteristics but occupy quite different habitats. Most importantly, they generate totally different ecological consequences. While M. micrantha has become an exotic invasive weed, M. cordata exists as an indigenous species with no harmful effects on native plants or habitats. As a continuous study of our previously reported M. micrantha chloroplast (cp) genome, in this study we have further sequenced the M...
April 20, 2018: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/29684214/new-perspectives-on-chloroplast-protein-import
#4
Masato Nakai
Virtually all chloroplasts in extant photosynthetic eukaryotes derive from a single endosymbiotic event that likely occurred more than a billion years ago between a host eukaryotic cell and a cyanobacterium-like ancestor. Many endosymbiont genes were subsequently transferred to the host nuclear genome, concomitant with the establishment of a system for protein transport through the chloroplast double-membrane envelope. Presently, 2000-3000 different nucleus-encoded chloroplast proteins must be imported into the chloroplast following their synthesis in the cytosol...
April 19, 2018: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29680234/rational-design-of-liquid-formulations-of-proteins
#5
Mark C Manning, Jun Liu, Tiansheng Li, Ryan E Holcomb
Twenty years ago, a number of eminent pharmaceutical scientists collaborated on an article describing a rational approach to developing stable lyophilized protein formulations (Carpenter, Pikal, Chang, & Randolph, 1997). Since that time, no corresponding document for rational development of liquid formulations of proteins has appeared. Certainly, many of the principles underpinning rational protein formulation have been known for some time, but no overarching scheme has ever been described in the literature...
2018: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/29680123/twenty-five-years-of-investigating-the-universal-stress-protein-function-structure-and-applications
#6
Amy C Vollmer, Steven J Bark
Since the initial discovery of universal stress protein A (UspA) 25 years ago, remarkable advances in molecular and biochemical technologies have revolutionized our understanding of biology. Many studies using these technologies have focused on characterization of the uspA gene and Usp-type proteins. These studies have identified the conservation of Usp-like proteins across bacteria, archaea, plants, and even some invertebrate animals. Regulation of these proteins under diverse stresses has been associated with different stress-response genes including spoT and relA in the stringent response and the dosR two-component signaling pathways...
2018: Advances in Applied Microbiology
https://www.readbyqxmd.com/read/29679176/a-versatile-vector-toolkit-for-functional-analysis-of-rice-genes
#7
Feng He, Fan Zhang, Wenxian Sun, Yuese Ning, Guo-Liang Wang
BACKGROUND: Rice (Oryza sativa) is the main food for half of the world's population, and is considered the model for molecular biology studies of monocotyledon species. Although the rice genome was completely sequenced about 15 years ago, the function of most rice genes is still unknown. RESULTS: In this study, we developed a vector toolkit that contains 42 vectors for transient expression studies in rice protoplasts and stable expression analysis in transgenic rice...
April 20, 2018: Rice
https://www.readbyqxmd.com/read/29678829/draft-genome-sequence-of-camellia-sinensis-var-sinensis-provides-insights-into-the-evolution-of-the-tea-genome-and-tea-quality
#8
Chaoling Wei, Hua Yang, Songbo Wang, Jian Zhao, Chun Liu, Liping Gao, Enhua Xia, Ying Lu, Yuling Tai, Guangbiao She, Jun Sun, Haisheng Cao, Wei Tong, Qiang Gao, Yeyun Li, Weiwei Deng, Xiaolan Jiang, Wenzhao Wang, Qi Chen, Shihua Zhang, Haijing Li, Junlan Wu, Ping Wang, Penghui Li, Chengying Shi, Fengya Zheng, Jianbo Jian, Bei Huang, Dai Shan, Mingming Shi, Congbing Fang, Yi Yue, Fangdong Li, Daxiang Li, Shu Wei, Bin Han, Changjun Jiang, Ye Yin, Tao Xia, Zhengzhu Zhang, Jeffrey L Bennetzen, Shancen Zhao, Xiaochun Wan
Tea, one of the world's most important beverage crops, provides numerous secondary metabolites that account for its rich taste and health benefits. Here we present a high-quality sequence of the genome of tea, Camellia sinensis var. sinensis (CSS), using both Illumina and PacBio sequencing technologies. At least 64% of the 3.1-Gb genome assembly consists of repetitive sequences, and the rest yields 33,932 high-confidence predictions of encoded proteins. Divergence between two major lineages, CSS and Camellia sinensis var...
April 20, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29677157/molecular-characterization-and-the-function-of-argonaute3-in-rnai-pathway-of-plutella-xylostella
#9
Muhammad Salman Hameed, Zhengbing Wang, Liette Vasseur, Guang Yang
Argonaute (Ago) protein family plays a key role in the RNA interference (RNAi) process in different insects including Lepidopteran. However, the role of Ago proteins in the RNAi pathway of Plutella xylostella is still unknown. We cloned an Argonaute3 gene in P. xylostella ( PxAgo3 ) with the complete coding sequence of 2832 bp. The encoded protein had 935 amino acids with an expected molecular weight of 108.9 kDa and an isoelectric point of 9.29. It contained a PAZ (PIWI/Argonaute/Zwile) domain and PIWI (P-element-induced whimpy testes) domain...
April 20, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29675961/a-path-to-the-powerhouse-systems-to-structure-approaches-for-studying-mitochondrial-proteins
#10
David J Pagliarini
The young investigator award from the Protein Society was a special honor for me because, at its essence, the goal of my laboratory is to define what obscure proteins do. Years ago, I stumbled into mitochondria as a venue for this work, and these organelles continue to define the biological theme of my laboratory. Our approaches are fairly broad, reflecting my own somewhat unorthodox training among diverse scientific fields spanning organic synthesis, chemical biology, mechanistic biochemistry, signal transduction, and systems biology...
April 20, 2018: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/29675458/bioengineered-liver-models-for-drug-testing-and-cell-differentiation-studies
#11
REVIEW
Gregory H Underhill, Salman R Khetani
In vitro models of the human liver are important for the following: (1) mitigating the risk of drug-induced liver injury to human beings, (2) modeling human liver diseases, (3) elucidating the role of single and combinatorial microenvironmental cues on liver cell function, and (4) enabling cell-based therapies in the clinic. Methods to isolate and culture primary human hepatocytes (PHHs), the gold standard for building human liver models, were developed several decades ago; however, PHHs show a precipitous decline in phenotypic functions in 2-dimensional extracellular matrix-coated conventional culture formats, which does not allow chronic treatment with drugs and other stimuli...
March 2018: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29672360/cutaneous-metastasis-of-adenocarcinoma-of-the-ampulla-of-vater
#12
Angel Fernandez-Flores, David S Cassarino
Cutaneous metastases from an adenocarcinoma of the Ampulla of Vater are very rare, with only a few cases previously reported. We present here an additional case in a 57-year-old woman who complained of a painful growth on her frontal scalp that she had noticed 4 months earlier. Her medical history included an ampullary adenocarcinoma, which was diagnosed 4 years ago, excised through a Whipple procedure, and treated using chemotherapy and radiotherapy. The scalp biopsy showed a dermal and epidermotropic well-differentiated glandular neoplasm with abundant neutrophils within the luminae of the tumoral glands...
April 17, 2018: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29669830/evolution-guided-structural-and-functional-analyses-of-the-herc-family-reveals-an-ancient-marine-origin-and-determinants-of-antiviral-activity
#13
Ermela Paparisto, Matthew W Woods, Macon D Coleman, Seyed A Moghadasi, Divjyot S Kochar, Sean K Tom, Hinissan P Kohio, Richard M Gibson, Taryn J Rohringer, Nina R Hunt, Eric J Di Gravio, Jonathan Y Zhang, Meijuan Tian, Yong Gao, Eric J Arts, Stephen D Barr
In humans, 'homologous to the E6-AP carboxyl terminus (HECT) and regulator of chromosome condensation 1 (RCC1)-like domain-containing protein 5' (HERC5) is an interferon-induced protein that inhibits replication of evolutionarily diverse viruses including human immunodeficiency virus type 1 (HIV-1). To better understand the origin, evolution and function of HERC5, we performed phylogenetic, structural and functional analyses of the entire human small HERC family, which includes HERC3, HERC4, HERC5 and HERC6...
April 18, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29667462/glucosamine-for-the-treatment-of-osteoarthritis-the-time-has-come-for-higher-dose-trials
#14
Mark F McCarty, James H O'Keefe, James J DiNicolantonio
Although clinical trials with glucosamine in osteoarthritis have yielded mixed results, leading to doubts about its efficacy, the utility of glucosamine for preventing joint destruction and inflammation is well documented in rodent models of arthritis, including models of spontaneous osteoarthritis. The benefit of oral glucosamine in adjuvant arthritis is markedly dose dependent, likely reflecting a modulation of tissue levels of UDP-N-acetylglucosamine that in turn influences mucopolysaccharide synthesis and the extent of protein O-GlcNAcylation...
April 18, 2018: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/29665433/replication-protein-a-the-laxative-that-keeps-dna-regular-the-importance-of-rpa-phosphorylation-in-maintaining-genome-stability
#15
REVIEW
Brendan M Byrne, Gregory G Oakley
The eukaryotic ssDNA-binding protein, Replication protein A (RPA), was first discovered almost three decades ago. Since then, much progress has been made to elucidate the critical roles for RPA in DNA metabolic pathways that help promote genomic stability. The canonical RPA heterotrimer (RPA1-3) is an essential coordinator of DNA metabolism that interacts with ssDNA and numerous protein partners to coordinate its roles in DNA replication, repair, recombination and telomere maintenance. An alternative form of RPA, termed aRPA, is formed by a complex of RPA4 with RPA1 and RPA3...
April 14, 2018: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/29663880/the-plasma-membrane-calcium-atpases-in-calcium-signaling-network
#16
Xiaomo Wu, Liqiang Weng, Jinyan Zhang, Xiaolong Liu, Jianqing Huang
The plasma membrane Ca2+ ATPases (PMCAs) are responsible for the clearance of Ca2+ out of cells after intracellular Ca2+ transients. Cooperating with Na+/Ca2+ exchangers (NCXs) and Ca2+ buffering proteins, PMCAs play an essential role in maintaining the long-term cellular Ca2+ homeostasis. The plasma membrane Ca2+ ATPase was first discovered in red blood cell membrane about 50 years ago, and then other PMCA isoforms and alternatively spliced variants had been identified from different tissues and different developmental stages, revealing a surprising complexity of the PMCA family...
April 16, 2018: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/29663734/new-biological-research-and-understanding-of-papanicolaou-s-test
#17
REVIEW
Elizabeth R Smith, Sophia H George, Erin Kobetz, Xiang-Xi Xu
The development of the Papanicolaou smear test by Dr. George Nicholas Papanicolaou (1883-1962) is one of the most significant achievements in screening for disease and cancer prevention in history. The Papanicolaou smear has been used for screening of cervical cancer since the 1950s. The test is technically straightforward and practical and based on a simple scientific observation: malignant cells have an aberrant nuclear morphology that can be distinguished from benign cells. Here, we review the scientific understanding that has been achieved and continues to be made on the causes and consequences of abnormal nuclear morphology, the basis of Dr...
April 16, 2018: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/29659900/monitoring-of-the-cowpea-bruchid-callosobruchus-maculatus-coleoptera-bruchidae-feeding-activity-in-cowpea-seeds-advances-in-sensing-technologies-reveals-new-insights
#18
James A Bittner, Susan Balfe, Barry R Pittendrigh, John S Popovics
Cowpea provides a significant source of protein for over 200 million people in Sub-Saharan Africa. The cowpea bruchid, Callosobruchus maculatus (F) (Coleoptera: Bruchidae), is a major pest of cowpea as the larval stage attacks stored cowpea grains, causing postharvest loss. Cowpea bruchid larvae spend all their time feeding within the cowpea seed. Past research findings, published over 25 yr ago, have shown that feeding activity of several bruchids within a cowpea seed emit mechanical vibrations within the frequency range 5-75 kHz...
April 12, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29659530/genome-sequence-of-the-freshwater-yangtze-finless-porpoise
#19
Yuan Yuan, Peijun Zhang, Kun Wang, Mingzhong Liu, Jing Li, Jingsong Zheng, Ding Wang, Wenjie Xu, Mingli Lin, Lijun Dong, Chenglong Zhu, Qiang Qiu, Songhai Li
The Yangtze finless porpoise ( Neophocaena asiaeorientalis ssp. asiaeorientalis ) is a subspecies of the narrow-ridged finless porpoise ( N. asiaeorientalis ). In total, 714.28 gigabases (Gb) of raw reads were generated by whole-genome sequencing of the Yangtze finless porpoise, using an Illumina HiSeq 2000 platform. After filtering the low-quality and duplicated reads, we assembled a draft genome of 2.22 Gb, with contig N50 and scaffold N50 values of 46.69 kilobases (kb) and 1.71 megabases (Mb), respectively...
April 16, 2018: Genes
https://www.readbyqxmd.com/read/29650230/production-of-spliced-peptides-by-the-proteasome
#20
Nathalie Vigneron, Vincent Stroobant, Violette Ferrari, Joanna Abi Habib, Benoit J Van den Eynde
CD8+ cytolytic T lymphocytes are essential players of anti-tumor immune responses. On tumors, they recognize peptides of about 8-to-10 amino acids that generally result from the degradation of cellular proteins by the proteasome. Until a decade ago, these peptides were thought to solely correspond to linear fragments of proteins that were liberated after the hydrolysis of the peptide bonds located at their extremities. However, several examples of peptides containing two fragments originally distant in the protein sequence challenged this concept and demonstrated that proteasome could also splice peptides together by creating a new peptide bond between two distant fragments...
April 9, 2018: Molecular Immunology
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