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https://www.readbyqxmd.com/read/28280009/complete-genome-sequence-of-spiroplasma-sp-nbrc-100390
#1
Mindia Haryono, Wen-Sui Lo, Gail E Gasparich, Chih-Horng Kuo
Spiroplasma sp. NBRC 100390 was initially described as a duplicate of S. atrichopogonis GNAT3597(T) (=ATCC BAA-520(T)) but later found to be different in the 16S rDNA sequences. Here, we report the complete genome sequence of this bacterium to establish its identity and to facilitate future investigation.
March 9, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28217108/chemotaxis-without-conventional-two-component-system-based-on-cell-polarity-and-aerobic-conditions-in-helicity-switching-swimming-of-spiroplasma-eriocheiris
#2
Peng Liu, Huajun Zheng, Qingguo Meng, Natsuho Terahara, Wei Gu, Shengyue Wang, Guoping Zhao, Daisuke Nakane, Wen Wang, Makoto Miyata
Spiroplasma eriocheiris is a pathogen that causes mass mortality in Chinese mitten crab, Eriocheir sinensis. S. eriocheiris causes tremor disease and infects almost all of the artificial breeding crustaceans, resulting in disastrous effects on the aquaculture economy in China. S. eriocheiris is a wall-less helical bacterium, measuring 2.0 to 10.0 μm long, and can swim up to 5 μm per second in a viscous medium without flagella by switching the cell helicity at a kink traveling from the front to the tail. In this study, we showed that S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28184355/spiroplasma-eriocheiris-adhesin-like-protein-alp-interacts-with-epidermal-growth-factor-egf-domain-proteins-to-facilitate-infection
#3
Libo Hou, Yuhan Liu, Qi Gao, Xuechuan Xu, Mingxiao Ning, Jingxiu Bi, Hui Liu, Min Liu, Wei Gu, Wen Wang, Qingguo Meng
Spiroplasma eriocheiris is a novel pathogen found in recent years, causing the tremor disease (TD) of Chinese mitten crab Eriocheir sinensis. Like Spiroplasma mirum, S. eriocheiris infects the newborn mouse (adult mice are not infected) and can cause cataract. Adhesion-related protein is an important protein involved in the interaction between pathogen and host. In this study, the Adhesin-like Protein (ALP) of S. eriocheiris was detected on its outer membrane by using immune electron microscopy, and was found to be involved in the bacterium's infection of mouse embryo fibroblasts (3T6-Swiss albino)...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28115382/development-of-oric-based-plasmids-for-mesoplasma-florum
#4
Dominick Matteau, Marie-Eve Pepin, Vincent Baby, Samuel Gauthier, Mélissa Arango Giraldo, Thomas F Knight, Sébastien Rodrigue
The near-minimal bacterium Mesoplasma florum constitutes an attractive model for systems biology and for the development of a simplified cell chassis in synthetic biology. However, the lack of genetic engineering tools for this microorganism has limited our capacity to understand its basic biology and modify its genome. To address this issue, we have evaluated the susceptibility of M. florum to common antibiotics, and developed the first generation of artificial plasmids able to replicate in this bacterium...
January 23, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28059790/combined-creutzfeldt-jakob-jacob-alzheimer-s-disease-cases-are-important-in-search-for-microbes-in-alzheimer-s-disease
#5
Frank O Bastian
The question whether Alzheimer's disease is infectious as brought up in the recent editorial published in the Journal of Alzheimer's Disease is complicated by the controversy whether the causal agent is a microbe or a misfolded host protein (amyloid). The replicating amyloid (prion) theory, based upon data from studies of Creutzfeldt-Jakob disease (CJD) and other transmissible spongiform encephalopathies (TSEs), has been challenged since the prion can be separated from TSE infectivity, and spiroplasma, a wall-less bacterium, has been shown to be involved in the pathogenesis of CJD...
December 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27999573/reconstruction-of-transcription-control-networks-in-mollicutes-by-high-throughput-identification-of-promoters
#6
Gleb Y Fisunov, Irina A Garanina, Daria V Evsyutina, Tatiana A Semashko, Anastasia S Nikitina, Vadim M Govorun
Bacteria of the class Mollicutes have significantly reduced genomes and gene expression control systems. They are also efficient pathogens that can colonize a broad range of hosts including plants and animals. Despite their simplicity, Mollicutes demonstrate complex transcriptional responses to various conditions, which contradicts their reduction in gene expression regulation mechanisms. We analyzed the conservation and distribution of transcription regulators across the 50 Mollicutes species. The majority of the transcription factors regulate transport and metabolism, and there are four transcription factors that demonstrate significant conservation across the analyzed bacteria...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27997761/the-enemy-within-phloem-limited-pathogens
#7
REVIEW
Claire Bendix, Jennifer D Lewis
The growing impact of phloem-limited pathogens on high value crops has renewed interest in understanding how they cause disease. Although these pathogens cause substantial crop losses, many are poorly characterized. In this review, we present examples of phloem-limited pathogens that include intracellular bacteria with and without cell walls, and viruses. Phloem-limited pathogens have small genomes and lack many genes required for core metabolic processes, which is in part an adaptation to the unique phloem environment...
December 20, 2016: Molecular Plant Pathology
https://www.readbyqxmd.com/read/27995305/stubborn-disease-in-iran-diversity-of-spiroplasma-citri-strains-in-circulifer-haematoceps-leafhoppers-collected-in-sesame-fields-in-fars-province
#8
Zahra Zarei, Mohammad Salehi, Zabihallah Azami, Khadijeh Salari, Laure Béven
Spiroplasma citri is a bacterial pathogen responsible for the economically important citrus stubborn disease. Sesame and citrus seeds serve as hosts for both S. citri and its leafhopper vector Circulifer haematoceps. To evaluate whether sesame could act as a reservoir for citrus-infecting strains or not, the genetic diversity among S. citri strains found in leafhoppers collected in citrus and citrus-free sesame fields was investigated. Among 26 periwinkle plants exposed to the collected C. haematoceps leafhoppers, 12 plants developed typical stubborn symptoms...
February 2017: Current Microbiology
https://www.readbyqxmd.com/read/27926815/identification-of-lysophospholipase-protein-from-spiroplasma-eriocheiris-and-verification-of-its-function
#9
Huanxi Zhu, Peng Liu, Jie Du, Jian Wang, Yunting Jing, Jia Zhang, Wei Gu, Wen Wang, Qingguo Meng
Spiroplasma eriocheiris is known to cause the tremor disease in the Chinese mitten crab Eriocheir sinensis; however, the molecular characterization of this pathogen is still unclear. S. eriocheiris has the ability to invade and survive within mouse 3T6 cells. The invasion process may require causing damage to the host cell membrane by chemical, physical, or enzymatic means. In this study, we systematically characterized a novel lysophospholipase (lysoPL) of S. eriocheiris TDA-040725-5T. The gene that encodes lysoPL in S...
December 7, 2016: Microbiology
https://www.readbyqxmd.com/read/27889142/the-microbiota-of-marketed-processed-edible-insects-as-revealed-by-high-throughput-sequencing
#10
Cristiana Garofalo, Andrea Osimani, Vesna Milanović, Manuela Taccari, Federica Cardinali, Lucia Aquilanti, Paola Riolo, Sara Ruschioni, Nunzio Isidoro, Francesca Clementi
Entomophagy has been linked to nutritional, economic, social and ecological benefits. However, scientific studies on the potential safety risks in eating edible insects need to be carried out for legislators, markets and consumers. In this context, the microbiota of edible insects deserves to be deeply investigated. The aim of this study was to elucidate the microbial species occurring in some processed marketed edible insects, namely powdered small crickets, whole dried small crickets (Acheta domesticus), whole dried locusts (Locusta migratoria), and whole dried mealworm larvae (Tenebrio molitor), through culture-dependent (classical microbiological analyses) and -independent methods (pyrosequencing)...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27875577/heat-stress-affects-facultative-symbiont-mediated-protection-from-a-parasitoid-wasp
#11
Eleanor R Heyworth, Julia Ferrari
Many insects carry facultative bacterial symbionts, which provide benefits including resistance to natural enemies and abiotic stresses. Little is known about how these beneficial phenotypes are affected when biotic or abiotic threats occur simultaneously. The pea aphid (Acyrthosiphon pisum) can host several well-characterized symbiont species. The symbiont known as X-type can protect against both parasitoid wasps and heat stress. Here, we used three pea aphid genotypes that were naturally infected with X-type and the symbiont Spiroplasma sp...
2016: PloS One
https://www.readbyqxmd.com/read/27808161/structural-basis-of-the-high-thermal-stability-of-the-histone-like-hu-protein-from-the-mollicute-spiroplasma-melliferum-kc3
#12
Konstantin M Boyko, Tatiana V Rakitina, Dmitry A Korzhenevskiy, Anna V Vlaskina, Yuliya K Agapova, Dmitry E Kamashev, Sergey Y Kleymenov, Vladimir O Popov
The three-dimensional structure of the histone-like HU protein from the mycoplasma Spiroplasma melliferum KC3 (HUSpm) was determined at 1.4 Å resolution, and the thermal stability of the protein was evaluated by differential scanning calorimetry. A detailed analysis revealed that the three-dimensional structure of the HUSpm dimer is similar to that of its bacterial homologues but is characterized by stronger hydrophobic interactions at the dimer interface. This HUSpm dimer interface lacks salt bridges but is stabilized by a larger number of hydrogen bonds...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27795290/complete-genome-sequence-of-spiroplasma-helicoides-tabs-2t-dsm-22551-a-bacterium-isolated-from-a-horsefly-tabanus-abactor
#13
Wei-Yi Shen, Wen-Sui Lo, Yi-Ching Lai, Chih-Horng Kuo
Spiroplasma helicoides TABS-2(T) (DSM 22551) was isolated from the gut of a horsefly (Tabanus abactor) collected near Ardmore, Oklahoma, USA, in 1987. Here, we report the complete genome sequence of this bacterium to facilitate the investigation of its biology and the comparative genomics among Spiroplasma species.
October 20, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27760404/an-improved-non-denaturing-method-for-the-purification-of-spiralin-the-main-membrane-lipoprotein-of-the-pathogenic-bacteria-spiroplasma-melliferum
#14
Yann Desfougères, Jean-Michel Poitou, Henri Wróblewski, Laure Béven
Spiralin is the most abundant protein of several species of spiroplasmas, helical, motile bacteria pathogenic for arthropods and plants. This amphiphilic protein is anchored to the outer face of the plasma membrane by a lipoylated N-terminal cysteine. Although spiroplasma pathogenicity in mammals is controversial, it was shown that spiralin is highly immunogenic and endowed with immunomodulatory activity. In this paper, we describe a high performance method for the purification of Spiroplasma melliferum spiralin under non-denaturing conditions...
November 15, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/27660788/complete-genome-sequence-of-spiroplasma-turonicum-tab4ct-a-bacterium-isolated-from-horse-flies-haematopota-sp
#15
Wen-Sui Lo, Gail E Gasparich, Chih-Horng Kuo
Spiroplasma turonicum Tab4c(T) was isolated from a horse fly (Haematopota sp.; probably Haematopota pluvialis) collected at Champchevrier, Indre-et-Loire, Touraine, France, in 1991. Here, we report the complete genome sequence of this bacterium to facilitate the investigation of its biology and the comparative genomics among Spiroplasma spp.
2016: Genome Announcements
https://www.readbyqxmd.com/read/27650264/male-killing-symbiont-damages-host-s-dosage-compensated-sex-chromosome-to-induce-embryonic-apoptosis
#16
Toshiyuki Harumoto, Hisashi Anbutsu, Bruno Lemaitre, Takema Fukatsu
Some symbiotic bacteria are capable of interfering with host reproduction in selfish ways. How such bacteria can manipulate host's sex-related mechanisms is of fundamental interest encompassing cell, developmental and evolutionary biology. Here, we uncover the molecular and cellular mechanisms underlying Spiroplasma-induced embryonic male lethality in Drosophila melanogaster. Transcriptomic analysis reveals that many genes related to DNA damage and apoptosis are up-regulated specifically in infected male embryos...
September 21, 2016: Nature Communications
https://www.readbyqxmd.com/read/27602526/bacterial-associates-of-hyalesthes-obsoletus-hemiptera-cixiidae-the-insect-vector-of-bois-noir-disease-with-a-focus-on-cultivable-bacteria
#17
Lilach Iasur-Kruh, Vered Naor, Tirtza Zahavi, Matthew J Ballinger, Rakefet Sharon, Wyatt E Robinson, Steve J Perlman, Einat Zchori-Fein
The planthopper Hyalesthes obsoletus (Hemiptera: Cixiidae) is an important vector of phytoplasma diseases in grapevine. In the current study, the bacterial community compositions of symbionts of this insect were examined. Two dominant bacterial lineages were identified by mass sequencing: the obligate symbiont Candidatus Sulcia, and a facultative symbiont that is closely related to Pectobacterium sp. and to BEV, a cultivable symbiont of another phytoplasma vector, the leafhopper Euscelidius variegatus. In addition, one bacterium was successfully isolated in this study - a member of the family Xanthomonadaceae that is most closely related to the genus Dyella...
January 2017: Research in Microbiology
https://www.readbyqxmd.com/read/27555855/vector-borne-bacterial-plant-pathogens-interactions-with-hemipteran-insects-and-plants
#18
REVIEW
Laura M Perilla-Henao, Clare L Casteel
Hemipteran insects are devastating pests of crops due to their wide host range, rapid reproduction, and ability to transmit numerous plant-infecting pathogens as vectors. While the field of plant-virus-vector interactions has flourished in recent years, plant-bacteria-vector interactions remain poorly understood. Leafhoppers and psyllids are by far the most important vectors of bacterial pathogens, yet there are still significant gaps in our understanding of their feeding behavior, salivary secretions, and plant responses as compared to important viral vectors, such as whiteflies and aphids...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27519426/winding-paths-to-simplicity-genome-evolution-in-facultative-insect-symbionts
#19
REVIEW
Wen-Sui Lo, Ya-Yi Huang, Chih-Horng Kuo
Symbiosis between organisms is an important driving force in evolution. Among the diverse relationships described, extensive progress has been made in insect-bacteria symbiosis, which improved our understanding of the genome evolution in host-associated bacteria. Particularly, investigations on several obligate mutualists have pushed the limits of what we know about the minimal genomes for sustaining cellular life. To bridge the gap between those obligate symbionts with extremely reduced genomes and their non-host-restricted ancestors, this review focuses on the recent progress in genome characterization of facultative insect symbionts...
August 12, 2016: FEMS Microbiology Reviews
https://www.readbyqxmd.com/read/27498276/systematic-analysis-of-the-lysine-acetylome-of-the-pathogenic-bacterium-spiroplasma-eriocheiris-reveals-acetylated-proteins-related-to-metabolism-and-helical-structure
#20
Qingguo Meng, Peng Liu, Jian Wang, Yinghui Wang, Libo Hou, Wei Gu, Wen Wang
UNLABELLED: Post-translational modifications such as acetylation are an essential regulatory mechanism of protein function. Spiroplasma eriocheiris, with no cell wall and a helical structure, is a novel pathogen of freshwater crustacean. There is no other evidence of acylation (such as succinylation and propionylation) except acetylation genes in S. eriocheiris concise genome. So the acetylation may play an important role in S. eriocheiris. Here, we conducted the first lysine acetylome in S...
October 4, 2016: Journal of Proteomics
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