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https://www.readbyqxmd.com/read/29300153/bifidobacterium-catulorum-sp-nov-a-novel-taxon-from-the-faeces-of-the-baby-common-marmoset-callithrix-jacchus
#1
Monica Modesto, Samanta Michelini, Kaihei Oki, Bruno Biavati, Koichi Watanabe, Paola Mattarelli
In our previous study based on hsp60 PCR-restriction fragment length polymorphism and 16S rRNA gene sequencing, we stated that the bifidobacterial strains isolated from the individual faecal samples of five baby common marmosets constituted different phylogenetically isolated groups of the genus Bifidobacterium. In that study, we also proposed that these isolated groups potentially represented novel species of the genus Bifidobacterium. Out of them, Bifidobacterium aesculapii, Bifidobacterium myosotis, Bifidobacterium tissieri and Bifidobacterium hapali, have been described recently...
January 4, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29298896/mechanistic-insights-into-acephalic-spermatozoa-syndrome-associated-mutations-in-the-human-sun5-gene
#2
Yongliang Shang, Jie Yan, Wenhao Tang, Chao Liu, Sai Xiao, Yueshuai Guo, Li Yuan, Liang Chen, Hui Jiang, Xuejiang Guo, Jie Qiao, Wei Li
Acephalic spermatozoa syndrome has been reported for many decades; it is characterized by very few intact spermatozoa and tailless sperm heads in the semen and causes severe male infertility. The only gene whose mutations have been found to be associated with this syndrome encodes Sad1 and UNC84 domain-containing 5 (SUN5), a testis-specific nuclear envelope protein. The functional role of SUN5 has been well studied in mouse models, but the molecular basis for the pathogenic effects of mutations in the human SUN5 gene remain elusive...
January 3, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29290615/molecular-mechanism-of-j-domain-triggered-atp-hydrolysis-by-hsp70-chaperones
#3
Roman Kityk, Jürgen Kopp, Matthias P Mayer
Efficient targeting of Hsp70 chaperones to substrate proteins depends on J-domain cochaperones, which in synergism with substrates trigger ATP hydrolysis in Hsp70s and concomitant substrate trapping. We present the crystal structure of the J-domain of Escherichia coli DnaJ in complex with the E. coli Hsp70 DnaK. The J-domain interacts not only with DnaK's nucleotide-binding domain (NBD) but also with its substrate-binding domain (SBD) and packs against the highly conserved interdomain linker. Mutational replacement of contacts between J-domain and SBD strongly reduces the ability of substrates to stimulate ATP hydrolysis in the presence of DnaJ and compromises viability at heat shock temperatures...
December 27, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29273565/identification-of-d-amino-acid-oxidase-and-propiverine-interaction-partners-and-their-potential-role-in-the-propiverine-mediated-nephropathy
#4
Marcia Y Maier, Lisanne Luks, Oliver Baudendistel, Valentin Wittmann, Daniel R Dietrich
Propiverine, a frequently-prescribed pharmaceutical for the treatment of symptoms associated with overactive bladder syndrome, provoked massive intranuclear and cytosolic protein inclusions in rat proximal tubule epithelium, primarily consisting of the peroxisomal targeting signal 1 (PTS1) containing protein d-amino acid oxidase (DAAO). As this type of nephropathy was also observed for other drugs, the aim was to determine whether propiverine interferes with trafficking and/or import of peroxisomal proteins...
December 19, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29260303/bah1-an-e3-ligase-from-arabidopsis-thaliana-stabilizes-heat-shock-factor-%C3%AF-32-of-escherichia-coli-by-interacting-with-dnak-dnaj-chaperone-team
#5
Xibing Xu, Ke Liang, Yulong Niu, Yan Shen, Xuedong Wan, Haiyan Li, Yi Yang
In Escherichia coli, the DnaK/DnaJ chaperone can control the stability and activity of σ32, which is the key factor in heat shock response. Heterologous expression of eukaryotic molecular chaperones protects E. coli from heat stress. Here, we show that BAH1, an E3 ligase from plant that has a similar zinc finger domain to DnaJ, can perform block the effect of DnaK on σ32 in Escherichia coli. By constructing a chimeric DnaJ protein, with the J-domain of DnaJ fused to BAH1, we found BAH1 could partially compensate for the DnaJ' zinc finger domain in vivo, and that it was dependent on the zinc finger domain of BAH1...
December 20, 2017: Current Microbiology
https://www.readbyqxmd.com/read/29229733/expression-of-tlr2-by-dendritic-cells-is-essential-for-dnaj-%C3%AE-a146ply-mediated-th1-immune-response-against-streptococcus-pneumoniae
#6
Xiaofang Wang, Taixian Yuan, Jun Yuan, Yufeng Su, Xiaoyu Sun, Jingwen Wu, Hong Zhang, Xun Min, Xuemei Zhang, Yibing Yin
The fusion protein, DnaJ-ΔA146Ply, could induce cross-protective immunity against pneumococcal infection via mucosal and subcutaneous immunization in mice in the absence of additional adjuvants. DnaJ and Ply are both TLR4 but not TLR2 ligands. However, we found that TLR2-/- mice immunized subcutaneously with DnaJ-ΔA146Ply showed significantly lower survival rates and higher bacterial loads in nasal washes than those of WT mice after being challenged with pneumococcal strains D39 or 19F. The IFN-γ level in splenocytes decreased in TLR2-/- mice, indicating that Th1 immunity elicited by DnaJ-ΔA146Ply was impaired in TLR2-/- mice...
December 11, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29203718/dnaj-proteins-in-neurodegeneration-essential-and-protective-factors
#7
REVIEW
Christina Zarouchlioti, David A Parfitt, Wenwen Li, Lauren M Gittings, Michael E Cheetham
Maintenance of protein homeostasis is vitally important in post-mitotic cells, particularly neurons. Neurodegenerative diseases such as polyglutamine expansion disorders-like Huntington's disease or spinocerebellar ataxia (SCA), Alzheimer's disease, fronto-temporal dementia (FTD), amyotrophic lateral sclerosis (ALS) and Parkinson's disease-are often characterized by the presence of inclusions of aggregated protein. Neurons contain complex protein networks dedicated to protein quality control and maintaining protein homeostasis, or proteostasis...
January 19, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29150173/genetic-studies-to-re-affiliate-edwardsiella-tarda-fish-isolates-to-edwardsiella-piscicida-and-edwardsiella-anguillarum-species
#8
Noemí Buján, Haitham Mohammed, Sabela Balboa, Jesús L Romalde, Alicia E Toranzo, Cova R Arias, Beatriz Magariños
Until 2012, the genus Edwardsiella was composed by three species Edwardsiella tarda, Edwardsiella hoshinae and Edwardsiella ictaluri. In 2013, Edwardsiella piscicida, compiling fish pathogenic strains previously identified as E. tarda was described, and more recently a new species isolated from diseased eel was reported, namely Edwardsiella anguillarum. The incorporation of these species into the genus makes necessary a revision of the taxonomic position of the isolates previously identified as E. tarda. Using AFLP technique, MLSA studies and in silico DNA-DNA hybridization, 46 of 49 E...
November 3, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/29123535/trait-and-marker-associations-in-oryza-nivara-and-o-rufipogon-derived-rice-lines-under-two-different-heat-stress-conditions
#9
V Vishnu Prasanth, M Suchandranath Babu, Ramana K Basava, V G N Tripura Venkata, Satendra K Mangrauthia, S R Voleti, Sarla Neelamraju
Wild species and derived introgression lines (ILs) are a good source of genes for improving complex traits such as heat tolerance. The effect of heat stress on 18 yield traits was studied in four treatments in two seasons, under field conditions by subjecting 37 ILs and recurrent parents Swarna and KMR3, N22 mutants, and wild type and 2 improved rice cultivars to heat stress using polycover house method in wet season and late sowing method in dry season. Normal grown unstressed plants were controls. Both correlation and path coefficient analysis showed that the major contributing traits for high yield per plant (YPP) under heat stress conditions were tiller number, secondary branches in panicle, filled grain number, and percent spikelet fertility...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29116036/bifidobacterium-callitrichidarum-sp-nov-from-the-faeces-of-the-emperor-tamarin-saguinus-imperator
#10
Monica Modesto, Samanta Michelini, Maria Cristina Sansosti, Carlotta De Filippo, Duccio Cavalieri, Linnea Qvirist, Thomas Andlid, Caterina Spiezio, Camillo Sandri, Stefano Pascarelli, Barbara Sgorbati, Paola Mattarelli
Three Gram-stain-positive, non-spore-forming, microaerophilic and fructose-6-phosphate phosphoketolase positive strains were isolated from a faecal sample of an adult subject of the emperor tamarin (Saguinus imperator). Given that the isolates revealed identical BOX PCR profiles, strain TRI 5(T) was selected as a representative and characterized further. Comparative analysis of 16S rRNA gene sequence similarity revealed that strain TRI 5(T) was closely related to Bifidobacterium saguini DSM 23967(T) (96.4 %) and to Bifidobacterium longum subsp...
November 8, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29113809/mir21-drives-resistance-to-heat-shock-protein-90-inhibition-in-cholangiocarcinoma
#11
Andrea Lampis, Pietro Carotenuto, Georgios Vlachogiannis, Luciano Cascione, Somaieh Hedayat, Rosemary Burke, Paul Clarke, Else Bosma, Michele Simbolo, Aldo Scarpa, Sijia Yu, Rebecca Cole, Elizabeth Smyth, Javier Fernández Mateos, Ruwaida Begum, Blanka Hezelova, Zakaria Eltahir, Andrew Wotherspoon, Nicos Fotiadis, Maria Antonietta Bali, Chirag Nepal, Khurum Khan, Mark Stubbs, Jens C Hahne, Pierluigi Gasparini, Vincenza Guzzardo, Carlo M Croce, Suzanne Eccles, Matteo Fassan, David Cunningham, Jesper B Andersen, Paul Workman, Nicola Valeri, Chiara Braconi
BACKGROUND & AIMS: Cholangiocarcinomas (CCA) are resistant to chemotherapy, so new therapeutic agents are needed. We performed a screen to identify small molecule compounds that are active against CCAs. Levels of microRNA 21 (MIR21 or miRNA21) are increased in CCAs. We investigated whether miRNA21 mediates resistance of CCA cells and organoids to HSP90 inhibitors. METHODS: We performed a high-throughput screen of 484 small molecule compounds to identify those that reduced viability of 6 human CCA cell lines...
November 4, 2017: Gastroenterology
https://www.readbyqxmd.com/read/29107750/molecular-cloning-prokaryotic-expression-purification-structural-studies-and-functional-implications-of-heat-shock-protein-70-hsp70-from-rutilus-frisii-kutum
#12
Zohreh Jahangirizadeh, Hossein Ghafouri, Reza H Sajedi, Sajjad Sarikhan, Majid Taghdir, Reyhaneh Sariri
A novel Hsp70 chaperone from Rutilus frisii kutum was identified, cloned, expressed, purified and its functional characteristics revealed. The 3D structure of Hsp70 from Rutilus kutum was constructed using the crystal structure of E. coli Hsp70 as the template, with 47% sequence identity. The in vitro ATPase activity assay after 60minutes, ATP hydrolysis of purified recombinant Hsp70 (8μM) was improved by binding to denatured thermally luciferase (3μM) about 2.5-fold compared with that of Hsp70 alone. Based on the results, it was found that the purified Hsp70 chaperone was able to considerably suppress heat-induced aggregation of luciferase by binding to DnaJ co-chaperone (5μM) more than 70% after 10min at 42°C...
October 28, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29097624/dnaj-homolog-subfamily-b-member-9-is-a-putative-autoantigen-in-fibrillary-gn
#13
Nicole K Andeen, Han-Yin Yang, Dao-Fu Dai, Michael J MacCoss, Kelly D Smith
Fibrillary GN is a rare form of GN of uncertain pathogenesis that is characterized by the glomerular accumulation of randomly arranged, nonbranching fibrils (12-24 nm) composed of Ig and complement proteins. In this study, we used mass spectrometry to comprehensively define the glomerular proteome in fibrillary GN compared with that in controls and nonfibrillary GN renal diseases. We isolated glomeruli from formalin-fixed and paraffin-embedded biopsy specimens using laser capture microdissection and analyzed them with liquid chromatography and data-dependent tandem mass spectrometry...
November 2, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29097623/dnaj-heat-shock-protein-family-b-member-9-is-a-novel-biomarker-for-fibrillary-gn
#14
Surendra Dasari, Mariam P Alexander, Julie A Vrana, Jason D Theis, John R Mills, Vivian Negron, Sanjeev Sethi, Angela Dispenzieri, W Edward Highsmith, Samih H Nasr, Paul J Kurtin
Fibrillary GN (FGN) is a rare primary glomerular disease. Histologic and histochemical features of FGN overlap with those of other glomerular diseases, and no unique histologic biomarkers for diagnosing FGN have been identified. We analyzed the proteomic content of glomeruli in patient biopsy specimens and detected DnaJ heat shock protein family (Hsp40) member B9 (DNAJB9) as the fourth most abundant protein in FGN glomeruli. Compared with amyloidosis glomeruli, FGN glomeruli exhibited a >6-fold overexpression of DNAJB9 protein...
November 2, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29082339/dnajc18-a-novel-type-iii-dnaj-family-protein-is-expressed-specifically-in-rat-male-germ-cells
#15
Cynthia Gomes, Jaemog Soh
Mammalian spermatogenesis occurs in a precise and coordinated manner in the seminiferous tubules. One of the attempts to understand the detailed biological process during mammalian spermatogenesis at the molecular level has been to identify the testis specific genes followed by study of the testicular expression pattern of the genes. From the subtracted cDNA library of rat testis prepared using representational difference analysis (RDA) method, a complimentary DNA clone encoding type III member of a DnaJ family protein, DnaJC18, was cloned (GenBank Accession No...
September 2017: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/29079617/staphylococcus-edaphicus-sp-nov-isolated-in-antarctica-harbours-mecc-gene-and-genomic-islands-with-suspected-role-in-adaptation-to-extreme-environment
#16
Roman Pantůček, Ivo Sedláček, Adéla Indráková, Veronika Vrbovská, Ivana Mašlaňová, Vojtěch Kovařovic, Pavel Švec, Stanislava Králová, Lucie Krištofová, Jana Kekláková, Petr Petráš, Jiří Doškař
Two Gram-stain-positive, coagulase-negative staphylococcal strains were isolated from abiotic sources, stone fragments and sandy soil in James Ross Island, Antarctica. Here we describe properties of novel species of the genus Staphylococcus that has near identical 16S rRNA gene sequence to Staphylococcus saprophyticus However, compared to S. saprophyticus and the next closest relatives, the new species demonstrates considerable phylogenetic distance at whole genome level, average nucleotide identity <85 %, and inferred DNA-DNA hybridization <30%...
October 27, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29063205/steered-molecular-dynamics-simulation-of-the-binding-of-the-bovine-auxilin-j-domain-to-the-hsc70-nucleotide-binding-domain
#17
You-Lin Xue, Lei Zhou, Yuna Sun, Hui Li, Gary W Jones, Youtao Song
The Hsp70 and Hsp40 chaperone machine plays critical roles in protein folding, membrane translocation, and protein degradation by binding and releasing protein substrates in a process that utilizes ATP. The activities of the Hsp70 family of chaperones are recruited and stimulated by the J domains of Hsp40 chaperones. However, structural information on the Hsp40-Hsp70 complex is lacking, and the molecular details of this interaction are yet to be elucidated. Here we used steered molecular dynamics (SMD) simulations to investigate the molecular interactions that occur during the dissociation of the auxilin J domain from the Hsc70 nucleotide-binding domain (NBD)...
October 23, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29018419/gene-expression-response-of-salmonella-enterica-serotype-enteritidis-phage-type-8-to-subinhibitory-concentrations-of-the-plant-derived-compounds-trans-cinnamaldehyde-and-eugenol
#18
Anup Kollanoor Johny, Jonathan G Frye, Annie Donoghue, Dan J Donoghue, Steffen Porwollik, Michael McClelland, Kumar Venkitanarayanan
Background:Salmonella Enteritidis phage type 8 (PT8) is a major poultry-associated Salmonella strain implicated in foodborne outbreaks in the United States. We previously reported that two plant-derived compounds generally recognized as safe (GRAS), trans-cinnamaldehyde (TC), and eugenol (EG), significantly reduced S. Enteritidis colonization in broiler and layer chickens. To elucidate potential PT8 genes affected by TC and EG during colonization, a whole-genome microarray analysis of the bacterium treated with TC and EG was conducted...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28964653/a-case-report-of-vibrio-furnissii-bacteremia-and-cellulitis-in-a-malnourished-patient-without-an-apparent-site-of-entry
#19
Takehiro Hashimoto, Saho Takaya, Satoshi Kutsuna, Kayoko Hayakawa, Daisuke Shiojiri, Yuichi Katanami, Kei Yamamoto, Nozomi Takeshita, Norio Ohmagari
We herein report a case of Vibrio furnissii bacteremia with bilateral lower limb cellulitis. A 53-year-old Japanese man with a mood disorder presented to our hospital with fever and a complaint of an inability to walk. Two sets of blood cultures became positive for V. furnissii. The treatment regimen was modified to ceftazidime and doxycycline. The patient recovered without relapse. Despite thorough examinations, portal of entry of V. furnissii remained unclear. Although the bacteria was first misidentified as V...
September 27, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28956354/heterologous-prime-boost-immunization-with-live-spy1-and-dnaj-protein-of-streptococcus-pneumoniae-induces-strong-th1-and-th17-cellular-immune-responses-in-mice
#20
Yulan Qiu, Xuemei Zhang, Hong Wang, Xinyuan Zhang, Yunjun Mo, Xiaoyu Sun, Jichao Wang, Yibing Yin, Wenchun Xu
Streptococcus pneumoniae is a leading cause of infectious diseases in children under 5-year-old. Vaccine has been used as an indispensable strategy to prevent S. pneumoniae infection for more than 30 years. Our previous studies confirmed that mucosal immunization with live attenuated strain SPY1 can protect mice against nasopharyngeal colonization of S. pneumoniae and lethal pneumococcal infection, and the protective effects are comparable with those induced by commercially available 23-valent polysaccharide vaccine...
October 2017: Journal of Microbiology / the Microbiological Society of Korea
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