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951.
Thomas Wiegand Wei-Chih Liao Ta Chung Ong Alexander Däpp Riccardo Cadalbert Christophe Copéret Anja Böckmann Beat H. Meier 《Journal of biomolecular NMR》2017,69(3):157-164
DNP (dynamic nuclear polarization)-enhanced solid-state NMR is employed to directly detect protein–DNA and protein–ATP interactions and identify the residue type establishing the intermolecular contacts. While conventional solid-state NMR can detect protein–DNA interactions in large oligomeric protein assemblies in favorable cases, it typically suffers from low signal-to-noise ratios. We show here, for the oligomeric DnaB helicase from Helicobacter pylori complexed with ADP and single-stranded DNA, that this limitation can be overcome by using DNP-enhanced spectroscopy. Interactions are established by DNP-enhanced 31P–13C polarization-transfer experiments followed by the recording of a 2D 13C–13C correlation experiment. The NMR spectra were obtained in less than 2 days and allowed the identification of residues of the motor protein involved in nucleotide binding. 相似文献
952.
The two‐component response regulator Skn7 belongs to a network of transcription factors regulating morphogenesis in Candida albicans and independently limits morphogenesis‐induced ROS accumulation
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953.
954.
Meeting after meeting: 20 years of discoveries by the members of the Exocytosis–Endocytosis Club
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Florence Niedergang Stéphane Gasman Nicolas Vitale Claire Desnos Christophe Lamaze 《Biology of the cell / under the auspices of the European Cell Biology Organization》2017,109(9):339-353
Twenty years ago, a group of French cell biologists merged two scientific clubs with the aim of bringing together researchers in the fields of Endocytosis and Exocytosis. Founded in 1997, the first annual meeting of the Exocytosis Club was held in 1998. The Endocytosis Club held quarterly meetings from its founding in 1999. The first joint annual meeting of the Exocytosis–Endocytosis Club took place in Paris in April, 2001. What started as a modest gathering of enthusiastic scientists working in the field of cell trafficking has gone from strength to strength, rapidly becoming an unmissable yearly meeting, vividly demonstrating the high quality of science performed in our community and beyond. On the occasion of the 20th meeting of our club, we want to provide historic insight into the fields of exocytosis and endocytosis, and by extension, to subcellular trafficking, highlighting how French scientists have contributed to major advances in these fields. Today, the Exocytosis–Endocytosis Club represents a vibrant and friendly community that will hold its 20th meeting at the Presqu'Ile de Giens, near Toulon in the South of France, on May 11–13, 2017. 相似文献
955.
Abel Barral Bernard Gomez Juan M. Zorrilla José M. Serrano Johan Yans Véronique Daviero‐Gomez Timothy A.M. Ewin Christophe Lécuyer 《Lethaia: An International Journal of Palaeontology and Stratigraphy》2017,50(2):244-257
Two plant fossil‐bearing beds from the middle Barremian of Belgium were analysed to ascertain how experimental designs affect conclusions regarding palaeodiversity at a local scale. We analysed eight lateral samples per bed taken regularly every 3 m using an exhaustive sub‐sampling method. The Clench equation was used to evaluate the completeness of the taxonomic inventory of the samples and the sampling effort needed to obtain a reliable representation of diversity. The number of replicates needed to obtain the same representation of diversity from different nearby lateral samples of the same bed ranged from 5 to 19. Richness (S), Evenness (J) and the number of equiprobable taxa (2H’) greatly varied between samples from the same bed, even over short distances. Only one of the studied samples was representative of the taxonomic inventory of its bed. Our study shows that 1) the selection bias of the sampling area is reduced by increasing the number of lateral samples taken in a bed, enabling more reliable conclusions about local‐scale diversity; 2) intense sub‐sampling methods are needed to account for statistically independent observations of detailed lateral variation; and 3) sampling methods in palaeodiversity analyses must look for a similar degree of representativeness in samples rather than a homogeneous sample size. Using a sampling effort analysis provides evidence for the completeness of the data set, adjusting the amount of work required. Implementing the Clench equation in palaeodiversity analyses improves the performance of data acquisition in palaeoecological studies and provides a quality test of the data sets derived from them. 相似文献
956.
Pradier Céline Hinsinger Philippe Laclau Jean-Paul Bouillet Jean-Pierre Guerrini Irae Amaral Gonçalves José Leonardo Moraes Asensio Verónica Abreu-Junior Cassio H. Jourdan Christophe 《Plant and Soil》2017,414(1-2):339-354
Plant and Soil - Comparing root functioning under contrasting rainfall regimes can help assessing the capacity of plant species to cope with more intense and frequent drought predicted under... 相似文献
957.
Geomorphic influence on intraspecific genetic differentiation and diversity along hyporheic corridors
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Florian Malard Cécile Capderrey Benjamin Churcheward David Eme Bernard Kaufmann Lara Konecny‐Dupré Jean‐Paul Léna Frédéric Liébault Christophe J. Douady 《Freshwater Biology》2017,62(12):1955-1970
958.
959.
Evelyne Picard-Meyer Alexandre Servat Marine Wasniewski Matthieu Gaillard Christophe Borel Florence Cliquet 《BMC veterinary research》2017,13(1):387
Background
Rabies is a fatal viral encephalitic disease that is caused by lyssaviruses which can affect all mammals, including human and bats. In Europe, bat rabies cases are attributed to five different lyssavirus species, the majority of rabid bats being attributed to European bat 1 lyssavirus (EBLV-1), circulating mainly in serotine bats (Eptesicus serotinus). In France, rabies in bats is under surveillance since 1989, with 77 positive cases reported between 1989 and 2016.Case presentation
In the frame of the bat rabies surveillance, an unusual mortality of serotine bats was reported in 2009 in a village in North-East France. Six juvenile bats from an E. serotinus maternity colony counting ~200 individuals were found to be infected with EBLV-1. The active surveillance of the colony by capture sessions of bats from July to September 2009 showed a high detection rate of neutralising EBLV-1 antibodies (≈ 50%) in the colony. Moreover, one out of 111 animals tested was found to shed viable virus in saliva, while lyssavirus RNA was detected by RT-PCR for five individuals.Conclusion
This study demonstrated that the lyssavirus infection in the serotine maternity colony was followed by a high rate of bat rabies immunity after circulation of the virus in the colony. The ratio of seropositive bats is probably indicative of an efficient virus transmission coupled to a rapid circulation of EBLV-1 in the colony.960.
Atomic Layer Deposition of Functional Layers for on Chip 3D Li‐Ion All Solid State Microbattery
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Manon Létiche Etienne Eustache Jeremy Freixas Arnaud Demortière Vincent De Andrade Laurence Morgenroth Pascal Tilmant François Vaurette David Troadec Pascal Roussel Thierry Brousse Christophe Lethien 《Liver Transplantation》2017,7(2)
Nowadays, millimeter scale power sources are key devices for providing autonomy to smart, connected, and miniaturized sensors. However, until now, planar solid state microbatteries do not yet exhibit a sufficient surface energy density. In that context, architectured 3D microbatteries appear therefore to be a good solution to improve the material mass loading while keeping small the footprint area. Beside the design itself of the 3D microbaterry, one important technological barrier to address is the conformal deposition of thin films (lithiated or not) on 3D structures. For that purpose, atomic layer deposition (ALD) technology is a powerful technique that enables conformal coatings of thin film on complex substrate. An original, robust, and highly efficient 3D scaffold is proposed to significantly improve the geometrical surface of miniaturized 3D microbattery. Four functional layers composing the 3D lithium ion microbattery stacking has been successfully deposited on simple and double microtubes 3D templates. In depth synchrotron X‐ray nanotomography and high angle annular dark field transmission electron microscope analyses are used to study the interface between each layer. For the first time, using ALD, anatase TiO2 negative electrode is coated on 3D tubes with Li3PO4 lithium phosphate as electrolyte, opening the way to all solid‐state 3D microbatteries. The surface capacity is significantly increased by the proposed topology (high area enlargement factor – “thick” 3D layer), from 3.5 μA h cm?2 for a planar layer up to 0.37 mA h cm?2 for a 3D thin film (105 times higher). 相似文献