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|  | | 13 March 2012 | | | Featured image: | |  | | | Reimer et al. fabricate single photon nanowire waveguides with quantum dots positioned exactly on their axis. |
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Advertisement | | | | | | | | Latest Articles | View all Articles | | | | | Sensitivity control through attenuation of signal transfer efficiency by negative regulation of cellular signalling | | | Yu Toyoshima, Hiroaki Kakuda, Kazuhiro A. Fujita, Shinsuke Uda and Shinya Kuroda | | | How the sensitivity of biological and pharmacological signalling responses is controlled is poorly understood. Here, computational analyses and cellular experiments show that the sensitivity of a simple biochemical reaction to activators and inhibitors is controlled by negative regulation of cellular signalling. | | | 13 Mar | Nat Commun 3:743 doi:10.1038/ncomms1745 (2012) | | | Biological sciences Systems biology | | Abstract | Full Text | PDF (1,215 kB) |
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| Integrated photosystem II-based photo-bioelectrochemical cells | | | Omer Yehezkeli, Ran Tel-Vered, Julian Wasserman, Alexander Trifonov, Dorit Michaeli, Rachel Nechushtai and Itamar Willner | | | The photosynthetic reaction centres, photosystems I and II, have been investigated for the light-induced generation of fuels and electrical power. Now, Yehezkeli et al. report a photobiofuel cell that generates electricity upon irradiation of photosystem II-functionalized electrodes in aqueous solutions. | | | 13 Mar | Nat Commun 3:742 doi:10.1038/ncomms1741 (2012) | | | Chemical sciences Catalysis | | | Materials science | | Abstract | Full Text | PDF (578 kB) |
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| Fast and ultrasensitive method for quantitating prion infectivity titre | | | Natallia Makarava, Regina Savtchenko, Irina Alexeeva, Robert G. Rohwer and Ilia V. Baskakov | | | Bioassays are the standard way to measure prion infectivity titres, but can be time-consuming. In this study, bioassays are compared with a modified version of the protein misfolding cyclic amplification technique with beads (PMCAb), demonstrating that PMCAb can be more precise and faster than bioassays. | | | 13 Mar | Nat Commun 3:741 doi:10.1038/ncomms1730 (2012) | | | Biological sciences Biotechnology | | | Cell biology Neuroscience | | | | | Abstract | Full Text | PDF (448 kB) |
| Multiple exposures to drought 'train' transcriptional responses in Arabidopsis | | | Yong Ding, Michael Fromm and Zoya Avramova | | | Whether plants can remember their transcriptional response to stress is unknown. By repeatedly exposing Arabidopsis to drought, we show that the plants remember their transcriptional response to stress and that the altered genes retain the epigenetic mark H3K4me3 and stalled phosphorylated polymerase II. | | | 13 Mar | Nat Commun 3:740 doi:10.1038/ncomms1732 (2012) | | | Biological sciences Molecular biology Plant sciences | | Abstract | Full Text | PDF (565 kB) |
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| Odour concentration-dependent olfactory preference change in C. elegans | | | Kazushi Yoshida, Takaaki Hirotsu, Takanobu Tagawa, Shigekazu Oda, Tokumitsu Wakabayashi, Yuichi Iino and Takeshi Ishihara | | | Some animals find the same odorant attractive at high concentrations and repulsive at low concentrations, but how this discrimination occurs is unclear. Using Caenorhabditis elegans as a model system, Yoshida et al. show that different sets of sensory neurons respond to low and high concentrations of odours. | | | 13 Mar | Nat Commun 3:739 doi:10.1038/ncomms1750 (2012) | | | Biological sciences Neuroscience | | Abstract | Full Text | PDF (8,477 kB) |
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| Intracellular chloride concentration influences the GABAA receptor subunit composition OPEN | | | Francesca Succol, Hubert Fiumelli, Fabio Benfenati, Laura Cancedda and Andrea Barberis | | | During development there is a change in the expression of GABAA receptor subunits. Here, Succol and colleagues show that chloride ions mediate the change in α3-α1 and δ-containing GABAA receptors that mediate phasic and tonic inhibition, respectively. | | | 13 Mar | Nat Commun 3:738 doi:10.1038/ncomms1744 (2012) | | | Biological sciences Biophysics | | | Cell biology Neuroscience | | | Abstract | Full Text | PDF (1,654 kB) |
| Bright single-photon sources in bottom-up tailored nanowires OPEN | | | Michael E. Reimer, Gabriele Bulgarini, Nika Akopian, Moïra Hocevar, Maaike Bouwes Bavinck, Marcel A. Verheijen, Erik P.A.M. Bakkers, Leo P. Kouwenhoven and Val Zwiller | | | Single-photon sources are important for quantum optical technologies, although achieving efficient light extraction from them with waveguides is limited in top-down approaches. Reimer et al. show a high extraction efficiency using a bottom-up method to grow quantum dots on the axis of nanowire waveguides. | | | 13 Mar | Nat Commun 3:737 doi:10.1038/ncomms1746 (2012) | | | Physical sciences Applied physics | | | Nanotechnology Optical physics | | | Abstract | Full Text | PDF (1,177 kB) |
| Infrared light excites cells by changing their electrical capacitance OPEN | | | Mikhail G. Shapiro, Kazuaki Homma, Sebastian Villarreal, Claus-Peter Richter and Francisco Bezanilla | | | Pulsed infrared laser light can directly stimulate nerves and muscles, but the underlying biophysical mechanism has remained enigmatic. This study reveals that infrared pulses depolarize target cells by reversibly altering the electrical capacitance of the plasma membrane. | | | 13 Mar | Nat Commun 3:736 doi:10.1038/ncomms1742 (2012) | | | Biological sciences Biophysics | | | | Abstract | Full Text | PDF (4,729 kB) |
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| Activation of canonical Wnt signalling is required for TGF-β-mediated fibrosis OPEN | | | Alfiya Akhmetshina, Katrin Palumbo, Clara Dees, Christina Bergmann, Paulius Venalis, Pawel Zerr, Angelika Horn, Trayana Kireva, Christian Beyer, Jochen Zwerina, Holm Schneider, Anika Sadowski, Marc-Oliver Riener, Ormond A. MacDougald, Oliver Distler, Georg Schett and Jörg H.W. Distler | | | Aberrant activation of the TGF-β pathway leads to fibrotic disease. Distler and colleagues show that TGF-β-mediated fibrosis requires the decrease of Dickkopf-1, an antagonist of canonical Wnt signalling, suggesting that the two pathways interact for the manifestation of this disease. | | | 13 Mar | Nat Commun 3:735 doi:10.1038/ncomms1734 (2012) | | | Biological sciences Cell biology | | | Medical research | | Abstract | Full Text | PDF (1,458 kB) |
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| Probing charge scattering mechanisms in suspended graphene by varying its dielectric environment | | | A.K.M. Newaz, Yevgeniy S. Puzyrev, Bin Wang, Sokrates T. Pantelides and Kirill I. Bolotin | | | A factor limiting the mobility of charge carriers in graphene, and therefore its use in electronic applications, is the Coulomb scattering due to charged impurities. By exposing graphene devices to a range of non-polar liquids, Newaz et al. observe an enhancement of the mobility due to screening. | | | 13 Mar | Nat Commun 3:734 doi:10.1038/ncomms1740 (2012) | | | Physical sciences Applied physics | | | Condensed matter | | Abstract | Full Text | PDF (669 kB) |
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| SUMO modification of the neuroprotective protein TDP1 facilitates chromosomal single-strand break repair OPEN | | | Jessica J.R. Hudson, Shih-Chieh Chiang, Owen S. Wells, Chris Rookyard and Sherif F. El-Khamisy | | | Tyrosyl DNA phosphodiesterase 1 (TDP1) repairs DNA breaks and is mutated in the disease Spinocerebellar Ataxia with Axonal Neuropathy. Here TDP1 is shown to be post-translationally modified by sumoylation of lysine 111, and cells carrying a mutation at this residue are inefficient at single-strand DNA break repair. | | | 13 Mar | Nat Commun 3:733 doi:10.1038/ncomms1739 (2012) | | | Biological sciences Biochemistry | | | Molecular biology | | Abstract | Full Text | PDF (2,287 kB) |
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| Observation of conducting filament growth in nanoscale resistive memories | | | Yuchao Yang, Peng Gao, Siddharth Gaba, Ting Chang, Xiaoqing Pan and Wei Lu | | | Resistive switching devices are promising candidates for non-volatile memories. Using in-situ and ex-situ transmission electron microscopy, Yang et al. present an extensive study of the dynamics of filaments forming across the electrodes of resisting switching devices known as electrochemical metallization memories. | | | 13 Mar | Nat Commun 3:732 doi:10.1038/ncomms1737 (2012) | | | Physical sciences Applied physics | | | Materials science | | | Nanotechnology | | Abstract | Full Text | PDF (2,654 kB) |
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| Lipid storage disorders block lysosomal trafficking by inhibiting a TRP channel and lysosomal calcium release | | | Dongbiao Shen, Xiang Wang, Xinran Li, Xiaoli Zhang, Zepeng Yao, Shannon Dibble, Xian-ping Dong, Ting Yu, Andrew P. Lieberman, Hollis D. Showalter and Haoxing Xu | | | Accumulation of lysosomal lipids is a feature of Niemann'-Picks (NP) disease, but how these lipids contribute to the disease is unclear. In this study, calcium released via the lysosomal TRPML1 channel is shown to be reduced in NP-type C cells, and sphingomyelins are found to inhibit the channel's activity. | | | 13 Mar | Nat Commun 3:731 doi:10.1038/ncomms1735 (2012) | | | Biological sciences Cell biology | | | Chemical biology Neuroscience | | Abstract | Full Text | PDF (6,882 kB) |
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