scholarly journals Biochemical and electrophysiological characterization of N- glycans on NMDA receptor subunits

2016 ◽  
Vol 138 (4) ◽  
pp. 546-556 ◽  
Author(s):  
Martina Kaniakova ◽  
Katarina Lichnerova ◽  
Kristyna Skrenkova ◽  
Ladislav Vyklicky ◽  
Martin Horak
Keyword(s):  
Nmda Receptor ◽  
Nmda Receptor Subunits ◽  
Electrophysiological Characterization

Characterization of Glutamate Binding Sites in Receptors Assembled from Transfected NMDA Receptor Subunits

2002 ◽  
Vol 67 (2) ◽  
pp. 608-616 ◽  
Author(s):  
Shelley J. Kendrick ◽  
David R. Lynch ◽  
Dolan B. Pritchett
Keyword(s):  
Nmda Receptor ◽  
Binding Sites ◽  
Nmda Receptor Subunits ◽  
Glutamate Binding

Electrophysiological characterization of a novel potent and orally active NMDA receptor antagonist: CGP 37849 and its ethylester CGP 39551

1990 ◽  
Vol 182 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Mario F. Pozza ◽  
Hans-Rudolf Olpe ◽  
Felix Brugger ◽  
Graham E. Fagg
Keyword(s):  
Nmda Receptor ◽  
Receptor Antagonist ◽  
Nmda Receptor Antagonist ◽  
Cgp 37849 ◽  
Cgp 39551 ◽  
Electrophysiological Characterization ◽  
Orally Active

scholarly journals Pharmacological and Electrophysiological Characterization of Novel NMDA Receptor Antagonists

2018 ◽  
Vol 9 (11) ◽  
pp. 2722-2730 ◽  
Author(s):  
Rosana Leiva ◽  
Matthew B. Phillips ◽  
Andreea L. Turcu ◽  
Esther Gratacòs-Batlle ◽  
Lara León-García ◽  
...  
Keyword(s):  
Nmda Receptor ◽  
Nmda Receptor Antagonists ◽  
Receptor Antagonists ◽  
Electrophysiological Characterization

Electrophysiological Characterization of Transport Across Outer Membrane Channels from Gram-Negative Bacteria in Their Native Environment

2019 ◽  
Author(s):  
Jiajun Wang ◽  
Rémi Terrasse ◽  
Jayesh Arun Bafna ◽  
Lorraine Benier ◽  
Mathias Winterhalter
Keyword(s):  
Outer Membrane ◽  
Lipid Membrane ◽  
Membrane Vesicles ◽  
Outer Membrane Vesicles ◽  
Multi Drug Resistance ◽  
Gram Negative Bacteria ◽  
Membrane Channels ◽  
Gram Negative ◽  
Electrophysiological Characterization

Multi-drug resistance in Gram-negative bacteria is often associated with low permeability of the outer membrane. To investigate the role of membrane channels in the uptake of antibiotics, we extract, purify and reconstitute them into artificial planar membranes. To avoid this time-consuming procedure, here we show a robust approach using fusion of native outer membrane vesicles (OMV) into planar lipid bilayer which moreover allows also to some extend the characterization of membrane protein channels in their native environment. Two major membrane channels from <i>Escherichia coli</i>, OmpF and OmpC, were overexpressed from the host and the corresponding OMVs were collected. Each OMV fusion revealed surprisingly single or only few channel activities. The asymmetry of the OMV´s translates after fusion into the lipid membrane with the LPS dominantly present at the side of OMV addition. Compared to conventional reconstitution methods, the channels fused from OMVs containing LPS have similar conductance but a much broader distribution. The addition of Enrofloxacin on the LPS side yields somewhat higher association (<i>k<sub>on</sub></i>) and lower dissociation (<i>k<sub>off</sub></i>) rates compared to LPS-free reconstitution. We conclude that using outer membrane vesicles is a fast and easy approach for functional and structural studies of membrane channels in the native membrane.

scholarly journals Electrophysiological characterization of a diverse group of sugar transporters from Trichoderma reesei

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sami Havukainen ◽  
Jonai Pujol-Giménez ◽  
Mari Valkonen ◽  
Ann Westerholm-Parvinen ◽  
Matthias A. Hediger ◽  
...  
Keyword(s):  
Trichoderma Reesei ◽  
Scientific Literature ◽  
Large Body ◽  
Comprehensive Analysis ◽  
Transport Function ◽  
Sugar Transporters ◽  
New Knowledge ◽  
Electrophysiological Characterization ◽  
Shed Light

AbstractTrichoderma reesei is an ascomycete fungus known for its capability to secrete high amounts of extracellular cellulose- and hemicellulose-degrading enzymes. These enzymes are utilized in the production of second-generation biofuels and T. reesei is a well-established host for their production. Although this species has gained considerable interest in the scientific literature, the sugar transportome of T. reesei remains poorly characterized. Better understanding of the proteins involved in the transport of different sugars could be utilized for engineering better enzyme production strains. In this study we aimed to shed light on this matter by characterizing multiple T. reesei transporters capable of transporting various types of sugars. We used phylogenetics to select transporters for expression in Xenopus laevis oocytes to screen for transport activities. Of the 18 tested transporters, 8 were found to be functional in oocytes. 10 transporters in total were investigated in oocytes and in yeast, and for 3 of them no transport function had been described in literature. This comprehensive analysis provides a large body of new knowledge about T. reesei sugar transporters, and further establishes X. laevis oocytes as a valuable tool for studying fungal sugar transporters.

scholarly journals Electrophysiological characterization of contact sites in brain mitochondria.

1990 ◽  
Vol 265 (2) ◽  
pp. 908-913
Author(s):  
O Moran ◽  
G Sandri ◽  
E Panfili ◽  
W Stühmer ◽  
M C Sorgato
Keyword(s):  
Brain Mitochondria ◽  
Contact Sites ◽  
Electrophysiological Characterization

scholarly journals Developmental up-regulation of NMDA receptors in the prefrontal cortex and hippocampus of mGlu5 receptor knock-out mice

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Tiziana Imbriglio ◽  
Remy Verhaeghe ◽  
Nico Antenucci ◽  
Stefania Maccari ◽  
Giuseppe Battaglia ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Nmda Receptor ◽  
Metabotropic Glutamate Receptors ◽  
Adult Life ◽  
Developmental Time ◽  
Postnatal Life ◽  
Developmental Studies ◽  
Knock Out ◽  
Nmda Receptor Subunits ◽  
The Impact

AbstractmGlu5 metabotropic glutamate receptors are highly expressed and functional in the early postnatal life, and are known to positively modulate NMDA receptor function. Here, we examined the expression of NMDA receptor subunits and interneuron-related genes in the prefrontal cortex and hippocampus of mGlu5−/− mice and wild-type littermates at three developmental time points (PND9, − 21, and − 75). We were surprised to find that expression of all NMDA receptor subunits was greatly enhanced in mGlu5−/− mice at PND21. In contrast, at PND9, expression of the GluN2B subunit was enhanced, whereas expression of GluN2A and GluN2D subunits was reduced in both regions. These modifications were transient and disappeared in the adult life (PND75). Changes in the transcripts of interneuron-related genes (encoding parvalbumin, somatostatin, vasoactive intestinal peptide, reelin, and the two isoforms of glutamate decarboxylase) were also observed in mGlu5−/− mice across postnatal development. For example, the transcript encoding parvalbumin was up-regulated in the prefrontal cortex of mGlu5−/− mice at PND9 and PND21, whereas it was significantly reduced at PND75. These findings suggest that in mGlu5−/− mice a transient overexpression of NMDA receptor subunits may compensate for the lack of the NMDA receptor partner, mGlu5. Interestingly, in mGlu5−/− mice the behavioral response to the NMDA channel blocker, MK-801, was significantly increased at PND21, and largely reduced at PND75. The impact of adaptive changes in the expression of NMDA receptor subunits should be taken into account when mGlu5−/− mice are used for developmental studies.

scholarly journals Electrophysiological characterization of native Na+-HCO3-cotransporter current in bovine parotid acinar cells

2005 ◽  
Vol 568 (1) ◽  
pp. 181-197 ◽  
Author(s):  
Souichirou Yamaguchi ◽  
Toru Ishikawa
Keyword(s):  
Acinar Cells ◽  
Parotid Acinar Cells ◽  
Electrophysiological Characterization
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