Cyclic mononucleotides are messengers in plant stress responses. Here we show that hydrogen peroxide (H2O2) induces rapid net K(+)-efflux and Ca(2+)-influx in Arabidopsis roots. Pre-treatment with either 10μM cAMP or cGMP for 1 or 24h does significantly reduce net K(+)-leakage and Ca(2+)-influx, and in the case of the K(+)-fluxes, the cell permeant cyclic mononucleotides are more effective. We also examined the effect of 10μM of the cell permeant 8-Br-cGMP on the Arabidopsis microsomal proteome and noted a specific increase in proteins with a role in stress responses and ion transport, suggesting that cGMP is sufficient to directly and/or indirectly induce complex adaptive changes to cellular stresses induced by H2O2.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.febslet.2014.01.062 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Broad substrate scope C-C oxidation in cyclodipeptides catalysed by a flavin-dependent filament.
Nat Commun
January 2025
University of St Andrews, School of Biology, North Haugh, Biomolecular Sciences Building, St Andrews, UK.
Cyclic dipeptides are produced by organisms across all domains of life, with many exhibiting anticancer and antimicrobial properties. Oxidations are often key to their biological activities, particularly C-C bond oxidation catalysed by tailoring enzymes including cyclodipeptide oxidases. These flavin-dependent enzymes are underexplored due to their intricate three-dimensional arrangement involving multiple copies of two distinct small subunits, and mechanistic details underlying substrate selection and catalysis are lacking.
View Article and Find Full Text PDFGap junction intercellular communications regulates activation of SARM1 and protects against axonal degeneration.
Cell Death Dis
January 2025
State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
Sterile alpha and Toll/interleukin-1 receptor motif containing 1 (SARM1), a nicotinamide adenine dinucleotide (NAD)-utilizing enzyme, mediates axon degeneration (AxD) in various neurodegenerative diseases. It is activated by nicotinamide mononucleotide (NMN) to produce a calcium messenger, cyclic ADP-ribose (cADPR). This activity is blocked by elevated NAD level.
View Article and Find Full Text PDFAlkane degradation coupled to Fe(III) reduction mediated by Gram-positive bacteria.
J Hazard Mater
December 2024
State Key Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China. Electronic address:
Petroleum hydrocarbon contamination, such as n-alkanes, poses a significant global threat to ecosystems and human health. Microbial remediation emerges as a promising strategy for addressing this issue through both aerobic and anaerobic processes. Notably, the majority of anaerobic hydrocarbon degraders identified to date are Gram-negative bacteria.
View Article and Find Full Text PDFAsymmetric Monoreduction of α,β-Dicarbonyls to α-Hydroxy Carbonyls by Ene Reductases.
ACS Catal
October 2024
Biocatalysis section, Department of Biotechnology, Delft University of Technology, van der Maasweg 9, Delft 2629 HZ, the Netherlands.
Ene reductases (EREDs) catalyze asymmetric reduction with exquisite chemo-, stereo-, and regioselectivity. Recent discoveries led to unlocking other types of reactivities toward oxime reduction and reductive C-C bond formation. Exploring nontypical reactions can further expand the biocatalytic knowledgebase, and evidence alludes to yet another variant reaction where flavin mononucleotide (FMN)-bound ERs from the old yellow enzyme family (OYE) have unconventional activity with α,β-dicarbonyl substrates.
View Article and Find Full Text PDFSimultaneous spectral illumination of microplates for high-throughput optogenetics and photobiology.
Biol Chem
December 2024
Department of Neurology with Experimental Neurology, Translational Neuromodulation Group, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, D-10117 Berlin, Germany.
The biophysical characterization and engineering of optogenetic tools and photobiological systems has been hampered by the lack of efficient methods for spectral illumination of microplates for high-throughput analysis of action spectra. Current methods to determine action spectra only allow the sequential spectral illumination of individual wells. Here we present the open-source RainbowCap-system, which combines LEDs and optical filters in a standard 96-well microplate format for simultaneous and spectrally defined illumination.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!