Mitochondrial metabolism of guanine nucleotides possible role of guanosine [PDF]
, 1989 The catabolism of intramitochondrial guanine nucleotides was examined. During 30 min incubation of rat liver mitochondria at 37°C in the presence of oligomycin and carboxyatractyloside, guanine and xanthine were formed and appeared in the medium.
Dubiel, Wolfgang +6 more
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EspM2 is a RhoA guanine nucleotide exchange factor [PDF]
Cellular Microbiology, 2010 We investigated how the type III secretion system WxxxE effectors EspM2 of enterohaemorrhagic Escherichia coli, which triggers stress fibre formation, and SifA of Salmonella enterica serovar Typhimurium, which is involved in intracellular survival, modulate Rho GTPases.
Arbeloa, A +7 more
openaire +5 more sources
Guanine Nucleotide Exchange Assay Using Fluorescent MANT-GDP
Bio-Protocol, 2018 GTPases are molecular switches that cycle between the inactive GDP-bound state and the active GTP-bound state. GTPases exchange nucleotides either by its intrinsic nucleotide exchange or by interaction with guanine nucleotide exchange factors (GEFs ...
Tomoharu Kanie, Peter Jackson
doaj +1 more source
Advanced Raman spectroscopy detection of oxidative damage in nucleic acid bases: probing chemical changes and intermolecular interactions in guanosine at ultralow concentration [PDF]
, 2021 DNA/RNA synthesis precursors are especially vulnerable to damage induced by reactive oxygen species occurring following oxidative stress. Guanosine triphosphates are the prevalent oxidized nucleosites, which can be misincorporated during replication, leading to mutations and cell death. Here, we present a novel method based on micro-Raman spectroscopy,
arxiv +1 more source
Transglutaminase 5 is regulated by guanine–adenine nucleotides [PDF]
Biochemical Journal, 2004 Transglutaminases (TGases) are Ca2+-dependent enzymes capable of catalysing transamidation of glutamine residues to form intermolecular isopeptide bonds. Nine distinct TGases have been described in mammals, and two of them (types 2 and 3) are regulated by GTP/ATP. TGase2 hydrolyses GTP and is therefore a bifunctional enzyme.
CANDI, ELEONORA +10 more
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Nature Communications, 2020 Trypanosoma brucei guanosine 5′-monophosphate reductase (TbGMPR) catalyses the conversion of GMP to inosine 5′-monophosphate and contains a cystathionine-β-synthase (CBS) domain. Here the authors combine X-ray crystallography and kinetic measurements and
Akira Imamura +12 more
doaj +1 more source
Metabolic engineering of the purine biosynthetic pathway in Corynebacterium glutamicum results in increased intracellular pool sizes of IMP and hypoxanthine [PDF]
, 2012 Background: Purine nucleotides exhibit various functions in cellular metabolism. Besides serving as building blocks for nucleic acid synthesis, they participate in signaling pathways and energy metabolism.
Barduhn, Tobias +5 more
core +1 more source
Subcellular compartmentation of guanine nucleotides and functional relationships between the adenine and guanine nucleotide systems in isolated hepatocytes [PDF]
FEBS Letters, 1979 The subcellular compartmentation of adenine nucleotides between the mitochondria and the cytosol has been clearly demonstrated by the use of different cell fractionation techniques [ 1,2]. However, data concerning the subcellular distribution of guanine nucleotides are not available.
Christel Düls +2 more
openaire +3 more sources
Clerocidin selectively modifies the gyrase-DNA gate to induce irreversible and reversible DNA damage [PDF]
, 2008 Clerocidin (CL), a microbial diterpenoid, reacts with DNA via its epoxide group and stimulates DNA cleavage by type II DNA topoisomerases. The molecular basis of CL action is poorly understood.
Binaschi +34 more
core +1 more source
Common Mitochondrial DNA Mutations Generated through DNA-Mediated Charge Transport [PDF]
, 2009 Mutation sites that arise in human mitochondrial DNA as a result of oxidation by a rhodium photooxidant have been identified. HeLa cells were incubated with [Rh(phi)2bpy]Cl3 (phi is 9,10-phenanthrenequinone diimine), an intercalating photooxidant, to ...
Barton, Jacqueline K. +2 more
core +2 more sources