Abstract：
:A comparative study of the Cu2+ effects, binding and reduction, has been performed on rat liver mitochondria. In the first minutes, Cu2+ (less than or equal to 50 micron) is massively bound and reduced to the extent of 70%-80% while a simultaneous activation of respiration takes place. Then the remaining 20% or so of Cu2+ are progressively bound and reduced while respiratory inhibition, Ca2+ and Mg2+ effluxes, and swelling are observed. EDTA, used as a copper chelator, prevents or reduces the copper effects and removes part of the bound copper, according to the time of introduction in the incubation medium after Cu2+. The results suggest that the two steps of the copper binding and the effects following involve mainly first the outer (cytosol side) proteins of the inner membrane and then those of the inner membrane. 100 microM dithiothreitol and 100 microM glutathione used as antioxidant thiol reagents prevent, as does EDTA, but do not reverse the 25 microM copper effects. They also decrease the copper binding; however, no relationship between binding and preventive action is observed. It is shown that glutathione and dithiothreitol have a specific potent ability to reduce Cu2+, which explains that in presence of these reagents copper may react with mitochondria partly or entirely in the form of Cu+. These findings suggest that Cu2+ in its Cu+ form has no mitochondrial effect. A mechanism of copper action involving oxidation of some membrane thiol groups is discussed.
journal_name
J Inorg Biochemjournal_title
Journal of inorganic biochemistryauthors
Leblondel G,Allain Pdoi
10.1016/0162-0134(84)83007-xsubject
Has Abstractpub_date
1984-07-01 00:00:00pages
241-51issue
3eissn
0162-0134issn
1873-3344pii
0162-0134(84)83007-Xjournal_volume
21pub_type
杂志文章abstract：:The Cu-containing nitrite reductase from Hyphomicrobium denitrificans (HydNIR) has been spectroscopically and functionally characterized. The visible absorption spectrum implies that the enzyme has two type 1 Cu ions in one subunit (ca. 50 kDa). The electron paramagnetic resonance (EPR) spectrum of HydNIR is simulated...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(02)00442-7
更新日期：2002-07-25 00:00:00
abstract：:Aggregation of amyloid β-proteins (Aβ) induced by Cu2+ is a crucial element in the pathogenesis of Alzheimer's disease (AD), and cerebral acidosis is a common complication of AD. Under mildly acidic conditions, Cu2+-Aβ species have higher tendency to generate neurotoxic aggregates. Hence it is of significance to devel...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2017.03.009
更新日期：2017-06-01 00:00:00
abstract：:Genomics projects have elucidated several genes that encode protein sequences. Subsequently, the advent of the proteomics age has enabled the synthesis and 3D structure determination for these protein sequences. Some of these proteins incorporate metal atoms but it is often not known whether they are metal-binding pro...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2006.02.019
更新日期：2006-07-01 00:00:00
abstract：:A series of hybrid quantum mechanical/molecular mechanical (QM/MM) calculations was performed on models of a DNA duplex with artificial silver(I)-mediated imidazole base pairs. The optimized structures were compared to the original experimental NMR structure (Nat. Chem. 2 (2010) 229-234). The metal⋯metal distances are...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2013.03.009
更新日期：2013-10-01 00:00:00
abstract：:The new potential antitumour soluble drug K[Ru(eddp)Cl(2)].3H(2)O, (eddp=ethylenediamine-N,N'-di-3-propionate) has been isolated and characterized. The analysis of the interaction of this complex with pBR322 plasmid DNA by circular dichroism spectroscopy shows that the ruthenium complex initially induces alteration of...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(03)00281-2
更新日期：2003-10-01 00:00:00
abstract：:Copper(II) and zinc(II) complexes of the peptides Ac-HisValHis-NH2 and Ac-HisValGlyAsp-NH2 related to the active site of the enzyme CuZnSOD were studied by potentiometric and spectroscopic (UV-Vis, CD and EPR) techniques. The results reveal that both ligands have effective metal binding sites, but the tripeptide is a ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2003.09.012
更新日期：2004-01-01 00:00:00
abstract：:We have used low-temperature (77K) resonance Raman (RR) spectroscopy as a probe of the electronic and molecular structure to investigate weak pi-pi interactions between the metal ion-coordinated His imidazoles and aromatic side chains in the second coordination sphere of blue copper proteins. For this purpose, the RR ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2009.11.004
更新日期：2010-03-01 00:00:00
abstract：:It was previously shown that complexation of 67Cu with His facilitates 67Cu uptake by hypothalamic slices and that His, in a concentration that is 1000-fold greater than Cu(His)2, inhibits 67Cu uptake (D. E. Hartter and A. Barnea, J. Biol. Chem. 263, 799-805 (1988)). We addressed the question: Does dissociation of the...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(90)80041-u
更新日期：1990-09-01 00:00:00
abstract：:The metallodrug chloridotetrakis(ibuprofenato)diruthenium(II,III) ([Ru2(Ibp)4Cl] or RuIbpCl (1), Ibp=carboxylate anion derived from the non-steroidal anti-inflammatory drug ibuprofen) has shown promising results in vitro and in vivo, which point to its potential as an inhibitor of glioma tumour growth in vivo. In orde...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2016.10.003
更新日期：2016-12-01 00:00:00
abstract：:A series of platinum(II) complexes with 2,9-disubstituted-6-benzylaminopurines has been prepared. The complexes have the following composition: cis-[Pt(Boh)(2)Cl(2)] (1), cis-[Pt(Oc)(2)Cl(2)] (2), cis-[Pt(Ros)(2)Cl(2)] (3), cis-[Pt(i-PrOc)(2)Cl(2)] (4), cis-[Pt(BohH(+))(2)Cl(2)]Cl(2) (5), cis-[Pt(OcH(+))(2)Cl(2)]Cl(2)...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2005.07.009
更新日期：2005-11-01 00:00:00
abstract：:The Ce(IV)-mitoxantrone complex exhibits a higher lethality to Ehrlich ascites tumor cells than that of the free drug and shows stronger inhibition ability on the DNA synthesis of the tumor cells. Thus the Ce(IV)-mitoxantrone complex may become a more potent antitumor drug than mitoxantrone. The different interaction ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(97)00030-5
更新日期：1997-11-01 00:00:00
abstract：:Two ruthenium(II) complexes (Ru-complexes) were synthesized and characterized in this study. The selectivity and ability of the complexes to interact with bcl-2 DNA were investigated here. It turned out that [Ru(ip)3](ClO4)2·2H2O (complex 1, ip = 1H-iminazole [4,5-f][1,10] phenanthroline) could induce and stabilize th...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2013.12.005
更新日期：2014-05-01 00:00:00
abstract：:Escherichia coli ZraP (zinc resistance associated protein) is the major Zn containing soluble protein under Zn stress conditions. ZraP is the accessory protein of a bacterial two-component, Zn2+ sensitive signal transduction system ZraSR. ZraP has also been reported to act as a Zn2+ dependent molecular chaperone. An e...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2018.12.013
更新日期：2019-03-01 00:00:00
abstract：:Aluminum, the most abundant neurotoxic metal in our biosphere, has been implicated in the etiology of several neurodegenerative disorders including Alzheimer's disease (AD). To further understand aluminum's influence on gene expression, we examined total messenger RNA levels in untransformed human neural cells exposed...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2005.04.021
更新日期：2005-09-01 00:00:00
abstract：:We have studied the ground state of a realistic model of oxyheme with multiconfigurational second-order perturbation theory (CASPT2). Our results show that the ground-state electronic structure is strongly multiconfigurational in character. Thus, the wavefunction is a mixture of many different configurations, of which...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2004.11.008
更新日期：2005-01-01 00:00:00
abstract：:The use of chelating agents for iron and aluminum in different clinical applications has found increasing attention in the last thirty years. Desferal, deferiprone and deferasirox, chelating agents nowadays in use, are based on hydroxamic groups, hydroxyl-substituted pyridinones or aromatic ring systems. With the aim ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2013.06.009
更新日期：2013-10-01 00:00:00
abstract：:The synthesis and characterization of four palladium(II) complexes with substituted salicylaldehydes (X-saloH) having the general formula [Pd(X-salo)2] was undertaken. The complexes are formulated as [Pd(3-OCH3-salo)2] 1, [Pd(5-NO2-salo)2] 2, [Pd(5-Cl-salo)2] 3, and [Pd(5-Br-salo)2] 4. The structure of complex 1 was v...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2019.02.013
更新日期：2019-05-01 00:00:00
abstract：:The inhibitory effect of Cu2+, Mn2+, Co2+, and I- on naproxen-induced photohemolysis was investigated. In order to better understand this effect, these ions were also tested for lipid peroxidation and protein crosslinking, which are among the main processes involved in erythrocyte membrane damage. The overall results ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(95)00226-x
更新日期：1996-09-01 00:00:00
abstract：:A binuclear complex [(phen)Cu(mu-bipp)Cu(phen)](ClO(4))(4), where phen=1,10-phenanthroline and bipp=2,9-bis(2-imidazo[4,5-f][1,10]phenanthroline)-1,10-phenanthroline, has been synthesized and its interaction with calf-thymus DNA in the buffer containing 5mM Tris and 50mM NaCl has been studied by means of electronic ab...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2005.08.002
更新日期：2005-11-01 00:00:00
abstract：:Partially purified selenoprotein P from rat plasma was digested with either trypsin, endoprotease Lys-C, or endoprotease Arg-C and analyzed by high pressure liquid chromatography and sodium dodecyl sulfate polyacrylamide gel electrophoresis. Several 75Se-labeled peptides were detected. The moles of selenium in selenop...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(90)80060-b
更新日期：1990-11-01 00:00:00
abstract：:The rational design of anticancer agents that acts in specific biological targets is one of the most effective strategies for developing chemotherapeutic agents. Aiming at obtaining new ruthenium (II) compounds with good cytotoxicity against tumor cells, a series of new complexes of general formula [RuCl(PPh3)(Hdpa)(N...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2019.01.006
更新日期：2019-04-01 00:00:00
abstract：:Aluminium chemistry has features in common with two other groups of elements: (1) divalent magnesium and calcium, and (2) trivalent chromium and iron. The essential differences between the first group and aluminium are explored and it is shown that the much higher acidity of aluminium makes it such a powerful competit...
journal_title：Journal of inorganic biochemistry
pub_type：
doi：10.1016/s0162-0134(99)00118-x
更新日期：1999-08-30 00:00:00
abstract：:Amino acid replacement is a useful strategy to assess the roles of axial heme ligands in the function of native heme proteins. THB1, the protein product of the Chlamydomonas reinhardtii THB1 gene, is a group 1 truncated hemoglobin that uses a lysine residue in the E helix (Lys53, at position E10 by reference to myoglo...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2019.110824
更新日期：2019-12-01 00:00:00
abstract：:The syntheses, characteristics of dinuclear macrocyclic polyamine zinc complexes and their interaction with plasmid DNA are reported. The two cyclen (1,4,7,10-tetraazacyclododecane) moieties are bridged by rigid and flexible linkages. The crystal structures of Zn2C27H43N8O15Cl4 [5c.(ClO4)3.2H2O] and Zn2C30H43N10O13Cl3...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2005.05.008
更新日期：2005-08-01 00:00:00
abstract：:Maintenance of cellular iron homeostasis demands the coordination of iron uptake, intracellular storage, and utilization. Recent investigations suggest that a single genetic regulatory system orchestrates the expression of proteins with central importance for all three aspects of cellular iron metabolism at the level ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章,评审
doi：10.1016/0162-0134(92)84064-t
更新日期：1992-08-15 00:00:00
abstract：:Fourteen new complexes were obtained from Ln(III)(NO3)3∙n-H2O and the chromophores 2-(1H-benzo[d]imidazol-2-yl)-phenol (Bzp1) or 2-(5-methyl-1H-benzo[d]imidazol-2-yl)-phenol (Bzp2). The complete characterization allowed us to assign unequivocally the structures of all the complexes. The techniques used for this purpos...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2019.110842
更新日期：2019-12-01 00:00:00
abstract：:The plasmid DNA scission by the restriction enzyme HaeIII was investigated in the presence of tetrakis(1-methylpyridinium-4-yl)porphyrin (H2TMPyP) and its manganese(III), iron(III), nickel(II), cobalt(III) and zinc(II) derivatives. The effect of metalloporphyrins on plasmid DNA cleavage was ascertained by gel electrop...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(00)00067-2
更新日期：2000-03-01 00:00:00
abstract：:Intracellular binding of cisplatin to non-DNA partners, such as proteins, has received increasing attention as an additional mode of action and as mechanism of resistance. We investigated two cisplatin-interacting isoforms of protein disulfide isomerase regarding their contribution to acquired cisplatin resistance usi...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2015.08.028
更新日期：2015-12-01 00:00:00
abstract：:The reaction mechanism of the oxidation of 2,6-dichlorophenol (2,6-DCP) by horseradish peroxidase (HRP) and H2O2 has been investigated and the reaction products have been characterized by UV-visible and mass spectrometry. Evidence for the dimerization of 2,6-DCP to 3,3',5,5'-tetrachloro-4,4'-dihydroxybiphenyl and the ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(02)00488-9
更新日期：2002-09-30 00:00:00
abstract：:Complexes of cadmium(II) derivatives with adenine from water or by simulation of physiological conditions are obtained. The complexes have been studied by spectroscopic, conductometric, 1H-NMR, and by TG and DSC measurements. Possible coordination modes of the ligand are proposed. ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(87)80023-5
更新日期：1987-02-01 00:00:00
