Abstract：
:The bacterial cytochrome c peroxidases contain an electron-transferring haem c (E) and a peroxidatic haem c (P). Many are isolated in an inactive oxidised state. Reduction of the E haem promotes Ca(2+)-dependent spin state and coordination changes at the P haem rendering it accessible to ligand. Recent crystallographic work on the oxidised and mixed valence enzymes has suggested a mechanism by which an electron entering the E haem remotely triggers this activation of the P haem. Binding of hydrogen peroxide at the activated P haem leads to an intermediate catalytic form containing two oxidising equivalents, one of which is a ferryl oxene. This form of the enzyme is then reduced by two single electron transfers to the E haem delivered by small redox proteins such as cytochromes or cupredoxins. The binding of these small redox proteins is dominated by global electrostatic forces but the interfaces of the electron transfer complexes that are formed are largely hydrophobic and relatively non-specific. These features allow very high electron transfer rates in the steady state.
journal_name
J Inorg Biochemjournal_title
Journal of inorganic biochemistryauthors
Pettigrew GW,Echalier A,Pauleta SRdoi
10.1016/j.jinorgbio.2005.12.008subject
Has Abstractpub_date
2006-04-01 00:00:00pages
551-67issue
4eissn
0162-0134issn
1873-3344pii
S0162-0134(05)00367-3journal_volume
100pub_type
杂志文章,评审abstract：:The CuA center is a dinuclear Cu2S2(Cys) electron transfer center found in cytochrome c oxidase and nitrous oxide reductase. In a previous investigation of the equatorial histidine ligands' effect on the reduction potential, electron transfer and spectroscopic properties of the CuA center, His120 in the engineered CuA...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(99)00214-7
更新日期：2000-01-15 00:00:00
abstract：:Protein tyrosine nitration, protein oxidation and lipid peroxidation are nitrative/oxidative modification of protein and lipids. In this paper, a BSA (bovine serum albumin)-lecithin liposome system was used to study the nature of different forms of iron, including methemoglobin, hemin and ferric citrate, in catalyzing...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2009.01.020
更新日期：2009-05-01 00:00:00
abstract：:The reactions of Fe(II)EDTA, Fe(II)DTPA, and Fe(II)HEDTA with hydrogen peroxide near neutral pH have been investigated. All these reactions have been assumed to proceed through an active intermediate, I1, (Formula: see text) where pac is one of the three polyaminocarboxylates mentioned above. I1, whether .OH radical o...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(87)80027-2
更新日期：1987-03-01 00:00:00
abstract：:Phosphate buffer suspensions of unilamellar liposomes of phosphatidylcholine were irradiated with UVC (254 nm) and UVB (300 nm) light. The irradiation provoked lipid peroxidation and liposome lysis with release of entrapped glucose-6-phosphate. At the same intensity of absorbed light, the photochemical effect at 254 n...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(94)00048-f
更新日期：1995-07-01 00:00:00
abstract：:DNA condensation induced by a pair of heptameric La(III) helical enantiomers M-[La7(S-L)6(CO3)(NO3)6(OCH3)(CH3OH)7]·2CH3OH·5H2O and P-[La7(R-L)6(CO3)(NO3)6(OCH3)(CH3OH)5(H2O)2]·2CH3OH·4H2O (M-La and P-La, L=2-(2-hydroxybenzylamino)-3-carbamoylpropanoic acid) has been investigated by UV/vis spectroscopy, fluorescence s...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2014.05.001
更新日期：2014-09-01 00:00:00
abstract：:Recent studies of the reaction mechanism of the molybdenum-containing enzyme xanthine oxidase are presented. The pH-dependence of both the steady-state and rapid reaction kinetics of the enzyme exhibits is bell-shaped, with pK(a)s for the acid and alkaline limbs of 6.6 and 7.4, respectively. These are assigned to ioni...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2003.11.010
更新日期：2004-05-01 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：:Folic acid is degraded by cytochrome c in the presence of hydrogen peroxide/tert-butyl hydroperoxide at the C9-N10 bond. The degradation is increased with increasing temperature. When guanidine HCl or benzoate are included in the reaction medium, the amount of folic acid degradation is enhanced. Catalase, formate, and...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(87)80058-2
更新日期：1987-10-01 00:00:00
abstract：:The putative platinum(IV) anticancer drugs, [Pt{((R)NCH(2))(2)}(py)(2)XY] (X,Y=Cl, R=p-HC(6)F(4) (1a), C(6)F(5) (1b); X,Y=OH, R=p-HC(6)F(4) (2); X=Cl, Y=OH, R=p-HC(6)F(4) (3), py = pyridine) have been prepared by oxidation of the Pt(II) anticancer drugs [Pt{((R)NCH(2))(2)}(py)(2)] (R=p-HC(6)F(4) (4a) or C(6)F(5) (4b))...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2012.07.016
更新日期：2012-10-01 00:00:00
abstract：:The non-covalent interaction of the complexes [Pt(bpy)(R,R'NCSNR'',R''')(2)]Cl(2) (bpy=2,2'-bipyridine; R=R'=R''=R'''=H; R=Me, R'=R''=R'''=H; R=n-Bu, R'=R''=R'''=H; R=p-tolyl, R'=R''=R'''=H; R=Et, R'=H, R''=Et, R'''=H) with calf thymus DNA has been studied at pH 7 and 25 degrees C. The processes give rise to: (i) reve...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2004.11.002
更新日期：2005-02-01 00:00:00
abstract：:Three binuclear Ru(II) complexes with two [Ru(bpy)(2)(pip)](2+)-based subunits {where bpy=2,2'-bipyridine and pip=2-phenylimidazo[4,5-f][1,10]phenanthroline} being linked by varied lengths of flexible bridges, were synthesized and characterized by (1)H NMR, elemental analysis, UV-visible (UV-vis) and photoluminescence...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2010.12.004
更新日期：2011-03-01 00:00:00
abstract：:Electron spin resonance spin trapping was utilized to investigate free radical generation from cobalt (Co) mediated reactions using 5,5-dimethyl-1-pyrroline (DMPO) as a spin trap. A mixture of Co with water in the presence of DMPO generated 5,5-dimethylpyrroline-(2)-oxy(1) DMPOX, indicating the production of strong ox...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(98)10022-3
更新日期：1998-07-01 00:00:00
abstract：:Extended x-ray absorption fine structure (EXAFS) spectra have been recorded at the Cu edge and Zn edge in native yeast superoxide dismutase and at the Cu edge and Cd edge in the yeast superoxide dismutase derivative, where Zn has been substituted with Cd. Two different metal ligand distances in the range 1.9-2.0 A and...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(84)80027-6
更新日期：1984-11-01 00:00:00
abstract：:Five new heterocyclic gold carbene complexes were prepared, four chlorido-[1,3-dimethyl-4,5-diarylimidazol-2-ylidene]gold complexes 6a-d and a chlorido-[1,3-dibenzylimidazol-2-ylidene]gold complex 11, and three of them were characterised by X-ray single crystal analyses. They were tested for cytotoxicity against a pan...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2011.08.026
更新日期：2012-01-01 00:00:00
abstract：:Nickel-containing carbon monoxide dehydrogenases, acetyl-CoA synthases, nickel-iron hydrogenases, and diron hydrogenases are distinct metalloenzymes yet they share a number of important characteristics. All are O(2)-sensitive, with active-sites composed of iron and/or nickel ions coordinated primarily by sulfur ligand...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.jinorgbio.2011.08.012
更新日期：2012-01-01 00:00:00
abstract：:The zinc coordination sphere in prokaryotic zinc finger domain is extremely versatile and influences the stability and the folding property of the domain. Of a particular interest is the fourth zinc coordinating position, which is frequently occupied by two successive histidines, both able to coordinate the metal ion....
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2013.10.016
更新日期：2014-02-01 00:00:00
abstract：:Alpha-glucosidase is considered to be an important target for the treatment of noninsulin-dependent diabetes. In this work, the inhibitory effects of polyoxometalates (POMs) affected by three different factors (heteroatom, transition metal substitution element and vanadium substitution number) on α-glucosidase were st...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2019.110784
更新日期：2019-10-01 00:00:00
abstract：:Nanosized polyphosphazene-platinum (II) conjugates with a wide range of molecular weight from 24,000 to 115,000 were synthesized to study their tumor selectivity by enhanced permeability and retention (EPR) effect and their antitumor activity. It has been found from biodistribution study that the present polyphosphaze...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2005.04.019
更新日期：2005-08-01 00:00:00
abstract：:A series of new copper (II) complexes with 2-methyl-3-amino(3H)-quinazolin-4-one (MAQ) and various anions (Cl-, Br-, ClO(-)4, NO(-)3, SCN-, and SO(2-)4 was prepared. Their structures and properties were characterized by elemental analysis, IR, UV-Vis and ESR spectroscopy, molar conductivity, and magnetic moment measur...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(96)00122-5
更新日期：1997-02-15 00:00:00
abstract：:Positional isomers of mono-unsaturated 18:1-ACP have been used as substrates for stearoyl-acyl carrier protein delta9 desaturase to test whether a C-H bond abstraction from either the C-9 or C-10 position could lead to rearranged products diagnostic for the production of an allylic radical intermediate. The reconstitu...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(99)00199-3
更新日期：2000-01-15 00:00:00
abstract：:The action mechanism of vanadocene dichloride, Cp2VCl2 (Cp=eta5-C5H5), has been investigated by interaction with human serum transferrin for its promising antitumor activities. Our results have shown that Cp2VCl2 binds to transferrin and form a new complex, and the calculated apparent association constant is 1.37 x 10...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2007.07.030
更新日期：2008-01-01 00:00:00
abstract：:A zinc(II) complex having planar tridentate ligand, bzimpy, where bzimpy is 2,6-bis(benzimidazol-2-yl) pyridine was synthesized and characterized by UV, NMR, infrared spectroscopy and fluorescence spectra. The zinc complex acts as dibasic acids, in which N-H protons on benzimidazole moieties are responsible for a depr...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2004.12.018
更新日期：2005-03-01 00:00:00
abstract：:The antioxidant activity of flavonoids may involve their ability to complex body iron in non-redox-active forms. In this study, it was found that the catechol flavonoids rutin and quercetin are able to suppress redox-active labile plasma iron (LPI) in both buffered solution and in iron-overloaded sera. Both flavonoids...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2011.11.014
更新日期：2012-02-01 00:00:00
abstract：:The present investigation is designed to probe the influence of excess retinoic acid (50,000 I.U.) and Sn-protoporphyrin (50 mumol/kg bw) along with retinoic acid on the activity patterns of the rate-limiting enzyme, heme oxygenase, of the heme catabolic pathway in the liver, spleen, kidney, brain, heart, and lung of ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(96)00196-1
更新日期：1997-05-15 00:00:00
abstract：:The toxicity of inclusion compounds formed by carbon nanostructures depends on its functionalized surface, use of solvents, dosage and other properties. Molecular modeling has potentially contributed to the understanding of the chemical nature of the formation of these systems and allows advancement in studies of the ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2017.10.013
更新日期：2018-01-01 00:00:00
abstract：:The study of possible relationships between iron and vanadium metabolism (E. Sabbioni and E. Marafante, Proc. XIth Int. Conf. Biochem., 13-5-R122, Toronto, Canada) was extended to the vanadium in the biochemical mechanisms which involve the exchange of iron between transferrin and ferritin. The transfer of vanadium be...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(00)80271-8
更新日期：1980-07-01 00:00:00
abstract：:The prostate gland of humans and other animals accumulates a level of zinc that is 3-10 times greater than that found in other tissues. Associated with this ability to accumulate zinc is a rapid zinc uptake process in human prostate cells, which we previously identified as the hZIP1 zinc transporter. We now provide ad...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(03)00249-6
更新日期：2003-08-01 00:00:00
abstract：:Twenty ferritin samples were prepared at pH 6.5 with average loadings of 0-89 Fe atoms per molecule. Nuclear magnetic relaxation times T1 and T2 were measured at 3 degrees C, 23 degrees C, and at 37 degrees C and at field strength from 0.025 to 1.5 T. The field dependence, temperature dependence, and approximate equal...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(98)10047-8
更新日期：1998-09-01 00:00:00
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 ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(84)83007-x
更新日期：1984-07-01 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
