Abstract：
:Two macrocycles (1 and 2) are prepared that incorporate pendent groups in macrocycle 3 (3=1-oxa-4,7,10-triazacyclododecane) with the goal of studying the effect of these pendent groups on metal ion complexation, solution chemistry and catalysis. Zn(1) contains a macrocyclic ligand with a pendent acridine group and Zn(2) has an appended methyl group. Water ligand pK(a) values for Zn(1) (6.7) and Zn(2) (7.3) are lower than that of Zn(3) (7.7). Zn(II) complexes of 1 and 2 are studied as catalysts for the cleavage of 2-hydroxypropyl 4-nitrophenylphosphate (HpPNP), an RNA analog. Zn(2) has a lower catalytic activity over the pH range 7-10 for cleavage of HpPNP compared to the parent macrocyclic complex, Zn(3). In contrast, Zn(1) has a threefold larger rate constant at pH 7.0 compared to Zn(2), attributed to the presence of a catalytic species which has a protonated acridine amino group. The binding constant of 1.5mM at pH 8.0 for formation of the Zn(2)-uridine adduct is similar to that for Zn(3), suggesting that N-alkylation of the macrocyclic ligand does not interfere with binding of the Zn(II) complex to uridine groups. Binding of cytidine to Zn(2) was not detectable under similar conditions up to 25mM nucleoside. Binding experiments under similar conditions could not be carried out for adenosine or guanosine due to their low solubility.
journal_name
J Inorg Biochemjournal_title
Journal of inorganic biochemistryauthors
Rossiter CS,Mathews RA,Morrow JRdoi
10.1016/j.jinorgbio.2007.03.002subject
Has Abstractpub_date
2007-06-01 00:00:00pages
925-34issue
6eissn
0162-0134issn
1873-3344pii
S0162-0134(07)00048-7journal_volume
101pub_type
杂志文章abstract：:Four amino acids--alanine, 2,3-diaminopropionic acid, cystine, and cystein--and also one diamine, ethylenediamine, were chelated with 99m-technetium (99mTc), and their renal excretion patterns were studied in rabbits in the presence and absence of two renal tubular transport inhibitors, probenecid and 2,4-dinitropheno...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(88)85015-3
更新日期：1988-09-01 00:00:00
abstract：:Hydroxamate siderophores have been found to alleviate Al toxicity in bacteria. In Poaceae plants cyclic hydroxamates, like DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one) and its derivatives have mostly been studied in relation to either defence against insects or allelopathy. In this study the influence of Al o...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2005.05.017
更新日期：2005-09-01 00:00:00
abstract：:A series of new 3d metal complexes with 5-chloro-quinolin-8-ol (ClQ), [Mn(ClQ)2] (1), [Fe(ClQ)3] (2), [Co(ClQ)2(H2O)2] (3), [Ni(ClQ)2(H2O)2] (4), [Cu(ClQ)2] (5), [Zn(ClQ)2(H2O)2] (6), [Mn(ClQ)3]·DMF (7) and [Co(ClQ)3]·DMF·(EtOH)0.35 (8) (DMF=N,N-dimethylformamide), has been synthesized and characterized by elemental a...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2015.10.015
更新日期：2016-01-01 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：:In this work we report a series of Cu(II) complexes [Cu(N-N)2(X)]+, (N-N=substituted 1,10-phenanthroline derivatives and X=Cl- or NO3-), with tunable E1/2 for electrochemical reduction [CuII(N-N)2(X)]++1e-⇌[CuI(N-N)2]+X-. The disproportion of O2•- was explored in presence of the electro-generated species [CuI(N-N)2]+ ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2017.07.013
更新日期：2017-10-01 00:00:00
abstract：:Three biotinylated platinum(IV) complexes (1-3) were designed and synthesized. The resulting platinum(IV) complexes exhibited effective cytotoxicity against the tested cancer cell lines, especially complex 1, which was 2.0-9.6-fold more potent than cisplatin. These complexes were found to be rapidly reduced to their a...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2017.08.017
更新日期：2017-11-01 00:00:00
abstract：:Up-regulated expression of amyloid precursor protein (APP) occurs early in the cascade of events that leads to amyloid plaque formation in the human brain. APP gene up-regulation, mediated by activated NF-kappaB, is a response to stress from nM concentrations of aluminum ions, aluminum-disregulated iron ions, reactive...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2009.07.027
更新日期：2009-11-01 00:00:00
abstract：:Bioorganometallic ferrocene-dipeptide conjugates with the Ala-Pro-cysteamine chain, Fc-L-Ala-L-Pro-NHCH2CH2SH (2) and Fc-L-Ala-D-Pro-NHCH2CH2SH (4) (Fc=ferrocenoyl), were prepared by the reduction of the ferrocene-dipeptide conjugates, Fc-L-Ala-L-Pro-cystamine-L-Pro-L-Ala-Fc (1) or Fc-L-Ala-D-Pro-cystamine-D-Pro-L-Ala...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2017.05.009
更新日期：2017-12-01 00:00:00
abstract：:Previous studies of the interaction of the haem undecapeptide (MP-11) with lipidated human serum albumin in aqueous solution have been extended to a range of MeOH/H2O solution compositions. It is demonstrated that the kinetic mechanism for the interaction does not change from a simple second- and first-order reversibl...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(93)80009-x
更新日期：1993-04-01 00:00:00
abstract：:Parkinson's disease (PD) is a severe neurodegenerative disorder affecting movements. After Alzheimer's disease, it is the most common form of neurodegeneration. PD is characterized by the loss of neurons producing dopamine and by the presence of protein aggregates in the brain, known as Lewy bodies. The main constitue...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.jinorgbio.2016.04.012
更新日期：2016-10-01 00:00:00
abstract：:The gallium(III) complex of a new tripodal 3-hydroxy-4-pyridinone (3,4-HP) chelator has been studied in terms of its physico-chemical and in vivo properties aimed at potential application as probe for nuclear imaging. In particular, based on spectrophotometric titrations, the hexa-coordinated (1:1) gallium complex app...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2010.09.012
更新日期：2011-01-01 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：: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：: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
abstract：:Aqueous solutions of the four highest vanadium oxidation states exhibit four diverse colors, which only hint at the diverse reactions that these ions can undergo. Cationic vanadium ions form complexes with ligands; anionic vanadium ions form complexes with ligands and self-react to form isopolyanions. All vanadium spe...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.jinorgbio.2014.12.009
更新日期：2015-06-01 00:00:00
abstract：:Boosting the photosensitization type I process will enhance the phototherapy efficacy because the superoxide radicals (O2-) generated during type I process are more toxic than the singlet oxygen (1O2) in type II process. Herein, [Ru(Hdtza)(phen)2][PF6] (1) and [Ru(pytz)(phen)2][PF6] (2) (phen = 1,10-phenanthroline) ba...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2020.111236
更新日期：2020-11-01 00:00:00
abstract：:The interaction between cadmium and yeast hexokinase was studied. Cadmium produces changes in the aggregation state of the protein and large structures with a large molecular mass were formed. This phenomenon occurs without large modifications to the secondary structure. During this change the enzyme maintains a high ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(01)00367-1
更新日期：2002-04-10 00:00:00
abstract：:A simple methodology giving access to the metal-free corroles of trans-A2B type, 5,15-bis(pentafluorophenyl)-10-{3-[2-(pyridin-4-yl)vinyl]phenyl}corrole and 5,15-bis(pentafluorophenyl)-10-{4-[2-(pyridin-4-yl)vinyl]phenyl}corrole, and to the corresponding bipyridyl platinum(II) complexes is described. These new positio...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2015.08.016
更新日期：2015-12-01 00:00:00
abstract：:The propensity of a large number of metal ions to induce cooperative conformational or structural transitions in double-stranded poly d(G-C) was assessed by UV and CD spectrometry. This ability was seen to be an intrinsic property of most metal ions. The observed (metal ion)/(polydeoxynucleotide) mole ratio calculated...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(94)80011-1
更新日期：1994-05-15 00:00:00
abstract：:The non-covalent binding of [(en)Pt(mu-dpzm)2Pt(en)]4+ to segments of DNA containing only G and C bases has been studied to gain an understanding of the pre-covalent binding association of cationic polynuclear platinum(II) anti-cancer drugs at G/C sites. 1H-NMR and CD spectroscopy were used to study the binding of the...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(00)00206-3
更新日期：2001-03-01 00:00:00
abstract：:The complexation of uranium(VI) to variant functional groups of the highly phosphorylated protein phosvitin in aqueous solution was investigated by attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy. For the verification of the affinity of the actinyl ions to carboxyl and phosphate groups ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2010.03.004
更新日期：2010-07-01 00:00:00
abstract：:Industrial applications and environmental problems involving the aqueous chemistry of aluminium require an understanding of the speciation of this metal ion at a wide range of concentrations. The formation of polynuclear species is of special interest due to the complexity of the hydrolysis mechanisms and the diversit...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(01)00326-9
更新日期：2001-11-01 00:00:00
abstract：:The effect of pH on the X-band electron paramagnetic resonance (EPR) spectrum of ferrous nitrosylated human adult tetrameric hemoglobin (HbNO) as well as of ferrous nitrosylated monomeric alpha- and beta-chains has been investigated, at -163 degrees C. At pH 7.3, the X-band EPR spectrum of tetrameric HbNO and ferrous ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2005.01.009
更新日期：2005-05-01 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：:The peptide sequence PHSRN is the second cell binding site of the human fibronectin protein, a glycoprotein which plays a critical adhesive role during development, tissue repair and angiogenesis. The copper(II) complexes with the peptide fragment PHSRN were characterized by potentiometric and UV-visible, CD, EPR spec...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2012.04.002
更新日期：2012-08-01 00:00:00
abstract：:Three amphiphilic antimony(V)-phthalocyanines have been synthesized by treating [Sb(R(4)Pc)(OH)(2)](+) salts in concentrated H(2)SO(4) and isolated as zwitter ions, [Sb(R(4)Pc)(SO(4)H)(SO(4))], where R(4)Pc denotes tetra-substituted phthalocyaninate; R(4)Pc=pc (R=H), tbpc (R=(t)Bu), and tObpc (R=O(n)Bu). Their solubil...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2012.02.021
更新日期：2012-06-01 00:00:00
abstract：:Oxyhemoglobin is oxidized to methemoglobin by copper(II) in a two-stage reaction that results in conversion of Fe(II) to Fe(III) in heme of the beta subunits, but not the alpha subunits. Glutathione and other thiols, which are slowly oxidized by Cu(II), protect oxyhemoglobin from Cu(II)-induced oxidation. In the prese...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(93)80038-b
更新日期：1993-11-15 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 active site of [NiFe] hydrogenase is a binuclear metal complex composed of Fe and Ni atoms and is called the Ni-Fe site, where the Fe atom is known to be coordinated to three diatomic ligands. Two mass spectrometric techniques, pyrolysis-MS (pyrolysis-mass spectrometry) and TOF-SIMS (time-of-flight secondary ion m...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(00)00081-7
更新日期：2000-07-01 00:00:00
abstract：:The stoichiometry of dioxygen uptake of Co complexes with 4',5'-bis-(5-chloro-2-hydroxyphenylmethylideneimino)benzo-12-crown-4 (1a), 4',5'-bis(2-hydroxyphenylmethylideneimino)benzo-12-crown-4 (1b), 4',5'-bis-(5-methoxy-2-hydroxyphenylmethylideneimino)benzo-12-crown-4 (1c), 4',5'-bis-(5-chloro-2-hydroxyphenylmethyliden...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2006.03.004
更新日期：2006-08-01 00:00:00
