Abstract:
:The N-terminal protected and unprotected peptides MAHHEEQHG-NH(2), Ac-MAHHEEQHG-NH(2) from Hpn (Helicobacter histidine-rich protein) and MAHHEQQQQQQA-NH(2), Ac-MAHHEQQQQQQA-NH(2) from Hpn-like protein, respectively, were synthesized and their interactions with Cu(2+) and Ni(2+) ions were studied by potentiometric, UV-visible, CD, and EPR techniques. The studies have shown that because of their albumin-like sequence, unprotected peptides are very effective chelating agents for both studied metals. The presence of the hexa-glutamine sequence has very distinct impact on the stability of the complexes formed even if direct interactions with metal ions were not found. The much more effective Ni(2+) binding by Hpn-like N-terminal domain when compared to Hpn protein could be critical for different biological functions played by both proteins.
journal_name
J Inorg Biochemjournal_title
Journal of inorganic biochemistryauthors
Witkowska D,Bielinska S,Kamysz W,Kozlowski Hdoi
10.1016/j.jinorgbio.2010.11.004subject
Has Abstractpub_date
2011-02-01 00:00:00pages
208-14issue
2eissn
0162-0134issn
1873-3344pii
S0162-0134(10)00249-7journal_volume
105pub_type
杂志文章abstract::Development of antibiotic resistance in bacteria causes major challenges for our society and has prompted a great need for new and alternative treatment methods for infection. One promising approach is to target bacterial virulence using for example salicylidene acylhydrazides (hydrazones). Hydrazones coordinate metal...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2016.04.010
更新日期:2016-07-01 00:00:00
abstract::This communication presents synthesis and spectral characterization of metalloporphyrin [Zn(X)TMPyP4] (TMPyP4 is 5,10,15,20-tetrakis (N-methylpyridinium-4-yl)porphyrin), and studies its binding onto anionic surface sites of synthetic double stranded polynucleotide Poly(A)-Poly(U). [Zn(X)TMPyP4] binding with Poly(A)-Po...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2016.05.004
更新日期:2016-08-01 00:00:00
abstract::The coordination modes of Cu(II) to alpha-casein (90-95) and alpha-casein (90-96) peptides with opioid activity isolated from pepsin hydrolisates of alpha-casein were investigated by means of electron paramagnetic resonance, absorption, and circular dichroism spectroscopy and potentiometry. The results allow the ident...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/s0162-0134(96)00147-x
更新日期:1997-04-01 00:00:00
abstract::Electrospray mass spectrometry (ESMS) of certain peptides labelled with (99m)Tc via hydrazinonicotinamide (HYNIC) with tricine as co-ligand shows one Tc-bound tricine, whereas typically two are observed. We speculated that this was due to coordination of a neighbouring histidine (His) or glutamate (Glu). To investigat...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2009.04.007
更新日期:2009-07-01 00:00:00
abstract::Reactivity of the dicopper(I) and dicopper(II) complexes supported by novel polyamine ligands L1 (1,11-bis(6-methylpyridin-2-yl)-2,6,10-triaza-2,6,10-tribenzylundecane) and L2 (5-benzyl-1,9-bis(6-methylpyridin-2-yl)-2,8-bis(6-methylpyridin-2-ylmethyl)-2,5,8-triazanonane) towards O(2) and H(2)O(2), respectively, has be...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2003.11.009
更新日期:2004-05-01 00:00:00
abstract::The phosphane Cu(I) complex [Cu(thp)4][PF6], 1 (thp=tris(hydroxymethyl)phosphane) shows notable in vitro antitumour activity against a wide range of solid tumours. Uptake experiments performed in 1-treated colon cancer cells by atomic absorption spectrometry, reveal that the antiproliferative activity is consistent wi...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2016.07.007
更新日期:2016-12-01 00:00:00
abstract::As two quite complicated substances, arsenic (As) and copper (Cu) have polluted to the environment. As is highly toxic and could cause nerve damage. Cu is involved in the occurrence of oxidative stress. The brain is one of the main target organs of heavy metal toxicity, but the damage mechanism activated by As and/or ...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2020.111201
更新日期:2020-10-01 00:00:00
abstract::Catalytic mechanisms of reduction of O(2) to 2H(2)O by respiratory terminal oxidases have been extensively investigated. Tri-heme (b(558), b(595), d) cytochrome bd oxidases presumably utilize a dihemic site composed of high-spin hemes d and b(595). We performed a CO photolysis/recombination study of the purified fully...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2012.09.016
更新日期:2013-01-01 00:00:00
abstract::To construct the model of metallohydrolase, two inclusion complexes [MLCl2(β-CD)] (1, M=Zn(II); 2, M=Cu(II); L=N,N'-bis(2-pyridylmethyl)amantadine; β-CD=β-cyclodextrin) were synthesized by mixing β-CDs with the pre-synthesized complexes G1, [ZnLCl2] and G2, [CuLCl2]. Structures of G1, G2, 1 and 2 were characterized by...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2016.07.011
更新日期:2016-10-01 00:00:00
abstract::The synthesis, physico-chemical characterization and cytotoxicity against five human tumoral cell lines (THP-1, U937, Molt-4, Colo205 and H460) of three new cobalt(II) coordination compounds are reported (i.e. Co(HL1)Cl (1), Co(HL2)Cl (2) and [Co(HL3)Cl]0.0.5 (CH3)2CHOH (3)). H2L2 (2-{[[2-hydroxy-3-(1-naphthyloxy)prop...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2016.05.003
更新日期:2016-08-01 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::HtaA is a heme-binding protein that is part of the heme uptake system in Corynebacterium diphtheriae. HtaA contains two conserved regions (CR1 and CR2). It has been previously reported that both domains can bind heme; the CR2 domain binds hemoglobin more strongly than the CR1 domain. In this study, we report the bioph...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2016.11.027
更新日期:2017-02-01 00:00:00
abstract::The redox active iron-sulfur center of bovine adrenodoxin is coordinated by four cysteine residues in positions 46, 52, 55 and 92 and is covered by a loop containing the residues Glu-47, Gly-48, Thr-49, Leu-50 and Ala-51. In plant-type [2Fe-2S] ferredoxins, the corresponding loop consists of only four amino acids. The...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/s0162-0134(02)00463-4
更新日期:2002-09-20 00:00:00
abstract::We investigated the effect on cell death of reactive oxygen species induced by water-soluble cationic metalloporphyrins with superoxide dismutase (SOD) activity. The SOD activity of 5,10,15,20-tetrakis(4-N-methylpyridyl)]porphine (MPy(4)P) containing Fe, Mn or Cu was measured using a cytochrome c assay by the xanthine...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/s0162-0134(01)00187-8
更新日期:2001-06-01 00:00:00
abstract::The 134 amino acid DNase domain of colicin E9 contains a zinc-finger-like HNH motif that binds divalent transition metal ions. We have used 1D 1H and 2D 1H-15N NMR methods to characterise the binding of Co2+, Ni2+ and Zn2+ to this protein. Data for the Co2+-substituted and Ni2+-substituted proteins show that the metal...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/s0162-0134(99)00235-4
更新日期:2000-04-01 00:00:00
abstract::Studies of complexation equilibria of the antibiotic anions nalidixate and cinoxacinate with [Cu(phen)]2+ and [Cu(bipy)]2+ are reported. These studies indicate that the stability of this type of complex is strongly related to the metal environment. A correlation between the stability constants, determined here, with t...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/0162-0134(96)00041-4
更新日期:1996-11-15 00:00:00
abstract::Rat kidney selenium (Se)-containing proteins were studied by isotopic labeling with [75Se]selenite or [75Se]selenomethionine via three routes: oral, intraperitoneal injection, and incubation of kidney slices with the isotope. The two major Se-containing proteins in kidney were fractionated and partially characterized....
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/0162-0134(88)80005-9
更新日期:1988-08-01 00:00:00
abstract::A photostable Ru(2,2-biquinoline)2(3-(2-pyridyl)-5-(4-carboxyphenyl)-1,2,4-triazolate) (Ru(biq)2(trzbenzCOOH)) complex that exhibits near-infrared (NIR) emission centred at 786 nm is reported. The parent complex was conjugated via amide coupling to a cell-penetrating peptide sequence octa-arginine (R8), and two signal...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2020.111032
更新日期:2020-06-01 00:00:00
abstract::Methanobactins are copper-binding ligands produced by aerobic methanotrophic microorganisms. A quantitative understanding of their potential role in methanotrophic copper acquisition requires the investigation of their copper complexes under relevant pH conditions. In this study, a chemical speciation model describing...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2012.07.008
更新日期:2012-11-01 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::The new cyclic tetrapeptide c(HGHK) was synthesised in the solid phase and its complexes with copper(II) were studied in aqueous solution at various pH values by means of potentiometric and spectroscopic methods (UV, EPR, CD). Six mononuclear coordination species were clearly identified within the pH range 3-11. Spect...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2004.09.007
更新日期:2004-12-01 00:00:00
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::Cancer-Associated Fibroblasts (CAFs) contribute to tumour progression and have received significant attention as a therapeutic target. These cells produce growth factors, cytokines and chemokines, stimulating cancer cell proliferation and inhibiting their apoptosis. Recent advances in drug delivery have demonstrated a...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2020.111017
更新日期:2020-05-01 00:00:00
abstract::Polyamines are ubiquitous polycations that participate in cellular processes such as growth, differentiation and cell death. Among the different functions ascribed to these organic cations, the polyamine spermine is known to protect DNA from the damage produced by reactive oxygen species (ROS) generated by different a...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2005.07.005
更新日期:2005-10-01 00:00:00
abstract::Metallodrugs have become an integral part of modern medicinal chemistry with platinum drugs as anti-cancer agents being well-known examples. The historically interesting compound Zeise's salt, potassium trichlorido(ethene)platinate(II) has scarcely been investigated in this context yet. This study is geared towards sh...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2018.09.003
更新日期:2018-12-01 00:00:00
abstract::The ability of antitumor active metallocenes Cp2MCl2, (M=Ti, V, Mo, Nb) and the biologically inactive derivative (MeCp)2TiCl2, to inhibit the relaxation of supercoiled plasmid DNA pBR322 by human topoisomerase II has been studied by gel electrophoresis. All metallocenes inhibit the enzyme with maximum inhibition obser...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/s0162-0134(00)00198-7
更新日期:2001-01-15 00:00:00
abstract::(Cu(CM)A)B(C6H5)4 and Cu(CM)A(OH) X H2O (CM = cimetidine and HA = L-alanine) were prepared and characterized by elemental analysis, TG-DTA, IR, and electronic spectral data and magnetic susceptibility measurements. The EPR spectrum of (Cu(CM)A)B(C6H5)4 shows a distorted octahedral environment for the Cu(II) ion. ...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/0162-0134(87)80019-3
更新日期:1987-02-01 00:00:00
abstract::The study of interactions between proteins and nanoparticles is important to advancing applications of nanoparticles in biology, medicine, and materials science. Here, we report the encapsulation of a 5-nm diameter gold nanoparticle (AuNP) by thermophilic ferritin (tF), achieved in nearly quantitative yield under mild...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/j.jinorgbio.2013.10.003
更新日期:2014-01-01 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 discovery of new metal-selective complexing agents may be facilitated by applying an in vitro selection strategy. Such a strategy was recently devised to identify and enrich populations of bacteriophage that rely on Mg(II)-, Zn(II)-, or Au(III)-selective stabilization for survival in the presence of denaturing ure...
journal_title:Journal of inorganic biochemistry
pub_type: 杂志文章
doi:10.1016/0162-0134(96)85609-1
更新日期:1996-07-01 00:00:00