Abstract：
:We have studied the electron paramagnetic resonance (epr) spectra of complexes of apo-yeast enolase with 65Cu+2 in the presence and absence of substrate and magnesium ion. An unusual epr spectrum with large g parallel, large g and A rhombicity and very narrow line-widths (10 G) is seen for the first two 65Cu+2 bound in the presence of substrate 2-phosphoglycerate (2PGA). the epr parameters, consistent with rhombic and tetragonal distortion of an octahedral geometry of the coordination sphere of the Cu+2 are g = (2.123, 2.042, 2.405) and A = (2.58, 4.19, 12.0) mK. The high g parallel and absence of super-hyperfine splitting are strong evidence for absence of nitrogen ligands. In the presence of Mg+2 and 2PGA, the Cu+2-enolase solutions exhibit a complex epr spectrum reflecting exchange and dipolar interaction between the first two Cu+2 ions bound. The spectra of Cu+2 plus enolase in the presence and absence of Mg+2 without 2PGA are distinct but not unambiguous, each reflecting at least two inequivalent binding sites. In addition to providing information on the geometry and location of the divalent cation binding sites, the data show unequivocally that imidazole residues, previously found to have a role in catalysis, do not participate in Cu+2 binding. Although Cu+2 does not activate the enzyme, direct binding measurements show that Cu+2 competes stoichiometrically with the activating ion, Mg+2. A reinterpretation of earlier Mn+2 enolase studies is proposed to reconcile the Cu+2 and Mn+2 data.
journal_name
J Inorg Biochemjournal_title
Journal of inorganic biochemistryauthors
Dickinson LC,Rose SL,Westhead EWdoi
10.1016/s0162-0134(00)80255-xsubject
Has Abstractpub_date
1980-12-01 00:00:00pages
353-66issue
4eissn
0162-0134issn
1873-3344pii
S0162-0134(00)80255-Xjournal_volume
13pub_type
杂志文章abstract：:A whole-cell biohybrid catalyst where a (pentamethylcyclopentadienyl)rhodium(III) (Cp*Rh(III)) complex was covalently incorporated into the cavity of nitrobindin (NB), a β-barrel protein, was prepared on an E. coli cell surface to produce isoquinolines via C(sp2)-H bond activation. In this whole-cell biohybrid system,...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2020.111352
更新日期：2021-01-08 00:00:00
abstract：:Calcium functions as a secondary messenger within the cytosols of eukaryotes. This serves as a reference point to evaluate three related questions:Exploration of these three interrelated questions indicates the importance of more sensitive techniques and of a refined concept of information transfer and transduction. 1...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.jinorgbio.2008.09.006
更新日期：2009-01-01 00:00:00
abstract：:Raman spectra were acquired on ox femur samples treated with hydrazine to remove the organic components of bone. A large increase in the signal-noise ratio of the mineral spectrum resulted from the exposure of the mineral surface and the removal of fluorescent components of the organic matrix. The effect of hydrazine ...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(90)84002-7
更新日期：1990-07-01 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：:To further develop the biomimetic chemistry of [FeFe]- and [NiFe]-hydrogenases for catalytic proton reduction to hydrogen (H2), two serials of dinuclear diiron and trinuclear NiFe2 dithiolate complexes with chelating PCNCP ligands, namely, Fe2(μ-edt)(CO)4{κ2-(Ph2PCH2)2NR} (1a-1c) and Fe2(CO)6(μ3-S)2Ni{(Ph2PCH2)2NR} (2...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2020.111126
更新日期：2020-09-01 00:00:00
abstract：:A number of oxidovanadium(IV) complexes have been reported to display anticancer activity. A theranostic approach, based on the simultaneous observation of both the effect of oxidovanadium(IV) complexes on cell viability and the disclosure of their intracellular fate, is possible by using oxidovanadium(IV) complexes f...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2017.02.009
更新日期：2017-05-01 00:00:00
abstract：:The reaction of [Mn{SSi(OBu(t))3}2(MeOH)4] with imidazole and its two methyl substituted derivatives leads to different types of heteroleptic manganese(II) thiolate complexes. Reaction with 1-methylimidazole gives the silanethiolate devoid of methanol but with two nitrogen ligands and thus central MnN(2)S(2) core. The...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2006.11.023
更新日期：2007-04-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(99)00027-6
更新日期：1999-04-01 00:00:00
abstract：:Kinetic evidence for the role of divalent metal ions in the phosphotransferase activity of polidocanol-solubilized alkaline phosphatase from osseous plate is reported. Ethylenediamine tetreacetate, 1,10-phenanthrolin, and Chelex-100 were used to prepare metal-depleted alkaline phosphatase. Except for Chelex-100, eithe...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(96)00159-6
更新日期：1997-04-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2017.10.005
更新日期：2018-01-01 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 study of modified synthetic procedure of water soluble morin-5'-sulfonic acid sodium salt (NaMSA) involving less aggressive chemicals and carried out at mild conditions was described. The NaMSA salt is a convenient source of anionic morin-5'-sulfonic ligand (MSA) in ion exchange reactions. The coordination ability...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2014.09.005
更新日期：2014-12-01 00:00:00
abstract：:The entire polypeptide of hyperthermophilic Pyrococcus furiosus rubredoxin was synthesized in order to specifically probe structural determinants of protein thermostability. The uv-visible, circular dichroic, electron paramagnetic, and nuclear magnetic resonance spectra, and electrochemical properties, of the native a...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/s0162-0134(96)00079-7
更新日期：1997-01-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2008.06.012
更新日期：2008-10-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2006.08.018
更新日期：2007-01-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2016.06.031
更新日期：2016-10-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2007.09.007
更新日期：2008-02-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2005.12.007
更新日期：2006-03-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2007.06.024
更新日期：2007-10-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2015.02.003
更新日期：2015-05-01 00:00:00
abstract：:Searching for new prospective antitrypanosomal agents, three novel Ru(II)-cyclopentadienyl compounds, [Ru(η(5)-C5H5)(PPh3)L], with HL=bioactive 5-nitrofuryl containing thiosemicarbazones were synthesized and characterized in the solid state and in solution. The compounds were evaluated in vitro on the blood circulatin...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2015.06.018
更新日期：2015-12-01 00:00:00
abstract：:Copper based nanoparticles (Cu-based NPs) of different compositions and sizes have been hydrothermally synthesized by varying the reaction time in the presence of the biocompatible surfactants polyoxyethylene (20) sorbitan laurate (Tween 20) and polyethylene glycol 8000 (PEG 8000). Effective control of the above synth...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2013.12.009
更新日期：2014-04-01 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
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(92)84012-c
更新日期：1992-03-01 00:00:00
abstract：:The conformation of poly[d(T-G).d(C-A)] in aqueous solution (0.1 M NaClO4, 5 mM cacodylic acid buffer, pH 6.9) was studied by circular dichroism (CD) spectroscopy in the ultraviolet. The conformation of the polynucleotide, as reflected by its chiroptical signature, changes in a highly cooperative fashion in the presen...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(91)84066-i
更新日期：1991-07-01 00:00:00
abstract：:Copper(II) and nickel(II) complexes of the terminally protected nonapeptide Ac-SGAEGHHQK-NH2 modeling the metal binding sites of the (8-16) domain of amyloid-β have been studied by potentiometric, UV-vis, CD and ESR spectroscopic methods. The studies on the mutants containing only one of the histidyl residues (Ac-SGAE...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2015.06.020
更新日期：2015-10-01 00:00:00
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journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2015.04.016
更新日期：2015-09-01 00:00:00
abstract：:Cobalt(III) triarylcorroles containing 0-3 nitro groups on the para-position of the three meso-phenyl rings of the macrocycle were synthesized and characterized by electrochemistry, mass spectrometry, (UV-vis) and (1)H NMR spectroscopy. The examined compounds are represented as (NO2Ph)(n)Ph(3-n)CorCo(PPh3), where n va...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2013.12.014
更新日期：2014-07-01 00:00:00
abstract：:A Schiff base complex of chromium(III), transdiaqua[N,N'ethylenebis (salicylideneimine)chromium(III)]perchlorate, [Cr(salen)(OH(2))(2)](+), was found to have an inhibitory effect on the growth of Shigella dysenteriae. The chromium(III) complex was found to cure (remove) the invasive plasmid and thereby render the micr...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/j.jinorgbio.2003.11.012
更新日期：2004-02-01 00:00:00
abstract：:The ligand behavior of di-2-pyridylketone 2-aminobenzoylhydrazone (Hdpa), and phenyl(2-pyridyl)ketone 2-aminobenzoylhydrazone (Hdba) towards organotin derivatives was investigated. The synthesis and the IR and 119Sn NMR spectroscopic characterization of the compounds is reported, together with the X-ray crystal struct...
journal_title：Journal of inorganic biochemistry
pub_type： 杂志文章
doi：10.1016/0162-0134(95)00005-9
更新日期：1995-11-01 00:00:00
