Characterization of polyion counterion interactions in cartilage by 23Na NMR relaxation.

Abstract:

:Nuclear quadrupole relaxation is a sensitive measure of electrolyte environments. We used the relaxation of 23Na to probe mobile ion-matrix interactions and the electrostatic structure of the polyelectrolyte extracellular matrix of cartilage. Specifically, we measured spin-lattice and spin-spin relaxation times of 23Na in bovine nasal cartilage at 132 MHz under several conditions. Matrix fixed charge density was reduced by protonating anionic sites and by matrix digestion with trypsin and the relaxation times compared to controls. Under all conditions studied, measured longitudinal relaxation was monoexponential with values ranging from 16-32 msec. Transverse relaxation exhibited biexponential behavior in all cartilage samples with a fast component in the range of 2 to 5 ms and a slow component between 16 and 53 ms. Reduction in matrix fixed charge density in all cases led to a decrease in the relaxation rates. The results suggest a two-site model for Na+ ions in cartilage and a relaxation mechanism involving both polyion segmental motion and counterion diffusion. In the context of ion condensation theory, the implication of a two-site model is that the mean polyion-polyion spacing may be less than 0.7 nm. The mean polyion-counterion spacings were estimated by calculating correlation times and quadrupole coupling constants. These spacings were found to be 0.5-0.7 nm.

journal_name

J Biomol Struct Dyn

authors

Dai H,McFarland EW

doi

10.1080/07391102.1996.10508898

subject

Has Abstract

pub_date

1996-04-01 00:00:00

pages

873-83

issue

5

eissn

0739-1102

issn

1538-0254

journal_volume

13

pub_type

杂志文章
  • Biophysical studies of mutated K562 DNA (erythroleukemic cells) binding to adriamycin and daunomycin reveal that mutations induce structural changes influencing binding behavior.

    abstract::K562 cells are erythroleukemic cells derived from a chronic myeloid leukemia patient in blast crisis. Comparison of the genome from K562 cells and normal human genome has been very useful strategy, in uncovering eight genes, implicated in acute myeloid leukemia (AML). These genes carry mutations in K562 genome and the...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2012.698190

    authors: Ghosh D,Saha C,Hossain M,Dey SK,Kumar GS

    更新日期:2013-03-01 00:00:00

  • Insights into the structural perturbations of spliced variants of CD44: a modeling and simulation approach.

    abstract::Transient interactions between cancer stem cells and components of the tumor microenvironment initiate various signaling pathways crucial for carcinogenesis. Predominant hyaluronan (HA) receptor, CD44 is structurally and functionally one of the most variable cell surface receptors having the potential to generate a di...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2016.1142476

    authors: Patel S,Shaikh F,Devaraji V,Radadiya A,Shah K,Shah A,Rawal R

    更新日期:2017-02-01 00:00:00

  • Atomic-scale modeling of the effect of lipid peroxidation on the permeability of reactive species.

    abstract::Biomembranes and lipid systems are rich in unsaturated lipid components and are subject to photo-induced lipid peroxidation. The peroxidized lipid products in cellular systems are known to affect the structural organization and function of the biomembrane. We employed molecular dynamics simulations to study the effect...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1730971

    authors: Kumar S,Rana R,Yadav DK

    更新日期:2020-03-05 00:00:00

  • DNA bending and sugar switching.

    abstract::Abstract Using high frequency antiphase NMR spectroscopy and computer simulations of the antiphase spectra, we studied the equlibria in the sugar conformations in the DNA duplex 11-mer containing the AAA tract surrounded by cytosines. We demonstrate that at the 3'-end of the A-tract, the sugar switches from the comm...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2000.10506637

    authors: Kamath S,Sarma MH,Zhurkin VB,Turner CJ,Sarma RH

    更新日期:2000-01-01 00:00:00

  • A comparative spectroscopic and calorimetric investigation of the interaction of amsacrine with heme proteins, hemoglobin and myoglobin.

    abstract::The binding of the anilido aminoacridine derivative amsacrine with the heme proteins, hemoglobin, and myoglobin, was characterized by various spectroscopic and calorimetric methods. The binding affinity to hemoglobin was (1.21 ± .05) × 105 M-1, while that to myoglobin was three times higher (3.59 ± .15) × 105 M-1. The...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2016.1176958

    authors: Bhowmik D,Suresh Kumar G

    更新日期:2017-05-01 00:00:00

  • Molecular modeling study of the norfloxacin-DNA complex.

    abstract::Molecular modeling and molecular dynamics were performed to investigate the interaction of norfloxacin with the DNA oligonucleotide 5'-d(ATACGTAT)(2). Eight quinolone-DNA binding structures were built by molecular modeling on the basis of experimental results. A 100ps molecular dynamics calculation was carried out on ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2002.10506811

    authors: Lee HM,Kim JK,Kim SK

    更新日期:2002-06-01 00:00:00

  • Critical effects on binding of epidermal growth factor produced by amino acid substitutions.

    abstract::Epidermal growth factor (EGF) plays important roles in multiple biological processes, such as the regulation of cell growth, proliferation, and differentiation. EGF exerts their pharmacologic effects via receptor-mediated mechanism associated with high affinity to epidermal growth factor receptor (EGFR) on the cell su...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2016.1171799

    authors: Mehrabi M,Khodarahmi R,Shahlaei M

    更新日期:2017-04-01 00:00:00

  • Globularity and protein function.

    abstract::Abstract The forces that direct protein folding lead naturally to native proteins and protein domains that are typically, to a first approximation, globular-spherical and compact, with a relatively clear distinction between the hydrophobic inside and polar outside. The near-universality of these features of protein ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2000.10506607

    authors: Carey J

    更新日期:2000-01-01 00:00:00

  • Design, synthesis, biological evaluation and molecular dynamics simulation studies of (R)-5-methylthiazolidin-4-One derivatives as megakaryocyte protein tyrosine phosphatase 2 (PTP-MEG2) inhibitors for the treatment of type 2 diabetes.

    abstract::PTP-MEG2 plays a significant role in insulin production and is able to enhance insulin signaling and improve insulin sensitivity. So, PTP-MEG2 inhibitors are closely associated with type 2 diabetes therapy. A series of novel (R)-5-methylthiazolidin-4-one derivatives were designed and synthesized, and their PTP-MEG2 in...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2019.1654410

    authors: Wu J,Sun Y,Zhou H,Ma Y,Wang R

    更新日期:2020-07-01 00:00:00

  • Screening of phytochemicals as potent inhibitor of 3-chymotrypsin and papain-like proteases of SARS-CoV2: an in silico approach to combat COVID-19.

    abstract::COVID-19 and its causative organism SARS-CoV2 that emerged from Wuhan city, China have paralyzed the world. With no clinically approved drugs, the global health system is struggling to find an effective treatment measure. At this crucial juncture, screening of plant-derived compounds may be an effective strategy to co...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1835729

    authors: Swargiary A,Mahmud S,Saleh MA

    更新日期:2020-10-22 00:00:00

  • In silico studies on p21-activated kinase 4 inhibitors: comprehensive application of 3D-QSAR analysis, molecular docking, molecular dynamics simulations, and MM-GBSA calculation.

    abstract::P21-activated kinase 4 (PAK4) is a serine/threonine protein kinase, which is associated with many cancer diseases, and thus being considered as a potential drug target. In this study, three-dimensional quantitative structure-activity relationship (3D-QSAR), molecular docking and molecular dynamics (MD) simulations wer...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2019.1673823

    authors: Gao Y,Wang H,Wang J,Cheng M

    更新日期:2020-09-01 00:00:00

  • New insight into the molecular mechanism of the trehalose effect on urate oxidase stability.

    abstract::Urate oxidase (EC 1.7.3.3) is a key enzyme in the purine metabolism which is applied in the treatment of gout and also, as a diagnostic reagent for uric acid detection. In the current study, the trehalose (TRE) effects as an additive on the structural stability and function of uricase were investigated. For recombinan...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1828167

    authors: Taherimehr Z,Zaboli M,Torkzadeh-Mahani M

    更新日期:2020-10-01 00:00:00

  • Contribution of protein conformation to heme stereochemistry and reactivity. Low-temperature magnetic circular dichroism data.

    abstract::Visible and near infrared magnetic circular dichroism (MCD) spectra of heme proteins and enzymes as well as those of a protein-free heme bound to 2-methylimidazole were recorded and compared at 4.2 K in unrelaxed metastable and relaxed equilibrium heme stereochemistry. The relaxed and unrelaxed stereochemistries of a ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.1989.10507761

    authors: Sharonov YuA,Pismensky VF,Yarmola EG

    更新日期:1989-08-01 00:00:00

  • PFG-NMR investigations of the binding of cationic neuropeptides to anionic and zwitterionic micelles.

    abstract::The mechanism by which peptides bind to micelles is believed to be a two-phase process, involving (i). initial electrostatic interactions between the peptide and micelle surface, followed by (ii). hydrophobic interactions between peptide side chains and the micelle core. To better characterize the electrostatic portio...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2004.10506949

    authors: Whitehead TL,Jones LM,Hicks RP

    更新日期:2004-02-01 00:00:00

  • PEG and mPEG-anthracene conjugate with trypsin and trypsin inhibitor: hydrophobic and hydrophilic contacts.

    abstract::The conjugation of trypsin (try) and trypsin inhibitor (tryi) with poly(ethylene glycol) (PEG) and methoxypoly(ethylene glycol) anthracene (mPEG-anthracene) was investigated in aqueous solution, using multiple spectroscopic methods, thermodynamic analysis, and molecular modeling. Thermodynamic parameters ΔS, ΔH, and Δ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2016.1214621

    authors: Chanphai P,Agudelo D,Tajmir-Riahi HA

    更新日期:2017-08-01 00:00:00

  • Structure-wise discrimination of cytosine, thymine, and uracil by proteins in terms of their nonbonded interactions.

    abstract::The molecular recognition and discrimination of very similar ligand moieties by proteins are important subjects in protein-ligand interaction studies. Specificity in the recognition of molecules is determined by the arrangement of protein and ligand atoms in space. The three pyrimidine bases, viz. cytosine, thymine, a...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2013.832384

    authors: Usha S,Selvaraj S

    更新日期:2014-01-01 00:00:00

  • BREED based de novo hybridization approach: generating novel T790M/C797S-EGFR tyrosine kinase inhibitors to overcome the problem of mutation and resistance in non small cell lung cancer (NSCLC).

    abstract::Third generation EGFR inhibitor osimertinib was approved as the first-line treatment for EGFR T790M mutation-positive Non-Small Cell Lung Cancer (NSCLC) patients in 2017. However, EGFR tertiary Cys797 to Ser797 (C797S) point mutation emanate rapidly after treatment of osimertinib, which is undruggable mutation to the ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1754918

    authors: Patel HM,Shaikh M,Ahmad I,Lokwani D,Surana SJ

    更新日期:2020-04-23 00:00:00

  • Inactivation kinetics of beta-N-acetyl-D-glucosaminidase from green crab (Scylla serrata) in dioxane solution.

    abstract::Beta-N-acetyl-D-glucosaminidase (NAGase, EC.3.2.1.52), which catalyzes the cleavage of N-acetylglucosamine polymers, is a composition of chitinase and cooperates with endo-chitinase and exo-chitinase to disintegrate chitin into N-acetylglucosamine (NAG). In this investigation, A NAGase from green crab (Scylla serrata)...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2009.10507266

    authors: Xie JJ,Chen CQ,Yan YW,Zhang JP,Lin JC,Wang Q,Zhou HT,Chen QX

    更新日期:2009-02-01 00:00:00

  • Interaction of the alternating double stranded copolymer poly(dA-dT) x poly(dA-dT) with NiCl(2) and CdCl(2): solution behavior.

    abstract::The thermal denaturation of the synthetic high molecular weight double stranded polynucleotide poly(dA-dT) x poly(dA-dT) has been studied in aqueous buffered solution (Tris 1.0 mM; pH 7.8+/-0.2) in the presence of increasing concentrations of either Ni(2+) (borderline cation) or Cd(2+) (soft cation) at four different ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2007.10507157

    authors: Airoldi M,Gennaro G,Giomini M,Giuliani AM,Giustini M

    更新日期:2007-08-01 00:00:00

  • DFT and docking studies of designed conjugates of noscapines & repurposing drugs: promising inhibitors of main protease of SARS-CoV-2 and falcipan-2.

    abstract::First case of the present epidemic, coronavirus disease (COVID-19) is reported in the Wuhan, a city of the China and all the countries throughout the world are being affected. COVID-19 is named by World Health Organization and it stands for coronavirus disease-19. As on 27th October, 2020, 73,776,588 people around the...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1841030

    authors: Kumar A,Kumar D,Kumar R,Singh P,Chandra R,Kumari K

    更新日期:2020-11-03 00:00:00

  • Structural and biological study of synthesized anthraquinone series of compounds with sulfonamide feature.

    abstract::1, 4 and 5, 8-Positions as well as type of functionalities on these positions at anthraquinone-9, 10-dione are proposed to be significant for anticancer activity. Therefore, keeping this into consideration, a series of 1-substituted anthraquinone-based compounds are designed, synthesized, characterized and biologicall...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2018.1552198

    authors: Awasthi P,Vatsal M,Sharma A

    更新日期:2019-10-01 00:00:00

  • Stilbene-based natural compounds as promising drug candidates against COVID-19.

    abstract::The pandemic coronavirus disease (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) presents a great threat to public health. Currently, no potent medicine is available to treat COVID-19. Quest for new drugs especially from natural plant sources is an area of immense potential. The curre...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1762743

    authors: Wahedi HM,Ahmad S,Abbasi SW

    更新日期:2020-05-12 00:00:00

  • Synthesis, characterization, in silico ADMET prediction, and protein binding analysis of a novel zinc(II) Schiff-base complex: Application of multi-spectroscopic and computational techniques.

    abstract::By reaction of 1,2-diaminocyclohexane with the 2,3-butanedione monoxime in the presence of ZnCl2, a new Schiff base complex was obtained. This complex was characterized by elemental analyses, FT-IR, 1H NMR, UV-Vis, and conductivity measurements. The reactivity of this complex to human serum albumin (HSA) under simulat...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2017.1334595

    authors: Shahraki S,Shiri F,Saeidifar M

    更新日期:2018-05-01 00:00:00

  • An insight into selective and potent inhibition of histone deacetylase 8 through induced-fit docking, pharmacophore modeling and QSAR studies.

    abstract::Histone deacetylase 8 (HDAC8) has emerged as an important therapeutic target due to its involvement in various cancerous and neurodegenerative disease states. Since pan HDAC inhibition has been linked to various side effects, the need of the hour is to develop inhibitors truly selective for one isoform. This work atte...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2019.1567388

    authors: Kashyap K,Kakkar R

    更新日期:2020-01-01 00:00:00

  • Novel aryl β-aminocarbonyl derivatives as inhibitors of Trypanosoma cruzi trypanothione reductase: binding mode revised by docking and GRIND2-based 3D-QSAR procedures.

    abstract::Trypanothione reductase has long been investigated as a promising target for chemotherapeutic intervention in Chagas disease, since it is an enzyme of a unique metabolic pathway that is exclusively present in the pathogen but not in the human host, which has the analog Glutathione reductase. In spite of the present da...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2011.672633

    authors: de Paula da Silva CH,Bernardes LS,da Silva VB,Zani CL,Carvalho I

    更新日期:2012-01-01 00:00:00

  • Hybrid MC/QC simulations of water-assisted proton transfer in nucleosides. Guanosine and its analog acyclovir.

    abstract::To provide an in-depth insight into the molecular basis of spontaneous tautomerism in DNA and RNA base pairs, a hybrid Monte Carlo (MC)-quantum chemical (QC) methodology is implemented to map two-dimensional potential energy surfaces along the reaction coordinates of solvent-assisted proton transfer processes in guano...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2016.1179594

    authors: Markova N,Pejov L,Stoyanova N,Enchev V

    更新日期:2017-05-01 00:00:00

  • Interaction of flavonols with human serum albumin: a biophysical study showing structure-activity relationship and enhancement when coated on silver nanoparticles.

    abstract::Binding affinities of flavonols namely quercetin, myricetin, and kaempferol to human serum albumin (HSA) were determined fluorimetrically and the order was observed to be myricetin > quercetin > kaempferol demonstrating structure-activity relationship. Quercetin-coated silver nanoparticles (AgNPs) show higher binding ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2018.1462732

    authors: Das P,Chaudhari SK,Das A,Kundu S,Saha C

    更新日期:2019-04-01 00:00:00

  • Molecular dynamics simulations of a calmodulin-peptide complex in solution.

    abstract::We have performed an 4-ns MD simulation of calmodulin complexed with a target peptide in explicit water, under realistic conditions of constant temperature and pressure, in the presence of a physiological concentration of counterions and using Ewald summation to avoid truncation of long-range electrostatic forces. Dur...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2002.10506834

    authors: Yang C,Kuczera K

    更新日期:2002-10-01 00:00:00

  • Perturbations in the catecholamine metabolism and protective effect of "3-(3, 4-dimethoxy phenyl)-1-4(methoxy phenyl) prop-2-en-1-one" during ketamine-induced schizophrenia: an in vivo and in silico studies.

    abstract::Different kinds of secondary metabolites present in the medicinal plants play an important role to alleviate different human ailments including neurodegenerative disorders such as Parkinson's, Alzheimer's, epilepsy and schizophrenia etc. Recently we have isolated and characterized a novel bioactive compound viz. 3-(3,...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1765875

    authors: Venkataramaiah C,Lakshmi Priya B,Rajendra W

    更新日期:2020-05-18 00:00:00

  • Selective binding of synthetic polypeptides to DNA of varying composition and sequence: effect of minor groove binding drugs.

    abstract::Repetitive basic polypeptides containing lysine or arginine as every third amino acid were shown to cause DNA condensation at physiological salt concentration connected with selective DNA binding with respect to DNA composition and sequence. This selectivity is very similar to that existing in the case of histone H1 a...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.1996.10508912

    authors: Sponar J,Votavová H

    更新日期:1996-06-01 00:00:00