General acid-base catalysis in nucleobase amino proton exchange: cytidine.

Abstract:

:A useful property of DMSO solvent has been exploited to reveal a new catalytic route for cytidine amino proton exchange, relevant to exchange in the macromolecular state, but hidden in aqueous solution. Additional exchange mechanisms in aqueous monomeric cytidine (and adenosine) are obscured by the formation of a fast-exchanging endocyclic-protonated intermediate, which dominates the kinetics. Endocyclic nucleobase protonation could be circumvented in the presence of buffer conjugate acid by the use of DMSO/water solvent, permitting the first unequivocal observation buffer acid-catalyzed exchange from the neutral, unprotonated nucleobase, i.e., general acid catalysis. Because buffer ionization is greatly reduced in DMSO through anion desolvation, nucleobase protonation is suppressed in the presence of buffer acid. Evidence is presented to describe this catalytic route as one involving hydrogen bond formation between the buffer acid and the endocyclic protonation site, C(N-3). Since this same configuration is found in Watson-Crick hydrogen bonding, experiments are presented to demonstrate faster cytidine amino proton exchange with the formation of the G-C base pair in DMSO. The importance of this mechanism in past aqueous monomer studies and in the interpretation of macromolecular (DNA) hydrogen exchange is discussed.

journal_name

J Biomol Struct Dyn

authors

McConnell B

doi

10.1080/07391102.1986.10506359

subject

Has Abstract

pub_date

1986-12-01 00:00:00

pages

419-36

issue

3

eissn

0739-1102

issn

1538-0254

journal_volume

4

pub_type

杂志文章
  • Effect of CTerm of human albumin on the aggregation propensity of Aβ1-42 peptide: a potential of mean force study.

    abstract::Alzheimer's disease (AD) is the most common progressive neurodegenerative brain disorder. It is characterized by the presence of extracellular aggregated fibrillary form of amyloid beta (Aβ) peptide and intraneuronal neurofibrillary tangles caused by the hyperphosphorylation of tau protein. Monomeric form of Aβ peptid...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1730970

    authors: Dutta N,Borah P,Mattaparthi VSK

    更新日期:2020-03-02 00:00:00

  • Glycation, oxidation and glycoxidation of IgG: a biophysical, biochemical, immunological and hematological study.

    abstract::Glycation and oxidation induce structural alterations in the proteins in an interdependent manner with consequent pathological implications. The published literature presents wide range of modifications in conformational characteristics of proteins by glycation and oxidation; however, there is little data that could e...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2017.1365770

    authors: Islam S,Moinuddin,Mir AR,Raghav A,Habib S,Alam K,Ali A

    更新日期:2018-08-01 00:00:00

  • Synthesis and spectroscopic characterizations of hexakis[(1-(4'-oxyphenyl)-3-(substituted-phenyl)prop-2-en-1-one)]cyclotriphosphazenes: their in vitro cytotoxic activity, theoretical analysis and molecular docking studies.

    abstract::The hexachlorocyclotriphosphaze compound (N3P3Cl6, HCCP) was reacted with excess (E)-(1-(4'-oxyphenyl)-3-(substituted-phenyl)prop-2-en-1-ones (2-11) to produce hexakis[(1-(4-oxyphenyl)-3-(substituted-phenyl)prop-2-en-1-one)]cyclotriphosphazenes (CP 2-11). The structures of products (CP 2-11) were confirmed using eleme...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1846621

    authors: Doğan H,Bahar MR,Çalışkan E,Tekin S,Uslu H,Akman F,Koran K,Sandal S,Görgülü AO

    更新日期:2020-11-19 00:00:00

  • The four repeat Giardia lamblia telomere forms tetramolecular G-quadruplex with antiparallel topology.

    abstract::Guanine rich DNA sequences of regulatory genomic regions form secondary structures known as G-quadruplexes usually stabilized by tetrads of Hoogsteen hydrogen bonded guanines. The in vivo existence of G-quadruplexes ascertains their biological roles. Human telomeric repeats are the most studied G-rich sequences. The f...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2019.1623074

    authors: Bansal A,Kukreti S

    更新日期:2020-04-01 00:00:00

  • Comparison of the structures of the metal-thiolate binding site in Zn(II)-, Cd(II)-, and Hg(II)-metallothioneins using molecular modeling techniques.

    abstract::The first fully energy-minimized structures for a series of structurally related metal complexes of the important mammalian metal binding protein metallothionein are described. The structures were calculated based on structural information obtained from existing spectroscopic and crystallographic data, and minimized u...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.1997.10508139

    authors: Fowle DA,Stillman MJ

    更新日期:1997-02-01 00:00:00

  • Structural glycobiology of heparinase II from Pedobacter heparinus.

    abstract::The current work presents a conformational evaluation of heparinase II (hepII) from Pedobacter heparinus, employing molecular dynamics (MD) simulations, in order to characterize the main features of the enzyme dynamics, as well as the role of the glycan and metal components on the protein scaffold. Accordingly, four s...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2013.809604

    authors: Fernandes CL,Escouto GB,Verli H

    更新日期:2014-01-01 00:00:00

  • Denaturation of HIV-1 protease (PR) monomer by acetic acid: mechanistic and trajectory insights from molecular dynamics simulations and NMR.

    abstract::Inside a living cell there can be a variety of interactions for any given protein, which serve to regulate denaturation and renaturation processes. Insights into some of them can be obtained by in vitro studies using various denaturing agents. In this study, all-atom MD simulations in explicit solvent and NMR relaxati...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/073911012010525025

    authors: Borkar A,Rout MK,Hosur RV

    更新日期:2012-01-01 00:00:00

  • Nucleosome repeat lengths and columnar chromatin structure.

    abstract::Thorough quantitative study of nucleosome repeat length (NRL) distributions, conducted in 1992 by J. Widom, resulted in a striking observation that the linker lengths between the nucleosomes are quantized. Comparison of the NRL average values with the MNase cut distances predicted from the hypothetical columnar struct...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2015.1075158

    authors: Trifonov EN

    更新日期:2016-06-01 00:00:00

  • Identification of potential inhibitors of SARS-COV-2 endoribonuclease (EndoU) from FDA approved drugs: a drug repurposing approach to find therapeutics for COVID-19.

    abstract::SARS-CoV-2 is causative agent of COVID-19, which is responsible for severe social and economic disruption globally. Lack of vaccine or antiviral drug with clinical efficacy suggested that drug repurposing approach may provide a quick therapeutic solution to COVID-19. Nonstructural protein-15 (NSP15) encodes for an uri...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1775127

    authors: Chandra A,Gurjar V,Qamar I,Singh N

    更新日期:2020-06-09 00:00:00

  • Nanoporous iron oxide nanoparticle: hydrothermal fabrication, human serum albumin interaction and potential antibacterial effects.

    abstract::Nanoporous iron oxide (Fe3O4) nanoparticles (NIONPs) have been widely used as promising agents in biomedical applications. Herein, the NIONPs were synthesized by one-step hydrothermal method and well-characterized by FESEM and TEM investigations. Afterwards, their interaction with human serum albumin (HSA) was studied...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1751296

    authors: Mehrabi M,Ghasemi MF,Rasti B,Falahati M,Mirzaie A,Hasan A

    更新日期:2020-04-15 00:00:00

  • Triplex forming oligonucleotides targeted to hmga1 selectively inhibit its expression and induce apoptosis in human cervical cancer.

    abstract::High-mobility group A1 (HMGA1) is a non-histone chromosomal protein, which is known as 'architectural' transcription factor that facilitates the assembly of 'enhanceosome.' Because of its elevated expression in a number of human malignancies, with barely minimal levels in healthy adults, HMGA1 is considered as potenti...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2016.1160257

    authors: Akhter MZ,Rajeswari MR

    更新日期:2017-03-01 00:00:00

  • Dancing with Trojan horses: an interplay between the extracellular vesicles and viruses.

    abstract::Extracellular vesicles (EVs) are membrane-encapsulated particles released by eukaryotic and prokaryotic cells into the extracellular environment. Depending on their origin, size, and composition, EVs are grouped in several classes, with one of them being exosomes, which are small EVs (SEVs) generated within the endoso...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1756409

    authors: Badierah RA,Uversky VN,Redwan EM

    更新日期:2020-04-30 00:00:00

  • How good are ensembles in improving QSAR models? The case with eCoRIA.

    abstract::A conceptually new idea in quantitative structure-activity relationships (QSAR) which makes use of ensembles from molecular dynamics (MD) trajectories and information retrieved from enzyme-inhibitor binding thermodynamics is presented in this study. This new methodology, termed ensemble comparative residue interaction...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2014.909744

    authors: Khedkar VM,Joseph J,Pissurlenkar R,Saran A,Coutinho EC

    更新日期:2015-01-01 00:00:00

  • Structural analysis, molecular docking and molecular dynamics simulations of G-protein-coupled receptor (kisspeptin) in fish.

    abstract::Kisspeptins are neuropeptide that has emerged as an essential gatekeeper for reproduction and onset of puberty in higher vertebrates including fish. In present study, structural analysis, molecular docking and molecular dynamics simulations of kisspeptin receptor (kiss2r) were carried out, which is a G-protein-coupled...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2019.1633407

    authors: Rather MA,Dutta S,Guttula PK,Dhandare BC,Yusufzai SI,Zafar MI

    更新日期:2020-05-01 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

  • Insight into molecular characteristics of SARS-CoV-2 spike protein following D614G point mutation, a molecular dynamics study.

    abstract::Undoubtedly, the SARS-CoV-2 has become a major concern for all societies due to its catastrophic effects on public health. In addition, mutations and changes in the structure of the virus make it difficult to design effective treatment. Moreover, the amino acid sequence of a protein is a major factor in the formation ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2021.1872418

    authors: Mahmoudi Gomari M,Rostami N,Omidi-Ardali H,Arab SS

    更新日期:2021-01-21 00:00:00

  • Docking analysis insights quercetin can be a non-antibiotic adjuvant by inhibiting Mmr drug efflux pump in Mycobacterium sp. and its homologue EmrE in Escherichia coli.

    abstract::Drug efflux pumps (EP) like Mmr in Mycobacterium transported drugs out of cell, a main reason for drug resistance developing in Mycobacterium tuberculosis. In this in silico study, mainly analysed EP inhibitory potential of a plant-derived flavonoid, quercetin, through docking analysis. Mmr present in Mycobacterium sm...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2014.974211

    authors: Suriyanarayanan B,Sarojini Santhosh R

    更新日期:2015-01-01 00:00:00

  • Model for the porphyrin-DNA binding site: ENDOR investigations of Cu-porphyrins binding to DNA.

    abstract::Proton ENDOR has been observed from frozen solutions (ca. 38K degrees) of copper meso-(4-N-tetra-methylpyridyl)porphyrin (CuTMpyP(4)) complexed with Salmon sperm DNA in water and D2O. Lines from exchangeable protons of the DNA bases have been observed in these ENDOR spectra. Analyses of these ENDOR data show that the ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.1992.10507962

    authors: Greiner SP,Kreilick RW,Marzilli LG

    更新日期:1992-04-01 00:00:00

  • Characteristics, dynamics and mechanisms of actions of some major stress-induced biomacromolecules; addressing Artemia as an excellent biological model.

    abstract::Stress tolerance is one of the most prominent and interesting topics in biology since many macro- and micro-adaptations have evolved in resistant organisms that are worth studying. When it comes to confronting various environmental stressors, the extremophile Artemia is unrivaled in the animal kingdom. In the present ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1796793

    authors: Khodajou-Masouleh H,Shahangian SS,Attar F,H Sajedi R,Rasti B

    更新日期:2020-07-31 00:00:00

  • Improved chips for sequencing by hybridization.

    abstract::The SHOM method (Sequencing by Hybridization with Oligonucleotide Matrix) developed in 1988 is a new approach to nucleic acid sequencing by hybridization to an oligonucleotide matrix composed of an array of immobilized oligonucleotides. The original matrix proposed for sequencing by SHOM had to contain at least 65,536...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.1991.10507920

    authors: Pevzner PA,Lysov YuP,Khrapko KR,Belyavsky AV,Florentiev VL,Mirzabekov AD

    更新日期:1991-10-01 00:00:00

  • Reliable structural information for rational design of benzoxazole type potential cholesteryl ester transfer protein (CETP) inhibitors through multiple validated modeling techniques.

    abstract::The drug design and discovery of lipid modulators is very demanding as no new molecule has entered into the market in the last 35 years. Cholesteryl ester transfer protein (CETP) is a promising target as lipid modulators. Inhibition of the CETP enzyme reduces the risk of cardiovascular events. The first CETP inhibitor...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2018.1552895

    authors: Amin SA,Adhikari N,Gayen S,Jha T

    更新日期:2019-10-01 00:00:00

  • The triplet code from first principles.

    abstract::Temporal order ("chronology") of appearance of amino acids and their respective codons on evolutionary scene is reconstructed. A consensus chronology of amino acids is built on the basis of 60 different criteria each offering certain temporal order. After several steps of filtering the chronology vectors are averaged ...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 历史文章,杂志文章

    doi:10.1080/07391102.2004.10506975

    authors: Trifonov EN

    更新日期:2004-08-01 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

  • Exploration of the effects of sequence variations between HIV-1 and HIV-2 proteases on their three-dimensional structures.

    abstract::HIV protease inhibitors (PIs) approved by the FDA (US Food and Drug Administration) are a major class of antiretroviral. HIV-2 protease (PR2) is naturally resistant to most of them as PIs were designed for HIV-1 protease (PR1). In this study, we explored the impact of amino-acid substitutions between PR1 and PR2 on th...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2019.1704877

    authors: Triki D,Kermarrec M,Visseaux B,Descamps D,Flatters D,Camproux AC,Regad L

    更新日期:2020-10-01 00:00:00

  • In silico evaluation of phenolic compounds as inhibitors of Α-amylase and Α-glucosidase.

    abstract::The aim of the present study focuses on the molecular docking approach to screen alternative drug that can regulate the hyperglycemia by down-regulating α-glucosidase and α-amylase activity using phenolic compounds: tannic acid (L1), catechin (L2), gallic acid (L3), quercetin (L5) and epicatechin (L6). L1 gives the be...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1718553

    authors: Abdelli I,Benariba N,Adjdir S,Fekhikher Z,Daoud I,Terki M,Benramdane H,Ghalem S

    更新日期:2020-02-10 00:00:00

  • DNA binding by TATA-box binding protein (TBP): a molecular dynamics computational study.

    abstract::TATA-box binding protein (TBP) in a monomeric form and the complexes it forms with DNA have been elucidated with molecular dynamics simulations. Large TBP domain motions (bend and twist) are detected in the monomer as well as in the DNA complexes; these motions can be important for TBP binding of DNA. TBP interacts wi...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.1996.10508872

    authors: Miaskiewicz K,Ornstein RL

    更新日期:1996-02-01 00:00:00

  • Enhanced sampling of molecular dynamics simulation of peptides and proteins by double coupling to thermal bath.

    abstract::Low sampling efficiency in conformational space is the well-known problem for conventional molecular dynamics. It greatly increases the difficulty for molecules to find the transition path to native state, and costs amount of CPU time. To accelerate the sampling, in this paper, we re-couple the critical degrees of fre...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2012.698244

    authors: Chen C,Huang Y,Xiao Y

    更新日期:2013-01-01 00:00:00

  • Elucidation of molecular interactions between human γD-crystallin and quercetin, an inhibitor against tryptophan oxidation.

    abstract::Different post-translational changes in eye lens crystallin proteins contribute towards the development of cataract. We have studied in vitro oxidative modification of tryptophan (Trp) residues of human γD-crystallin (HGD) towards formation of N-formylkynurenine (NFK) associated with cataractogenesis. This oxidation w...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2020.1738960

    authors: Rana S,Sarmah S,Singha Roy A,Ghosh KS

    更新日期:2020-03-18 00:00:00

  • A novel major groove binding site in B-form DNA for ethidium cation.

    abstract::A stably-bound external binding site for ethidium cation in the major groove of B-form DNA is proposed. This complex is stabilized by hydrogen bonding between this ligand and the nucleophilic centers O6 and N7 of guanine, both of which are accessible via the major groove. This binding site is not the same as the well-...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2007.10507160

    authors: Monaco RR

    更新日期:2007-10-01 00:00:00

  • In silico 3D structure modeling and inhibitor binding studies of human male germ cell-associated kinase.

    abstract::Human male germ cell-associated kinase (hMAK) is an androgen-inducible gene in prostate epithelial cells, and it acts as a coactivator of androgen receptor signaling in prostate cancer. The 3D structure of the hMAK kinase was modeled based on the crystal structure of CDK2 kinase using comparative modeling methods, and...

    journal_title:Journal of biomolecular structure & dynamics

    pub_type: 杂志文章

    doi:10.1080/07391102.2014.968622

    authors: Tanneeru K,Balla AR,Guruprasad L

    更新日期:2015-01-01 00:00:00