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1.

2979
Accesses

Research article   Open Access Highly Accessed

Molecular dynamics and mutational analysis of the catalytic and translocation cycle of RNA polymerase

Maria L Kireeva, Kristopher Opron, Steve A Seibold, Céline Domecq, Robert I Cukier, Benoit Coulombe, Mikhail Kashlev, Zachary F Burton BMC Biophysics 2012, 5:11 (7 June 2012)

Abstract | Full text | PDF | PubMed |  Editor’s summary

The catalytic confirmation of the RNA polymerase ternary elongation complex (TEC) has a closed trigger loop with a relatively dehydrated active site, in contrast to the inactive open confirmation of the trigger loop which supports translocation.

2.

2587
Accesses

Correspondence   Open Access Highly Accessed

Can dietary fibre help provide safer food products for sufferers of gluten intolerance? A well-established biophysical probe may help towards providing an answer

M Kök, Richard Gillis, Shirley Ang, David Lafond, Arthur S Tatham, Gary Adams, Stephen E Harding BMC Biophysics 2012, 5:10 (17 May 2012)

Abstract | Full text | PDF | PubMed | 1 comment |  Editor’s summary

Stephen Harding and colleagues speculate on the role that the ultracentrifuge assay procedure could play in detecting non-toxic biopolymers capable of sequestering ingested gluten peptides, with the eventual aim of reducing gluten intolerance symptoms.

3.

2526
Accesses

Commentary   Open Access Highly Accessed

Intracellular chemical gradients: morphing principle in bacteria

Robert G Endres BMC Biophysics 2012, 5:18 (7 September 2012)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Robert Endres discusses a new study in BMC Biophysics that supports the emerging view that intracellular chemical gradients can exist in bacterial cells, and how these may limit in vitro analyses.

4.

2094
Accesses

Research article   Open Access Highly Accessed

Stochastic dynamics of virus capsid formation: direct versus hierarchical self-assembly

Johanna E Baschek, Heinrich C R Klein, Ulrich S Schwarz BMC Biophysics 2012, 5:22 (17 December 2012)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Computational modeling of the way that viruses are able to self-assemble their protein capsid coats suggests that for complex viruses with more stable bonds, a piecemeal hierarchical assembly process is most likely.

5.

1903
Accesses

Software   Open Access Highly Accessed

DelPhi: a comprehensive suite for DelPhi software and associated resources

Lin Li, Chuan Li, Subhra Sarkar, Jie Zhang, Shawn Witham, Zhe Zhang, Lin Wang, Nicholas Smith, Marharyta Petukh, Emil Alexov BMC Biophysics 2012, 5:9 (14 May 2012)

Abstract | Full text | PDF | PubMed | Cited on BioMed Central |  Editor’s summary

The DelPhi package is a comprehensive and user-friendly suite of tools for modelling electrostatic potentials in macromolecules using the Poisson-Boltzmann Equation, and is now enriched with additional features for greater usability.

6.

1895
Accesses

Research article   Open Access Highly Accessed

A biophysical model for transcription factories

Ana Z Canals-Hamann, Ricardo das Neves, Joyce E Reittie, Carlos Iñiguez, Shamit Soneji, Tariq Enver, Veronica J Buckle, Francisco J Iborra BMC Biophysics 2013, 6:2 (9 February 2013)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Chromatin can act as a multi-block copolymer with active-inactive monomers that spontaneously self-organize to form microdomains, demonstrating that geometrical constraints alone can potentially yield an organized transcription factory.

7.

1888
Accesses

Review   Open Access Highly Accessed

Diffusion in crowded biological environments: applications of Brownian dynamics

Maciej Długosz, Joanna Trylska BMC Biophysics 2011, 4:3 (2 March 2011)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Maciej Dlugosz and Joanna Trylska review recent developments in particle-based Brownian dynamics algorithms and their application to model diffusive transport in crowded systems, which are proving useful in improving our understanding of metabolism, transport and signaling.

8.

1882
Accesses

Editorial   Open Access Highly Accessed

Diffusion and association processes in biological systems: theory, computation and experiment

Paolo Mereghetti, Daria Kokh, J Andrew McCammon, Rebecca C Wade BMC Biophysics 2011, 4:2 (2 March 2011)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Rebecca Wade and colleagues provide a snapshot of research from a thematic series of articles on biological diffusion and Brownian dynamics simulations, which highlights a vibrant research field with growing synergy between experimental and computational studies.

9.

1857
Accesses

Research article   Open Access Highly Accessed

Two-color STED microscopy reveals different degrees of colocalization between hexokinase-I and the three human VDAC isoforms

Daniel Neumann, Johanna Bückers, Lars Kastrup, Stefan W Hell, Stefan Jakobs PMC Biophysics 2010, 3:4 (5 March 2010)

Abstract | Full text | PDF | PubMed |  Editor’s summary

The voltage-dependent anion channel (VDAC, also known as mitochondrial porin) is the major transport channel mediating the transport of metabolites, including ATP, across the mitochondrial outer membrane. In this study we show that whereas hVDAC1 and hVDAC2 are localized predominantly within the same distinct domains in the outer membrane, hVDAC3 is mostly uniformly distributed over the surface of the mitochondrion.

10.

1827
Accesses

Research article   Open Access Highly Accessed

Hierarchical super-structure identified by polarized light microscopy, electron microscopy and nanoindentation: Implications for the limits of biological control over the growth mode of abalone sea shells

Andreas S Schneider, Birgit Heiland, Nicolas J Peter, Christina Guth, Eduard Arzt, Ingrid M Weiss BMC Biophysics 2012, 5:19 (12 September 2012)

Abstract | Full text | PDF | PubMed |  Editor’s summary

The hierarchical super-structure of abalone mollusc shells can be revealed by conventional light microscopy methods, opening the potential to study shell growth mechanisms in vivo at high resolution.

11.

1816
Accesses

Mini-review   Open Access Highly Accessed

The multiple faces of self-assembled lipidic systems

Guillaume Tresset PMC Biophysics 2009, 2:3 (17 April 2009)

Abstract | Full text | PDF | PubMed | Cited on BioMed Central |  Editor’s summary

From the plasma membrane of archaebacteria to gene delivery, self-assembled lipidic systems have left their mark in cell biology and nanobiotechnology; however, the underlying physics is yet to be fully unraveled.

12.

1753
Accesses

Research article   Open Access

Diffusion of hydrophobin proteins in solution and interactions with a graphite surface

Paolo Mereghetti, Rebecca C Wade BMC Biophysics 2011, 4:9 (21 April 2011)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Hydrophobins, the most powerful surface-active proteins known, exist in solution as a mixture of monomers in equilibrium with different types of oligomers but in contact with a graphite layer they form tetramers and accumulate close to the hydrophobic surface.

13.

1706
Accesses

Review   Open Access Highly Accessed

Hierarchies in eukaryotic genome organization: Insights from polymer theory and simulations

Balaji VS Iyer, Martin Kenward, Gaurav Arya BMC Biophysics 2011, 4:8 (15 April 2011)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Gaurav Arya and colleagues review results from state-of-the-art microscopy and chromosome conformation capture techniques that are being used to understand the three dimensional structure of the genome and the physical principles governing its folding.

14.

1652
Accesses

Research article   Open Access Highly Accessed

Arbitrary protein−protein docking targets biologically relevant interfaces

Juliette Martin, Richard Lavery BMC Biophysics 2012, 5:7 (6 May 2012)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Docking of target proteins against an arbitrary set of partners generally leads to non-random localization of interaction interfaces as the false complexes favor residues from true interaction sites, allowing prediction of biologically relevant protein interfaces

15.

1648
Accesses

Research article   Open Access Highly Accessed

Protein dynamics at Eph receptor-ligand interfaces as revealed by crystallography, NMR and MD simulations

Haina Qin, Liangzhong Lim, Jianxing Song BMC Biophysics 2012, 5:2 (25 January 2012)

Abstract | Full text | PDF | PubMed | Cited on BioMed Central | F1000 Biology |  Editor’s summary

Structural determination of the EphA4 ligand binding domain provides the first experimental and computational evidence that intrinsic dynamics are most likely to be responsible for the observed high conformational diversity that mediates binding affinity and specificity.

16.

1578
Accesses

Research article   Open Access Highly Accessed

Pulling chromatin apart: Unstacking or Unwrapping?

Jean Marc Victor, Jordanka Zlatanova, Maria Barbi, Julien Mozziconacci BMC Biophysics 2012, 5:21 (27 November 2012)

Abstract | Full text | PDF | PubMed |  Editor’s summary

A zig-zag model of chromatin fiber morphology is able to quantitatively explain the mechanical properties of chromatin under external stress, and provides an alternative explanation to the widespread solenoid model interpretation.

17.

1501
Accesses

Research article   Open Access Highly Accessed

Clustering of HIV-1 Subtypes Based on gp120 V3 Loop electrostatic properties

Aliana López de Victoria, Chris A Kieslich, Apostolos K Rizos, Elias Krambovitis, Dimitrios Morikis BMC Biophysics 2012, 5:3 (7 February 2012)

Abstract | Full text | PDF | PubMed |  Editor’s summary

The spatial distributions of electrostatic potentials and charges in the V3 loop of HIV-1 protein gp120 may be responsible for both long- and short-range interactions with co-receptors, ultimately affecting viral entry into cells

18.

1413
Accesses

Research article   Open Access

Molecular dynamics simulations on aqueous two-phase systems - Single PEG-molecules in solution

Stefan A Oelmeier, Florian Dismer, Jürgen Hubbuch BMC Biophysics 2012, 5:14 (8 August 2012)

Abstract | Full text | PDF | PubMed

19.

1348
Accesses

Research article   Open Access

Many-particle Brownian and Langevin Dynamics Simulations with the Brownmove package

Tihamér Geyer BMC Biophysics 2011, 4:7 (13 April 2011)

Abstract | Full text | PDF | PubMed |  Editor’s summary

A new "brownmove" simulation package designed for coarse-grained many-particle simulations of biologically relevant diffusion and transport processes combines Brownian and Langevin Dynamics propagation with fast hydrodynamics, a flexible protein model and interfaces for "open" simulation settings.

20.

1321
Accesses

Research article   Open Access Highly Accessed

The influence of membrane physical properties on microvesicle release in human erythrocytes

Laurie J Gonzalez, Elizabeth Gibbons, Rachel W Bailey, Jeremy Fairbourn, Thaothanh Nguyen, Samantha K Smith, Katrina B Best, Jennifer Nelson, Allan M Judd, John D Bell PMC Biophysics 2009, 2:7 (24 August 2009)

Abstract | Full text | PDF | PubMed | 1 comment |  Editor’s summary

Exposure of human erythrocytes to elevated intracellular calcium causes fragments of the cell membrane to be shed as microvesicles. This study tested the hypothesis that microvesicle release depends on microscopic membrane physical properties such as lipid order, fluidity, and composition.

21.

1321
Accesses

Research article   Open Access Highly Accessed

On the electrostatic component of protein-protein binding free energy

Kemper Talley, Carmen Ng, Michael Shoppell, Petras Kundrotas, Emil Alexov PMC Biophysics 2008, 1:2 (5 November 2008)

Abstract | Full text | PDF | PubMed | Cited on BioMed Central |  Editor’s summary

This paper presents a comprehensive statistical analysis of the sensitivity of the electrostatic component of binding free energy (DDGel) with respect with different force fields (Charmm, Amber, and OPLS), different values of the internal dielectric constant, and different presentations of molecular surface (different values of the probe radius).

22.

1308
Accesses

Research article   Open Access

Fluorescence anisotropy of diphenylhexatriene and its cationic Trimethylamino derivative in liquid dipalmitoylphosphatidylcholine liposomes: opposing responses to isoflurane

Steven C Nelson, Steven K Neeley, Eric D Melonakos, John D Bell, David D Busath BMC Biophysics 2012, 5:5 (24 March 2012)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Steady-state anisotropy of two fluorescent probes at different depths in a lipid bilayer reveals a decrease in anisotropy with increasing isoflurane anesthetic concentration, reflecting changes in the lateral pressure profile of the membrane.

23.

1289
Accesses

Research article   Open Access

Resolution of complex fluorescence spectra of lipids and nicotinic acetylcholine receptor by multivariate analysis reveals protein-mediated effects on the receptor's immediate lipid microenvironment

Jorge J Wenz, Francisco J Barrantes PMC Biophysics 2008, 1:6 (18 December 2008)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Resolution of complex fluorescence spectra of lipids and nicotinic acetylcholine receptor by multivariate analysis reveals protein-mediated effects on the receptor's immediate microenvironment, rigidifying the surrounding lipid and preferring dioleoylphosphatidic acid over dioleoylphosphatidylcholine.

24.

1264
Accesses

Research article   Open Access

Differences in adhesion and protrusion properties correlate with differences in migration speed under EGF stimulation

Yue Hou, Sarah Hedberg, Ian C Schneider BMC Biophysics 2012, 5:8 (11 May 2012)

Abstract | Full text | PDF | PubMed

25.

1216
Accesses

Research article   Open Access Highly Accessed

An upper limit for macromolecular crowding effects

Andrew C Miklos, Conggang Li, Courtney D Sorrell, L Andrew Lyon, Gary J Pielak BMC Biophysics 2011, 4:13 (31 May 2011)

Abstract | Full text | PDF | PubMed |  Editor’s summary

Synthetic microgels that interact weakly with proteins do not strongly influence protein dynamics or stability because these large microgels constitute an upper size limit on crowding effects.

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