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Exploiting neutron scattering contrast variation in biological membrane studies

BIOPHYSICS REVIEWS (2022)

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Article Biochemistry & Molecular Biology

Low membrane fluidity triggers lipid phase separation and protein segregation in living bacteria

Marvin Gohrbandt et al.

Summary: Living organisms adjust their membrane lipid composition in response to changes in their environment or diet. Understanding the key concepts of membrane biology linked to regulation of lipid composition is crucial, and in vitro studies have been relied upon heavily. However, research using bacterial organisms has shown that inadequate in vivo membrane fluidity can interfere with essential cellular processes, and very low membrane fluidity can trigger lipid phase separation and protein segregation in living cells.

EMBO JOURNAL (2022)

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Article Biochemistry & Molecular Biology

Changes in fluidity of the E. coli outer membrane in response to temperature, divalent cations and polymyxin-B show two different mechanisms of membrane fluidity adaptation

Luis David Ginez et al.

Summary: The outer membrane (OM) is crucial for Gram-negative bacterial cell envelope, with restricted diffusion of OM proteins and LPS creating a semi-crystalline state. The low fluidity of OM contributes to cell rigidity, with LPS characteristics strongly influencing OM properties and fluidity. Measurement of LPS fluidity can be challenging but important for understanding membrane dynamics.

FEBS JOURNAL (2022)

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Article Chemistry, Physical

Lipopolysaccharides at Solid and Liquid Interfaces: Models for Biophysical Studies of the Gram-negative Bacterial Outer Membrane

Nicolo Paracini et al.

Summary: Lipopolysaccharides (LPSs) are crucial components of Gram-negative bacterial outer membranes, and studying their structure and biophysical properties can provide insights into their interactions with antimicrobial compounds.

ADVANCES IN COLLOID AND INTERFACE SCIENCE (2022)

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Article Multidisciplinary Sciences

An oomycete NLP cytolysin forms transient small pores in lipid membranes

Katja Pirc et al.

Summary: This study reveals the unique molecular mechanism underlying the membrane damage induced by the cytotoxic model NLP, which involves a multistep process of small membrane ruptures to effectively damage plant cells.

SCIENCE ADVANCES (2022)

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Article Biophysics

Surface-tethered planar membranes containing the β-barrel assembly machinery: a platform for investigating bacterial outer membrane protein folding

Stephen C. L. Hall et al.

Summary: This study presents a platform for investigating Bam-mediated OMP insertion by reconstituting the complete Bam complex within a phospholipid bilayer on a gold surface derivatized with a copper-chelating self-assembled monolayer. Through structural characterization and monitoring changes in mass associated with OMP insertion, the functionality of this system was demonstrated by successfully inserting two diverse OMPs, pertactin, and OmpT. The platform holds promise for elucidating the mechanism of Bam-mediated OMP insertion and studying OMP function and activity within a phospholipid bilayer environment.

BIOPHYSICAL JOURNAL (2021)

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Review Biochemistry & Molecular Biology

Tracking Membrane Protein Dynamics in Real Time

Fredrik Oradd et al.

Summary: Membrane proteins play crucial roles in cellular processes, but their understanding is complicated by the dynamic nature of both the proteins and the surrounding lipids. Molecular dynamics simulations and enhanced sampling methods have aided in mapping membrane protein dynamics, while time-resolved X-ray scattering in solution is a powerful tool for tracking protein dynamics.

JOURNAL OF MEMBRANE BIOLOGY (2021)

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Review Chemistry, Multidisciplinary

How to Enter a Bacterium: Bacterial Porins and the Permeation of Antibiotics

Jigneshkumar Dahyabhai Prajapati et al.

Summary: Traditional antibiotics are facing the challenge of Gram-negative bacteria developing resistance, prompting the urgent need for new antibacterial agents. Designing new antibiotic molecules that can rapidly penetrate Gram-negative bacteria and achieve lethal intracellular drug accumulation is a major challenge. The lack of simple experimental techniques to measure antibiotic uptake and local concentrations in subcellular compartments is a limiting factor.

CHEMICAL REVIEWS (2021)

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Review Chemistry, Multidisciplinary

Biomembrane Structure and Material Properties Studied With Neutron Scattering

Jacob J. Kinnun et al.

Summary: The relationship between cell membrane structure and function is a fundamental principle in biology; neutron scattering techniques can be used to study hydrogen-rich materials such as biomembranes; modeling small-angle neutron scattering data and molecular dynamics simulations can reveal the structure, dynamics, and molecular interactions of biological membranes.

FRONTIERS IN CHEMISTRY (2021)

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Review Biochemistry & Molecular Biology

Highlighting membrane protein structure and function: A celebration of the Protein Data Bank

Fei Li et al.

Summary: Biological membranes define cell boundaries and compartmentalize processes, with the study of membrane protein structures playing a vital role in understanding their biological functions. Deposition of membrane protein structures into the PDB since 1985 allows for deeper insights, magnifying their impact in biology. Free access to membrane protein structures facilitates broader understanding and crucial new insights into their biological functions.

JOURNAL OF BIOLOGICAL CHEMISTRY (2021)

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Review Chemistry, Physical

Increasing complexity in small-angle X-ray and neutron scattering experiments: from biological membrane mimics to live cells

Enrico F. Semeraro et al.

Summary: Small-angle X-ray and neutron scattering methods are used to study the global structural properties of biological membrane mimicking systems, with recent advances focusing on complex model systems and data analysis techniques. Efforts have also been made to conduct quantitative scattering studies on live cells, bridging the gap between molecular and cellular length scales.

SOFT MATTER (2021)

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Review Immunology

Outer membrane vesicle vaccines

Francesca Micoli et al.

SEMINARS IN IMMUNOLOGY (2020)

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Review Chemistry, Physical

Recent developments in the application of X-ray and neutron reflectivity to soft-matter systems

Maximilian W. A. Skoda

CURRENT OPINION IN COLLOID & INTERFACE SCIENCE (2019)

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Article Chemistry, Multidisciplinary

Self-Assembled Fluid Phase Floating Membranes with Tunable Water Interlayers

Luke A. Clifton et al.

LANGMUIR (2019)

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Article Chemistry, Multidisciplinary

Optimization of reflectometry experiments using information theory

Bradley W. Treece et al.

JOURNAL OF APPLIED CRYSTALLOGRAPHY (2019)

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Article Biochemical Research Methods

Biological small-angle neutron scattering: recent results and development

Emilie Mahieu et al.

ACTA CRYSTALLOGRAPHICA SECTION D-STRUCTURAL BIOLOGY (2018)

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Article Multidisciplinary Sciences

Liquid crystalline bacterial outer membranes are critical for antibiotic susceptibility

Nicolo Paracini et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2018)

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Article Biochemical Research Methods

Determining the amphipol distribution within membrane-protein fibre samples using small-angle neutron scattering

Wanatchaporn Arunmanee et al.

ACTA CRYSTALLOGRAPHICA SECTION D-STRUCTURAL BIOLOGY (2018)

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Article Chemistry, Physical

Segmental Deuteration of α-Synuclein for Neutron Reflectometry on Tethered Bilayers

Zhiping Jiang et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2017)

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Review Microbiology

The Power of Asymmetry: Architecture and Assembly of the Gram-Negative Outer Membrane Lipid Bilayer

Jeremy C. Henderson et al.

ANNUAL REVIEW OF MICROBIOLOGY, VOL 70 (2016)

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Article Chemistry, Multidisciplinary

Evidence of Lipid Exchange in Styrene Maleic Acid Lipid Particle (SMALP) Nanodisc Systems

Gavin Hazell et al.

LANGMUIR (2016)

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Article Chemistry, Multidisciplinary

The Effect of Lipopolysaccharide Core Oligosaccharide Size on the Electrostatic Binding of Antimicrobial Proteins to Models of the Gram Negative Bacterial Outer Membrane

Luke A. Clifton et al.

LANGMUIR (2016)

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Article Multidisciplinary Sciences

Gram-negative trimeric porins have specific LPS binding sites that are essential for porin biogenesis

Wanatchaporn Arunmanee et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2016)

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Article Chemistry, Multidisciplinary

An Accurate In Vitro Model of the E. coli Envelope

Luke A. Clifton et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2015)

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Article Chemistry, Multidisciplinary

Effect of Divalent Cation Removal on the Structure of Gram-Negative Bacterial Outer Membrane Models

Luke A. Clifton et al.

LANGMUIR (2015)

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Review Biochemistry & Molecular Biology

The Fluid-Mosaic Model of Membrane Structure: Still relevant to understanding the structure, function and dynamics of biological membranes after more than 40 years

Garth L. Nicolson

BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES (2014)

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Review Biochemistry & Molecular Biology

Zooming in on disordered systems: Neutron reflection studies of proteins associated with fluid membranes

Frank Heinrich et al.

BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES (2014)

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Article Biochemistry & Molecular Biology

Colicin import into E. coli cells: A model system for insights into the import mechanisms of bacteriocins

Young Chan Kim et al.

BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH (2014)

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Meeting Abstract Biophysics

Understanding Colicin N Import into Gram Negative Bacterial Cells using Small Angle Neutron Scattering

Wanatchaporn Arunmanee et al.

BIOPHYSICAL JOURNAL (2014)

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Article Biochemistry & Molecular Biology

Outer Membrane Protein F Stabilised with Minimal Amphipol Forms Linear Arrays and LPS-Dependent 2D Crystals

Wanatchaporn Arunmanee et al.

JOURNAL OF MEMBRANE BIOLOGY (2014)

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Article Multidisciplinary Sciences

High coverage fluid-phase floating lipid bilayers supported by ω-thiolipid self-assembled monolayers

Arwel V. Hughes et al.

JOURNAL OF THE ROYAL SOCIETY INTERFACE (2014)

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Article Biochemistry & Molecular Biology

Structural Characterization of a Model Gram-Negative Bacterial Surface Using Lipopolysaccharides from Rough Strains of Escherichia coli

Anton P. Le Brun et al.

BIOMACROMOLECULES (2013)

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Article Multidisciplinary Sciences

Asymmetric phospholipid: lipopolysaccharide bilayers; a Gram-negative bacterial outer membrane mimic

Luke A. Clifton et al.

JOURNAL OF THE ROYAL SOCIETY INTERFACE (2013)

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Review Physics, Multidisciplinary

Neutrons and model membranes

G. Fragneto

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS (2012)

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Article Biochemistry & Molecular Biology

Low Resolution Structure and Dynamics of a Colicin-Receptor Complex Determined by Neutron Scattering

Luke A. Clifton et al.

JOURNAL OF BIOLOGICAL CHEMISTRY (2012)

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Article Multidisciplinary Sciences

Quantitative determination of ion distributions in bacterial lipopolysaccharide membranes by grazing-incidence X-ray fluorescence

Emanuel Schneck et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2010)

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Article Biophysics

Bacteriorhodopsin/amphipol complexes: Structural and functional properties

Yann Gohon et al.

BIOPHYSICAL JOURNAL (2008)

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Article Chemistry, Medicinal

Physicochemical properties of antibacterial compounds: Implications for drug discovery

Rosemarie O'Shea et al.

JOURNAL OF MEDICINAL CHEMISTRY (2008)

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Review Microbiology

The porin and the permeating antibiotic: a selective diffusion barrier in Gram-negative bacteria

Jean-Marie Pages et al.

NATURE REVIEWS MICROBIOLOGY (2008)

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Review Cell Biology

Membrane lipids: where they are and how they behave

Gerrit van Meer et al.

NATURE REVIEWS MOLECULAR CELL BIOLOGY (2008)

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Article Biotechnology & Applied Microbiology

Opinion - How many drug targets are there?

John P. Overington et al.

NATURE REVIEWS DRUG DISCOVERY (2006)

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Review Biochemistry & Molecular Biology

Amphipols:: polymeric surfactants for membrane biology research

JL Popot et al.

CELLULAR AND MOLECULAR LIFE SCIENCES (2003)

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Review Microbiology

Molecular basis of bacterial outer membrane permeability revisited

H Nikaido

MICROBIOLOGY AND MOLECULAR BIOLOGY REVIEWS (2003)

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Article Biochemistry & Molecular Biology

Predicting transmembrane protein topology with a hidden Markov model: Application to complete genomes

A Krogh et al.

JOURNAL OF MOLECULAR BIOLOGY (2001)

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Article Biophysics

First-principles determination of hybrid bilayer membrane structure by phase-sensitive neutron reflectometry

CF Majkrzak et al.

BIOPHYSICAL JOURNAL (2000)

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Article Biochemistry & Molecular Biology

Colicin pore-forming domains bind to Escherichia coli trimeric porins

LG Dover et al.

BIOCHEMISTRY (2000)

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