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Title: pH-Induced reorientation of cytochrome c on silica nanoparticles

Journal Article · · Soft Matter
DOI: https://doi.org/10.1039/c8sm01909f · OSTI ID:1670686

The orientation of cytochrome c molecules at the surface of silica nanoparticles was studied in a wide pH range by combining small-angle neutron scattering, adsorption measurements, and molecular dynamics simulations. Here, the results indicate a reorientation of the ellipsoidal protein from head-on to side-on as the pH is increased. This is attributed to changes in the surface charge distribution of both the protein and the nanoparticles.

Research Organization:
Louisiana State University, Baton Rouge, LA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012432
OSTI ID:
1670686
Journal Information:
Soft Matter, Journal Name: Soft Matter Journal Issue: 3 Vol. 15; ISSN 1744-683X
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (41)

Scalable molecular dynamics with NAMD journal January 2005
Enzymatic activity on a chip: The critical role of protein orientation journal February 2005
Cytochrome c on Silica Nanoparticles: Influence of Nanoparticle Size on Protein Structure, Stability, and Activity journal February 2009
Fluorescent labeling and modification of proteins journal April 2013
Structural changes in protein molecules adsorbed on ultrafine silica particles journal April 1991
VMD: Visual molecular dynamics journal February 1996
Understanding protein adsorption phenomena at solid surfaces journal February 2011
Small angle scattering model for Pickering emulsions and raspberry particles journal March 2010
Inorganic nanoparticles for biomedicine: where materials scientists meet medical research journal January 2016
Pseudocontact shifts in biomolecular NMR using paramagnetic metal tags journal February 2017
Lateral Protein–Protein Interactions at Hydrophobic and Charged Surfaces as a Function of pH and Salt Concentration journal February 2016
Adsorption Orientation and Binding Motifs of Lysozyme and Chymotrypsin on Amorphous Silica journal March 2015
pH-Dependent Selective Protein Adsorption into Mesoporous Silica journal November 2015
When the Label Matters: Adsorption of Labeled and Unlabeled Proteins on Charged Surfaces journal October 2015
Modulating the Activity of Protein Conjugated to Gold Nanoparticles by Site-Directed Orientation and Surface Density of Bound Protein journal February 2015
Force Field and a Surface Model Database for Silica to Simulate Interfacial Properties in Atomic Resolution journal April 2014
Interpretation of Protein Adsorption:  Surface-Induced Conformational Changes journal June 2005
Surface Tailoring for Controlled Protein Adsorption:  Effect of Topography at the Nanometer Scale and Chemistry journal March 2006
Ordering Surfaces on the Nanoscale: Implications for Protein Adsorption journal February 2011
Effect of Nanoparticle Size on the Morphology of Adsorbed Surfactant Layers journal April 2010
Redox Properties of Cytochrome c Adsorbed on Self-Assembled Monolayers: A Probe for Protein Conformation and Orientation journal September 2002
Coverage-Dependent Orientation of Lysozyme Adsorbed on Silica journal April 2003
Protein Spreading Kinetics at Liquid−Solid Interfaces via an Adsorption Probe Method journal October 2005
Single Component and Selective Competitive Protein Adsorption in a Patchy Polymer Brush: Opposition between Steric Repulsions and Electrostatic Attractions journal February 2011
Aggregation of Silica Nanoparticles Directed by Adsorption of Lysozyme journal August 2011
Stabilization of Colloidal Suspensions: Competing Effects of Nanoparticle Halos and Depletion Mechanism journal November 2012
Quantitative Measurement of Nanoparticle Halo Formation around Colloidal Microspheres in Binary Mixtures journal July 2008
Dynamic protein coronas revealed as a modulator of silver nanoparticle sulphidation in vitro journal June 2016
The golden age: gold nanoparticles for biomedicine journal January 2012
Bridging interactions of proteins with silica nanoparticles: The influence of pH, ionic strength and protein concentration journal January 2014
Multifunctional nanoparticle–protein conjugates with controllable bioactivity and pH responsiveness journal January 2016
Highly efficient antibody purification with controlled orientation of protein A on magnetic nanoparticles journal January 2018
Nanoparticle self-assembly: from interactions in suspension to polymer nanocomposites journal January 2018
Surfactant adsorption and aggregate structure at silica nanoparticles: Effects of particle size and surface modification journal January 2012
Direct observation of a single nanoparticle–ubiquitin corona formation journal January 2013
Nanoparticle halos: A new colloid stabilization mechanism journal July 2001
An Introduction to Biological NMR Spectroscopy journal July 2013
Engineered nanomaterials: exposures, hazards, and risk prevention journal January 2011
Protein-specific Effects of Binding to Silica Nanoparticles journal October 2012
Protein Adsorption Orientation in the Light of Fluorescent Probes: Mapping of the Interaction between Site-Directly Labeled Human Carbonic Anhydrase II and Silica Nanoparticles journal May 2005
Controlling Redox Enzyme Orientation at Planar Electrodes journal May 2018

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