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Related Concept Videos

Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...

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Updated: May 11, 2026

Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method
09:43

Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method

Published on: April 11, 2020

Exhaustively sampling peptide adsorption with metadynamics.

Michael Deighan1, Jim Pfaendtner

  • 1Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, USA.

Langmuir : the ACS Journal of Surfaces and Colloids
|May 28, 2013
PubMed
Summary

Simulating peptide adsorption is challenging due to limited data and sampling issues. Parallel Tempering Metadynamics in the Well-Tempered Ensemble (PTMetaD-WTE) effectively simulates peptide/surface interactions, yielding crucial thermodynamic and conformational insights.

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Last Updated: May 11, 2026

Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method
09:43

Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method

Published on: April 11, 2020

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Simultaneous Affinity Enrichment of Two Post-Translational Modifications for Quantification and Site Localization

Published on: February 27, 2020

Area of Science:

  • Computational chemistry and biophysics
  • Surface science and nanotechnology

Background:

  • Accurate simulation of peptide and protein adsorption is hindered by a lack of experimental data and effective computational methodologies.
  • Existing simulation techniques struggle to address both strong surface binding and conformational sampling challenges simultaneously.

Purpose of the Study:

  • To improve the accuracy of simulating protein adsorption by developing and applying advanced enhanced sampling methods.
  • To investigate the adsorption behavior of specific peptides (LKα14, LKβ15) on different self-assembled monolayer (SAM) surfaces.

Main Methods:

  • Application of Parallel Tempering Metadynamics in the Well-Tempered Ensemble (PTMetaD-WTE) to explicitly solvated peptide/surface systems.
  • Simulation of peptide adsorption onto SAM surfaces with carboxyl and methyl terminal groups.
  • Comparison of PTMetaD-WTE with umbrella sampling and evaluation of common molecular dynamics force fields.

Main Results:

  • PTMetaD-WTE demonstrated rapid simulation convergence for peptide adsorption.
  • Elucidation of peptide binding free energies, side chain orientations, and preferred conformations.
  • Investigation into how surface/protein interface characteristics influence the binding free energy landscape.

Conclusions:

  • PTMetaD-WTE is an effective method for simulating peptide adsorption, providing detailed insights into binding thermodynamics and conformations.
  • The study highlights the impact of molecular interface features on peptide adsorption behavior.
  • The findings contribute to validating and improving computational models for protein-surface interactions.