Peptide Complex Analysis

Peptide complex analysis is the analytical characterization of peptides assembled with other peptides, biomolecules, or metal ions, revealing their composition, structure, interactions, and stability. In chemistry, it works by separating or detecting complex components according to properties such as size, charge, hydrophobicity, mass, and molecular binding, then interpreting chromatographic, spectrometric, or spectroscopic signals. These measurements can identify peptide sequences, chemical modifications, binding partners, and changes caused by pH, temperature, or solvent conditions. Peptide complex analysis supports purity assessment, formulation development, structural studies, and quality control in biochemistry, pharmaceutical science, and materials chemistry.

Peptide Complex Analysis - Related Videos

Research

JoVE Journal - Chemistry

Production of Disulfide-stabilized Transmembrane Peptide Complexes for Structural Studies

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Cited by 7 •

2013

Biophysical and biochemical studies of interactions among membrane-embedded protein domains face many technical challenges, the first of which is obtaining appropriate study material. This article describes a protocol for producing and purifying disulfide-stabilized transmembrane peptide complexes that are suitable for structural analysis by solution nuclear magnetic resonance (NMR) and other analytical applications.

Phosphopeptide Enrichment: An Antibody-based Immunoprecipitation Technique to Separate Specific Phosphorylated Peptides from Complex Peptide Mixtures

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2023

In this video, we demonstrate antibody-based immunoprecipitation of phosphopeptides from a peptide mixture. The enriched phosphopeptides are vacuum concentrated and stored for downstream analysis.

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

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Cited by 4 •

2013

The NMR-solution structure of a metallochaperone model peptide with Cu (I) was determined, and a detailed protocol from sample preparation and 1D and 2D data collection to a three-dimensional structure is described.

Research

JoVE Journal - Biology
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A Lectin HPLC Method to Enrich Selectively-glycosylated Peptides from Complex Biological Samples

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Cited by 13 •

2009

Lectin-conjugated POROS beads were employed for HPLC. Glycopeptide standards served as positive and negative controls. MARS-14 depleted, trypsin-digested human plasma was chromatographed and flow-through (FT) and bound fractions collected for ESI-LC-MS/MS analyses. Glycopeptides were enriched in the bound fraction as compared to FT.

A High Throughput MHC II Binding Assay for Quantitative Analysis of Peptide Epitopes

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Cited by 21 •

2014

Biochemical assays with recombinant human MHC II molecules can provide rapid, quantitative insights into immunogenic epitope identification, deletion, or design. Here, a peptide-MHC II binding assay scaled to 384-well plates is described. This cost effective format should prove useful in the fields of protein deimmunization and vaccine design and development.

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