Protein Migration Profiling
Protein Migration Profiling - Related Videos
09:35
Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
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Cited by 9 •
2017
Here we present protocols for affinity purification of protein complexes and their separation by blue native PAGE, followed by protein correlation profiling using label free quantitative mass spectrometry. This method is useful to resolve interactomes into distinct protein complexes.
08:07
Profiling of Surface Protein Epitopes on Viral Particles by Multiplex Dual-Reporter Strategy
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2024
Here, we describe a newly developed multiplex fluorescent immunoassay that uses a dual-reporter flow cytometric system to concurrently detect two unique spike protein epitopes on intact severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) viral particles that had been captured by angiotensin-converting enzyme-2-coupled magnetic microspheres.
10:02
Standardized SDS-PAGE Workflow for Personalized Protein Corona Profiling in Early Cancer Detection
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2025
This protocol standardizes SDS-PAGE analysis for personalized protein corona profiling on nanoparticles, enabling reproducible, scalable, and low-cost detection of cancer-specific signatures. Designed for early diagnosis of pancreatic ductal adenocarcinoma, it offers a practical, REASSURED-aligned alternative to complex proteomic methods in both research and clinical settings.
10:26
Live-cell Imaging of Migrating Cells Expressing Fluorescently-tagged Proteins in a Three-dimensional Matrix
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Cited by 1 •
2011
Cellular processes such as cell migration have traditionally been studied on two-dimensional, stiff plastic surfaces. This report describes a technique for directly visualizing protein localization and analyzing protein dynamics in cells migrating in a more physiologically relevant, three-dimensional matrix.
08:24
The Transwell Migration Assay
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2023
Cells migration in response to chemical cues is crucial to development, immunity and disease states such as cancer. To quantify cell migration, a simple assay was developed in 1961 by Dr. Stephen Boyden, which is now known as the transwell migration assay or Boyden chamber assay. This set-up consists an insert which separates the wells of a multiwell plate into top and bottom compartments. Cells whose migration is to be studied are seeded into the top compartment and the chemoattractant...
FAQs
SDS disrupts noncovalent interactions within and between proteins and gives them a more similar charge-to-mass ratio. This reduces the influence of each protein’s native charge on its movement through the gel matrix. As a result, migration differences primarily reflect apparent molecular size, allowing researchers to compare sample proteins with molecular-weight standards.
Protein movement can reflect several properties at once, including charge, conformation, and interactions. A protein’s shape may affect how readily it passes through the porous medium, while its charge influences its response to the electric field. Consequently, migration profiles can provide information about structural or interaction differences that size-based interpretation alone may not reveal.
Molecular-weight standards provide reference migration patterns for proteins of known apparent mass. Comparing sample positions with these references supports estimation of apparent molecular mass and helps identify changes between profiles. The same comparison can also reveal additional components, altered subunits, or differences in sample composition when bands do not match the expected pattern.
A typical workflow places the protein sample and molecular-weight standards in a separation medium, applies an electric field, and examines the resulting migration pattern. Under SDS-PAGE conditions, SDS first establishes a more uniform charge-to-mass relationship. The separated pattern is then compared across samples or with standards to assess composition and apparent mass.
The method supports protein purification by showing whether unwanted components remain, and it assists expression analysis by comparing protein patterns between samples. It also contributes to quality control, where reproducible migration profiles can indicate consistent composition. These uses make the technique valuable for tracking sample changes throughout biochemical workflows.
Changes in migration patterns can indicate altered subunit composition, differences in sample purity, or structural and post-translational differences. In biochemistry, these observations help connect a protein’s separation behavior with changes in its molecular state. Interpretation is strongest when profiles are compared with appropriate standards and with related samples analyzed under consistent conditions.