Proteomic Characterization
Proteomic Characterization - Related Videos
08:01
LERLIC-MS/MS for In-depth Characterization and Quantification of Glutamine and Asparagine Deamidation in Shotgun Proteomics
0 Views •
Cited by 6 •
2017
Here we present a step-by-step protocol of the long-length electrostatic repulsion-hydrophilic interaction chromatography-tandem mass spectrometry (LERLIC-MS/MS) method. This is a novel methodology that enables for the first time quantification and characterization of the glutamine and asparagine deamidation isoforms by shotgun proteomics.
09:29
Skeletal Muscle Gender Dimorphism from Proteomics
0 Views •
Cited by 4 •
2011
A straight-forward set of methods to isolate and determine the identity of the most abundant proteins expressed in skeletal muscle. About 800 spots are discerned on a two-dimensional gel from 10 mg muscle; this allows for the determination of gender-specific protein expression. These methods will give equivalent results in most tissues.
11:40
Characterization of Neuronal Lysosome Interactome with Proximity Labeling Proteomics
0 Views •
Cited by 6 •
2022
A neuronal lysosome proximity labeling proteomics protocol is described here to characterize the dynamic lysosomal microenvironment in human induced pluripotent stem cell-derived neurons. Lysosomal membrane proteins and proteins that interact with lysosomes (stably or transiently) can be accurately quantified in this method with excellent intracellular spatial resolution in live human neurons.
05:30
Isolation, Characterization, and Proteomic Analysis of Plasma-Derived Extracellular Vesicles for Cardiovascular Biomarker Discovery
0 Views •
Cited by 1 •
2025
This article describes a methodology for the isolation, characterization, and quantification of human plasma-derived extracellular vesicles (EV) and presents a workflow for label-free analysis of the EV proteome using liquid chromatography-tandem mass spectrometry (LC-MS/MS).
09:20
Proteomic Sample Preparation from Formalin Fixed and Paraffin Embedded Tissue
0 Views •
Cited by 48 •
2013
Archival formalin fixed and paraffin embedded (FFPE) clinical samples are valuable material for investigation of diseases. Here we demonstrate a sample preparation workflow allowing in-depth proteomic analysis of microdissected FFPE tissue.
FAQs
The workflow links peptide separation, mass spectrometry, and computational interpretation into one identification strategy. Liquid chromatography separates peptides before the instrument measures their mass-to-charge ratios. Those spectra are computationally matched to support protein identification and quantification, allowing the resulting protein profile to be related to cellular structure, signaling, or responses in neural samples.
Digesting extracted proteins into peptides creates the measurement units that can be separated and analyzed by mass spectrometry. Liquid chromatography then distinguishes peptide components, while their mass-to-charge ratios generate spectra for computational matching. This connection allows researchers to move from peptide-level instrument measurements to protein identification, quantification, and interpretation of molecular changes.
Proteomic profiles can differ according to development, neural activity, or disease state, making biological context essential during interpretation. Comparing these conditions may reveal changes in synaptic proteins, signaling pathways, or cellular responses. The comparison helps researchers associate particular protein patterns with changing neural states rather than viewing detected proteins independently of the condition being studied.
Neuroscience studies may begin with brain tissue or neural cells, depending on the biological question. Proteins are extracted from the selected sample, digested into peptides, separated by liquid chromatography, and analyzed by mass spectrometry. Computational matching of the resulting spectra then supports protein identification and quantification, producing a molecular profile for the neural material examined.
The approach can examine molecular changes in synaptic proteins, signaling pathways, and cellular responses. These measurements are useful when researchers want to connect protein patterns with development, neural activity, or neurological disease. By surveying several protein-related features in the same biological context, the method can contribute to a broader view of how neural cells function or respond.
Disease-related protein changes can provide clues about molecular mechanisms underlying neurological disorders. The resulting profiles may also help identify candidate biomarkers, meaning proteins or protein patterns that are associated with a biological condition. In this context, proteomic characterization supports both mechanistic investigation and the search for measurable molecular features linked to neurological disease.