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Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Ribosome Profiling02:24

Ribosome Profiling

Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...

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Related Experiment Video

Updated: Jun 17, 2026

Mass Spectrometry-Based Proteomics Analyses Using the OpenProt Database to Unveil Novel Proteins Translated from Non-Canonical Open Reading Frames
07:38

Mass Spectrometry-Based Proteomics Analyses Using the OpenProt Database to Unveil Novel Proteins Translated from Non-Canonical Open Reading Frames

Published on: April 11, 2019

Investigating protein isoforms via proteomics: a feasibility study.

Paul Blakeley1, Jennifer A Siepen, Craig Lawless

  • 1Faculty of Life Sciences, Michael Smith Building, University of Manchester, Manchester, UK.

Proteomics
|January 16, 2010
PubMed
Summary
This summary is machine-generated.

Proteomics can identify alternatively spliced protein isoforms, but a gap exists between current identifications and theoretical potential. Targeted experiments are needed to uncover more variants.

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Dynamic Proteomic and miRNA Analysis of Polysomes from Isolated Mouse Heart After Langendorff Perfusion
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Dynamic Proteomic and miRNA Analysis of Polysomes from Isolated Mouse Heart After Langendorff Perfusion

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Related Experiment Videos

Last Updated: Jun 17, 2026

Mass Spectrometry-Based Proteomics Analyses Using the OpenProt Database to Unveil Novel Proteins Translated from Non-Canonical Open Reading Frames
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Mass Spectrometry-Based Proteomics Analyses Using the OpenProt Database to Unveil Novel Proteins Translated from Non-Canonical Open Reading Frames

Published on: April 11, 2019

Deep Proteome Profiling by Isobaric Labeling, Extensive Liquid Chromatography, Mass Spectrometry, and Software-assisted Quantification
10:37

Deep Proteome Profiling by Isobaric Labeling, Extensive Liquid Chromatography, Mass Spectrometry, and Software-assisted Quantification

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Dynamic Proteomic and miRNA Analysis of Polysomes from Isolated Mouse Heart After Langendorff Perfusion
07:54

Dynamic Proteomic and miRNA Analysis of Polysomes from Isolated Mouse Heart After Langendorff Perfusion

Published on: August 29, 2018

Area of Science:

  • Molecular Biology
  • Genomics
  • Proteomics

Background:

  • Alternative splicing (AS) increases proteome complexity in eukaryotes.
  • Experimental identification of alternatively spliced protein isoforms remains limited.

Purpose of the Study:

  • To assess proteomics' capability in identifying alternatively spliced protein isoforms across species.
  • To evaluate the gap between identified and theoretically possible isoforms.

Main Methods:

  • Proteomic data analysis for human, chicken, and other model eukaryotes.
  • Comparison of Ensembl and Swiss-Prot annotations for AS.
  • Assessment of peptide identification support for annotated isoforms.

Main Results:

  • Proteomic data informs on over 33% of alternatively spliced genes in human and worm.
  • Over 600 alternatively spliced genes are supported by proteomics in chicken.
  • A significant gap exists between identified (10-52%) and feasible (90-99%) isoforms.

Conclusions:

  • Proteomics can identify alternatively spliced isoforms, but current coverage is suboptimal.
  • Combining Ensembl and Swiss-Prot annotations enhances AS discovery.
  • Targeted proteomic strategies are crucial for uncovering novel alternative protein isoforms.